At present, China's inorganic salt industry has basically formed an industrial production system supporting the development of the national economy. In addition to the chemical industry's own supporting services, inorganic fibers, inorganic antibacterial agents, power materials, conductive materials, fine ceramics, inorganic flame retardants, fluorescent chemicals, pharmaceutical chemicals, magnetic materials, paper chemicals, oilfield chemicals, food Additives and other fields play an important role. The refined rate of the product is about 35%, and the inorganic salt industry is not only satisfied with the general needs of the industry. We are developing professionally, functionally, serially, and finely. We are actively developing new products for the development of new and high technologies, as well as traditional products for surface activation and ultra-fine crystalline particles. The traditional inorganic salt products must be modified, purified and refined, and their application value and application range can be fundamentally transformed into fine, special and functional materials. Regardless of new products for the development of new and high technologies, or traditional products that are surface-activated and refined, besides technological innovation, the key is equipment. It not only satisfies the requirements of process technology, but also guarantees industrial hygiene and safety and environmental protection. Therefore, technological innovation and improvement of unit equipment level are the eternal themes of the inorganic salt industry.
The general requirements of the inorganic salt industry for drying equipment are high thermal efficiency, low energy consumption, simple configuration, convenient control, small footprint, and safe and hygienic operating environment. At present, the most common drying equipment used in the inorganic salt industry are: rotary tube dryers, rotary indirect heating dryers, disc continuous dryers, and air dryers (also divided into pulse air flow, air flow rotation, positive and negative pressure secondary Air drying, rotary flash dryer, rotary drum dryer, Spray Dryer (also divided into granulation, powder, centrifugal, pressure), vibrating fluidized bed dryer, static vacuum dryer, Hot air circulation oven, rake type, paddle type vacuum dryer, boiling dryer (horizontal, vertical) and so on. These dryers provide guarantees for product quality. However, there are problems with tail gas collection. For the ever-increasing number of nano-scale products, the original particle size is getting smaller and smaller, the potential moisture content of the paste-like material is increased, and the company continues to grow toward large-scale and large-scale, and companies are eager to combine drying equipment. In particular, some tonnage products, such as precipitated calcium carbonate, currently produce more than 3 million tons of the country, the smallest production line has an annual output of 10,000 tons, and the scale of 100,000 tons requires five sets of drying equipment. A company in Guangxi plans to get 500,000. Ton, according to the current level of drying equipment, the amount of “dust†collected from the tail gas after drying is irrespective of the floor space of the equipment. According to pulse bag filters commonly used in the industry, the operating environment is very harsh and effective measures must be taken to solve them. There are similar problems with drying equipment for nano calcium carbonate.
Therefore, it is hoped that the equipment development unit will focus on solving two problems: one is the problem of drying of paste-like fine materials with high moisture content, and the other is that the tail gas after the drying of the materials is subject to the “dust†industrial hygiene issue and is also an environmental issue. Still taking the calcium carbonate industry as an example, more than 200 companies across the country, after many years of exploration and testing in the selection of drying equipment, basically used rotary direct heating dryers, disc continuous dryers, rotary column dryers, etc. In addition to satisfying the efficiency, energy consumption and exhaust gas “dust†are not ideal. Once a calcium carbonate enterprise is covered with a layer of white calcium carbonate powder from the ground to the roof, it is even white on the tables and chairs in the office. This aspect remedies the problem. What is more important is that the tail gas after drying is closed to dust.
Rotary direct heating dryer
Therefore, the combined drying equipment should include: heat source equipment, primary and secondary drying equipment, and tail gas collection “dust†equipment, etc. It is hoped that equipment manufacturers and research institutes will make a fuss about high thermal efficiency, low energy consumption, simple configuration, and easy control. , Make a fuss about the combination drying equipment, serve others, develop yourself. If the calcium carbonate industry's drying problem is solved and the equipment is highly efficient and environment-friendly, other types of drying problems will be solved. Recently, the industry has introduced the combination of energy-saving and efficient drying equipment and PVC dust removal equipment produced by An Qi Machinery Co., Ltd., basically solving the problem. For the inorganic salt industry, most of the products are crystalline pellets, dry without dust problems, and there are no major problems with vibrating fluidized bed dryers, fluidized bed drying or spray drying equipment. Mainly used varieties of boride and borate, white carbon, sodium metasilicate, baking soda and other industries. Air drying is mainly used in Yuan Mingfen, sulphate and other industries. In a word, the inorganic salt industry has a large number of drying equipments, many varieties, and great potential for technological innovation. In particular, there should be breakthroughs in energy consumption and energy selection. This is an important factor in the technological innovation of the inorganic salt industry and the drying equipment industry. Question.
The hot air circulating oven is a universal dryer which can handle all the materials. The heat source can be electricity or steam. Such dryer will take more time to complete one batch of material. It is a batchwise operation.
This drying oven is suitable for the material or the product hot solidification, drying de-watering in the pharmaceutical, chemical, food, farming, side-product, aquatic product, light industries, heavy industry and so on.
Such as: raw material medicine, crude drug, prepared herbal medicine of Chinese traditional medicine, plaster, power, particle, drinking agent, pill, packing bottle, pigment, dyestuff, de-watering vegetable, dried fruit piece, sausage, plastics, resin, electric component, baking varnish and etc.
Most the hot air is circulated in the oven. The heat efficiency is high and the energy is saved.
The whole machine is low in the noise. The operation is in balance. The temperature is controlled automatically. The installation and maintenance is easy. The application is wide. The machine can be used for drying various materials and is versatile drying equipment.
Hot Air Ovens, Hot Air Circulation Oven, Hot Air Drying Oven
Changzhou Ruide Drying Engineering Technology Co., Ltd , https://www.rddryer.com