CN110951495A - Method, system, medium and equipment for controlling coke quality in whole coking process - Google Patents
Method, system, medium and equipment for controlling coke quality in whole coking process Download PDFInfo
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Abstract
The invention relates to a method, a system, a medium and equipment for controlling coke quality in the whole coking process, wherein the method comprises the following steps: judging the feasibility of a coal blending scheme through a small coke oven test, and performing coal blending operation according to the judged coal blending scheme; acquiring coke oven state parameters detected in the coking process; controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the coke oven state parameters; and predicting the maturity of the coke according to the state parameters of the coke oven, acquiring the test result of the coke product when the predicted maturity of the coke meets the requirement, and determining the actual value of the coke quality according to the test result of the coke product. The method firstly judges the feasibility of the coal blending scheme through a small coke oven test before coking, thereby effectively ensuring the reasonable economy of the blended coal entering the oven from the source control perspective, controlling the fluctuation of the standard temperature of the coke oven and the maturity of the coke during the coking process and effectively ensuring the quality of the finally produced coke products.
Description
Technical Field
The invention belongs to the field of coking production, and particularly relates to a method, a system, a medium and equipment for controlling coke quality in the whole coking process.
Background
The coke is a solid product obtained by dry distillation of bituminous coal serving as a main raw material under the condition of air isolation, and the blast furnace metallurgical coke refers to a product formed by heating the bituminous coal to 950 ℃ and 1050 ℃ in an indoor coke furnace. The coke quality indexes comprise ash content, sulfur content, strength, lumpiness, reactivity with carbon dioxide and strength after reaction with carbon dioxide, and the indexes have great relations with coal blending composition and coke maturity, and relate to the whole coking process. In the prior art, the control on the coke quality needs to be realized by means of the operation experience of an operator, the standard temperature of the whole furnace cannot be accurately and timely controlled, the coke quality of a product is ensured, and the coke maturity cannot be automatically judged.
Disclosure of Invention
In view of the above technical problems, the present invention provides a method, system, medium and apparatus for controlling coke quality in the whole coking process.
The technical scheme for solving the technical problems is as follows: a method for controlling coke quality in the whole coking process comprises the following steps:
judging the feasibility of a coal blending scheme through a small coke oven test, and performing coal blending operation according to the judged coal blending scheme;
acquiring coke oven state parameters detected in the coking process;
controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the coke oven state parameters;
and predicting the maturity of the coke according to the state parameters of the coke oven, acquiring the test result of the coke product when the predicted maturity of the coke meets the requirement, and determining the actual value of the coke quality according to the test result of the coke product.
The invention has the beneficial effects that: before coking, the feasibility value of the coal blending scheme is judged through a small coke oven test, so that the reasonable economy of the coal blending entering the coke oven is effectively ensured from the source control perspective, the fluctuation of the standard temperature of the coke oven and the coke maturity are controlled in the coking process, and the quality of the finally produced coke product is effectively ensured.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the method further comprises: acquiring the temperature of a coke cake in the coke pushing process, and verifying whether the maturity of the coke meets the requirement according to the temperature of the coke cake;
and when the coke maturity is predicted and/or verified to meet the requirement, acquiring the test result of the coke product, and determining the actual value of the coke quality according to the test result of the coke product.
The method has the advantages that the maturity of the coke is verified by measuring the surface temperature of the coke cake so as to be compared with the judgment index of the whole coking process to form a data loop.
Further, the coke oven state parameters include: the temperature measurement temperature of a standard flame path, the return pressure of coke oven gas, the suction force of a coke side branch flue of a coke oven machine, the flow of the coke side of a blast furnace gas machine and the temperature of crude gas.
Further, the controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the coke oven state parameters specifically comprises:
and adjusting the return pressure of the coke oven gas, the suction force of a coke side branch flue of the coke oven machine and the flow of the coke side of the blast furnace gas machine by adopting a fuzzy control algorithm according to the acquired temperature measurement temperature of the standard flame path, and controlling the fluctuation of the standard temperature of the coke oven within a preset range.
Further, the predicting the coke maturity according to the coke oven state parameters specifically comprises:
calculating the fire falling time according to the obtained temperature of the raw gas;
calculating the smoldering time according to the fire falling time and the planned coke pushing time;
and predicting the coke maturity according to the braising time.
Further, the method further comprises: and when the predicted coke maturity does not meet the requirement, increasing the heating temperature and/or increasing the stewing time until the predicted coke maturity meets the requirement.
Further, the method further comprises:
and storing the coal, the coal blending scheme, the small coke oven test, the temperature control of the coking process and the fire drop data before coke pushing in a coking production management system database in a correlation way with the coke cake temperature and the test result of the coke product in the coke pushing process.
The method has the advantages that data in the whole coking process are stored in the database of the coking production management system in a correlated manner, analysis and screening are conveniently carried out according to the database results, the operation links in the whole coking process are further corrected, and the accuracy of each step is ensured.
In order to achieve the above object, the present invention further provides a system for controlling coke quality in the whole coking process, comprising:
the coal blending module is used for judging the feasibility of a coal blending scheme through a small coke oven test and performing coal blending operation according to the judged coal blending scheme;
the parameter acquisition module is used for acquiring the coke oven state parameters detected in the coking process;
the heating control module is used for controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the state parameters of the coke oven;
the maturity prediction module is used for predicting the maturity of the coke according to the state parameters of the coke oven;
and the quality determining module is used for acquiring the test result of the coke product when the maturity predicting module predicts that the coke maturity meets the requirement, and determining the actual value of the coke quality according to the test result of the coke product.
Further, the system further comprises: the maturity verification module is used for acquiring the temperature of a coke cake in the coke pushing process and verifying whether the maturity of the coke meets the requirement or not according to the temperature of the coke cake;
and the quality determining module is used for acquiring the test result of the coke product when the coke maturity is predicted and/or verified to meet the requirement, and determining the actual value of the coke quality according to the test result of the coke product.
Further, the coke oven state parameters include: the temperature measurement temperature of a standard flame path, the return pressure of coke oven gas, the suction force of a coke side branch flue of a coke oven machine, the flow of the coke side of a blast furnace gas machine and the temperature of crude gas.
Further, the heating control module is specifically configured to:
and adjusting the return pressure of the coke oven gas, the suction force of a coke side branch flue of the coke oven machine and the flow of the coke side of the blast furnace gas machine by adopting a fuzzy control algorithm according to the acquired temperature measurement temperature of the standard flame path, and controlling the fluctuation of the standard temperature of the coke oven within a preset range.
Further, the maturity prediction module specifically includes:
the fire drop time calculation unit is used for calculating the fire drop time according to the acquired raw coke oven gas temperature;
the smoldering time calculating unit is used for calculating smoldering time according to the fire falling time and the planned coke pushing time;
and the maturity prediction unit is used for predicting the maturity of the coke according to the braising time.
Further, the system further comprises:
and the adjusting module is used for increasing the heating temperature and/or increasing the stewing time when the maturity predicting module predicts that the coke maturity does not meet the requirement until the predicted coke maturity meets the requirement.
Further, the system further comprises:
and the data storage module is used for storing the coal, the coal blending scheme, the small coke oven test, the coking process temperature control and the pre-coke-pushing fire drop data in a coking production management system database in a correlation manner with the coke cake temperature and the test result of the coke product in the coke pushing process.
The present invention also provides a computer-readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the above-described method.
The invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method when executing the program.
Drawings
FIG. 1 is a flow chart of a method for controlling coke quality in the whole coking process according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for controlling coke quality in the whole coking process according to the embodiment of the present invention;
FIG. 3 is a partial installation block diagram of the coke cake temperature measurement system;
FIG. 4 is a raw gas temperature trend curve.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Except for a key coal blending link, the whole coking process mainly refers to the steps of charging the blended coal into a coking chamber to form product coke (coking process), judging the fire drop before pushing coke, monitoring the coke quality in the pushing coke process and testing the product after pushing coke.
FIG. 1 is a flow chart of a method for controlling coke quality in the whole coking process, as shown in FIG. 1, the method comprises the following steps:
s11, judging the feasibility of the coal blending scheme through a small coke oven test, and performing coal blending operation according to the judged coal blending scheme;
specifically, the small coke oven test is a common test coking coal test, and the principle is to simulate the production conditions of an industrial coke oven, load a coal sample which is subjected to coal preparation and coal loading procedures into a test coke oven carbonization chamber with two sides heated, dry distill the test coal sample at high temperature to form coke under the condition of air isolation, and pre-judge the coal blending feasibility and the product quality by detecting the test coke index. The specific process is as follows:
(1) inputting the current stock coal types through a coal blending expert system, and screening various coal blending schemes from data of product quality and coal blending cost;
the coal blending expert system needs to be established according to a historical database of a production plant, and comprises single coal coking performance and historical matching proportion test data results.
(2) Determining a planned production coal blending scheme by a professional coal blending engineer according to the current actual production conditions;
(3) and judging the feasibility of the selected coal blending scheme and the corresponding predicted value of the coke quality through a small coke oven test.
S12, acquiring coke oven state parameters detected in the coking process;
specifically, the coke oven state parameters may include: the temperature measurement temperature of a standard flame path, the return pressure of coke oven gas, the suction force of a coke side branch flue of a coke oven machine, the flow of the coke side of a blast furnace gas machine and the temperature of crude gas.
The parameters are measured by corresponding measuring equipment, for example, the temperatures of a furnace top machine and a coke side representative flame path are automatically measured by coke oven vertical flame path online temperature measuring equipment, and are converted into standard flame path temperature measuring temperatures through a model, specifically, the temperature measuring temperatures are calculated according to the slope of a transverse curve of a single-row combustion chamber.
When the automatic temperature measurement data is acquired, the temperature measurement data can be processed to remove the influence of a coking period and an exchange period. In addition, the device can be used in cooperation with manual temperature measurement, and automatic temperature measurement data are regularly calibrated by acquiring the manual temperature measurement data, so that external interference such as scaling of a lens of the temperature measuring instrument, deviation of a temperature measurement point, change of an emission coefficient and the like is eliminated, and the accuracy of the temperature data is ensured.
S13, controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the coke oven state parameters;
specifically, in general conditions, different standard temperatures of combustion chambers are corresponding to conditions of different coke oven types, different coking times, different coal blending ratios and the like, and in the step, the standard temperature of the whole oven is accurately and timely controlled through online temperature measurement and automatic adjustment technical means, so that the quality of coke products is ensured.
Wherein, according to the requirements of the production process, the fluctuation of the temperature can be controlled by adopting various control modes such as a fuzzy control algorithm and the like in the actual production. The temperature fluctuation can be reflected by the stability factor, and the uniformity factor needs to be monitored to ensure uniform heating. The calculation method of the uniformity coefficient and the stability coefficient belongs to the prior art, which is not described herein, and the frequency of calculating the uniformity coefficient and the stability coefficient can be arranged according to the requirement in the production process, for example, the uniformity coefficient is calculated once every 2 exchange cycles, and the stability coefficient is calculated once every day. Generally, the standard temperature fluctuation of the coke oven is controlled within the range of +/-7 ℃.
S14, predicting the coke maturity according to the coke oven state parameters;
specifically, the step belongs to the process of fire drop judgment, and the fire drop is an objective phenomenon in the coking production process and is a mark for basic maturity of coke cakes. The fire drop judgment refers to a method for further judging and controlling the coke maturity by utilizing certain inherent characteristics of the blended coal in the carbonization chamber dry distillation process, and can be realized by adopting various methods, for example, the coke maturity can be predicted according to the measured crude gas temperature by utilizing the linear relation between the time when the crude gas temperature reaches the highest point and the fire drop time.
And S15, when the predicted coke maturity meets the requirement, acquiring the test result of the coke product, and determining the actual value of the coke quality according to the test result of the coke product.
Specifically, coke products can be extracted and tested according to the influence factors of coal blending batches, teams and the like, and the test results are led into a coking production management system database, wherein the coming coal, the coal blending scheme, the small coke oven test, the coking process temperature control, the pre-coke pushing fire drop data, the coke cake temperature in the coke pushing process and the test results of the coke products are stored in the coking production management system database in a correlated mode, the analysis and the screening are conveniently carried out according to the database results, the whole coking process operation link is effectively corrected and optimized, and therefore the coking production cost is effectively controlled.
According to the method for controlling the coke quality in the whole coking process, before coking, the feasibility value of a coal blending scheme is judged through a small coke oven test, so that the reasonable economy of the coal blending entering the coke oven is effectively ensured from the source control perspective, the fluctuation of the standard temperature of the coke oven and the coke maturity are controlled in the coking process, and the quality of the finally produced coke product is effectively ensured.
Alternatively, in this embodiment, as an embodiment of the present invention, as shown in fig. 2, the method includes:
s21, judging the feasibility of the coal blending scheme through a small coke oven test, and performing coal blending operation according to the judged coal blending scheme;
s22, acquiring coke oven state parameters detected in the coking process;
s23, controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the coke oven state parameters;
s24, predicting the coke maturity according to the coke oven state parameters;
s25, acquiring the coke cake temperature in the coke pushing process, and verifying whether the coke maturity meets the requirement according to the coke cake temperature;
specifically, one of the key indicators of coke maturity is the coke cake center temperature 950-:
(1) measuring and monitoring the temperature of a coke cake of the coke oven through online temperature measuring equipment arranged on two sides of a coke guide grid of the coke oven coke guide;
(2) and recording, analyzing and counting the coke temperatures at different production moments through coke cake temperature software to form a database.
The structure diagram of the local installation of the coke cake temperature measurement system is shown in fig. 3, and infrared thermometers are installed on two sides of the coke guide grid to detect the surface temperature of the coke cake. And 3 groups of temperature measuring holes are respectively formed at three positions of the high part, the middle part and the bottom part according to the height of the coke cake, and the temperature of the coke cake at different height positions is measured. To prevent large coke particles from settling in the pipes, a 45 ° ramp down installation was used. Compressed air is arranged in the pipeline of the temperature measuring instrument, so that dust deposition of a lens and small particle deposition in the pipeline can be prevented.
And S26, when the maturity of the coke is predicted and/or verified to meet the requirement, acquiring the test result of the coke product, and determining the actual value of the coke quality according to the test result of the coke product.
In this example, the coke maturity is verified by measuring the coke cake surface temperature to form a data loop in comparison with the overall process determination indicator.
Optionally, in this embodiment, step S13 specifically includes:
and adjusting the return pressure of the coke oven gas, the suction force of a coke side branch flue of the coke oven machine and the flow of the coke side of the blast furnace gas machine by adopting a fuzzy control algorithm according to the acquired temperature measurement temperature of the standard flame path, and controlling the fluctuation of the standard temperature of the coke oven within a preset range.
Optionally, in this embodiment, step S14 specifically includes:
s141, calculating the fire drop time according to the acquired temperature of the raw coke oven gas;
specifically, in the step, firstly, the detected temperature of the crude gas at the bridge pipe is required to be obtained, the temperature of the crude gas in each carbonization chamber is monitored in real time to generate a temperature curve, the linear relation between the highest point of the temperature of the crude gas and the manually and actually calibrated fire drop time is obtained through calculation and analysis of the curve, and the actual fire drop time can be calculated by utilizing the time when the temperature of the crude gas reaches the highest point in the later production according to the correlation relation.
S142, calculating the smoldering time according to the fire falling time and the planned coke pushing time;
specifically, the time from the 'fire falling time' to the 'planned coke pushing time' is called 'placing time' and 'stewing time', the heating system of the coke oven is kept unchanged during the 'placing time' stage of the coke cake, the heating of each point of the coke cake is further homogenized, and the central temperature of the coke cake is gradually increased to the final temperature of coke formation.
And S143, predicting the coke maturity according to the braising time.
Specifically, according to production experience, the braising time needs to be guaranteed for a certain time (for example, half a hour) to enable the coke maturity to meet the requirement, and if the calculated braising time is insufficient, the coke maturity is predicted to not meet the requirement.
Optionally, in this embodiment, the method further includes:
and S16, when the predicted coke maturity does not meet the requirement, increasing the heating temperature and/or increasing the stewing time until the predicted coke maturity meets the requirement.
Specifically, if the predicted coke maturity can not meet the requirement within the planned coking time or before the planned coke pushing time, the online temperature of the vertical flame path temperature of the combustion chambers on the two sides corresponding to the coking chamber can be manually rechecked, the coal charging furnace mouth is opened to check the coke maturity, and the heating temperature or the stewing time is increased on the basis until the presumed coke quality meets the requirement.
When the coke maturity of the single-hole carbonization chamber is predicted to be not up to the standard, the horizontal row temperature (including the standard flame path temperature) is rechecked, and when the difference value between the standard flame path temperature and the required standard temperature reaches a set value (such as 10 degrees), the large-hole plate is changed to increase the set value (such as 2mm), the gas flow is controlled, or the furnace closing time within a set time (such as 30 minutes) is increased;
when the coke maturity of the full-hole carbonization chamber is predicted to be not up to the standard, the standard flame path temperature of the full furnace is rechecked, and when the difference value between the standard flame path temperature and the required standard temperature reaches a set value (such as 10 degrees), the gas flow of the main pipe is adjusted, and the suction force of the turning plate of the sub-flue is adjusted.
Increasing the soak time can be achieved by increasing the projected coking time or delaying the coke push time.
Optionally, in this embodiment, the method further includes adjusting the temperature uniformity of the furnace body by detecting the temperature of the horizontal rows and the temperature of the furnace ends.
Specifically, in the above description, the adjustment of the representative flame path temperature fluctuation within the preset range by adjusting the gas flow and the suction force of the flue-divided flap is simply to control the temperature of the whole-furnace representative flame path (standard flame path) by the heat balance, taking a six-meter coke oven as an example, each combustion chamber has 32 flame paths in total, two of which are standard flame paths, including the machine side 1, 2 flame paths, and the coke side 31, 32 flame path standard flame paths. The temperature of the flame path (standard flame path) cannot accurately represent the temperatures of other flame paths in the same combustion chamber, so that the relationship between the standard flame path and the temperatures of other flame paths needs to be obtained by measuring the transverse-row temperature and curve and the furnace end temperature and curve according to the heating management period. Wherein the measurement of the lateral row temperature is performed in order to check the rationality of the temperature distribution along the length of the combustion chamber. The furnace end temperature refers to the temperature of the first vertical flame path and the second vertical flame path on two sides of a certain combustion chamber, generally, due to the heat dissipation problem, the furnace end temperature is easy to have low temperature (lower than 1100 ℃), and the uniformity of the whole furnace temperature is influenced. When the furnace body temperature is found to be uneven by detecting the temperature of the transverse rows and the temperature of the furnace end, the coke furnace equipment needs to be overhauled in time to ensure the uniformity of the temperature of the furnace body.
In addition, the uniformity of the temperature of the coke oven body can be further improved by controlling the sectional area of the small pore plate, adjusting the smoothness of the inclined passage hole cover plate brick and the coal gas lower spray pipe and sealing the regenerator sealing wall.
The embodiment of the present invention provides a system for controlling coke quality in the whole coking process, wherein the functional principle of each module in the system has been specifically introduced in the foregoing content, and is not described in detail below, and the system comprises:
the coal blending module is used for judging the feasibility of a coal blending scheme through a small coke oven test and performing coal blending operation according to the judged coal blending scheme;
the parameter acquisition module is used for acquiring the coke oven state parameters detected in the coking process;
the heating control module is used for controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the state parameters of the coke oven;
the maturity prediction module is used for predicting the maturity of the coke according to the state parameters of the coke oven;
and the quality determining module is used for acquiring the test result of the coke product when the maturity predicting module predicts that the coke maturity meets the requirement, and determining the actual value of the coke quality according to the test result of the coke product.
Optionally, in this embodiment, the system further includes: the maturity verification module is used for acquiring the temperature of a coke cake in the coke pushing process and verifying whether the maturity of the coke meets the requirement or not according to the temperature of the coke cake;
and the quality determining module is used for acquiring the test result of the coke product when the coke maturity is predicted and/or verified to meet the requirement, and determining the actual value of the coke quality according to the test result of the coke product.
Optionally, in this embodiment, the coke oven status parameters include: the temperature measurement temperature of a standard flame path, the return pressure of coke oven gas, the suction force of a coke side branch flue of a coke oven machine, the coke side flow of a blast furnace gas machine and the temperature of raw coke gas.
Optionally, in this embodiment, the heating control module is specifically configured to:
and adjusting the return pressure of the coke oven gas, the suction force of a coke side branch flue of the coke oven machine and the flow of the coke side of the blast furnace gas machine by adopting a fuzzy control algorithm according to the acquired temperature measurement temperature of the standard flame path, and controlling the fluctuation of the standard temperature of the coke oven within a preset range.
Optionally, in this embodiment, the maturity prediction module specifically includes:
the fire drop time calculation unit is used for calculating the fire drop time according to the acquired raw coke oven gas temperature;
the smoldering time calculating unit is used for calculating smoldering time according to the fire falling time and the planned coke pushing time;
and the maturity prediction unit is used for predicting the maturity of the coke according to the braising time.
Optionally, in this embodiment, the system further includes:
and the adjusting module is used for increasing the heating temperature and/or increasing the stewing time when the maturity predicting module predicts that the coke maturity does not meet the requirement until the predicted coke maturity meets the requirement.
Optionally, in this embodiment, the system further includes:
and the data storage module is used for storing the coal, the coal blending scheme, the small coke oven test, the coking process temperature control and the pre-coke-pushing fire drop data in a coking production management system database in a correlation manner with the coke cake temperature and the test result of the coke product in the coke pushing process. The embodiment of the present invention further provides a computer readable storage medium, which includes instructions, when the instructions are executed on a computer, the computer is caused to execute the method steps in the above method embodiments; or store instructions corresponding to various software modules of the above-described system embodiments.
The embodiment of the present invention further provides a computer device, which includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, and when the processor executes the computer program, the method steps in the above method embodiments are implemented.
One specific application example according to an embodiment of the present invention is as follows:
the whole system consists of two independent software. And the background software is installed in an engineer station, runs in real time, processes temperature data, removes interference, and calculates the data such as the fire drop time, the stewing time, the coking index and the like of each carbonization chamber. Foreground software is installed in an operator station, displays a temperature trend curve, monitors the coking state, generates reports of fire drop time and braising time, analyzes the coking uniformity of a single coking chamber or a whole furnace, and controls the coke quality based on the system as follows:
1. the coal blending scheme shown in the following table is determined and the coke quality of the product is predicted through the manual recheck of coal blending system experts, coal blending professional engineers and small coke oven tests.
2. The turnover time of the coke oven is 19 hours, the standard temperature of the coke oven side is set to 1310 ℃ and the standard temperature of the coke side is set to 1350 ℃ according to production experience, and the oven temperature is automatically adjusted.
The automatic furnace temperature adjusting system can process automatic temperature measurement data and remove the influence of a coking period and an exchange period. The automatic temperature measurement device is matched with manual temperature measurement during production, automatic temperature measurement data are calibrated, external interference such as fouling of a lens of a thermometer, deviation of a temperature measurement point, change of an emission coefficient and the like is eliminated, and accuracy of temperature data is guaranteed. The change trend and the average temperature of the coke oven temperature can be monitored in real time through automatic temperature measurement, the fluctuation of the oven temperature can be reduced, the average oven temperature of the coke oven side is 1311 ℃, and the average oven temperature of the coke oven side is 1346 ℃.
3. Before pushing coke, the production team checks the coke fire falling condition in each carbonization chamber and determines to execute the coke pushing. The raw coke oven gas temperature trend curve according to which the fire drops are judged is shown in fig. 4, the abscissa is the specific operation time, and the ordinate is the measured raw coke oven gas temperature of the ascending pipe.
4. In the coke pushing process, the coke maturity is monitored by a coke cake temperature measuring system, the central temperature of the coke cake is 1000 +/-50 ℃ and is mature coke, and the maturity uniformity of the coke is determined by an upper point, a middle point and a lower point, which are shown in the following table. And when the range is exceeded, the system gives an alarm prompt.
5. And extracting a product sample for testing according to the production factors of the coal blending batch and the team. As can be seen from the table below, the actual product quality is substantially consistent with the predicted value.
6. Analyzing the whole-process coking production process, the coal blending is basically stable and feasible, and under the condition that the standard temperature of the coking furnace is basically stable, the coke of an individual furnace number is over-cooked, and the coke falling time period of the individual furnace number can influence the quality of the whole batch coke, and the temperature of the transverse row needs to be adjusted in detail.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A method for controlling coke quality in the whole coking process is characterized by comprising the following steps:
judging the feasibility of a coal blending scheme through a small coke oven test, and performing coal blending operation according to the judged coal blending scheme;
acquiring coke oven state parameters detected in the coking process;
controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the coke oven state parameters;
and predicting the maturity of the coke according to the state parameters of the coke oven, acquiring the test result of the coke product when the predicted maturity of the coke meets the requirement, and determining the actual value of the coke quality according to the test result of the coke product.
2. The method for controlling the quality of coke in the whole coking process according to claim 1, further comprising: acquiring the temperature of a coke cake in the coke pushing process, and verifying whether the maturity of the coke meets the requirement according to the temperature of the coke cake;
and when the coke maturity is predicted and/or verified to meet the requirement, acquiring the test result of the coke product, and determining the actual value of the coke quality according to the test result of the coke product.
3. The method of claim 1, wherein the coke oven state parameters comprise: the temperature measurement temperature of a standard flame path, the return pressure of coke oven gas, the suction force of a coke side branch flue of a coke oven machine, the flow of the coke side of a blast furnace gas machine and the temperature of crude gas.
4. The method for controlling the quality of the coke in the whole coking process according to claim 3, wherein the controlling of the standard temperature fluctuation of the coke oven within a preset range according to the coke oven state parameters specifically comprises:
and adjusting the return pressure of the coke oven gas, the suction force of a coke side branch flue of the coke oven machine and the flow of a coke side of the blast furnace gas machine by adopting a fuzzy control algorithm according to the acquired temperature measurement temperature of the standard flame path, and controlling the fluctuation of the standard temperature of the coke oven within a preset range.
5. The method for controlling coke quality in the whole coking process according to claim 3, wherein the predicting the coke maturity according to the coke oven state parameters specifically comprises:
calculating the fire falling time according to the obtained temperature of the raw gas;
calculating the smoldering time according to the fire falling time and the planned coke pushing time;
and predicting the coke maturity according to the braising time.
6. The method for controlling the quality of coke in the whole coking process according to any one of claims 1 to 5, further comprising: and when the predicted coke maturity does not meet the requirement, increasing the heating temperature and/or increasing the stewing time until the predicted coke maturity meets the requirement.
7. The method for controlling the quality of coke in the whole coking process according to any one of claims 1 to 5, further comprising:
and storing the coal, the coal blending scheme, the small coke oven test, the temperature control of the coking process and the fire drop data before coke pushing in a coking production management system database in a correlation way with the coke cake temperature and the test result of the coke product in the coke pushing process.
8. A system for controlling coke quality in the whole coking process is characterized by comprising:
the coal blending module is used for judging the feasibility of a coal blending scheme through a small coke oven test and performing coal blending operation according to the judged coal blending scheme;
the parameter acquisition module is used for acquiring the coke oven state parameters detected in the coking process;
the heating control module is used for controlling the fluctuation of the standard temperature of the coke oven within a preset range according to the coke oven state parameters;
the maturity prediction module is used for predicting the maturity of the coke according to the state parameters of the coke oven;
and the quality determining module is used for acquiring the test result of the coke product when the maturity predicting module predicts that the coke maturity meets the requirement, and determining the actual value of the coke quality according to the test result of the coke product.
9. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1 to 7 when executing the program.
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