The low level of automation of domestically produced drying equipment and the backwardness of control methods are common problems. At the current level of automation, it is not difficult to solve the control problem in drying equipment, but Zui lacks the problem of reasonable combination of automatic control technology and drying equipment. Different materials have different requirements for the dryer. Similarly, different materials have different requirements for control methods. The role of automatic control in dryers is well known, but its one-time investment is also a concern for people, and sometimes the investment in control equipment exceeds the investment in the mechanical part of the dryer. Baby Squid,Baby Octopus,Poulp Squid,Squid Tube GOLD STAR FISHERY ZHOUSHAN CO.,LTD. , https://www.goldstar-aquatic.com The development of drying equipment in China and the skills of purchasing drying equipment
It is also a subject that should be studied at present to determine the appropriate control method for the specific drying project in order to determine the control plan reasonably for the dryer and drying process. In addition, we should also pay attention to the amplification study of drying equipment. Amplification involves disciplines such as fluid mechanics, mechanics, thermodynamics, heat transfer, materials science, dust removal, corrosion protection, electrical appliances, and control. Some problems are likely to occur during the enlargement process. Therefore, the amplification of the drying device is by no means a simple geometric enlargement. In this respect, it depends to a large extent on industrialization experience, mastery of material properties and knowledge of drying equipment. The phenomena that may occur during the amplification process should be reasonably and objectively predicted, and the corresponding scheme can be proposed.
The so-called research amplification effect is to grasp the dry theory and drying technology, pay attention to accumulate practical experience, summarize the amplification law of equipment, and accumulate experience for engineering design. With the rapid development of China's economy, drying equipment manufacturers have sprung up, and drying equipment has gradually occupied a certain position in the Chinese market. According to statistics, there are currently more than 500 domestic drying equipment manufacturers, and the annual market demand exceeds 3 billion yuan. However, the technical level of most drying equipment manufacturers is not high, and some even have no technology at all. A group of “no-name military†with low investment and low technical content has squeezed the market with a large number of low-quality and low-priced equipment, which not only affects the overall image of drying equipment, but also causes the “guilt†of domestic drying equipment prices, thus making China dry. The overall competitiveness of the industry is difficult to achieve. In contrast to the current situation of the drying equipment industry, at present, there are dozens of universities and research institutes in China engaged in the development and research of drying technology, but most of the scientific research results have not been transformed into actual productivity.
Therefore, experts believe that the increasingly fierce competition requires the drying equipment industry to actively cooperate with research institutes to enhance the added value of products through technological advancement and independent innovation. Experts also believe that drying equipment manufacturers can aim at one or several industries according to their own advantages, in-depth study of material characteristics, establish authority in small industries, and occupy the market. Each drying unit has its own specific application range, and each material can find several drying devices that can meet the basic requirements, but there is only one suitable for Zui. If the selection is not appropriate, in addition to the unnecessary one-time high procurement cost, the user has to pay a heavy price throughout the lifetime, such as low efficiency, high energy consumption, high operating cost, poor product quality, and even device fundamentals. Can't run normally and so on.
The following are the general principles for the selection of drying equipment. It is difficult to say which one or which items are important. The ideal selection must be based on its own conditions, and sometimes compromises are necessary.
1. Applicability ------- The drying device must first be applicable to specific materials and meet the basic requirements for drying of materials, including the ability to process materials well (feed, transport, fluidize, disperse, pass Heat, discharge, etc.), and can meet the basic requirements of processing volume, dehydration amount, product quality and so on.
2. High drying rate---only in terms of drying rate, the material is highly dispersed in hot air during convection drying, the critical moisture content is low, the drying speed is fast, and the same convection drying, the drying method has different critical moisture content, so The drying rate is also different.
3. Low energy consumption ------- Different drying methods have different energy consumption indexes. Generally, the thermal efficiency of conductive drying can reach 100% theoretically, and convection drying can only be about 70%.
4. Saving investment-----Drying equipment that performs the same function, sometimes its cost difference is very different, should choose the lower one.
5. Low operating costs - equipment depreciation, energy consumption, labor costs, maintenance costs, spare parts costs, etc. should be as low as possible.
6. Prefer the drying device with simple structure, sufficient supply of spare parts, high reliability and long service life.
7. Meet environmental protection requirements, good working conditions and high safety.
8. Before the selection, Zui can make the drying experiment of the material, and deeply understand the drying device (extension and disadvantage) that has been used in similar materials, which is often helpful for proper selection.
9. Not relying entirely on past experience, focusing on absorbing new technologies and listening to expert opinions.