Heat exchanger with spiral plate design is formed by steel plate bundle as a whole, forming two identical spiral channels. Two heat transfer medium are meant to meet a counter-current flow, to greatly enhance the heat exchange effect.
It will work well for steam-steam, steam-liquid, liquid-liquid heat transfer, which is applied in chemical, petroleum, solvent, medicine, food, light industry, textile, metallurgy, coking and other industries. The structure is divided into non-detachable spiral Plate Heat Exchanger and detachable spiral plate heat exchanger, according to different customers` requirements.
Most of the time, SS304 is the main material. It protects the exchanger from corrosion over time, while ensuring great transfer efficiency. Pressure range 1.0MPa~2.5MPa also gives the plate heat exchanger a certain bearable requirements.
Distance column, special steel bar inside of the spiral plate heat exchanger, also contributes to its stable connection between plates, and also offers a turbulence flow among the channel for efficiency consideration.
Spiral Plate Heat Exchanger,Spiral Cooler,Spiral Flow Heat Exchanger,Spiral Cooler Heat Exchanger Guangdong Jiema Energy Saving Technology Co.,Ltd , https://www.jmheatexchanger.com
With the rapid expansion of the global petrochemical industry, the demand for advanced granulators has surged within China's domestic market. Recently, Dalian Rubber Plastics Machinery Co., Ltd. announced plans to launch a large-scale domestic plastic granulator at its new facility in May 2008. This development highlights the growing need for high-end machinery in the plastics sector, where imported equipment still holds a dominant position.
Plastic granulators are complex machines that integrate mechanical, electrical, and instrumentation systems, offering a high degree of automation. They play a critical role in large-scale ethylene projects. At a recent meeting of LCM China users in Japan, experts emphasized that as petrochemical plants expand, so too does the demand for more efficient and stable granulation units with improved energy efficiency.
Historically, China attempted to develop 70,000-ton-per-year pelletizing systems through foreign collaborations, but none succeeded. Today’s large-scale granulation units require capacities exceeding 50 tons per hour—equivalent to 300,000–400,000 tons annually—making their design and manufacturing extremely challenging. Currently, only a handful of companies, such as Kobe Steel, Japan Steel, and Farrell, possess the full technical capability to produce these systems.
Compared to international standards, China’s granulator technology lags behind. Although the country has made progress by absorbing advanced technologies, many large-scale systems remain unimplemented. Domestic extrusion granulators still rely heavily on imports, especially for polyolefin production. Experts suggest that future R&D should focus on large-scale, high-precision, and advanced control technologies.
China’s plastics machinery industry has experienced significant growth, reflected in both import and export figures. The quality and technological capabilities of domestic equipment have improved markedly. However, despite being a major manufacturer and consumer of plastic machinery, China is not yet a global leader in this field. With around 400 manufacturers, most are concentrated in the economically vibrant coastal regions like the Pearl River and Yangtze River Deltas. In contrast, areas like Tibet and Xinjiang lack local production facilities.
The reason for this gap lies in China’s relatively weak foundation in high-precision equipment, which still requires imports. Despite the expanding market, imports still account for about half of the total demand. Large-scale granulation units, precision injection molding machines, and other advanced equipment are often imported due to technical limitations.
While there are gaps between Chinese and foreign technologies, domestically produced equipment is not necessarily inferior. Many products meet international standards and could replace imported alternatives. To close the gap, the industry must continue to innovate and improve management practices. Chinese manufacturers are actively working to align with global standards and compete internationally.
In terms of development speed and economic indicators, the plastics machinery sector ranks among the top 190 industries in the machinery sector. China currently produces about 200,000 sets of plastic machinery annually, leading the world. Ningbo alone hosts over 100 injection molding machine manufacturers, including Haitian, which exports to more than 30 countries and generates around $200 million in revenue annually.
According to industry reports, China’s plastics sector remains in a period of high growth. It is projected that by 2010, the output of plastic machinery will reach 500,000 units. While general-purpose machinery faces overcapacity, companies undergoing upgrades are investing in more efficient and precise equipment to boost innovation.
As the saying goes, without a diamond drill, it's hard to work with porcelain. For the plastics industry to truly “breakthrough,†there is still much work to be done.