KR20110125014A - System for fire monitering inner the coal pulverizer - Google Patents

Abstract

PURPOSE: A coal crushing pulverizer and a fire monitoring system are provided to receive a monitored value through a network, thereby monitoring a current state of each pulverizer through a screen. CONSTITUTION: A plurality of pulverizers(111-116) is used for coal crushing and coal supplying to a boiler of a thermal power plant. A temperature sensor(121) senses the temperature of an exit of each pulverizer. A charge coupled device(CCD) sensor(122) senses sparks within the pulverizer. An infrared and ultraviolet ray detection sensor(123) monitors fire within the pulverizer. A temperature data transmission part transmits an establishment address of corresponding pulverizer and each temperature sensor of the pulverizer through a network. A video server transmits inputted video data from the CCD sensor of each pulverizer and the address of the corresponding pulverizer through the network. A main processor transmits the address of the corresponding pulverizer and inputted data from each infrared and ultraviolet ray detection sensor through the network. A central control server outputs the temperature of the pulverizer exit, video data in the pulverizer, and infrared and ultraviolet ray detection data to a screen. The central control server displays an alarm screen through an HMI(Halogen Metal Iodide) screen.

Description

Coal Pulverizer Fire Monitoring System {System for Fire Monitering inner the Coal Pulverizer}

The present invention relates to a fire control device for a differentiator, and to determine whether an alarm is detected based on data input through an internal temperature of a differentiator, a charge coupled device (CCD) image, infrared (IR) and ultraviolet (UV) sensors. A fire monitoring system of a pulverizer for coal grinding is provided.

As is well known, coal-fired power plants are mainly used to generate steam using coal-fired fuel sources such as coal (grenade coal, sub-bituminous coal) and diesel fuel to generate steam and to rotate turbines and produce electricity from the generators connected to these shafts. Say.

Among the above fuel sources, in particular, a coal-fired power plant using coal as a main fuel source is provided with a pulverized coal for pulverizing coal for burning the coal in a boiler, that is, coal having a large particle size.

1 is a view illustrating the coal grinding mill 10 for coal-pulverizing a coal-fired power plant. As shown in FIG. 1, the conventional grinding mill 10 is formed with an inlet 15 for introducing coal thereon. In the lower part, the coal pulverized by the crushing table 21 and the crushing roller 23 to which the introduced coal is crushed, that is, pulverized pulverized coal and coal crushed to 200 mesh size, respectively A main body 17 having a classifier 14 for determining a particle size to be dischargeable and four outlets 13 partitioned for supply to a boiler, and a grinding table 21 at the bottom of the main body. Driving)

Is a grinding table 21 rotatably provided in response to the drive of the motor connecting gear 19, and three hydraulic grinding tools provided for grinding (grinding) coal supplied in interaction with the grinding table 21. In addition to the roller 23 and the inlet portion 15 of the main body portion 14, the pulverized coal is fed together with the transfer air to supply the pulverized pulverized coal to the boiler. Coal is supplied to the boiler in conjunction with the coal supply means 25 is provided with a damper (not shown) for adjusting and the coal supply means 25 installed in conjunction with the inlet portion 15 of the body portion 17 It is equipped to increase the boiler combustion efficiency when burning in this large boiler, and to extinguish fire in case of fire in the main body of the branched body 17, extinguishing carbon dioxide supply (not shown), digestion water supply unit (not shown), and removal of internal xanthan coalIt made of a steam supply portion (27).

In addition, an upper part of the main body 17 of the differentiator 10, that is, an outlet 13 side, is provided with a non-illustrated temperature sensor for sensing a temperature inside the differentiator 10. The internal temperature of the main body 17 is above a predetermined value, that is, when a fire occurs, compared to a value inputted by the value sensed from the temperature sensor inside, a fire extinguishing CO 2 supply unit (not shown) is installed for the fire. It is.

And the differentiator 10 is designed to operate while maintaining the outlet temperature of 60 ~ 68 ℃ to minimize the occurrence of fire.

The conventional coal-fired power plant coal grinding mill 10 is thus driven by first removing the internal residual coal through the coal conveying air 25, and then, the coal of the main body 17 through the supply pipe 15 by its own weight. Flows inside.

As described above, the coal introduced into the main body 17 is ground (pulverized) by the hydraulic grinding roller 23 on the rotating grinding table 21 and simultaneously pulverized to a predetermined size.

The coal pulverized by the above grinding (grinding) roller 23 is ejected from the combustion burners at the corners of the boilers through the outlets 13 divided above the main body 17.

However, the conventional general grinding machine made as described above is further opened by a damper installed by the coal conveying means to maintain the outlet temperature of the grinding powder, that is, during the wet season, in particular, the outlet temperature of 60 ~ 68 ℃ hot air and cold air inflow The outlet temperature is adjusted to maintain the proper temperature. In this process, there is a problem that a fire frequently occurs in the differentiator as the temperature at the inlet side of the differentiator rises before reaching the excessively elevated temperature of the outlet temperature.

In addition, as described above, there is a problem that a large-scale accident may occur due to deterioration and deterioration of the facility due to frequent fires at the inlet part as the temperature of the inlet side of the conventional differentiator increases.

The present invention is installed in the differentiator to improve the problems of the prior art coal pulverization to monitor in real time the inherent light source wavelength band and intrinsic temperature color of the combustion products (heat, flame ultraviolet rays, infrared rays) generated in the fire Its purpose is to provide a fire monitoring system for pulverizers.

In addition, another object of the present invention is to determine whether the fire alarm based on the data input through the exit temperature sensor and the internal image, infrared and ultraviolet sensors of the differentiator.

The fire monitoring system of the pulverizer for pulverizing coal to achieve the object of the present invention is a plurality of different pulverizers for coal pulverization and supply to the boiler of the thermal power plant, the temperature sensor for detecting the temperature of the exit of each pulverizer, and the spark detection in the pulverizer In the CCD sensor, the infrared and ultraviolet detection sensors for the fire detection of the differentiator, and the differentiator fire detection device for detecting the fire of the differentiator through each sensor, the temperature data input from the temperature sensor of each differentiator and the corresponding differentiator A temperature data transmitter for transmitting the set address of the network to the network; An image server for transmitting image data input from the CCD sensor of each differentiator and an address of the differentiator to a network; A main processor for transmitting the data inputted from the infrared and ultraviolet sensors and the address of the differentiator to the network; And outputs the exit temperature of the differentiator received from each temperature data transmission unit, the image server, and the main processor through the network, and the image, infrared, and ultraviolet rays detected values in the differentiator, and judges a dangerous situation if it exceeds the preset reference value. Characterized in that it comprises a; central control server for displaying the alarm screen through.

The central control server displays the current temperature value of each differentiator exit through the HMI screen, sets a reference temperature, and outputs a high temperature alarm screen when the current temperature is determined to be higher than the reference temperature. Judging whether or not the spark through the image, and accumulates the number of sparks during the set time, and outputs a fire hazard alarm screen if more than the set reference number, and the infrared and ultraviolet generation of the band set within each of the different mills is the reference number during the set time If abnormality is detected, it is determined that a fire occurs and an alarm screen is output.

In addition, the HMI screen of the central control server displays detailed information as each differentiator is selected, but the numerical value of the current temperature at the exit of the differentiator, the cumulative number of sparks generated within the differentiator, the reset time, the ultraviolet ray and the infrared ray detection value are displayed. It is characterized in that it is displayed as a status display area to display, a temperature change trend area that shows a change in the sensed temperature changes with time as a graph, and a spark frequency trend area that displays the spark number per time set according to the time change as a graph.

The fire monitoring system of the coal mill for grinding coal according to the present invention receives each sensing value input from each mill exit temperature sensor, CCD sensor, infrared ray and ultraviolet ray sensor through a network and displays them in real time on the HMI screen of the central control room. It is effective to monitor the current status in the central control room through the screen.

In addition, the present invention sets the reference temperature for the temperature rise of the differentiator outlet, the reference number of sparks generated per hour, and when higher than the set value, such as "temperature rise", "spark sensor alarm", "fire occurrence", etc. An alarm window is displayed to promptly take action.As a result of the increase in the use of sub-bituminous coal, which contains a lot of volatile sub-bituminous coal, the real-time analysis and judgment of the fire caused by coal ignition in the coal-fired power plant using the coal is analyzed in advance to determine the causes of accidents of important facilities from the initial fire. It has an effect that can be removed.

1 is a cross-sectional configuration diagram of a general coal grinding mill,
2 is an overall configuration diagram of a fire monitoring system of coal mill for grinding coal according to an embodiment of the present invention,
3 is a view showing the entire differentiator monitoring screen displayed on the HMI screen of the central control room according to an embodiment of the present invention,
4 is an enlarged view of a part of the differentiator screen of FIG. 3;
FIG. 5 is a HMI screen display showing detailed state information of the selected differentiator in FIG. 3;
6 is a display diagram of trend setting change screens of different mills,
7a to 7c is a high temperature rise, spark detection alarm, fire occurrence alarm screen display,
8A and 8B show screens for setting the reference temperature and the reference spark generation integration frequency.

The configuration and operation of the fire monitoring system of the coal grinding mill according to an embodiment of the present invention will be described in more detail with reference to FIGS. 2 to 8B.

First, Figure 2 is an overall configuration of the fire monitoring system of the pulverized coal grinding machine according to an embodiment of the present invention, and a plurality of different A to differentiator F (111 ~ 114) for coal grinding and supply to the boiler of the thermal power plant and In addition, the temperature sensor 121 for sensing the temperature in each of the differentiator (111 ~ 116), the CCD sensor 122 for detecting the spark in the differentiator, infrared and ultraviolet detection sensor 123 for the fire monitoring of the differentiator, A temperature data transmitter 131 for transmitting the temperature data input from the temperature sensors 121 of the different powders 111 to 116 and the setting addresses of the different powders 111 to 116 through a network, and the different powders 111. The image server 132 transmits the image data input from the CCD sensor 122 and the address of the differentiator to the network, and the data inputted from the infrared and ultraviolet sensors 123 and the address of the differentiator. To send over the network The main processor 133, the temperature data transmission unit 131, the image server 132 and each of the differentiator (111 ~ 116) received from the main processor 133 through the network, the temperature, image, infrared and ultraviolet detection Display the value, and if the predetermined reference value or more, the central control server 140 to display the alarm screen through the HMI screen 141 to determine a dangerous situation, and outputs the image output from the central control server 140 It consists of a multi-room screen output unit 142.

Here, each of the sensors 121 to 123 of the differentiators 111 to 116, the temperature data transmitter 131, the image server 132, and the main processor 133 are connected to each other by RF-485 communication. The temperature data transmitter 131, the image server 132, and the main processor 133 and the central control server 140 are configured to transmit data through Ethernet communication.

The temperature sensor 121 is composed of FDLD (Flexible Thermocouple Line Detector), the thermal detection range is 40 ~ 260 ℃, the electromotive force generation is -2mV ~ + 11mV, there is a current temperature indicating function, the temperature set value can be adjusted It has a graphic function of temperature trend, data storage, preservation and input / output, wired and remote monitoring and control, and semi-permanent life.

The FDLD temperature sensor 121 is mounted on the differential branch outlet (Coal Pipe-1) on the upper side of the differential branch to sense a temperature.

As described above, the differentiator outlet temperature data detected by the temperature sensor 121 mounted at the outlets (Coal pipe-1) of each of the differentiators 111 to 116 is transferred through the temperature data transmitter 131 to the central control server 140. Is sent).

The CCD sensor 122 monitors the spark of the minimum illuminance 0.1Lux inside each differentiator (111 ~ 116), is within 10m of visible distance, the spark and fire detection time is 1ms, the detection sensitivity is -100 ~ +100 It uses a sensor having a.

The UV / IR sensor detects a fire that has an ultraviolet wavelength of 185 to 260 nm, an infrared wavelength of 4.2 to 5.2 μm, a sensing distance of 30 m, a viewing angle of 100 °, and a fire detection time of 0.2 sec. It transmits to the main processor 133 by Modbus Protocol of -485 type.

As such, the differential CCD internal CCD image detected by the CCD sensor 122 mounted in each of the differential powders 111 to 116 is transmitted to the central control server 140 through the image server 132, and the infrared rays are detected. The infrared / ultraviolet data detected by the / ultraviolet sensor 123 is transmitted to the central control server 140 through the main processor 133.

The central control server 140 monitors the different mills 111 to 116 based on the transmitted temperature data, CCD images, and infrared / ultraviolet data and alerts them when a fire risk occurs.

3 is an HMI screen display of the central control server for the fire monitoring of the coal mill grinding machine according to an embodiment of the present invention, Figure 4 is an enlarged view of one of the different mill state display diagram 151 in FIG.

The central control server 140 receives data transmitted from each of the sensors 121 to 123 of the different powders 111 to 116 and displays each current state in real time on the HMI screen 141.

That is, the current temperature of the differential pipe outlet temperature (Coal Pipe-1) input from the temperature sensor 121 is displayed, and 'SPARK integration' is integrated by displaying the number of sparks and fires detected by the CCD sensor 122. , 'RESET time' indicates the time in which the integrated value of the number of sparks input from the CCD sensor 122 is initialized in units of month, day, and hour. In addition, the cumulative number of sparks detected by the 'SPARK / 5Min' CCD sensor 122 is displayed for a set time (5 minutes). The 'UV / IR SENSOR' is displayed by adding up the number of times when a wavelength of a predetermined region among the wavelengths detected by the ultraviolet / infrared sensor 123 is generated.

In addition, to initialize the spark and fire occurrence integrated value of each of the displayed CCD sensor 122, the spark count integration of the infrared / ultraviolet sensor 123, select the 'ALL RESET' button.

In order to move the trend for each of the different powders 111 to 116, a trend (TREND) button or a trend moving button (A to F) 152 corresponding to each of the different powders is selected and moved.

On the other hand, the number of sparks during the set time (5 minutes) detected by the CCD sensor 122 is displayed on the bar graph display window 153 so that the administrator can easily check.

5 is a HMI screen display showing detailed information of each differentiator as a trend is selected in FIG.

That is, as shown in Fig. 4, the left side of the screen shows the current temperature of the differentiation exit of the selected differentiator, the spark integration count by the CCD sensor 122, the integration value reset time, the spark integration count of 5 minutes, and the detection frequency of the ultraviolet / infrared sensor. In the middle, the temperature and the number of occurrences of sparks are displayed numerically, where the temperature sensor 121 and the CCD sensor 122 are located, together with the differentiator image.

In the upper right part of the screen, a screen is displayed in the form of a graph displaying the detected temperature trend (FTLD TEMP TREND) 161 of the temperature sensor 121 by time, and in the lower right part, the number of sparks generated during the set 5 minutes is displayed by time. The spark cumulative trend (SPARK COUNT 5MIN TREND) 162 is displayed in the form of a graph.

Clicking each of the trend screens 161 and 162 displays a setting change screen.

6 is an embodiment of a setting change screen of each of the trends 161 and 162, and includes a trend length setting area that can be selected and set in units of minutes, hours, days, and months; An option area for selecting whether to use other auto range, auto guide line, display selected time point, or unique range for each graph is displayed.

7A to 7C are alarm screens generated according to the detected temperature, the number of sparks, and the UV / IR detection values, and FIG. 7A is a case in which the current temperature detected by the temperature sensor 121 is detected to be higher than a set reference temperature. Temperature rise "alarm screen is displayed, and if you click" Alarm check "at the bottom, the alarm screen is cleared.

7B outputs an alarm screen "SPARK sensor alarm occurrence" when the number of sparks detected and accumulated by the CCD sensor 122 is greater than or equal to the reference number, so that the administrator may take action.

FIG. 7C outputs a "fire occurrence" alarm screen when the flame is detected by the ultraviolet / infrared sensor 123 to allow the administrator to take action.

8A and 8B are screen display diagrams for setting reference values for outputting an alarm screen as shown in Figs. 7A to 7C.

8A is a screen display diagram for setting a reference temperature for the temperature rise alarm, and sets the reference temperature of each temperature sensor 121 of each of the differentiator A to F (111 to 116).

FIG. 8B is a screen display for setting a reference number for a spark generation alarm. The number of sparks detected by the CCD sensors 122 is accumulated for a predetermined time to output a fire hazard warning screen when the reference number is exceeded. In this case, as shown in the screen of FIG. 8, in order to set the reference frequency of spark integration for each differentiator A to F (111 to 116), the corresponding differentiator is selected to set the integration time or the reference frequency.

FIG. 9 is a screen display for setting an alarm level, in which the level for alarm is set to two levels of high (HiHi, High) and low (LoLo, Low), respectively, so that an appropriate action corresponding to the alarm level is generated. To take.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

111 ~ 116: Differentiator A ~ F 121: Temperature sensor
122: CCD sensor 123: infrared and ultraviolet sensor
131: temperature data transmission unit 132: video server
133: main processor 140: central control server
141: HMI screen 142: multi-room screen output unit
151: Differentiation status display screen 152: Differentiation trend selection button
153: Spark integration bar graph 161: Detection temperature trend graph
162: Spark integration trend graph

Claims (6)

A plurality of powders (111 to 116) for coal pulverization and supply to the boiler of the thermal power plant, a temperature sensor 121 for sensing the temperature of the outlet (Coal pipe) of each of the powders (111 to 116), and spark detection in the powder In the CCD sensor 122, the infrared and ultraviolet detection sensor 123 for the fire monitoring in the differentiator, and the differentiator fire detection device for detecting the fire in the differentiation through the respective sensors (121 ~ 123),
A temperature data transmitter for transmitting the temperature sensor of each of the differentiators 111 to 116 and the setting address of the corresponding differentiators 111 through 116 through a network;
An image server for transmitting the image data input from the CCD sensors of the different powders 111 to 116 and the addresses of the powders to the network;
A main processor for transmitting the data inputted from the infrared and ultraviolet sensors and the address of the differentiator to the network; And
Outputs the temperature of the differentiation exit, image in the differentiation, infrared and ultraviolet ray detection data transmitted from each temperature data transmission unit, image server and main processor through the network, and if it is over the preset reference value, determines HMI as a dangerous situation. Central control server for displaying the alarm screen through; Fire monitoring system of the coal mill for grinding the coal, characterized in that comprises a. The method of claim 1,
The central control server displays the current temperature value of each of the differentiator (111 ~ 116) exit through the HMI screen, sets the reference temperature, and outputs a high temperature alarm screen when the current temperature is determined to be higher than the reference temperature. ,
Judging whether or not the spark through the CCD image in each of the differentiator (111 ~ 116), accumulate the number of occurrences of the spark during the set time, and outputs a fire hazard alarm screen when the set number of times or more,
Fire detection system of the coal mill for grinding the coal, characterized in that if the generation of infrared and ultraviolet rays of the band set in each of the different mills (111 ~ 116) is detected more than the reference number of times during the set time, the fire occurrence and the alarm screen. The method of claim 1,
The temperature data transmission unit, the image server, the main processor,
Fire monitoring system of coal mill for grinding coal, characterized in that the sensor is connected to each sensor of each of the mills 111-116 by RF-485 communication method, and transmits sensor data, and transmits data to the central control server and Ethernet communication. . The method of claim 1,
The HMI screen of the central control server is characterized by displaying the current temperature of each of the differentiator (111 ~ 116), the integrated value during the setting time of the spark, the number of ultraviolet rays and infrared rays detected by the number and the bar graph (Bar graph). Fire monitoring system of coal mill for grinding coal. The method of claim 1,
The HMI screen of the central control server displays detailed information as each differentiator 111 to 116 is selected.
A status display area that displays numerically the current temperature at each exit of the differentiator (111 ~ 116), the cumulative number of sparks generated within the differentiator, the reset time, UV and infrared detection values;
Temperature trend trend area that shows the temperature change with time
A fire monitoring system of a coal mill for coal milling, characterized in that the number of sparks set per hour according to the change of time is displayed as a graph of the spark count trend area. The method of claim 1,
The central control server is a fire monitoring system for coal mill grinding, characterized in that the alarm by setting the "High", "Low" alarm according to the temperature and the number of sparks in two stages.

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