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According to the person in charge of the Western Pacific Petrochemical Company, after the entire process of the 100,000-ton extrusion granulation unit PLC (Programmable Logic Controller) control system was updated by Da Rubber, the unit's reliability for different formulations was greatly enhanced. The failure rate can be minimized; its adaptability is greatly enhanced, and the accident source can be accurately positioned and quickly eliminated. The former domestic 200,000-ton/year plant successfully manufactured by Daxuan Plastics Co., Ltd. has been operating smoothly for more than a year at Yanshan Petrochemical, and the 100,000-ton/year polypropylene extrusion granulation unit has been delivered to Sinopec Zhongyuan Petrochemical Co., Ltd. The company, 250,000 tons/year polyethylene extrusion granulation unit is also in full swing manufacturing, China's independently designed large extrusion granulator DCS (Distribution Control System) has been verified. The automation control system has been hailed by the industry as a “brain†for major technical equipment. As a large-scale extrusion granulator for one of the three million-ton ethylene engineering power plants, the core control system for both new and old equipment has achieved “the Chinese brain. Made in China".
According to the person in charge of the large rubber and plastic company, before 2010, all domestic units of this type rely on imports. The Chinese market is mainly monopolized by three foreign manufacturers. Most of the large extrusion granulation units introduced were controlled by PLC, and a few units were controlled by DCS+ESD (Emergency Stop). After more than ten years of operation, the electrical components of the control system of the imported unit were required to be replaced at the time, but the components were no longer available for purchase, and the only spare parts import cycle was long. Once the main component has a problem, it will seriously affect the device production.
It is understood that by 2020 domestic ethylene production will reach 24 million tons, a net increase of production of 18 million tons, plus the annual transformation of ethylene companies need more than 100 sets of large extrusion granulation units. Due to the strict safety requirements of large petrochemical plants, for the sake of safety, the transformation of old equipment control systems for large extrusion granulators has not been undertaken by domestic companies. If the large-scale extrusion granulation unit production and transformation work is fully localized, it will save the country at least US$1.5 billion in funds.
Pulverizers are machines that pulverize large solid materials to the required size.
According to the size of the crushed material or the crushed material, the mill can be divided into coarse crusher, medium crusher, fine mill and superfine mill. There are four kinds of external forces applied to the solid in the grinding process: pressing, cutting, impact and grinding. Press rolling is mainly used in coarse and medium crushing, suitable for the crushing of hard materials and bulk materials. Shearing is mainly used in fine crushing, suitable for the crushing of ductile materials. Impact is mainly used in medium crushing, fine grinding, ultrafine grinding, suitable for crushing brittle materials. Grinding mainly in fine grinding, ultrafine grinding, suitable for small pieces and fine particles.
The crusher makes use of the high speed relative motion of the movable tooth plate and the fixed tooth plate, so that the crushed object can be crushed by the comprehensive action of tooth impact, friction and the impact between the materials. The crusher is suitable for crushing Chinese herbs, precious medicinal materials, ores and chemical raw materials in small batches in various varieties, alloys, metallurgy, geology, scientific research and other units.
The pulverizer machine has the advantages of simple structure, solid, stable operation and good crushing effect. The pulverized material can be discharged directly from the grinding chamber of the main machine. The particle size can be obtained by replacing the mesh screen with different aperture. The powder collecting chamber adopts the completely closed silencer structure, which can effectively reduce the working noise. In addition the machine is all stainless steel. The inner wall of the casing is machined to achieve smooth surface, which changes the phenomenon of rough inner wall and powder accumulation of the previous models, so that the production of drugs, food, chemical industry and so on is more in line with national standards and meet the requirements of GMP.
Pulverizer Machine,Crushing Machine,Milling Machine,Grinding Mill, Grinding Machine
JIANGYIN CITY XUAN TENG MACHINERY EQUIPMENT CO.,LTD , https://www.xuantengmachine.com