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How to achieve stable operation of automatic batching system
2022.01.17The automatic batching system has become a necessary equipment for the intelligent management of the whole plant. It replaces the traditional manual batching, solves the problems of slow batching and poor accuracy, and greatly improves the production efficiency. How to judge the quality of the batching system mainly depends on the stability of the long-term operation of the system. The stable operation of the batching system mainly depends on two parts: the control system and the weighing mechanical equipment.
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The control part of automatic batching is the system software, which is the preliminary designer's full investigation of the production process, as well as the prediction of various emergencies that will occur in the process of use, to write a simple and rationalized program. And through the dynamic picture, the actual data is transmitted to the industrial control computer in real time to ensure the reliable operation of the system, and complete the material feeding, conveying, unloading, mixing and other processes. The industrial control function with a well-designed program can precisely control the speed of the motor. When the blanking does not reach the set value, high-speed blanking is used. When it is close to the system required value, the PLC jog control mode is used to blank the material. When the batching value is slowly reached, The motor stops turning.
Only reliable software is not enough, the stability of mechanical execution components is also very important, we choose brand components: Siemens PLC, METTLER TOLEDO load cells, etc. For the entire PLC control cabinet, our Rongxin design department completes the drawings and completes the cabinet configuration in the engineering department; in addition, the mechanical part of the whole system is independently completed by the Rongxin workshop, and is responsible for on-site installation; reduce intermediate links and reduce error rates .
Hardware and software complement each other. The optimization of software and the reliability of hardware operation ensure the long-term operation stability of the batching system on site, and realize automatic all-day uninterrupted production. -
Different states of materials with different pressures during pneumatic conveying operation will cause different phenomena
2021.12.16The state of the pneumatic conveying system refers to the movement form of the material changing in the pipeline with the change of the air volume when the gas-solid two-phase flow moves. When the wind speed is higher than the material stop speed, the material is suspended in the air and evenly distributed according to the airflow. The wind speed begins to drop and the material begins to sink and agglomerate. When the airflow is further reduced, the material aggregates into agglomerates in the pipe, showing a state of group pulsation. If the wind speed continues to be reduced, the bulk material will block the pipe section, forming an unstable plug that begins to be transported under the pressure of the air. It is believed that reducing the wind speed, the material becomes a stable plug, propelling the transport under the pressure of the air. If you continue to reduce the wind speed, when the pressure exceeds the rated pressure of the air source, the phenomenon of blocking the pipeline will occur.
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The choice of transportation type is related to the characteristics of the material, transportation distance and other parameters. It is suggested that the delivery method can be selected according to the actual situation on site.
The material conveying speed is higher than the suspension speed, the material moves from the pipeline to the suspended state, and the concentration is relatively low. This mode of transportation is suitable for low-pressure and thin-phase transportation.
The material transportation speed is similar to the suspension speed, and the material is dense in the pipeline with moderate concentration, which is suitable for long-distance transportation. This transportation state includes high pressure pressure, high vacuum transportation, and fluidized transportation.
The material transportation speed is lower than the stop speed, the material is cut into the bolt shape by the air pressure in the pipeline, and the air pressure before and after the embolization is used to advance with thrust, and the concentration ratio is high. This method is suitable for long-distance low-speed transportation.
What are the advantages of pneumatic conveying
1. Bulk material transportation, reduce the cost of packaging and loading and unloading transportation, and reduce the cost
2. The conveyed material is not affected by the weather and the surrounding conditions of the pipeline layout, and the production site layout is relatively easy.
3. Various technological operations such as mixing and crushing, grading, dehumidification and drying, cooling and dust removal and some chemical reactions can be carried out during transportation.
4. Completely closed pipeline transportation, no dust flying, no leakage, good environmental sanitation conditions, can avoid material return, pollution or other sundries, thus ensuring the quality of transportation materials.
5. The equipment is simple, the water delivery pipeline is flexibly arranged, the water delivery facilities are long, the floor area is small, and the space can even be fully utilized, and the investment and maintenance costs of the equipment are low.
6. The throughput is not limited in size, requires less operators, is easy to maintain, and realizes unattended complete automation, thereby reducing labor costs and having a high degree of automation. The structure is simple, the throughput is large, and the use site is not occupied. -
Powder delivery is classified according to the mass of powder carried per unit volume of gas
2021.12.16The powder conveying system is a conveying technology that uses the energy of air to continuously convey powder and granular materials. Widely used in steel, chemical, metallurgy and other industries. The conveying method of the powder conveying system: according to the quality of the powder carried by the gas carrier per unit volume, it can be divided into dilute phase pneumatic conveying and dense phase pneumatic conveying, and dense phase pneumatic conveying can be divided into dense phase dynamic pneumatic conveying and dense phase static pneumatic conveying delivery. According to the conveying method, it can be divided into: suction and pressure conveying.
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Flexible layout and easy installation; materials are transported by closed pipelines, no dust leakage, environmental protection and no pollution; simple, no dust flying, and materials can be taken from multiple points at the same time. The working pressure is low (less than 0.1mpa), but the conveying distance is short, and the sealing requirements of the gas-solid separator are strict.
During the conveying process, various processes such as mixing, batching, grading, packaging, and dust removal can be realized at the same time. Avoid contact with moisture, dirt and other sundries, avoid manual intervention, and ensure product quality; for inflammable and explosive items, special protective gas can be used for closed circulation transportation to improve system safety; reduce packaging and handling costs;
Intermittent or continuous conveying, multi-point feeding, multi-point unloading, flexible scheme, wide selection range; few moving parts, easy maintenance, reliable use process; high degree of automation, suitable for continuous production process. According to the conveying method, it can be divided into: suction and pressure conveying. -
Pneumatic conveying has also gained market acceptance in handling solid waste
2021.12.16There are many types of solid waste, so the treatment methods are different. With the development of science and technology, the treatment technology of solid waste has also been greatly improved. The treatment of solid waste is generally carried out by means of pneumatic conveying equipment. However, in general, solid waste treatment technologies can be divided into three categories: physical and chemical biological methods. Physical methods use the physical or physicochemical properties of solid waste to sort out useful substances and separate harmful substances. .
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