Chemical industrial raw materials, semi-finished products, products are mostly the viscous material powder and granular materials, thermal material, etc.. As the production process is automatized, the pneumatic conveying system with fully sealing is the most ideal material handling equipment.
The pneumatic conveying system for the chemical raw materials, you must understand the physical and chemical properties of the material to be delivered, knowing its process equipment and equipment performance before and after so that you can make sure whether the pneumatic conveying system can be used and then to determine the basic technical parameters and system arrangement.
The pneumatic conveying system has many advantages applied in the chemical industry. The production of continuous performance to simplify the management of auxiliary equipment, pipeline layout flexibility for arbitrary configuration of each device to prevent impurities mixed and scattered; it can achieve a variety of technological requirements, such as mixing, grading, cooling and dust removal, etc.;It won't take up a large amount of workshop area and space; Realize the centralized automatic control, monitoring, inspection, etc in the production process.
The problems must be paid attention to of the chemical materials pneumatic conveying system:
1) Prevent crushing, wear and deformation during the material conveying process. The pneumatic conveying system selection should uses the low voltage, low dense phase conveying to ensure the material's usage performance.
2) Guarantee the security of flammable and explosive material conveying. You can use the inert gas delivery cycles. For strong hygroscopic material,you can use the frozen type dryer and air filter, air source should be used after processed.
3)With static materials and chemicals, during the installation you should pay attention to each component of a pneumatic conveying system.The transporting pipe, hopper, dust catcher, etc must be grounded.The dust filter material are of anti-static material and the corresponding measures should be taken.
4) Prevent impurities polluted materials mixed into pneumatic conveying system. We request for air purification.The water, oil, dust content in the compressed air must be controlled in a certain range.
5) Prevent rust and iron mixed in. In the material inlet, we will install the magnetic iron remover. Transporting pipe is made of stainless steel or aluminum tube, under the condition of process£¬the ordinary steel tube surface must do the derusting treatment.
When designing the pneumatic ash handling system, first, to ensure that it can finish the expected delivery tasks, at the same time, reasonably determine the type and capacity of equipment, and the problems related to this, the design, we cannot only look at the cost of equipment, but more importantly to consider the nature of the material influence on the quality, considering the transportation distance, transportation route, and the difficulty and cost of the operation management, etc.. For example, for some materials, all kinds of equipments are suitable for the condition of pneumatic conveying system, but due to the material contains a lot of water, with the adhesive and other reasons, we can't adopt the pneumatic conveying system, even if the mechanical conveying equipment cost a lot, we also should select the mechanical transmission mode.There has a same situation, that is when conveying some certain materials, for example, when deliver the limestone powder to the the storage bin before to the circulating fluidized bed boiler furnace, using the pneumatic conveying system needs big power.At first glance the operating cost is higher, but if you look from the rationality of the system or the production technology, the pneumatic conveying is better.
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