Technician's personal work summary

Since August 1999, I have been awarded the title of technician by the company until now, and it has been four years. During these four years, I have been working in the Department of Operations. With my own efforts and leadership, I was promoted from a chief duty officer to a shift supervisor, and then promoted to the department assistant position. During this period, I had a deeper understanding and understanding of the systems of our company's first stop, and had some independent analysis and processing capabilities for various types of accidents that occurred in the system, and fulfilled the duties of a technician.

My major in school is thermal engineering and automation control, but the most important thing we need to do in our first station operation is the knowledge of heat engine and electrical. This is a new challenge for me. It also requires continuous learning and improvement, so that my professional skills can be fully developed. Therefore, I have found some professional books on these aspects, targeted learning for our system, and also asked some masters and professionals to ask them to preach. After my own efforts and the help of my colleagues, I finally worked hard and my professional knowledge and professional skills have been greatly improved.

But I still pay special attention to our system's knowledge about thermal engineering, and go deep into understanding and mastering it. At the same time, while studying by myself, he also assumes the responsibility of teaching to other operators. Our company's hot water network project is a comprehensive monitoring of the data of the hot water network production and operation using the computer monitoring system. Its main components include controllers, input and output modules, and monitoring stations. The first station of our company has 18 sets of Honeywell's scan3000/s9000 distributed control system. It has hot water network running loop control, data acquisition, data communication, centralized information management and operation display function. It is equipped with two s9000 controllers and 12 single-loop controllers as redundant controllers and emergency communicators for the control loop. The udc acts as a backup communicator to control the regulation loop in the event of a dcs failure. It is easy to operate, programmable and highly stable. The bumpless switching between the dcs system and the udc ensures the stability of the system operation. The s9000 controller communicates with the single-loop controller through the dmc communication loop of the dvc communication port; and connects the communication card of the system monitoring station through the mgtsta communication port. With these control systems, the adjustment of various parameters and the labor of personnel can have a multiplier effect. These control systems are composed of measuring elements, control elements, and actuators. The control flow is like this. On-site meter acquisition data, the transmitter sends 4-20ma signal to s9000, 1-5v signal to udc. The 4-20ma signal is then sent by the s9000 or udc to the actuator for adjustment. In this process, the power supply of the instrument is provided by two Siemens 24v DC power supplies, the power is sent to the distributor, and then the power is supplied to the instrument by the distributor. The signal received by dcs or udc is displayed on the built-in screen of crt or udc. During control, dcs or udc sends a signal to the impedance converter and the distributor, and transmits it to the actuator through the isolation module or the isolation relay for control. The isolation module is connected to the analog signal, that is, the continuous control signal 4-20ma, such as valve opening degree, liquid level control, etc.; and the isolation relay is to feedback the switching signal to dcs, such as temperature switch, pressure switch and pump Start and stop status, etc.

During the shift operation, as a shift supervisor, I bear the heavy responsibility of the safe and economic operation of the entire hot water network. During the work, the spirit is highly concentrated, leading the team members to carefully adjust the parameters, carefully analyze the data, summarize the rules, and find in time. Discover equipment defects and hidden dangers to prevent accidents from expanding. Not only ensured the safe operation of the hot water network, but also achieved economic operation. In the case of some parameters and equipment anomalies, it is possible to analyze in time, find out the causes and report, and has certain independent analysis capabilities. During regular work, I often study various professional knowledge and operating procedures, and often make various accidents in my mind. When various accidents occur at the first station, they can be processed and dispatched accurately and decisively, and the normal operation of the system can be quickly restored. During the work of the operation department office, I not only undertake the daily management and logistics work of the operation department, but also undertake the safety and economic operation of the auxiliary operation personnel. Work with the department leaders to make economic analysis and load forecasting of various data, participate in the analysis and processing of various accidents, and technical transformation of the system. For example, the first station crt shows that the return pressure of the big net is often increased when the flow is large during the daytime. It needs to be drained frequently. After several days of observation and statistics, there is this phenomenon. There is no problem in the first station. The analysis may be that there is a user station. Leakage point, the pressure during the daytime is greater than the pressure of our pipe network and leaks to our pipe network. In case of the above types of problems, we will contact the relevant departments to solve the problems after the statistical analysis, and provide first-hand information for other departments to better deal with the problems. Once, I was on duty, the electrical system Jiajia line was running, the large network flow was about 480 tons, and two temporary pumps were running. At this time, the two pumps could not meet the load requirements, and the 1# temporary pump needed to be switched to the 4# temporary pump. run. After the 4# temporary pump insulation test passed, the pump was started. At this time, the first station suddenly stopped power supply, all equipment was stopped, and the electrical system was automatically put into the Tangmen line. At this point, as the shift monitor, I immediately shut the steam regulator to zero, and at the same time ordered the deputy to return to the plant to resume the 1# and 2# temporary pumps, and the main attendant resumed the steam system and adjusted the flow. Then I went to the electrical control room to check, first cancel the alarm ringtone, and then reset each switch. At this point, the drop indicator light is still on, I went to check the relays and found that the 1dl overcurrent relay was activated. After resetting it, the indicator light went out. This can be judged not because of the Jiajia line, but because of the start of the 4# temporary pump. Then why does this happen when the 4# temporary pump is started? Later, I went to the site to inspect. After preliminary analysis, I came to the conclusion that there is high heat and charring at the fault, which can be judged that the three-phase current imbalance of the motor may be caused by the short circuit between the motors, so that when the motor starts The current value is large, causing an overcurrent phenomenon. When our cooling water system is running, the cooling water pipes often vibrate violently. After analysis and exploration by my department leaders, I finally solved this problem. The liquid level of the cooling water tower pool must be higher than the cooling water outlet pipe to avoid the air in the pipe entering the pipe and causing the pipe to vibrate. In addition, I also participated in the processing of the control valve cassette, the input of the automatic control loop, the parameter setting, the large-network segment isolation analysis to find the leak point and so on. In particular, some of the failures of lithium bromide have been handled independently. Whenever there is a fault, I go to the site to analyze the cause and process it independently, and most of the faults can be quickly resolved. Such as: lithium bromide unit failure shutdown, by

The investigation is caused by the high voltage and high temperature of the generator, and the high voltage and high temperature of the generator are caused by many factors. At this point, I check the relevant system of the unit and check the operating parameters before the shutdown, find the cause, and then carry out targeted processing. If it is caused by poor sealing of the unit and air leakage, I will start the vacuum pump to remove the non-condensable gas and eliminate the leakage point. If the temperature of the cooling water is too high or the flow rate is too small, I will check the cooling. The water system adjusts the number of fans and adjusts the amount of cooling water to meet the requirements.

In short, during these four years, I have greatly improved both in terms of technology and management. In the future, on the basis of this, I will study hard and make persistent efforts to make my business level even higher and contribute to the development of the company.