px919557
Joined: 29 Jul 2010
Posts: 236
Read: 0 topics
Warns: 0/5
Location: qefrqn
|
 Posted: Fri 23:17, 31 Dec 2010 Post subject: ugg botas Shandong Donghua Cement II 5000t d clin |
|
|
Shandong Donghua Cement II 5000t / d clinker production line DCS System
In my company introduce two typical examples of the regulatory function of PID (1) raw material were measured at the kiln control loop: a project we are using the PID controller that comes with the feed scale, expensive, control is not stability. Phase II is from the software we use on the PID regulator control, so as to reduce equipment costs, but also improves quality control. The control loop controlled variable is the feed rate measurement scale, adjust the parameter is the flow valve opening. Measurement scale based on the amount of set up automatic control of feed material of the valve opening size. To ensure the stability of the kiln feed, clinker production and ensure quality. (2) cooler grate speed control: Automatic control speed on the stability of the grate grate plate material thickness, the production conditions and safe operation of equipment are necessary. According to the theory and lessons learned derived from the pressure,[link widoczny dla zalogowanych], speed, the relationship between material thickness, set the grate cooler in a room under the pressure of the best control point, the computer speed automatic control cabinet, adjust the speed of the first paragraph of grid plate, the second section will be a certain percentage of grate speed automatic tracking first grate speed. Using this control scheme, even though the clinker cooler into the amount and particle composition changes, but speed is still coordinated Sec grate, grate bed material gradually decreasing thickness and maintain a certain relationship is conducive to grate on the bed of clinker delivery and cooling. 2.2PROFIBUSS bus communication ATOX50 raw material mill practical application of 167 communication points, including 55 hydraulic, gear 50, roller lubrication 62: Cooler 85 is a communication point. A project using the conventional point to point communications,[link widoczny dla zalogowanych], DCS system to increase the number of I / O modules,[link widoczny dla zalogowanych], increasing the number of cables installed, increasing the workload of the software programming, but only partial information will be sent to the DCS system. The second phase we switched to bus communication means to communicate all of the above points in a DP through the FW239 bus card into the ECS100 control system, and then collected in control, and make the appropriate flow chart picture, the various field devices Information status and alarm signals to the operator visual display, there were unusual conditions can be timely to remind the operator to deal effectively prevent small problems from big not to notice result in downtime, affecting production; and failure in the The information will be accurately displayed by failure, greatly reducing the analysis to determine the time of failure, but also greatly reducing the field I / 0 card parts of the channel and maintenance costs. My factory installed preheater tower 48 PROFIBUSS-PA temperature and pressure instrumentation, temperature instrumentation 2l units which, using the Siemens TH400; pressure gauge 27 units, using ABB2600T: PA instrument and the linker through the coupler DCS Systems FW239 with a DP communication module, for supporting the Siemens coupler with a maximum of 25 bus instrument. Linker of a Siemens 244 communication up to 244 input bytes and output bytes,[link widoczny dla zalogowanych], we are now only 244 Siemens linker input bytes: The above parameters can be seen by a linker can take 48 PA instrument traffic and SyCon software can also configure a Siemens linker 48 meters. But Siemens, a linker, as FW239 DP with a DP under the module from the station, in the configuration software can only be within a DP slave with 6O a SLOT. A total of 30 instruments used. Therefore, a connector can only be the largest PA with 30 meters, so the use of two PA bus. I plant a PA instrument bus, which saves installation costs. Instruments also significantly reduces the workload of maintenance personnel. 3 Conclusion Donghua Cement ECS used in the second phase of a 100DCS system is powerful, better system stability. The entire production process to achieve optimal control and safe operation. The system has good man-machine interface, open interfaces, easy maintenance,[link widoczny dla zalogowanych], cement manufacturing process to meet the special control module can be a good cement production process a variety of special requirements. But compared with foreign advanced systems, the system hardware not compact. Too many field station control cabinet, requiring larger control room. Programming configuration software, there are some areas for improvement, I believe in the future applications of the system will be more perfect. ��Author�� Guobi Jun (1978), female, undergraduate, Shandong Donghua Cement Co., Ltd. DCS software engineers. Dingsu Bo (1980 -), male, undergraduate, Shandong Donghua Cement Co., Ltd. DCS software engineers. Cao Fei (1983 a), female, undergraduate, Shandong Donghua Cement Co., Ltd. DCS software engineer. Workers seeking i7l Xinjiang
More articles related to topics：
ghd nederland Study of the causes yellowing of tex
ugg boots günstig China's toothpaste industry is
[link widoczny dla zalogowanych]
The post has been approved 0 times
|
|
