CN109575971B - Experimental method for predicting quality of coke at different height positions in coke oven - Google Patents
Experimental method for predicting quality of coke at different height positions in coke oven Download PDFInfo
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Abstract
The invention discloses an experimental method for predicting the quality of coke at different height positions in a coke oven, which comprises the steps of obtaining the height H from a coal charging port to the bottom of a coking chamber of the coke oven to be tested, the conventional coal charging height H and the average width d of the coking chamber; determining the height h and the width d of the experimental coal charging container; determining theThe distance h' between the actual coal charging port of the coke oven and the coal line after coal leveling is produced by the experimental coal charging container; obtaining the total charging bulk density rho in the experimental coal charging container; determining the height h of the location to be investigated from the base1To obtain h1Bulk density ρ1(ii) a Carrying out a coking experiment, and establishing a corresponding relation between experimental coke and production coke after accurately controlling the bulk density of each section to be the same as the total charging bulk density rho; the bulk density of each section is accurately controlled to be h1Bulk density ρ1After the same, obtaining the strength index of the experimental coke, and obtaining the height h between the position to be researched and the bottom through the corresponding relation between the experimental coke and the production coke1The index of coke production is controlled.
Description
Technical Field
The invention relates to the technical field of coking, in particular to an experimental method for predicting the quality of coke at different height positions in a coke oven.
Background
The top-mounted coke oven is characterized in that coking mixed coal is controlled to continuously fall by gravity from a coal charging port at the top of the coke oven, then a coal leveling rod enters a coking chamber and extends forwards along the top of the coking chamber until reaching the coke side, and finally the purposes of filling, tightly mounting and flatly mounting are achieved. However, because the gravity fall coal charging mode is adopted, the bottom coking coal is continuously extruded and impacted by the upper part, and the phenomenon that the bulk density in the coal cake is gradually reduced from the bottom to the top of the furnace is caused.
In the process of implementing the technical scheme of the invention in the embodiment of the present application, the inventor of the present application finds that the above-mentioned technology has at least the following technical problems:
the bulk density has a great influence on coke strength indexes, and conventional coke index detection aims at a whole furnace, has randomness, cannot accurately sample a certain part, and cannot obtain the performance difference of coke at different height positions of a coke furnace.
Disclosure of Invention
The embodiment of the application provides an experimental method for predicting the quality of coke at different height positions in a coke oven, solves the problems that accurate sampling cannot be carried out at a certain part and the performance difference of coke at different height positions of the coke oven can not be obtained in the prior art, and can achieve the function of predicting the strength indexes of the coke in the coke ovens of different models along the height direction.
The embodiment of the application provides an experimental method for predicting the quality of coke at different height positions in a coke oven, which comprises the following steps: obtaining the height H of the coke oven to be measured from a coal charging port to the bottom of the coking chamber, the conventional coal charging height H and the average width d of the coking chamber; determining the height h and the width d of an experimental coal charging container according to the size of the coke oven to be detected, wherein the width of the experimental coal charging container is the same as the average width of the coking chamber of the coke oven to be detected; determining the distance H' between the actual coal charging port of the experimental coal charging container production coke oven and the coal line after coal leveling to be H-H; freely charging production coal into the experimental coal charging container at the position h' of the experimental coal charging container and just filling the experimental coal charging container, and obtaining the total charging bulk density rho in the experimental coal charging container through calculation; determining the height h of the location to be investigated from the base1At said height h by means of a sampling device1Taking a sample according to the volume V of the sampling device1And the mass m of the experimental coal in the experimental coal charging container1To obtain h1Bulk density ρ1(ii) a Performing a coking experiment, accurately controlling the bulk density of each section to be the same as the total charging bulk density rho, obtaining experimental coke crushing strength M40, abrasion resistance M10, reactivity CRI and post-reaction strength CSR, and comparing and dividing the experimental coke crushing strength M40', the abrasion resistance M10', the reactivity CRI ' and the post-reaction strength CSR ' with the production coke crushing strength M40', the abrasion resistance M10', the reactivity CRI ' and the post-reaction strength CSRAnalyzing and establishing a corresponding relation between experimental coke and production coke; the bulk density of each section is accurately controlled to be h1Bulk density ρ1After the same, obtaining the strength index of the experimental coke, and obtaining the height h between the position to be researched and the bottom through the corresponding relation between the experimental coke and the production coke1The index of coke production is controlled.
Preferably, the length of the coal charging container in the method is more than or equal to 1 meter.
Preferably, the freely charging and just filling the production coal into the experimental coal charging container at the experimental coal charging container h' comprises: a belt conveyor is built on a platform at the upper part h' of the experimental coal charging container, and experimental coal is freely charged into the container according to the speed v; and stopping coal charging when the experimental coal overflows from the upper part of the container, and removing the experimental coal higher than the upper edge of the container, wherein downward pressure is not applied in the process of removing the experimental coal higher than the upper edge of the container.
Preferably, the running speed v of the belt conveyor is the same as the blanking speed of a single coal charging opening of the coke oven to be tested.
Preferably, the performing of the coking experiment, the accurately controlling the bulk density of each section to be the same as the total charging bulk density ρ, specifically comprises: and (3) carrying out a coking experiment by using an experimental coke oven, loading experimental coal into the coal loading paper box in sections, and accurately controlling the bulk density of each section to be the same as the total charging bulk density rho.
Preferably, the corresponding relationship between the experimental coke and the production coke is as follows:
M40'＝M40+a1；
M10'＝M10+a2；
CRI'＝CRI+a3；
CSR'＝CSR+a4；
wherein, a1、a2、a3、a4Respectively, different coefficients; a is1＝3～4、a2＝-1.25～-1、a3＝-3～-2.5、a4＝5～7。
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the height H of a coke oven to be measured from a coal charging port to the bottom of a carbonization chamber, the conventional coal charging height H and the average width d of the carbonization chamber are obtained; determining the height h and the width d of an experimental coal charging container according to the size of the coke oven to be detected, wherein the width of the experimental coal charging container is the same as the average width of the coking chamber of the coke oven to be detected; determining the distance H' between the actual coal charging port of the experimental coal charging container production coke oven and the coal line after coal leveling to be H-H; freely charging production coal into the experimental coal charging container at the position h' of the experimental coal charging container and just filling the experimental coal charging container, and obtaining the total charging bulk density rho in the experimental coal charging container through calculation; determining the height h of the location to be investigated from the base1At said height h by means of a sampling device1Taking a sample according to the volume V of the sampling device1And the mass m of the experimental coal in the experimental coal charging container1To obtain h1Bulk density ρ1(ii) a Performing a coking experiment, accurately controlling the bulk density of each section to be the same as the total charging bulk density rho, obtaining the crushing strength M40, the wear resistance M10, the reactivity CRI and the post-reaction strength CSR of the experimental coke, performing comparative analysis on the crushing strength M40', the wear resistance M10', the reactivity CRI 'and the post-reaction strength CSR', and establishing the corresponding relation between the experimental coke and the production coke; the bulk density of each section is accurately controlled to be h1Bulk density ρ1After the same, obtaining the strength index of the experimental coke, and obtaining the height h between the position to be researched and the bottom through the corresponding relation between the experimental coke and the production coke1The index of coke production is controlled. The method solves the problems that accurate sampling can not be carried out at a certain part and the performance difference of cokes at different height positions of a coke oven can not be obtained in the prior art, can realize the function of predicting the strength indexes of cokes in different types of coke ovens along the height direction, is used for researching the performance difference and the change rule of the cokes produced by a top-loading coke oven in the height direction, and provides optimization measures for the optimization of the prior coal charging process on the basis of the performance difference and the change rule.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
FIG. 1 is a schematic flow chart of an experimental method for predicting the quality of coke at different height positions in a coke oven according to an embodiment of the present invention.
Detailed Description
The embodiment of the application provides an experimental method for predicting the quality of cokes at different height positions in a coke oven, which is used for solving the technical problems that accurate sampling cannot be carried out at a certain part and the performance difference of the cokes at different height positions of the coke oven cannot be obtained in the prior art.
In order to solve the technical problems, the technical scheme provided by the application has the following general idea: obtaining the height H of a coke oven to be tested from a coal charging port to the bottom of a carbonization chamber, the conventional coal charging height H and the average width d of the carbonization chamber; determining the height h and the width d of an experimental coal charging container according to the size of the coke oven to be detected, wherein the width of the experimental coal charging container is the same as the average width of the coking chamber of the coke oven to be detected; determining the distance H' between the actual coal charging port of the experimental coal charging container production coke oven and the coal line after coal leveling to be H-H; freely charging production coal into the experimental coal charging container at the position h' of the experimental coal charging container and just filling the experimental coal charging container, and obtaining the total charging bulk density rho in the experimental coal charging container through calculation; determining the height h of the location to be investigated from the base1At said height h by means of a sampling device1Taking a sample according to the volume V of the sampling device1And the mass m of the experimental coal in the experimental coal charging container1To obtain h1Bulk density ρ1(ii) a Performing a coking experiment, accurately controlling the bulk density of each section to be the same as the total charging bulk density rho, obtaining the crushing strength M40, the wear resistance M10, the reactivity CRI and the post-reaction strength CSR of the experimental coke, performing comparative analysis on the crushing strength M40', the wear resistance M10', the reactivity CRI 'and the post-reaction strength CSR', and establishing the corresponding relation between the experimental coke and the production coke; accurately controlling the bulk density of each section toh1Bulk density ρ1After the same, obtaining the strength index of the experimental coke, and obtaining the height h between the position to be researched and the bottom through the corresponding relation between the experimental coke and the production coke1The index of coke production is controlled. The method can realize the prediction function of coke strength indexes in the height direction in the coke ovens with different models, is used for researching the performance difference and the change rule of the coke produced by the top-loading coke oven in the height direction, and can provide optimization measures for the optimization of the current coal charging process on the basis of the performance difference and the change rule.
The technical solutions of the present application are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present application are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
Example one
As shown in fig. 1, an embodiment of the present application provides an experimental method for predicting the quality of coke at different height positions in a coke oven, which includes:
step 110: obtaining the height H of the coke oven to be measured from a coal charging port to the bottom of the coking chamber, the conventional coal charging height H and the average width d of the coking chamber;
step 120: determining the height h and the width d of an experimental coal charging container according to the size of the coke oven to be detected, wherein the width of the experimental coal charging container is the same as the average width of the coking chamber of the coke oven to be detected; determining the distance H' between the actual coal charging port of the experimental coal charging container production coke oven and the coal line after coal leveling to be H-H;
further, the length of the coal container in the method is more than or equal to 1 meter.
Specifically, in the embodiment, the length of the coal charging container in the method is 2 meters, and the width and the height of the coal charging container can be adjusted according to different sizes of the coke oven carbonization chambers.
Step 130: freely charging production coal into the experimental coal charging container at the position h' of the experimental coal charging container and just filling the experimental coal charging container, and obtaining the total charging bulk density rho in the experimental coal charging container through calculation;
further, the freely charging and just filling the experimental coal charging container with the production coal at the experimental coal charging container h' comprises: a belt conveyor is built on a platform at the upper part h' of the experimental coal charging container, and experimental coal is freely charged into the container according to the speed v; and stopping coal charging when the experimental coal overflows from the upper part of the container, and removing the experimental coal higher than the upper edge of the container, wherein downward pressure is not applied in the process of removing the experimental coal higher than the upper edge of the container.
Further, the running speed v of the belt conveyor is the same as the blanking speed of a single coal charging opening of the coke oven to be detected.
Specifically, the production coal stated in the embodiment of this application refers to the coal that is used for actual production, and the experiment coal is for being used in the experiment, production coal and experiment coal are same kind of coal, and here only for distinguishing two kinds of circumstances of actual production and experiment, in order to make the coal freely fall into the container under the effect of gravity, and just fill in the container, stop the coal-charging when the experiment coal spills over from the container upper portion, scrape the coal sample that exceeds the container upper edge gently with the scraper blade, do not exert decurrent pressure at this in-process to guarantee the accuracy of the bulk density that obtains of calculation, the interference of getting rid of external force.
Step 140: determining the height h of the location to be investigated from the base1At said height h by means of a sampling device1Taking a sample according to the volume V of the sampling device1And the mass m of the experimental coal in the experimental coal charging container1To obtain h1Bulk density ρ1；
Step 150: performing a coking experiment, accurately controlling the bulk density of each section to be the same as the total charging bulk density rho, obtaining the crushing strength M40, the wear resistance M10, the reactivity CRI and the post-reaction strength CSR of the experimental coke, performing comparative analysis on the crushing strength M40', the wear resistance M10', the reactivity CRI 'and the post-reaction strength CSR', and establishing the corresponding relation between the experimental coke and the production coke;
further, the performing of the coking experiment, the accurately controlling the bulk density of each section to be the same as the total charging bulk density ρ, specifically includes: and (3) carrying out a coking experiment by using an experimental coke oven, loading experimental coal into the coal loading paper box in sections, and accurately controlling the bulk density of each section to be the same as the total charging bulk density rho.
Further, the corresponding relationship between the experimental coke and the production coke is as follows:
M40'＝M40+a1；
M10'＝M10+a2；
CRI'＝CRI+a3；
CSR'＝CSR+a4；
wherein, a1、a2、a3、a4Respectively, different coefficients; a is1＝3～4、a2＝-1.25～-1、a3＝-3～-2.5、a4＝5～7。
Specifically, in the embodiment of the application, a 300kg experiment coke oven is used for carrying out a coking experiment, a coal charging carton is charged with coal samples in sections, the coal charging height of the carton is 1 m, the coal charging amount of each section is the same, and the coal charging amount of each section is strictly controlled. Accurately controlling the bulk density rho of each section of bulk density total furnace loading to be the same; obtaining crushing strength M40, abrasion resistance M10, reactivity CRI and post-reaction strength CSR of experimental coke through a plurality of groups of coking experiments, comparing and analyzing the crushing strength M40, the abrasion resistance M10, the reactivity CRI and the post-reaction strength CSR with production coke indexes M40', M10', CRI 'and CSR' to obtain conversion formulas corresponding to the crushing strength M40, the abrasion resistance M10, the reactivity CRI and the post-reaction strength CS1、a2、a3、a4The coefficients are different coefficients respectively, and the value of each coefficient is summarized through multiple tests and the value range of each coefficient is obtained through averaging.
Step 160: the bulk density of each section is accurately controlled to be h1Bulk density ρ1After the same, obtaining the strength index of the experimental coke, and obtaining the height h between the position to be researched and the bottom through the corresponding relation between the experimental coke and the production coke1The index of coke production is controlled.
Specifically, the step 150 is repeated, namely the coal filling paper box is filled with the coal sample in sections, the coal filling height of the paper box is 1 meter, the coal filling amount of each section is strictly controlled for 5 times of coal filling, the coal filling amount of each section is the same, and the bulk density and h of each section are accurately controlled1Bulk density ρ1After the same, the bulk density at each stage is obtained as rho1The coke strength index under the condition of (1) is substituted into a corresponding calculation formula to obtain the distance h between the production coke oven and the bottom of the carbonization chamber1And processing coke indexes. Therefore, the function of predicting the strength indexes of the coke in the height direction in the coke ovens with different models can be realized, the performance difference and the change rule of the coke produced by the top-loading coke oven in the height direction can be researched, and the optimization measures can be provided for the optimization of the current coal charging process on the basis of the performance difference and the change rule.
Example two
In order to more clearly describe the embodiment of the invention, a 7.63 m coke oven will be described as an example.
Step 110: the height of the coke oven with the length of 7.63 meters from the coal charging port to the bottom of the coking chamber is about 9 meters, the conventional coal charging height is 7 meters, and the average width of the coking chamber is 590 mm;
step 120: designing the height of an experimental coal charging container to be 9 meters and the width to be 590mm, wherein the distance h' between an actual coal charging port and a coal leveling line is 2 meters;
step 130: a belt conveyor is built on a platform 2 meters above the experimental coal charging container, and the production coal is freely charged into the container at a certain speed; stopping charging coal when the produced coal overflows from the upper part of the container, slightly scraping off a coal sample higher than the upper edge of the container by using a scraper, and calculating the total coal charging amount m in the container without applying downward pressure in the process, wherein the total charging bulk density rho in the coke oven can be obtained by knowing the volume V of the experimental coal charging container;
step 140: selecting the height h of the location to be investigated from the bottom1Then opening the sampling port reserved on the side wall according to the volume V of the sampling device1And mass m of the internal coal sample1To obtain a height h from the bottom1Bulk density ρ1；
Step 150: and establishing a corresponding relation between the experimental coke and the production coke. Carrying out a coking experiment by using a 300kg experiment coke oven, loading coal samples into a coal loading carton in sections, and accurately controlling the bulk density of each section to rho; selecting more than 10 groups of different coal blending schemes of the coke oven for years, carrying out a coking experiment to obtain crushing strength M40, wear resistance M10, reactivity CRI and post-reaction strength CSR of all experimental cokes, and carrying out comparative analysis on indexes M40', M10', CRI 'and CSR' of produced cokes to obtain corresponding conversion formulas of the indexes.
Step 160: study of height h from bottom1And processing the coke quality. Repeating the step 5 to accurately control the bulk density of each section to rho1The coke strength index under the condition is obtained and is substituted into a corresponding calculation formula to obtain the distance h between the production coke oven and the bottom of the carbonization chamber1And processing coke indexes.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the height H of a coke oven to be measured from a coal charging port to the bottom of a carbonization chamber, the conventional coal charging height H and the average width d of the carbonization chamber are obtained; determining the height h and the width d of an experimental coal charging container according to the size of the coke oven to be detected, wherein the width of the experimental coal charging container is the same as the average width of the coking chamber of the coke oven to be detected; determining the distance H' between the actual coal charging port of the experimental coal charging container production coke oven and the coal line after coal leveling to be H-H; freely charging production coal into the experimental coal charging container at the position h' of the experimental coal charging container and just filling the experimental coal charging container, and obtaining the total charging bulk density rho in the experimental coal charging container through calculation; determining the height h of the location to be investigated from the base1At said height h by means of a sampling device1Taking a sample according to the volume V of the sampling device1And the mass m of the experimental coal in the experimental coal charging container1To obtain h1Bulk density ρ1(ii) a Performing a coking experiment, accurately controlling the bulk density of each section to be the same as the total charging bulk density rho, obtaining the crushing strength M40, the wear resistance M10, the reactivity CRI and the post-reaction strength CSR of the experimental coke, performing comparative analysis on the crushing strength M40', the wear resistance M10', the reactivity CRI 'and the post-reaction strength CSR', and establishing the corresponding relation between the experimental coke and the production coke; the bulk density of each section is accurately controlled to be h1Bulk density ρ1After the same, obtaining the strength index of the experimental coke, and obtaining the height h between the position to be researched and the bottom through the corresponding relation between the experimental coke and the production coke1The index of coke production is controlled. Solves the problems in the prior artThe method has the advantages that accurate sampling can not be carried out on a certain part, and the performance difference of cokes at different height positions of a coke oven can not be obtained, so that the function of predicting the strength indexes of cokes in different types of coke ovens along the height direction can be realized, the performance difference and the change rule of the cokes produced by a top-loading coke oven in the height direction can be researched, and optimization measures can be provided for the optimization of the existing coal charging process on the basis of the performance difference and the change rule.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (6)
1. An experimental method for predicting the quality of coke at different height locations within a coke oven, the method comprising:
obtaining the height H of the coke oven to be measured from a coal charging port to the bottom of the coking chamber, the conventional coal charging height H and the average width d of the coking chamber;
determining the height h and the width d of an experimental coal charging container according to the size of the coke oven to be detected, wherein the width of the experimental coal charging container is the same as the average width of the coking chamber of the coke oven to be detected; determining the distance H' between the actual coal charging port of the experimental coal charging container production coke oven and the coal line after coal leveling to be H-H;
freely charging production coal into the experimental coal charging container at the position h' of the experimental coal charging container and just filling the experimental coal charging container, and obtaining the total charging bulk density rho in the experimental coal charging container through calculation;
determining the height h of the location to be investigated from the base1At said height h by means of a sampling device1Is sampled at the rootAccording to the volume V of the sampling device1And the mass m of the experimental coal in the experimental coal charging container1To obtain h1Bulk density ρ1；
Performing a coking experiment, accurately controlling the bulk density of each section to be the same as the total charging bulk density rho, obtaining the crushing strength M40, the wear resistance M10, the reactivity CRI and the post-reaction strength CSR of the experimental coke, performing comparative analysis on the crushing strength M40', the wear resistance M10', the reactivity CRI 'and the post-reaction strength CSR', and establishing the corresponding relation between the experimental coke and the production coke;
the bulk density of each section is accurately controlled to be h1Bulk density ρ1After the same, obtaining the strength index of the experimental coke, and obtaining the height h between the position to be researched and the bottom through the corresponding relation between the experimental coke and the production coke1The index of coke production is controlled.
2. The experimental method of claim 1, wherein the experimental coal charging vessel has a length of 1 m or more.
3. The experimental method of claim 1, wherein said freely charging and just filling the experimental coal charging container with production coal at the experimental coal charging container h' comprises:
a belt conveyor is built on a platform at the upper part h' of the experimental coal charging container, and experimental coal is freely charged into the container according to the speed v; and stopping coal charging when the experimental coal overflows from the upper part of the container, and removing the experimental coal higher than the upper edge of the container, wherein downward pressure is not applied in the process of removing the experimental coal higher than the upper edge of the container.
4. The experimental method of claim 3, wherein the running speed v of the belt conveyor is the same as the blanking speed of the single coal charging port of the coke oven to be tested.
5. The method of claim 1, wherein the step of performing the coking test while precisely controlling the bulk density of each stage to be the same as the total charged bulk density p comprises:
and (3) carrying out a coking experiment by using an experimental coke oven, loading experimental coal into the coal loading paper box in sections, and accurately controlling the bulk density of each section to be the same as the total charging bulk density rho.
6. The experimental method of claim 1, wherein said experimental coke corresponds to production coke by:
M40'＝M40+a1；
M10'＝M10+a2；
CRI'＝CRI+a3；
CSR'＝CSR+a4；
wherein, a1、a2、a3、a4Respectively, different coefficients;
a1＝3～4、a2＝-1.25～-1、a3＝-3～-2.5、a4＝5～7。
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