China's inorganic salt industry is based on natural resources (minerals, salt lakes, underground brines, seawater) and the use of recycling, renewable resources as the main raw material for chemical production of the basic raw material industry. In the early years after the founding of the People's Republic of China, it was only able to produce dozens of products and the output was about 200,000 tons. After more than 50 years of development, China's inorganic salt industry has established a unique and relatively complete industrial system including scientific research, production, and trade. It has become the world’s second largest producer and exporter after the United States, and is one of the major industries for the export of chemical systems in China. At present, there are more than 1,000 varieties of inorganic salts produced in China, with a production capacity of more than 35 million tons and an annual output exceeding 30 million tons. The output of many varieties ranks among the top in the world. Such as: yellow phosphorus, sodium sulfate, barium carbonate, potassium permanganate, barium carbonate, sodium tripolyphosphate, sodium hypophosphite, sodium bicarbonate, aluminum sulfate, sodium dichromate, zinc oxide and other production ranks first in the world; cyanogen The production of sodium, white carbon, calcium carbonate, potassium sulfate, sodium silicate and potassium carbonate ranks second in the world. Inorganic salt products have always been traditional bulk export commodities. They have been exported to more than 100 countries and regions. Each year, about 200 varieties and more than 8 million tons of products are exported, earning more than 4 billion U.S. dollars. The export volume accounts for 17% of the country's chemical exports, and foreign exchange earned accounts for 12% of the country's chemical industry.
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 areas have played an important role. The refined rate of the product is about 35%, and the inorganic salt industry not only meets 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 crystal 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 for traditional products to be surface-activated and refined, in addition to technological innovation, the key is equipment. It must not only meet the requirements of process technology, but also ensure 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 operation environment. At present, the commonly used drying equipment 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 flow drying ), Rotary Flash Dryer, Rotary Drum Dryer, Spray Dryer (also divided into Granulator, Powder, Centrifugal, Pressure Type), Vibrating Fluidized Bed Dryer, Static Vacuum Dryer, Hot Air Circulating Dryer, Oven Type , Paddle-type vacuum dryer, boiling dryer (horizontal, vertical) and so on. These drying equipments 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 develop in the direction of large-scale and large-scale production. 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, we hope 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 “dust†industrial hygiene issues 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 also has management problems. What's more important is that the tail gas after drying is not covered by dust. Recently, this industry has introduced the linen microporous PVC dust removal equipment produced by DuPont, which basically solved the problem. Therefore, the combined drying equipment should include: heat source equipment, primary and secondary drying equipment, 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 solves the problem of drying and achieves high efficiency and environmental friendliness, other types of drying problems will be solved. 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.
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 areas have played an important role. The refined rate of the product is about 35%, and the inorganic salt industry not only meets 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 crystal 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 for traditional products to be surface-activated and refined, in addition to technological innovation, the key is equipment. It must not only meet the requirements of process technology, but also ensure 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 operation environment. At present, the commonly used drying equipment 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 flow drying ), Rotary Flash Dryer, Rotary Drum Dryer, Spray Dryer (also divided into Granulator, Powder, Centrifugal, Pressure Type), Vibrating Fluidized Bed Dryer, Static Vacuum Dryer, Hot Air Circulating Dryer, Oven Type , Paddle-type vacuum dryer, boiling dryer (horizontal, vertical) and so on. These drying equipments 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 develop in the direction of large-scale and large-scale production. 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, we hope 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 “dust†industrial hygiene issues 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 also has management problems. What's more important is that the tail gas after drying is not covered by dust. Recently, this industry has introduced the linen microporous PVC dust removal equipment produced by DuPont, which basically solved the problem. Therefore, the combined drying equipment should include: heat source equipment, primary and secondary drying equipment, 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 solves the problem of drying and achieves high efficiency and environmental friendliness, other types of drying problems will be solved. 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.
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