Current Situation, Development Suggestions and Prospects of Drying Equipment Industry

At present, the conventional drying equipment needed in the domestic market and the main drying equipment needed in the international market can basically be manufactured by our own country, which shows that the history of our country's drying equipment mainly imported has come to an end. But there are still some problems and worries. According to the forecast of China General Machinery Drying Equipment Industry Association, in the next few years, the demand of drying equipment in chemical industry will reach about 3000 sets; the annual demand of pharmaceutical drying equipment will reach about 3000 sets; and the annual demand of drying equipment in agriculture, forestry, grain, light industry and other industries will reach about 3000 sets. About 5000 sets. At present, the domestic market share of drying equipment in China has reached more than 80%.

  It is expected that the domestic drying equipment will occupy more than 90% of the domestic market during the Tenth Five-Year Plan period. At present, the existing problems are mainly manifested in two aspects: regional concentration and weak technological innovation ability. Most of the enterprises in drying equipment industry in China are derived from the early enterprises in this industry. Their geographical location is relatively centralized, and their personnel structure has serious defects. Up to now, enterprises mainly distribute in Jiangsu, Zhejiang, Shanghai, Liaoning and Heilongjiang. The enterprises in these areas account for almost 50% of the total industry. In contrast, there are still some drying equipment manufacturers in some areas of China. The fierce competition in the industry, some enterprises pay attention to immediate interests, lack of systematic development ideas, slow overall quality improvement, seriously hampering the normal development of the industry. After the reform and opening up, especially in recent years, the potential of China's economic growth has been effectively released, the supply-demand relationship formed by the shortage economy has undergone a fundamental change, and the buyer's market has initially formed. Under the pressure of the buyer's market, some enterprises are catching up with the market rather than looking for and exploring the market. The energy of enterprises is focused on the products which have more market demand and mature in the near future. Therefore, in the oven, vibrating fluidized bed, spray dryer and other products, the manufacturers are more concentrated, and the competition is fierce. There are fewer enterprises engaged in drying equipment development in the industry, and the improvement of new products and the introduction of new products mainly rely on mutual imitation. It is suggested to adopt advanced technology to improve product quality. There is still a certain gap between China's drying equipment technology and the same industry in developed countries.

  At present, the market is dominated by medium and low-tech products. After China's accession to the WTO, more international counterparts will enter the domestic market. With the intensification of international competition, we will face tremendous competition pressure. The world famous manufacturers of drying equipment, such as Nile Group of Denmark and Ogawa Corporation of Japan, have set up branches in China to seize the Chinese market. With the acceleration of economic globalization, more and more multinational companies will transfer their target to the Chinese market. Increasingly fierce competition requires our enterprises to improve product quality through technological progress, absorption of foreign advanced technology and independent innovation. The idea of product development should focus on the large-scale equipment, the automation degree of control, the surface treatment quality of equipment and the selection of corrosion-resistant materials, and develop multi-functional combination machines to prolong the life cycle of products. Industry associations should organize more enterprises to participate in international technology exchanges, absorb the latest technological achievements, and accelerate the improvement of the technical level of the whole industry. To adjust the structure of enterprises and cultivate their core competitiveness, the drying industry in China is characterized by small, weak, unskilled and inexperienced enterprises, large numbers and low overall quality. Most enterprises are backward in management and fail to achieve the appropriate economies of scale, and should be guided and coordinated by industry associations to change the situation of blind development. Relatively concentrated enterprises in Jiangsu, Zhejiang and Shanghai can consider transferring to the central and western regions by means of joint ventures, cooperation and acquisition, so as to find a broader space for the survival and development of enterprises. Enterprises in the industry should take the road of strong alliance, cultivate some large companies and enterprise groups with strong technical strength, famous brands and independent intellectual property rights in the industry. Form their own unique products and services. The innovation ability of drying equipment manufacturers in China is low, and few enterprises can launch new technologies and new products with independent intellectual property rights. This is an important reason for the slow development of drying technology in China.

  At present, dozens of universities and research institutes in China are engaged in the development and research of drying technology, which is distributed in the east, west, north and south of China, but most of the knowledge achievements have not been effectively translated into real productive forces. In order to become the main body of technological innovation, enterprises should unite directly with these universities and scientific research institutions in various forms, so as to make rational allocation and utilization of resources, and effectively cultivate and develop the innovative ability of enterprises. Prospects for future competition in drying equipment industry will focus on product quality, technical level, after-sales service and price. In the type of drying equipment, hot air heating atmospheric drying equipment, vacuum drying equipment will be the main type. Users in other special fields such as far infrared drying equipment, microwave drying equipment will gradually expand the number of applications. In the field of food and drug drying, the demand for large-scale equipment in vacuum freeze-drying equipment will increase, and the demand for equipment with functional combination (such as granulation-drying, drying-filtration) will also increase. High-automation drying equipment will be welcomed in some application fields. In addition, the appearance quality of drying equipment will be paid more and more attention. The corrosion resistance and reliable performance of corrosive materials drying equipment will be paid special attention by users.

  At present, China's drying equipment industry has begun to enter a more mature stage of development, which can better meet the actual needs of users in various fields, but the price is only 1/3 of the same foreign products, which makes China's drying equipment in the market competition than imported equipment has obvious price advantages; on the other hand, because of dry. Drying equipment is large in volume and mostly involves on-site installation, commissioning and after-sales service. Therefore, it is more convenient for domestic users to choose domestic equipment than imported equipment. As far as the international market is concerned, China's accession to the WTO will be more conducive to expanding the export of drying equipment. At present, the main export products of drying equipment in China are vacuum drying equipment, vibration drying equipment, drying equipment for small and medium-sized grain, food and agricultural, forestry and local products. The annual export volume exceeds 100 sets. The main export areas are Southeast Asia and other developing countries, and the door of European and American markets has been opened. At present, China's drying equipment exports accounted for less than 5% of the total domestic drying equipment. Experts expect that the proportion of drying equipment exports in the total domestic drying equipment will reach more than 10% during the Tenth Five-Year Plan period. In the international competition, the main competitors of China's drying equipment manufacturers are Denmark, Switzerland, the United Kingdom, Germany, the United States and Japan. Compared with competitors, the advantages of drying equipment in our country are low price, and the shortcomings mainly lie in the degree of automation control, appearance quality, complete set and functional combination of products to be further improved.

  Therefore, domestic drying equipment manufacturers should make full use of the opportunity of China's accession to the WTO, strengthen technical exchanges with foreign countries, draw on the advantages of advanced drying equipment abroad, speed up the improvement of drying equipment automation control, appearance quality, complete sets and functional combination, narrow the gap with foreign products, and improve me. The trust degree of domestic products among users makes our drying equipment occupy a place not only in the domestic market, but also in the foreign market. The varieties of drying equipment produced in China are increasing, the scope of application is expanding, the level and quality of products are improving rapidly, and the market competitiveness is increasing. In particular, our government has issued various policies to support the export of products, creating excellent external conditions for domestic drying equipment manufacturers, which shows that the development prospects of drying equipment in China are good. Common knowledge of drying equipment: there are spray drying machines, air driers, fluidized bed driers, fluidized bed spray granulation driers and so on. Spray drying is one of the fastest growing equipment in drying equipment.

  There are three conventional atomization methods: rotating atomization, pressure atomization and airflow atomization. Rotary atomizing spray drying is characterized by large production capacity per unit (spray volume up to 200t/h), easy control of feed quantity, large operation flexibility and wide application. Pressure atomizer spray drying is characterized by the manufacture of coarse particles and easy maintenance. Because the nozzle hole is small and easy to plug, the material must be filtered strictly. The nozzle hole is easy to wear and must be made of wear-resistant material. Pressure nozzle also has a new structure, called pressure-air nozzle. It is characterized by a pressure nozzle at the center and an air flow nozzle at the ambient gap. The atomization is divided into two stages: the pressure nozzle first forms a liquid film, which is atomized by the airflow for the second time to make the droplets finer. The advantages of this type of nozzle are:

(1) By adjusting the pressure of compressed air, the droplet diameter can be adjusted, and the operation is simple.

(2) High-yield, high-viscosity materials and liquids can also be atomized into fine droplets;

(3) If compressed air is stopped, the original pressure nozzle can also be used.


Air atomizer is mainly used in laboratories and intermediate factories with high power consumption. Neither of the first two atomizers can atomize the liquid, and the air-flow atomizer may atomize. High viscosity paste, paste and filter cake materials can be atomized by a three-fluid nozzle. Airflow dryer airflow drying technology is mature, if there is operational data, it can be directly designed. At present, many drying equipment manufacturers can provide this type of equipment. The fluidized-bed dryer is second only to the spray dryer. It is divided into fluidized bed dryer with agitator at feeding position and fluidized bed dryer with internal heat transfer. When fluidized bed drying is easy to solidify or agglomerate powder and granular materials, fluidization difficulties will occur in the feeding section with large water content. At this time, agitators are set up in the feeding section to eliminate agglomeration problems, and normal fluidization can be achieved. The latter is a combination of heat transfer and convection. When the amount of hot air used in the normal fluidized state is far from enough to meet the heat required for drying, an internal heat exchanger is used to supply part or most of the heat. This operation mode can significantly save energy. There are many forms of internal heat exchanger. Fluidized bed dryers are also often used in the second and third stages of combined drying. Vibrating fluidized bed is applied to ordinary fluidized bed. Vibration fluidization can be divided into two types from the source of vibration: one is driven by vibration motor, the other is driven by ordinary motor through the excitation box to produce spring vibration. When the size of the vibrating fluidized bed is large, the latter has better effect. Fluidized bed spray granulation drier is an organic combination of three technologies: fluidization technology, atomization technology and drying technology. It sprays the atomized liquid into the fluidized seed bed, so that the seed grows and dries continuously, and when it grows up to the specified size, it discharges out of the device. The equipment has small volume and large production capacity, and can produce large particles. The industrial application of this equipment has been increasing day by day.

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