From the development direction of drying technology and equipment manufacturing in recent years, the development trend of drying equipment for dyes in China can be summarized as follows:
1. Drying equipment to large-scale development:
From the amount of steam produced by the dryers recently manufactured, the trend of drying equipment to large-scale development, such as spray dryers, has some 800 kg/hour of evaporated water, and an annual output of more than 1,300 tons of disperse dyes. This is mainly due to the fact that domestic dye production is decentralized, with small and medium sized factories mostly, and each type cannot be caused by centralized production. It is estimated that dryers will not grow to large scale in the near future. Small size, easy-to-replace varieties, and multi-functional drying will be welcomed.
2. Develop modular dryers:
The combined dryer has the advantages of energy saving, compact equipment, flexible playground, etc. It has long been applied to industrial production in foreign countries. There are few examples of successful applications in China. It is understood that some colleges and universities, research institutes are doing this work, it is estimated that in the next few years will be a new type of dryer to promote the use.
3. More and more paste material dryers:
Flash dryers, paddle dryers, and vibration carrier dryers for the treatment of paste materials have developed rapidly because no solution to the drying of such materials has been found before, and sometimes some irrationality is taken (such as spray drying after dilution with water). The method of drying, the emergence of such equipment can directly filter cake drying, save energy, will become the main drying equipment.
4. Speed ​​up energy conservation research and new product development:
The thermal efficiency of drying equipment is low, and the average thermal efficiency is estimated to be about 30 to 40%, which has great potential for energy saving. The use of heat pipes, heat pump technology, and partial recycling of exhaust gas to recover waste heat is the future direction of development.
5. Develop dryers for special materials to make new dryers have greater coverage of dye drying.
Fourth, the development of dye drying equipment, several views:
1. The intensity of scientific research should be increased. The drying of dyes is not a simple process of evaporation of water, but at the same time as drying, dye forming and crystal transformation are sometimes completed. Therefore, the drying equipment should be studied based on the characteristics of the dye itself.
2. Efforts have been made to improve the quality of the product. There is a large gap between domestic dryers and foreign countries in terms of processing quality, and the workmanship is rough. Drying equipment factory should have sophisticated processing equipment, complete physical and chemical testing methods and a reliable comprehensive quality assurance system. If the surface of the contact materials of the manufactured equipment is mirror-polished, the weld seam is also smoothed, and the material is not sticky to the walls, which is convenient for cleaning.
3. Improve the dryer's automation level. The control system of domestic drying equipment is still relatively backward, and it is in a manual or semi-automatic state. The system is often not easy to control, which makes the product quality unstable and increases the operating costs. Microcomputer control is widely used abroad and we should also work hard in this area.
4. Build a more advanced and perfect test center. So far, there is not a fully-equipped drying test center in China, which has affected the development of drying technology and the development of new products to some extent. It is suggested that relevant departments should increase input in this area so that the development of drying technology can be on the track of a virtuous circle.
5. Pay attention to the after-sales service and information feedback of the equipment, and the high-quality service can better establish the corporate image. The after-sales service of the product is good. Through the after-sales service, many problems in production can be returned to the equipment manufacturer. These data are beneficial to the upgrading of products and the development of new products.
In short, the development of dye drying technology and equipment has been vigorously carried out. More and more personnel are engaged in this field. In the near future, the level of dye drying in China will be raised to a new level.
1. Drying equipment to large-scale development:
From the amount of steam produced by the dryers recently manufactured, the trend of drying equipment to large-scale development, such as spray dryers, has some 800 kg/hour of evaporated water, and an annual output of more than 1,300 tons of disperse dyes. This is mainly due to the fact that domestic dye production is decentralized, with small and medium sized factories mostly, and each type cannot be caused by centralized production. It is estimated that dryers will not grow to large scale in the near future. Small size, easy-to-replace varieties, and multi-functional drying will be welcomed.
2. Develop modular dryers:
The combined dryer has the advantages of energy saving, compact equipment, flexible playground, etc. It has long been applied to industrial production in foreign countries. There are few examples of successful applications in China. It is understood that some colleges and universities, research institutes are doing this work, it is estimated that in the next few years will be a new type of dryer to promote the use.
3. More and more paste material dryers:
Flash dryers, paddle dryers, and vibration carrier dryers for the treatment of paste materials have developed rapidly because no solution to the drying of such materials has been found before, and sometimes some irrationality is taken (such as spray drying after dilution with water). The method of drying, the emergence of such equipment can directly filter cake drying, save energy, will become the main drying equipment.
4. Speed ​​up energy conservation research and new product development:
The thermal efficiency of drying equipment is low, and the average thermal efficiency is estimated to be about 30 to 40%, which has great potential for energy saving. The use of heat pipes, heat pump technology, and partial recycling of exhaust gas to recover waste heat is the future direction of development.
5. Develop dryers for special materials to make new dryers have greater coverage of dye drying.
Fourth, the development of dye drying equipment, several views:
1. The intensity of scientific research should be increased. The drying of dyes is not a simple process of evaporation of water, but at the same time as drying, dye forming and crystal transformation are sometimes completed. Therefore, the drying equipment should be studied based on the characteristics of the dye itself.
2. Efforts have been made to improve the quality of the product. There is a large gap between domestic dryers and foreign countries in terms of processing quality, and the workmanship is rough. Drying equipment factory should have sophisticated processing equipment, complete physical and chemical testing methods and a reliable comprehensive quality assurance system. If the surface of the contact materials of the manufactured equipment is mirror-polished, the weld seam is also smoothed, and the material is not sticky to the walls, which is convenient for cleaning.
3. Improve the dryer's automation level. The control system of domestic drying equipment is still relatively backward, and it is in a manual or semi-automatic state. The system is often not easy to control, which makes the product quality unstable and increases the operating costs. Microcomputer control is widely used abroad and we should also work hard in this area.
4. Build a more advanced and perfect test center. So far, there is not a fully-equipped drying test center in China, which has affected the development of drying technology and the development of new products to some extent. It is suggested that relevant departments should increase input in this area so that the development of drying technology can be on the track of a virtuous circle.
5. Pay attention to the after-sales service and information feedback of the equipment, and the high-quality service can better establish the corporate image. The after-sales service of the product is good. Through the after-sales service, many problems in production can be returned to the equipment manufacturer. These data are beneficial to the upgrading of products and the development of new products.
In short, the development of dye drying technology and equipment has been vigorously carried out. More and more personnel are engaged in this field. In the near future, the level of dye drying in China will be raised to a new level.