Drying equipment plays an important role in the pharmaceutical production process, and spray drying is the most widely used process in the liquid process forming and drying industry. It is suitable for the production of powders and granules from solutions, emulsions, suspensions and pasty liquid raw materials. Solid product. Spray drying is a very desirable process when the finished product particle size distribution, residual moisture content, bulk density, and particle shape must meet exacting standards.
The drying speed is fast, and the surface area of â€‹â€‹the feed liquid after atomization is greatly increased. In the hot air flow, 95%-98% of water can be evaporated instantaneously, and the drying time is only a few seconds. It is particularly suitable for the drying of heat-sensitive materials. And the product has good uniformity, fluidity and solubility, the product has high purity and good quality. The production process is simplified and the operation and control are convenient. For liquids with a moisture content of 40-60% (up to 90% of special materials), the liquid can be dried into powder products at one time, without crushing and screening after drying, reducing the production process and increasing the product purity. The product particle size, bulk density and moisture content can be adjusted within a certain range by changing the operating conditions, and the control and management are very convenient.
The author was informed that the LPG series high-speed centrifugal spray dryer developed and produced by Changzhou Rongfa Drying Equipment Co., Ltd. is a special drying equipment suitable for the drying of liquids such as emulsions, suspensions, pastes, and solutions. In polymers and resins; dyes, pigments; ceramics, glass; rust remover, insecticides; carbohydrates, dairy products; detergents and surfactants; fertilizers; organic compounds, inorganic compounds, liquid materials The dryness is particularly good.
The air passes through the filter and the heater and enters the air distributor at the top of the dryer. The hot air spirally enters into a dry state. The feed liquid is pumped from the feed tank through the filter to the centrifugal atomizer at the top of the dryer, so that the feed liquid is sprayed into droplets of small objects. The feed liquid and the hot air are in contact with each other, and the water quickly evaporates. Dry to finished product in a short period of time. The finished product is discharged from the bottom of the drying tower and the cyclone separator, and the exhaust gas is extracted and discharged by the fan.
The drying speed of the machine is fast, generally only 5-15 seconds, with the characteristics of instantaneous drying; the material completes the drying process in a short time, adapts to the heat-sensitive material drying, can maintain the material color, aroma, taste; the production process is simplified, the operation and control is convenient, Suitable for continuous control of production; product dispersion, fluidity, good solubility.
In the past two years, the development of spray dryers is getting better and better. Spray dryers have become more and more widely used in the machinery market, and the market demand is also growing. Spray dryers are widely used in food, pharmaceutical, chemical and other industries. At the same time, with the continuous improvement of industrial production technology and consumer requirements, people have also put forward higher technical requirements for spray drying equipment.
Drying equipment services The salient feature of the pharmaceutical chemical industry is the increasing role of technological content. This is very different from selling products in the past mainly by price competition. Among them, some manufacturers of high-tech drying equipment, focusing on the development of new products, the benefits are increasing; on the contrary, some products with low technological content, new products and new technology development capacity of weak enterprises, the efficiency began to decline.
The market reaction shows that the pharmaceutical and chemical industry expects the dry equipment manufacturing industry to adjust its product structure in accordance with the requirements of high quality, low energy consumption, and environmental protection, further strengthen basic research, and solidify the foundation for applied research and development. In terms of technology, research on automation, testing, manufacturing processes, material design, and other aspects of materials has been strengthened. In terms of applied research and development, it is necessary to focus on international exchanges and cooperation, but also on the protection of intellectual property rights; it is necessary to pay attention to the development of new technologies and new applications, but also to focus on innovation and innovation in traditional processes and traditional applications.
After years of development, at present, China's drying equipment industry has begun to enter a more mature stage, can better meet the actual needs of users in various fields. As far as the current domestic market is concerned, although low-cost spray dryers flood the market, with the long-term well-being of the national economy and the constant changes in user demand, peopleâ€™s value orientation will shift, and the cost-effectiveness and output ratio will replace the current situation. Than the price of practice.
Cooling tower spray nozzles are designed for optimum coverage of either the fill or coil surface. Optimum coverage increases thermal efficiency while fully wetting the surface. This in turn prevents scale build-up that will lessen the unit capacity. There are several designs for pressurized and gravity-feed systems, each fully optimized for the application. Regardless of design, nozzles are easily removed, either to accommodate new flow rates or to replace broken nozzles. To facilitate cleaning or replacement; counterflow nozzles are installed using grommets which also allows the nozzles to be properly positioned. Kits are available, complete with insert grommets for pressurized systems or installation tools for gravity systems.
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