Method for detecting and treating disqualification of coal charging quantity of coke oven carbonization chamber

Abstract

The invention relates to the technical field of coking, in particular to a coke oven carbonization chamber coal loading quantity disqualification detection and treatment method which comprises the following steps: detecting the temperature of a coke cake in the coke discharging process of a coke oven through a temperature measuring device mounted on a coke guide grid of a coke barrier car; recording the temperature of the coke cake by taking the alignment information of the coke guide grid of the coke barrier car and the furnace door as starting and ending time; according to the temperature of the coke cake, judging whether coaling unfilled corners exist in the current carbonization chamber or not; when the coal charging unfilled corner exists in the carbonization chamber, the specific position of the coal charging unfilled corner is judged according to the distance between the coal charging hole and the machine side furnace door; and coal loading unfilled corner detection is realized. According to the method, specific coal charging is performed by judging the specific position of the coal charging unfilled corner, so that the coal charging uniformity of the coke oven carbonization chamber is improved.

Description

Technical Field

[0001] This invention relates to the field of coking technology, and in particular to a method for detecting and handling substandard coal loading in the carbonization chamber of a coke oven. Background Technology

[0002] The top-loading coke oven coal charging operation has a low degree of automation. Controlling the coal charging car screw conveyor rotation speed requires concentration and quick reaction. It is necessary to quickly and manually control the different rotation speeds of the four coal charging holes. However, repeated operation over a long period of time will result in different coal charging rotation speeds for different shifts, and even for the same person in the same shift. If the coal charging rotation speed of a certain coal charging hole is insufficient, a groove will appear on the upper end face of the coal in the coke oven carbonization chamber after coal charging is completed. This is the main reason for the unqualified coal charging amount in the coke oven carbonization chamber. However, in actual production, it is impossible to monitor and detect the coal charging corner problem. At the same time, the original design of the screw coal charging rotation speed control can only control the rotation speed in integer multiples, with an average coal charging amount of about 122 kg per rotation, which is not conducive to improving coal charging accuracy.

[0003] During the actual coal leveling process in the coke oven, as the leveling rod levels the coal in the third and fourth charging holes, the head of the leveling rod will gradually droop under the influence of gravity due to the loss of the support of the balance guide wheel, forming a certain angle with the horizontal line. The more the leveling rod enters the furnace, the more severe the drooping becomes, which will cause the actual effective height loss of coal charging in the coke side carbonization chamber along the machine side to continuously increase, resulting in a reduction in the effective coal charging amount in the height direction of the carbonization chamber.

[0004] The above reasons have resulted in a coal loading qualification rate of only 30% to 50% for single-hole carbonization chambers in top-loading coke ovens, causing great trouble to coke oven production and urgently requiring a solution. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a method for detecting and processing the qualified rate of coal charging in the coking chamber of a coke oven. This invention detects the temperature of the coke cake during the coking process and uses temperature fluctuations to determine whether there is a missing corner in the coal charging within the coking chamber. Furthermore, it optimizes the coal leveling operation and the coal charging car screw conveyor rotation speed control program to achieve fixed and non-integer rotation speeds for each charging hole.

[0006] The technical means employed in this invention are as follows: A method for detecting and handling unqualified coal charging in a coke oven carbonization chamber includes: detecting the coke cake temperature during the coke oven discharge process using a temperature measuring device installed on the coke guide grid of the coke quenching car; recording the coke cake temperature using the alignment information between the coke guide grid of the coke quenching car and the oven door as the start and end time; determining whether there is a coal charging gap in the current carbonization chamber based on the coke cake temperature; when there is a coal charging gap in the carbonization chamber, determining the specific location of the coal charging gap based on the distance between the coal charging hole and the oven door on the machine side; and after determining the specific location of the coal charging gap, increasing the spiral coal charging speed of the corresponding coal charging hole.

[0007] Furthermore, the installation height of the temperature measuring device is based on the bottom of the carbonization chamber, with an upward height H; the height H is calculated as follows:

[0008] in, The height of the carbonization chamber, The height of the coke oven roof space. The value is in the range of 0mm-200mm.

[0009] Furthermore, the method of recording the coke cake temperature using the alignment information between the coke guide grid of the coke quenching car and the furnace door as the start and end time specifically includes: When the alignment information between the coke guide grid of the coke quenching car and the furnace door exists, and the coke cake temperature is... At that time, the starting point for recording the temperature of the burnt cake was... When the alignment information between the coke guide grid of the coke quenching car and the furnace door is not available, this marks the end point for recording the coke cake temperature. .

[0010] Furthermore, the step of determining whether there is a missing corner in the coal loading in the current carbonization chamber based on the coke cake temperature specifically includes: When the temperature of the caramel Then there will be no missing corners in the coal loading process; When the temperature of the caramel When the number of temperature points exceeds the threshold, it indicates that the amount of coal charged in the coke oven carbonization chamber is insufficient, i.e., the amount of coal charged is unqualified.

[0011] Furthermore, determining the specific location of the missing coal charging angle based on the distance between the coal charging hole and the furnace door on the machine side specifically includes: The starting point of the temperature point where the coal loading in the carbonization chamber is insufficient is represented as: The endpoint of the temperature point is represented as , The distance between the coal charging hole and the furnace door on the machine side ranges from [(N- )]÷N×L to [(N- There is a missing corner phenomenon in the range between )]÷N×L, where L is the length of the coke oven carbonization chamber; When [(N- )]÷N×L-R≤L1, the coal charging notch is between the first coal charging hole and the furnace door on the machine side; When L1≤[(N- )]÷N×L-R≤L2, the coal loading notch is located between the second coal loading hole and the first coal loading hole; When L2≤[(N- )]÷N×L-R≤L3, the coal loading notch is located between the second and third coal loading holes; When L3≤[(N- )]÷N×L-R≤L4, the missing corner of the coal loading hole is between the third coal loading hole and the fourth coal loading hole; When [(N- )]÷N×L+2R≥L 4， The missing corner in the coal charging section is located between the fourth coal charging hole and the coke oven door on the coke side. Where L1 is the distance from the center of the first coal charging hole to the furnace door on the machine side, L2 is the distance from the center of the second coal charging hole to the furnace door on the machine side, L3 is the distance from the center of the third coal charging hole to the furnace door on the machine side, L4 is the distance from the center of the fourth coal charging hole to the furnace door on the machine side, R is the radius of the coal charging hole, and N is the total number of temperature points.

[0012] Furthermore, after determining the specific location of the missing corner in the coal charging process, increasing the spiral charging speed of the corresponding charging hole specifically includes: S1. Increase the spiral charging speed by 1 / 4 to 3 revolutions at the specific location of the missing corner in the coal charging hole; S2. Set the leveling rod stroke according to the specific location of the missing corner in the coal loading and perform the leveling operation; S3. During the coking cycle, check and determine if there is a missing corner in the coal loading process when the coke is discharged. S4. If there is a missing corner in the coal loading, repeat steps S1-S3; if there is no missing corner in the coal loading, record and fix the number of spiral coal loading revolutions corresponding to each coal loading hole.

[0013] Compared with the prior art, the present invention has the following advantages: The present invention provides a method for detecting and handling unqualified coal loading in the coke oven carbonization chamber. By determining the specific location of the missing coal corner, targeted coal loading is carried out, thereby improving the uniformity of coal loading in the coke oven carbonization chamber and realizing the effective detection of missing coal corners in the coke oven carbonization chamber.

[0014] The method for detecting and handling unqualified coal loading in the coke oven carbonization chamber provided by this invention fundamentally reduces the problem of uneven coal loading in the coke oven carbonization chamber caused by the bulk density of coking coal, and reduces the amount of residual coal carried out by the leveling rod; by precisely controlling the coal loading revolution, precise coal loading operation is achieved, thereby improving the accuracy of coal loading. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a flowchart of the method for detecting and handling unqualified coal loading in the coke oven carbonization chamber according to the present invention. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0019] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0020] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0021] like Figure 1As shown, this invention provides a method for detecting and handling substandard coal loading in the coking chamber of a coke oven, comprising: detecting the temperature of the coke cake during the coking process using a temperature measuring device installed on the coke guide grid of the coke quenching car; in a preferred embodiment of this invention, the installation height of the temperature measuring device is based on the bottom of the coking chamber and extends upwards by a height H; the height H is calculated as follows:

[0022] in, The height of the carbonization chamber, The height of the coke oven roof space. The value is in the range of 0mm-200mm.

[0023] The coke cake temperature is recorded using the alignment information between the coke guide grid of the coke quenching car and the furnace door as the start and end time. Specifically, in a preferred embodiment of this invention, the recording of the coke cake temperature using the alignment information between the coke guide grid of the coke quenching car and the furnace door as the start and end time includes: When the alignment information between the coke guide grid of the coke quenching car and the furnace door exists, and the coke cake temperature is... At that time, the starting point for recording the temperature of the burnt cake was... When the alignment information between the coke guide grid of the coke quenching car and the furnace door is not available, this marks the end point for recording the coke cake temperature. The recording interval is 0.5s to 20s.

[0024] Determining whether there is a missing corner in the coal loading chamber based on the coke cake temperature; in a preferred embodiment of the present invention, determining whether there is a missing corner in the coal loading chamber based on the coke cake temperature specifically includes: When the temperature of the caramel Then there will be no missing corners in the coal loading process; When the temperature of the caramel When the number of sustained temperature points exceeds the threshold, it indicates that the coal charge in the coke oven's carbonization chamber is insufficient. In practice, if the number of sustained temperature points reaches 5 or more, it indicates that the coal charge in the coke oven's carbonization chamber is insufficient.

[0025] When a coal charging defect exists in the carbonization chamber, the specific location of the defect is determined based on the distance between the coal charging hole and the furnace door on the machine side; this enables coal charging qualification rate detection. In a preferred embodiment of this invention, the starting point of the insufficient coal charging temperature in the carbonization chamber is represented as... The endpoint of the temperature point is represented as , The distance between the coal charging hole and the furnace door on the machine side ranges from [(N- )]÷N×L to [(N- There is a missing corner phenomenon in the range between )]÷N×L, where L is the length of the coke oven carbonization chamber; When [(N- )]÷N×L-R≤L1, the coal charging notch is between the first coal charging hole and the furnace door on the machine side; When L1≤[(N- )]÷N×L-R≤L2, the coal loading notch is located between the second coal loading hole and the first coal loading hole; When L2≤[(N- )]÷N×L-R≤L3, the coal loading notch is located between the second and third coal loading holes; When L3≤[(N- )]÷N×L-R≤L4, the missing corner of the coal loading hole is between the third coal loading hole and the fourth coal loading hole; When [(N- )]÷N×L+2R≥L 4， The missing corner in the coal charging section is located between the fourth coal charging hole and the coke oven door on the coke side. Where L1 is the distance from the center of the first coal charging hole to the furnace door on the machine side, L2 is the distance from the center of the second coal charging hole to the furnace door on the machine side, L3 is the distance from the center of the third coal charging hole to the furnace door on the machine side, L4 is the distance from the center of the fourth coal charging hole to the furnace door on the machine side, R is the radius of the coal charging hole, and N is the total number of temperature points.

[0026] After determining the specific location of the missing corner in the coal loading, the spiral loading speed of the corresponding coal loading hole is increased. In a preferred embodiment of the present invention, the steps are as follows: S1. Increase the spiral charging speed by 1 / 4 to 3 revolutions at the specific location of the missing corner in the coal charging hole; S2. Set the leveling rod stroke according to the specific location of the missing corner in the coal loading and perform the leveling operation; S3. During the coking cycle, check and determine if there is a missing corner in the coal loading process when the coke is discharged. S4. If there is a missing corner in the coal loading, repeat steps S1-S3; if there is no missing corner in the coal loading, record and fix the number of spiral coal loading revolutions corresponding to each coal loading hole.

[0027] The original design of the screw conveyor for coal loading revolutions used a counting proximity switch with a matching induction device to calculate the revolutions. The specific principle is as follows: the counting proximity switch with the matching induction device rotates together with the screw conveyor motor reducer. If the proximity switch detects 4 signals, the screw conveyor for coal loading revolutions is recorded as 1 revolution.

[0028] The control program was modified so that each signal detected by the proximity switch counts as one revolution, thus enabling precise control of the screw conveyor's coal loading revolution to achieve 1 / 4 of the actual screw revolution.

[0029] Example This embodiment describes the specific implementation steps for improving the coal loading qualification rate using the method of the present invention.

[0030] By using air separation equipment or pre-screening equipment, or by changing the number and arrangement of hammers in the crusher, the particle size composition of the blended coal can be controlled: the proportion of particles with a size of ≤0.1mm in the blended coal should be ≤20% by mass.

[0031] The front structure of the coal leveling rod was modified by changing the fixed pointed pusher to a single-sided movable gate structure. During the forward movement of the coal leveling rod, the single-sided movable gate closes to push the coal towards the coke side, and during the backward movement, the movable gate structure opens to reduce the amount of coal carried out by the coal leveling rod.

[0032] By using a proximity switch and its associated sensing device to detect the number of signals, the number of coal loading revolutions can be precisely controlled, thereby achieving precise coal loading at 1 / 2 revolution or 1 / 4 revolution of the actual screw rotation.

[0033] Based on the method for determining the specific location of the coal loading hole in the carbonization chamber with a missing corner, the number of coal loading revolutions is increased accordingly based on the number of coal loading holes corresponding to the missing corner. In the next coking cycle, if Ti ≥ 600℃, the corresponding coal charging hole's coal charging revolutions will be fixed, and the operation will end; if Ti ≤ 600℃ and the number of continuous temperature points reaches more than 5, it will indicate that the coal charging amount in the coke oven's carbonization chamber is insufficient.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting and handling substandard coal loading in a coke oven carbonization chamber, characterized in that, include: The temperature of the coke cake during the coking process is detected by a temperature measuring device installed on the coke guide grid of the coke quenching car. The coke cake temperature was recorded using the alignment information between the coke guide grid of the coke quenching car and the furnace door as the start and end time. Determine whether there are any missing corners in the coal loading in the current carbonization chamber based on the coke cake temperature; When there is a missing corner in the coal charging chamber, the specific location of the missing corner can be determined by the distance between the coal charging hole and the furnace door on the machine side. After determining the specific location of the missing corner in the coal loading, increase the spiral loading speed of the corresponding coal loading hole.

2. The method for detecting and handling substandard coal loading in the coke oven carbonization chamber according to claim 1, characterized in that, The temperature measuring device is installed at a height H above the bottom of the carbonization chamber; the height H is calculated as follows: in, The height of the carbonization chamber, The height of the coke oven roof space. The value is in the range of 0mm-200mm.

3. The method for detecting and handling substandard coal loading in the coke oven carbonization chamber according to claim 1, characterized in that, The method of recording coke cake temperature using the alignment information between the coke guide grid of the coke quenching car and the furnace door as the start and end time specifically includes: When the alignment information between the coke guide grid of the coke quenching car and the furnace door exists, and the coke cake temperature is... At that time, the starting point for recording the temperature of the burnt cake was... When the alignment information between the coke guide grid of the coke quenching car and the furnace door is not available, this marks the end point for recording the coke cake temperature. .

4. The method for detecting and handling substandard coal loading in the coke oven carbonization chamber according to claim 1, characterized in that, The method of determining whether there is a missing corner in the coal loading in the current carbonization chamber based on the coke cake temperature specifically includes: When the temperature of the caramel Then there will be no missing corners in the coal loading process; When the temperature of the caramel When the number of temperature points exceeds the threshold, it indicates that the amount of coal charged in the coke oven carbonization chamber is insufficient, i.e., the amount of coal charged is unqualified.

5. The method for detecting and handling substandard coal loading in the coke oven carbonization chamber according to claim 1, characterized in that, Determining the specific location of the missing coal charging angle based on the distance between the coal charging hole and the furnace door on the machine side specifically includes: The starting point of the temperature point where the coal loading in the carbonization chamber is insufficient is represented as: The endpoint of the temperature point is represented as , The distance between the coal charging hole and the furnace door on the machine side ranges from [(N- )]÷N×L to [(N- There is a missing corner phenomenon in the range between )]÷N×L, where L is the length of the coke oven carbonization chamber; When [(N- )]÷N×L-R≤L1, the coal charging notch is between the first coal charging hole and the furnace door on the machine side; When L1≤[(N- )]÷N×L-R≤L2, the coal loading notch is located between the second coal loading hole and the first coal loading hole; When L2≤[(N- )]÷N×L-R≤L3, the coal loading notch is located between the second and third coal loading holes; When L3≤[(N- )]÷N×L-R≤L4, the missing corner of the coal loading hole is between the third coal loading hole and the fourth coal loading hole; When [(N- )]÷N×L+2R≥L 4， The missing corner in the coal charging section is located between the fourth coal charging hole and the coke oven door on the coke side. Where L1 is the distance from the center of the first coal charging hole to the furnace door on the machine side, L2 is the distance from the center of the second coal charging hole to the furnace door on the machine side, L3 is the distance from the center of the third coal charging hole to the furnace door on the machine side, L4 is the distance from the center of the fourth coal charging hole to the furnace door on the machine side, R is the radius of the coal charging hole, and N is the total number of temperature points.

6. The method for detecting and handling substandard coal loading in the coke oven carbonization chamber according to claim 1, characterized in that, After determining the specific location of the missing corner in the coal charging process, the spiral charging speed of the corresponding coal charging hole is increased, specifically including: S1. Increase the spiral charging speed by 1 / 4 to 3 revolutions at the specific location of the missing corner in the coal charging hole; S2. Set the leveling rod stroke according to the specific location of the missing corner in the coal loading and perform the leveling operation; S3. During the coking cycle, check and determine if there is a missing corner in the coal loading process when the coke is discharged. S4. If there is a missing corner in the coal loading, repeat steps S1-S3; if there is no missing corner in the coal loading, record and fix the number of spiral coal loading revolutions corresponding to each coal loading hole.

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