Xishui Technology Co., Ltd. is a 100-year-old cement factory that produces a variety of ordinary Portland cement. After the transformation of the old factory in 1994, a 300t/d old production line still remains.
The control of the cement plant's production line mainly adopts on-site control, and is equipped with a large number of secondary instruments to display and monitor temperature, pressure, flow, speed, and other process parameters. There are Type II instruments and Type III instruments in these instruments. Memory function, for some important process parameters, can only be recorded by inspection, lack of specifications, data is not accurate. Most of these meters do not have a memory function. Some meters with a memory function are mostly paper recorders. A paper recorder not only needs frequent paper changes, but also has trouble when inquiring about some necessary data.
In order to better manage this production line, it is necessary to save key data into the file and hope to be able to query the production data through the computer network and keep abreast of the production status. After a comprehensive comparison of performance to price for a variety of paperless recorders, the company finally selected a paperless recorder.
The solution is as follows:
First, the paperless recorder is installed in the duty room, and the detected data result is displayed in real time on the liquid crystal display in numerical manner or in various curves. There are four kinds of display screens in the scene, of which the main screen can display the eight parameters detected at the same time. The kiln-headed pyrotechnics can timely adjust the kiln's operation status according to the main screen display results and their own observational experience for many years. If the temperature of the smoke chamber detected on the main screen is too high or too low, the speed of the pulverizer should be timely adjusted to adjust the size of the coal feed to ensure the production of good quality, high yield and low consumption of clinker.
The calcination of clinker is a central part of the cement production process, and the main thermal parameters in the clinker calcining system must be examined in detail. Our company used a paperless recorder to check the temperature of the smoke chamber of the cement kiln, four parameters of the speed of the coal feeder, the speed of the kiln draft fan, and the gas flow of the waste heat furnace. The detection and reasonable control of the above parameters are of crucial importance for safe and stable production and guaranteeing the quality of clinker. The voltage signal (mV) generated after thermocouple detection in the kiln chamber temperature chamber can be directly input into the channel of the recorder; the signal of the feeder speed, kiln draft fan speed, and gas flow rate of the waste heat furnace is transmitted. The device has a two-wire system and a four-wire system, and does not require any conversion. The recorder has a corresponding wiring method. The range of compatible signals is relatively large. Paperless recorders have a wide range of applications, among which are many applications in chemical plants. As we all know, chemical plants are often accompanied by a variety of flammable and explosive chemical gases and steam. Then, if an ordinary paperless recorder is used, it will be very unsafe and can easily cause environmental gas explosions. Therefore, a flameproof paperless recorder must be used as a temperature sensor in these locations. The explosion-proof paperless recorder manufactured by Keyou is suitable for the presence of flammable and explosive compounds at the consumer site. It is necessary to measure multiple locations or locations at the same time. Measurements; suitable for use in explosive gas risk areas within the dIICT6 temperature range. It is commonly used in the installation of petrochemical distillation towers.
Industrial flameproof paperless recorder is a kind of temperature sensor detection device, which is widely used in the chemical industrial automation system. Through the temperature sensor, the temperature parameters of the control object can be converted into electrical signals, transmitted to the show, record and conditioning. Instrument to implement detection, conditioning and control of the system.
The next connection to the paperless recorder comes with a software package that comes with the company's paperless recorder for U disk data acquisition and analysis. The data stored in the KH300R paperless recorder is read into the computer and automatically converted into the Acess database file. The software is equipped with data acquisition and analysis functions for management operations.
The distance between the kiln duty room and the production office is about 100 meters. We have chosen an active RS-232/485 converter. This will establish a communication between the paperless recorder and the statistical computer in the production office. The computer has been connected to our factory's local area network. Production data can be read once per class (or even shorter), and company leaders will be able to keep abreast of the old line's production information through the LAN. Our model has 256M U disk storage capacity, because the read frequency, the data collection set time interval can be appropriately shortened, so that more detailed production data, more able to reflect the actual production.
The paperless recorder detects the on-site data and alarms according to the user's own setting range. The result of the inspection is real and reliable, which provides timely and reliable information and basis for the kiln to see that the kiln is always in a good operating state. The effect of using a closed-loop control system can be achieved. After nearly two years of use, its advantages and effects are as follows:
(1) The control of the kiln smoke chamber is stable and well documented, basically eliminating high temperature operation. Before installing the recorder, the temperature of the smoke room during the shift is extremely high and the responsibility is unclear. After installing the recorder, the temperature of the smoke room during the shift can be accurately determined to provide basis for the assessment; and the temperature control of the smoke chamber is also accurate. The data has ensured the effective implementation of the process system and greatly reduced the ringing phenomenon.
(2) It has effectively supervised the control of the kiln exhaust fan speed. The number of fan rotations directly controls the amount of ventilation in the kiln. Before the recorder is installed, there is no effective monitoring means for negative pressure control. After the recorder is installed, the speed of the exhaust fan can be effectively monitored, which plays a positive role in the stable operation of the rotary kiln.
(3) Monitoring the speed of the feeder. In order to ensure the stability of the smoke chamber temperature, it is necessary to adjust the speed of the coal feeder in time. Since the use of a recorder, the rotation speed can correspond to the kiln temperature and the pulverized coal combustion can be obtained.
(4) Detection of gas flow in waste heat furnace. Before installing the recorder, some see the pyrotechnics change the metering sensor by artificial means, resulting in false high yield. In order to prevent this from happening, the gas flow in the waste heat furnace needs to be detected. By comparing the curves, it is possible to locate the false high production time.
to sum up:
After nearly three years of use, we believe that the temperature recorder's measurement accuracy, display readings, and data records are all satisfactory and basically reach a maintenance-free state. In addition, because the paperless recorder adopts advanced microcomputer technology, it achieves all-round analog input, small size, low power consumption, wide versatility, strong independence, vivid colors, intuitive readings, sensitive and reliable data, and data saving. The recall is very convenient, and it is a good device integrating measurement and management. Therefore, we believe that the recorder can be used not only for rotary kiln but also for testing of other equipment parameters of cement companies, and also for other industries. .
Xiamen Branch Automation Automation Co., Ltd. 2013-02-01
The control of the cement plant's production line mainly adopts on-site control, and is equipped with a large number of secondary instruments to display and monitor temperature, pressure, flow, speed, and other process parameters. There are Type II instruments and Type III instruments in these instruments. Memory function, for some important process parameters, can only be recorded by inspection, lack of specifications, data is not accurate. Most of these meters do not have a memory function. Some meters with a memory function are mostly paper recorders. A paper recorder not only needs frequent paper changes, but also has trouble when inquiring about some necessary data.
In order to better manage this production line, it is necessary to save key data into the file and hope to be able to query the production data through the computer network and keep abreast of the production status. After a comprehensive comparison of performance to price for a variety of paperless recorders, the company finally selected a paperless recorder.
The solution is as follows:
First, the paperless recorder is installed in the duty room, and the detected data result is displayed in real time on the liquid crystal display in numerical manner or in various curves. There are four kinds of display screens in the scene, of which the main screen can display the eight parameters detected at the same time. The kiln-headed pyrotechnics can timely adjust the kiln's operation status according to the main screen display results and their own observational experience for many years. If the temperature of the smoke chamber detected on the main screen is too high or too low, the speed of the pulverizer should be timely adjusted to adjust the size of the coal feed to ensure the production of good quality, high yield and low consumption of clinker.
The calcination of clinker is a central part of the cement production process, and the main thermal parameters in the clinker calcining system must be examined in detail. Our company used a paperless recorder to check the temperature of the smoke chamber of the cement kiln, four parameters of the speed of the coal feeder, the speed of the kiln draft fan, and the gas flow of the waste heat furnace. The detection and reasonable control of the above parameters are of crucial importance for safe and stable production and guaranteeing the quality of clinker. The voltage signal (mV) generated after thermocouple detection in the kiln chamber temperature chamber can be directly input into the channel of the recorder; the signal of the feeder speed, kiln draft fan speed, and gas flow rate of the waste heat furnace is transmitted. The device has a two-wire system and a four-wire system, and does not require any conversion. The recorder has a corresponding wiring method. The range of compatible signals is relatively large. Paperless recorders have a wide range of applications, among which are many applications in chemical plants. As we all know, chemical plants are often accompanied by a variety of flammable and explosive chemical gases and steam. Then, if an ordinary paperless recorder is used, it will be very unsafe and can easily cause environmental gas explosions. Therefore, a flameproof paperless recorder must be used as a temperature sensor in these locations. The explosion-proof paperless recorder manufactured by Keyou is suitable for the presence of flammable and explosive compounds at the consumer site. It is necessary to measure multiple locations or locations at the same time. Measurements; suitable for use in explosive gas risk areas within the dIICT6 temperature range. It is commonly used in the installation of petrochemical distillation towers.
Industrial flameproof paperless recorder is a kind of temperature sensor detection device, which is widely used in the chemical industrial automation system. Through the temperature sensor, the temperature parameters of the control object can be converted into electrical signals, transmitted to the show, record and conditioning. Instrument to implement detection, conditioning and control of the system.
The next connection to the paperless recorder comes with a software package that comes with the company's paperless recorder for U disk data acquisition and analysis. The data stored in the KH300R paperless recorder is read into the computer and automatically converted into the Acess database file. The software is equipped with data acquisition and analysis functions for management operations.
The distance between the kiln duty room and the production office is about 100 meters. We have chosen an active RS-232/485 converter. This will establish a communication between the paperless recorder and the statistical computer in the production office. The computer has been connected to our factory's local area network. Production data can be read once per class (or even shorter), and company leaders will be able to keep abreast of the old line's production information through the LAN. Our model has 256M U disk storage capacity, because the read frequency, the data collection set time interval can be appropriately shortened, so that more detailed production data, more able to reflect the actual production.
The paperless recorder detects the on-site data and alarms according to the user's own setting range. The result of the inspection is real and reliable, which provides timely and reliable information and basis for the kiln to see that the kiln is always in a good operating state. The effect of using a closed-loop control system can be achieved. After nearly two years of use, its advantages and effects are as follows:
(1) The control of the kiln smoke chamber is stable and well documented, basically eliminating high temperature operation. Before installing the recorder, the temperature of the smoke room during the shift is extremely high and the responsibility is unclear. After installing the recorder, the temperature of the smoke room during the shift can be accurately determined to provide basis for the assessment; and the temperature control of the smoke chamber is also accurate. The data has ensured the effective implementation of the process system and greatly reduced the ringing phenomenon.
(2) It has effectively supervised the control of the kiln exhaust fan speed. The number of fan rotations directly controls the amount of ventilation in the kiln. Before the recorder is installed, there is no effective monitoring means for negative pressure control. After the recorder is installed, the speed of the exhaust fan can be effectively monitored, which plays a positive role in the stable operation of the rotary kiln.
(3) Monitoring the speed of the feeder. In order to ensure the stability of the smoke chamber temperature, it is necessary to adjust the speed of the coal feeder in time. Since the use of a recorder, the rotation speed can correspond to the kiln temperature and the pulverized coal combustion can be obtained.
(4) Detection of gas flow in waste heat furnace. Before installing the recorder, some see the pyrotechnics change the metering sensor by artificial means, resulting in false high yield. In order to prevent this from happening, the gas flow in the waste heat furnace needs to be detected. By comparing the curves, it is possible to locate the false high production time.
to sum up:
After nearly three years of use, we believe that the temperature recorder's measurement accuracy, display readings, and data records are all satisfactory and basically reach a maintenance-free state. In addition, because the paperless recorder adopts advanced microcomputer technology, it achieves all-round analog input, small size, low power consumption, wide versatility, strong independence, vivid colors, intuitive readings, sensitive and reliable data, and data saving. The recall is very convenient, and it is a good device integrating measurement and management. Therefore, we believe that the recorder can be used not only for rotary kiln but also for testing of other equipment parameters of cement companies, and also for other industries. .
Xiamen Branch Automation Automation Co., Ltd. 2013-02-01