CN110377938B - Coke oven vertical flame path temperature field analysis method - Google Patents
Coke oven vertical flame path temperature field analysis method Download PDFInfo
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Abstract
The invention provides an analysis method of a coke oven vertical flame path temperature field, which provides more characteristic values for coke oven vertical flame path heating management, is favorable for refining the coke oven heating management, improves timeliness and effectiveness of heating adjustment, promotes uniform and reasonable distribution of coke oven temperature, saves energy and reduces consumption.
Description
Technical Field
The invention belongs to the coking production process technology, and relates to a method for analyzing a vertical flame path temperature field of a coke oven.
Background
The coking production process is the carbonization process of coking coal in a carbonization chamber, and in order to realize stable and low-consumption production of high-quality coke by a coke oven, the coking chamber must be heated uniformly in the high and long directions and among the chambers. The gas and air flow burn in the vertical fire channel in a diffusion combustion mode, and the heat of flame and hot waste gas generated by combustion is transferred to the furnace wall in a radiation and convection mode and is transferred from the combustion chamber to the carbonization chamber through the furnace wall.
The coke oven carbonization chambers and the combustion chambers are alternately arranged, an N-hole coke oven has N+1 combustion chambers, each combustion chamber is provided with a plurality of vertical flame paths, and taking the current main-stream coke oven with the volume of 7 meters as an example, one combustion chamber has 34 vertical flame paths. The different temperature requirements of each vertical flame path of the coke oven are the requirements of the coking production process, and the center of gravity of the heating management of the coke oven is the control of the combustion condition and the temperature of each vertical flame path. In order to realize uniform heating and convenient inspection control, a representative flame path capable of reflecting the average flame path temperature at the two sides of the coke is selected at the machine side and the coke side of each combustion chamber, and is used as a temperature measuring flame path, also called a standard flame path, and the average temperature control value of the temperature measuring flame path at the machine side and the coke side is the standard temperature, and the index is a main temperature index for ensuring the maturation of coke cakes in the specified coking time.
The vertical flame path of the coke oven is a three-dimensional space formed by refractory materials, the temperature distribution in the three-dimensional space objectively reflects the flame combustion state in the vertical flame path, has a very large guiding effect on the temperature adjustment of each vertical flame path of the coke oven, has targeted coke oven temperature and pressure adjustment, and realizes reasonable distribution of the temperature field of the vertical flame path of the coke oven, which is the key for reducing the cost on the premise of ensuring the even and mature coke.
Disclosure of Invention
In order to realize the refinement of heating adjustment of the coke oven, the invention provides an analysis method of a vertical flame path temperature field of the coke oven, which avoids excessive local oven temperature and lower local temperature on the premise of ensuring uniform and mature coke, and comprises the following specific steps:
step 1: establishing a temperature field in a three-dimensional space
Collecting a vertical flame path thermal image of a coke oven through a thermal imager, dividing the thermal image into a bottom cross section temperature field of the vertical flame path and a vertical flame path longitudinal section temperature field, dividing the bottom cross section temperature field into an X-axis thermal image and a Y-axis thermal image, dividing the vertical flame path longitudinal section temperature field into a Z-axis thermal image, and establishing a thermal image temperature field of a three-dimensional space;
step 2: obtaining characterization parameters
Thermal image analysis along the Z axis to obtain high-directional temperature distribution; analyzing the thermal images along the X-axis and the Y-axis to obtain characterization parameters, wherein the characterization parameters comprise the highest temperature Tmax of the vertical flame path, the average temperature Tt of the vertical flame path and the extremely poor temperature DeltaT of the vertical flame path;
step 3: adjustment guide
And (3) adjusting and guiding the heating process of the vertical flame path of the coke oven by utilizing the characterization parameters obtained in the step (2).
In the step 2, the high-directional temperature distribution is used for characterizing parameters of suction adjustment of a heating system of the coke oven.
As an improvement, when the high-directional temperature distribution curve deviates from a set temperature standard curve by a certain range within a period of time, an alarm device in a coke oven vertical fire channel is started to alarm, so that the suction force of a coke oven heating system is adjusted in real time, and the high-directional temperature of the coke oven heating system is adjusted to be within a proper range; when the high-directional temperature distribution curve is in the set temperature standard curve range within a period of time, the temperature measurement is continuously and preserved, and the suction process parameters of the coke oven heating system are maintained unchanged.
In the step 2, the highest temperature Tmax of the vertical flame path is the temperature of the bottommost part of the vertical flame path, is the limiting temperature, and is set into a thermal image, wherein the temperature is less than or equal to 1450 ℃.
As an improvement, when the real-time measurement temperature is higher than the standard value range of the highest temperature Tmax of the flame path, the flame path is judged to be very normal, and an alarm is sent out and simultaneously and immediately adjusted; and when the real-time measured temperature is within the standard value range of the maximum temperature Tmax of the vertical flame path, judging that the temperature is normal, and continuing to work.
In step 2, the average temperature Tt of the flame path is the average value of the temperatures of the square matrixes after gridding the thermal image and eliminating the irregular square matrixes, that is, tt= (T) 1 +T 2 +.. + Tn/n, tn being the highest temperature within each thermographic grid area, n being the grid number, being a positive integer; tt is the management temperature, is used for calibrating the maturity of coke and guiding the heating management of the coke oven.
As an improvement, when the average temperature measured in real time by the vertical flame path is out of the standard value range of Tt, the coke is calibrated to be low in maturity, an alarm is sent out, and the heating speed of the coke oven needs to be adjusted at the same time; when the average temperature measured by the vertical flame path is within the standard value range of Tt, the coke is calibrated to have proper maturity, and the work is continued.
In the step 2, the temperature range delta T of the flame path is the difference delta t=tmax-Tmin between the highest temperature and the lowest temperature of each square matrix after the thermal image is gridded and the circumference irregular square matrix is removed, wherein Tmax and Tmin can be obtained from thermal image analysis software; the delta T is used for adjusting the ratio value of the gas and the air in the vertical flame path.
As an improvement, when the real-time measurement temperature range deviates from the standard value range of the temperature range delta T of the vertical flame path, a warning is sent out, and the combustion temperature needs to be changed by adjusting the ratio value of the gas and the air in the vertical flame path; when the real-time measurement temperature range is within the standard value range of the temperature range delta T of the vertical flame path, the ratio value of the gas and the air in the vertical flame path is in a proper range, and the vertical flame path works normally.
The beneficial effects are that: the analysis method of the coke oven vertical fire channel temperature field provides more characteristic values for the coke oven vertical fire channel heating management, is beneficial to the refinement of coke oven heating management, and improves the timeliness and effectiveness of heating adjustment
The foregoing description is only an overview of the present invention, and is intended to provide a more thorough understanding of the present invention, and is to be accorded the full scope of the present invention.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The invention provides an analysis method of a coke oven vertical flame path temperature field, which comprises the following specific steps:
step 1: establishing a temperature field in a three-dimensional space
Collecting a vertical flame path thermal image of a coke oven through a thermal imager, dividing the thermal image into a bottom cross section temperature field of the vertical flame path and a vertical flame path longitudinal section temperature field, dividing the bottom cross section temperature field into an X-axis thermal image and a Y-axis thermal image, dividing the vertical flame path longitudinal section temperature field into a Z-axis thermal image, and establishing a thermal image temperature field of a three-dimensional space;
step 2: obtaining characterization parameters
Thermal image analysis along the Z axis to obtain high-directional temperature distribution; analyzing the thermal images along the X-axis and the Y-axis to obtain characterization parameters, wherein the characterization parameters comprise the highest temperature Tmax of the vertical flame path, the average temperature Tt of the vertical flame path and the extremely poor temperature DeltaT of the vertical flame path;
step 3: adjustment guide
And (3) adjusting and guiding the heating process of the vertical flame path of the coke oven by utilizing the characterization parameters obtained in the step (2).
In the step 2, the high-directional temperature distribution is used for the characterization parameters of suction adjustment of the heating system of the coke oven. When the high-directional temperature distribution curve in a period of time deviates from a set temperature standard curve by a certain range, starting a warning device in a coke oven vertical fire channel to give a warning, and further adjusting the suction force of a coke oven heating system in real time to adjust the high-directional temperature to be in a proper range; when the high-directional temperature distribution curve is in the set temperature standard curve range within a period of time, the temperature measurement is continuously and preserved, and the suction process parameters of the coke oven heating system are maintained unchanged.
In the step 2, the highest temperature Tmax of the vertical flame path is the temperature of the bottommost part of the vertical flame path, is the limiting temperature, and is set to be the inside of the thermal image, and the temperature is less than or equal to 1450 ℃. When the real-time measured temperature is higher than the standard value range of the highest temperature Tmax of the vertical flame path, judging that the vertical flame path is abnormal, giving an alarm and simultaneously immediately adjusting; and when the real-time measured temperature is within the standard value range of the maximum temperature Tmax of the vertical flame path, judging that the temperature is normal, and continuing to work.
In step 2, the average temperature Tt of the flame path is the average value of the temperatures of the square matrixes after gridding the thermal image and eliminating the irregular square matrixes, i.e., tt= (T) 1 +T 2 +.. + Tn/n, tn being the highest temperature within each thermographic grid area, n being the grid number, being a positive integer; tt is the management temperature, is used for calibrating the maturity of coke and guiding the heating management of the coke oven.
When the average temperature measured in real time by the vertical flame path is out of the standard value range of Tt, the coke is calibrated to have low maturity, an alarm is sent out, and the heating speed of the coke oven needs to be adjusted at the same time; when the average temperature measured by the vertical flame path is within the standard value range of Tt, the coke is calibrated to have proper maturity, and the work is continued.
In the step 2, the temperature range Δt of the vertical flame path is the difference Δt=tmax-Tmin between the highest temperature and the lowest temperature of each square matrix after the thermal image is gridded and the circular irregular square matrix is removed, wherein Tmax and Tmin can be obtained from thermal image analysis software; the delta T is used for adjusting the ratio value of the gas and the air in the vertical flame path.
When the real-time measurement temperature range deviates from the standard value range of the vertical flame path temperature range delta T, an alarm is given, and the combustion temperature is required to be changed by adjusting the ratio value of the gas and the air in the vertical flame path; when the real-time measurement temperature range is within the standard value range of the temperature range delta T of the vertical flame path, the ratio value of the gas and the air in the vertical flame path is in a proper range, and the vertical flame path works normally.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (3)
1. A method for analyzing a vertical flame path temperature field of a coke oven is characterized by comprising the following steps: the method comprises the following specific steps:
step 1: establishing a temperature field in a three-dimensional space
Collecting a vertical flame path thermal image of a coke oven through a thermal imager, dividing the thermal image into a bottom cross section temperature field of the vertical flame path and a vertical flame path longitudinal section temperature field, dividing the bottom cross section temperature field into an X-axis thermal image and a Y-axis thermal image, dividing the vertical flame path longitudinal section temperature field into a Z-axis thermal image, and establishing a thermal image temperature field of a three-dimensional space;
step 2: obtaining characterization parameters
Thermal image analysis along the Z axis to obtain high-directional temperature distribution; obtaining characterization parameters along X-axis thermography and Y-axis thermography analysis, including the highest temperature T of the vertical flame path max Average temperature T of vertical flame path t The temperature delta T of the vertical flame path is extremely poor;
wherein the average temperature T of the vertical flame path t To grid thermal images and remove irregular square matrixes of circumference, the average value of the temperatures of each square matrix is T t =(T 1 +T 2 +.....+T n )/n，T n For the highest temperature in each thermal image grid area, n is a grid sequence number and is a positive integer; tt is a management temperature used for calibrating the maturity of coke and guiding the heating management of the coke oven;
when the average temperature measured in real time by the vertical flame path is out of the standard value range of Tt, the coke is calibrated to have low maturity, an alarm is sent out, and the heating speed of the coke oven needs to be adjusted at the same time; when the average temperature measured by the vertical flame path is within the standard value range of Tt, calibrating to be proper in maturity of coke, and continuing to work;
the vertical flame path temperature range DeltaT is the difference between the highest temperature and the lowest temperature of each square matrix after the thermal image is gridded and the circumference irregular square matrix is removed, deltaT=T max -T min Wherein T is max 、T min Obtained from thermal image analysis software; the delta T is used for adjusting the ratio value of the gas and the air in the vertical flame path; when the real-time measurement temperature range deviates from the standard value range of the vertical flame path temperature range delta T, an alarm is given, and the combustion temperature is required to be changed by adjusting the ratio value of the gas and the air in the vertical flame path; when the real-time measurement temperature range is within the standard value range of the temperature range delta T of the vertical flame path, the ratio value of the gas and the air in the vertical flame path is in a proper range, and the vertical flame path works normally; the highest temperature T of the vertical flame path max The temperature of the bottommost part of the vertical flame path is the limit temperature which is less than or equal to 1450 ℃;
the high-directional temperature distribution is used for representing parameters for adjusting the suction force of the heating system of the coke oven;
step 3: adjustment guide
And (3) adjusting and guiding the heating process of the vertical flame path of the coke oven by utilizing the characterization parameters obtained in the step (2).
2. The method for analyzing a coke oven vertical flame path temperature field according to claim 1, wherein: when the high-directional temperature distribution curve deviates from a set temperature standard curve by a certain range within a period of time, an alarm device in a coke oven vertical fire channel is started to alarm, so that the suction force of a coke oven heating system is adjusted in real time, and the high-directional temperature is adjusted to be within a proper range; when the high-directional temperature distribution curve is in the set temperature standard curve range within a period of time, the temperature measurement is continuously and preserved, and the suction process parameters of the coke oven heating system are maintained unchanged.
3. The method for analyzing a coke oven vertical flame path temperature field according to claim 2, wherein: when the real-time measured temperature is higher than the highest temperature T of the vertical fire path max When the standard value is within the range, judging that the device is abnormal, giving an alarm and immediately adjusting the device at the same time; when the real-time temperature is measured at the highest temperature T of the vertical fire path max And if the standard value is within the range, judging that the operation is normal, and continuing the operation.
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