Efficient coal charging method for coal charging car

Abstract

The present application relates to a kind of high-efficiency coal charging method of coal charging car, comprising: the steps of realizing material line synchronous peak, far end flat coal, near end flat coal etc.The high-efficiency coal charging method of coal charging car provided by the present application judges the profit and loss situation of material line with the volume of coal added in the process of coal charging of coal charging car, which is more beneficial to master the material line change of coal in carbonization chamber;The position of material line in carbonization chamber can be estimated, and the flat coal moment is judged;Flat coal strategy is confirmed according to the position of material line in carbonization chamber, the discharge of residual coal material is reduced, and the flat coal efficiency is improved;The number of coal charging holes of coal charging car is dynamically adjusted according to the amount of residual coal carried in different flat coal stages, and the coal charging efficiency is improved;With the highest coal charging amount as the coal charging standard value, the coal charging volume (coal charging number) of each coal charging port is distributed, the discharge of residual coal amount is reduced, which will be beneficial to improve the coal charging amount of the entire coke oven carbonization chamber and improve the coal charging efficiency of coke oven.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of coal car high-efficiency coal feeding method, belongs to metal smelting technical field. BACKGROUND

[0002] The top coke oven coal car injects the coking coal in the coal hopper from the carbonization chamber top coal hole through mechanical equipment such as screw conveyor, lets these powdered coal dry distillation form coke cake in high temperature carbonization chamber, and coal feeding process equipment such as coal car is as shown in Figure 1 And Figure 2 In the coal feeding process, the inner guide sleeve is inserted into the coal hole of the carbonization chamber, the coal feeding gate is opened, and then the coal feeding screw conveyor injects the coking coal in the coal hopper into the coke oven carbonization chamber under the drive of the coal feeding motor and the speed reducer. When the coal feeding reaches the set weight, the coal leveling operation starts, and the coal leveling rod pushes the uneven material line injected into the four coal holes to ensure that the coal feeding amount reaches the high material level of the carbonization chamber while avoiding blocking the gas duct of the gas collector. The remaining coal is pulled out from the coal leveling small oven door of the carbonization chamber, falls into the remaining coal bin on the coke pushing car through the coal leveling chute, and the collected remaining coal is returned to the coal hopper of the coal car for utilization. Under the current technical conditions, the problems encountered in the coal feeding of the coal car are:

[0003] 1. In the coal feeding process of the coal car, the coal feeding amount is uneven due to different speeds or uneven feeding of each coal hopper, and the coal amount falling into the carbonization chamber is different each time, which ultimately leads to irregular and large fluctuation of the entire coking coal material line falling into the carbonization chamber. Even in the case of the same total coal feeding amount, the amount of remaining coal brought out by the coal leveling is also different.

[0004] 2. The coal leveling operation of the coke pushing car has no interlocking relationship with the coal falling state in the carbonization chamber, and is only performed according to the coal car instructions when the coal feeding of the coal car is almost completed, which leads to a large amount of remaining coal being brought out and the coal feeding efficiency of the coal car cannot be improved.

[0005] 3. Even if quantitative coal feeding is performed using a coal hopper scale, due to changes in the coal blending process, the composition and density of the coking coal will also change. When the density of the coking coal increases, the carbonization chamber will not be filled, and when the density decreases, the material line in the carbonization chamber will be too high to block the gas duct of the gas collector, and a large amount of remaining coal will be brought out.

[0006] 4. The quality of the remaining coal pulled out during the coal leveling process will change due to the high temperature in the carbonization chamber, and the reutilization process will reduce the quality of the original coking coal, so the less the amount of remaining coal during the coal leveling process, the more beneficial it is to the improvement of the coking process. SUMMARY

[0007] The technical problem to be solved by the present application is to overcome the shortcomings of the above-mentioned technology and provide a coal car high-efficiency coal feeding method to solve the problems of low coal feeding efficiency and unstable carbonization chamber coal feeding amount.

[0008] To solve the above technical problems, the technical scheme provided by the present application is as follows: a high-efficiency coal charging method for a coal charging vehicle, comprising the following steps:

[0009] When the coal charging preparation is completed, all the No. 1 to No. 4 hoppers and the corresponding augers of the coal charging vehicle are opened synchronously and at the same speed to inject coking coal into the carbonization chamber at a fixed rotating speed; the coal charging weights of the hoppers of the coal charging vehicle in a unit time are ΔM1, ΔM2, ΔM3 and ΔM4 respectively, and the coal charging circle numbers of the augers are ΔN1, ΔN2, ΔN3 and ΔN4 respectively, and the coal charging weight and the coal charging circle number should be ensured to meet: ΔM1 / ΔN1=ΔM2 / ΔN2=ΔM3 / ΔN3=ΔM4 / ΔN4;

[0010] Supposing that the proportional coefficient of the coal charging weight and the coal charging circle number is K, K=Δ∑M / Δ∑N, wherein Δ∑M is the sum of the coal charging weights of the hoppers, and Δ∑N is the sum of the coal charging circle numbers of the hoppers;

[0011] Supposing that the ideal material line height in the carbonization chamber under ideal state is H, the bottom area of the carbonization chamber is S, and the ideal coal charging weight is M, then M=H*S*ρ=k 标准 *N, k 标准 =M / N, wherein K 标准 is the standard proportional coefficient of the coal charging weight and the coal charging circle number under the standard coal density, and N is the sum of the coal charging circle numbers of the augers under the standard coal density;

[0012] When K is less than K 标准 , it indicates that the coal density becomes smaller, and when K is greater than K 标准 , it indicates that the coal density becomes larger;

[0013] In a unit time T, if the data of any hopper appears ΔMn

[0014] If ΔMn

[0015] After the coal charging circle numbers of the augers reach the set value and the material line peak value reaches the ideal material line height H, the No. 1 and No. 2 hoppers close to the coal flat opening slow down or stop coal charging, and the No. 3 and No. 4 hoppers far from the coal flat opening continue to charge coal until the coal charging peak value exceeds the ideal material line height by 5%; at this time, the coal flat rod of the coke pushing vehicle starts to enter the carbonization chamber from the coal flat opening to perform the coal flat operation, and the action stroke positions of the coal flat rod are divided into S1 to S4 positions, wherein S1 position is at the coal flat opening position, S2 position is at the left side of the coal charging opening of the No. 2 hopper, S3 position is at the right side of the coal charging opening of the No. 3 hopper, and S4 position is at the right side of the coal charging opening of the No. 4 hopper close to the coke side furnace door position, and the lengths of S2 to S4 segments are equal to the lengths of S1 to S3 segments.

[0016] When the far-end coal leveling is performed, the end of the coal leveling rod will move back and forth between S2 and S4, which is used to level the coal peak above the ideal coal line in the carbonization chamber, and the residual coal pulled out from the residual coal opening is monitored. If the amount of the residual coal ΔMy pulled out at one time is higher than the set value, it is indicated that the coal adding amount in the present coal line synchronization peak reaching stage is too high, and the set coal adding number will be reduced in the next coal adding;

[0017] After the far-end coal leveling is completed, the coal adding in the No. 3 and No. 4 hoppers is stopped, the coke pushing car coal leveling rod will retreat to S1 position, the coal adding in the No. 1 and No. 2 hoppers is started, and the peak value of the coal adding is higher than the ideal coal line height by 5%. The end of the coal leveling rod will move back and forth between S1 and S3, which is used to level the coal peak above the ideal coal line. After the residual coal ΔMy pulled out by the coal leveling rod reaches the threshold value, the coke pushing car will inform the coal adding car to stop the coal adding, and the coal leveling rod performs a complete stroke of the coal leveling.

[0018] The above scheme is further improved in that: after the coal adding and the coal leveling in the coke oven carbonization chamber are completed, the total coal adding weight Δ∑M, the total coal adding number Δ∑N and the total residual coal amount My of the present carbonization chamber are calculated. By calculating the different coal adding amounts of the same coal in the carbonization chamber, the maximum value of the coal adding weight that can be reached by the carbonization chamber (Δ∑M-My)max is obtained, which is used as the optimal coal adding standard of the present coal, and the total coal adding number at this time (Δ∑N)max is also obtained. The total coal adding number is decomposed to each auger, and the coal adding number allocated to each auger will be (Δ∑N)max / 4. The coal adding number of each auger when the coal line synchronization reaches the peak will be η*(Δ∑N)max / 4, wherein η is a synchronization coefficient, and the value range is 0.80-0.95.

[0019] The above scheme is further improved in that: before the far-end coal leveling is performed, the No. 3 and No. 4 hoppers continue to add coal, and the coal adding number is [1-η]*(Δ∑N)max / 4. Then, the coke pushing car coal leveling rod starts the far-end coal leveling stage operation, and the end of the coal leveling rod will move back and forth between S2 and S4 to the set number of times to return to S1 position. At this time, the residual coal weighing system measures the residual coal amount ΔMy pulled out this time. If it is higher than the set value, it is judged that the coal adding set number η*(Δ∑N)max / 4 of all the hoppers is too high, and the coal adding number of each hopper in the next time will be set as η*(Δ∑N)max / 4-ΔMy / (J*4)=η*(Δ∑N)max / 4-ΔNy / 4. J is a residual coal amount adjustment coefficient, and ΔNy is the total coal adding number reduced in the far-end coal leveling stage. The more the residual coal amount pulled out, the less the coal adding number of each coal adding opening when the coal line synchronization reaches the peak will be set in the next time.

[0020] The further improvement of the above scheme is that: before the near-end coal leveling, the No. 1 and No. 2 coal hoppers continue to feed coal, and the coal feeding circle number is [1-η]*(Δ∑N)max / 4, then the coke pushing vehicle starts to carry out the near-end coal leveling stage operation, the end of the coal leveling rod will move back and forth between S1 and S3 to the set number of times and return to the S1 position, and finally, the complete coal leveling operation from S1 to S4 area is carried out again, at this time, the residual coal weighing system measures the residual coal quantity ΔMy pulled out this time, if it is higher than the set value, it is judged that the coal feeding set circle number (1-η)*(Δ∑N)max / 4 of the coal feeding port in the coal leveling stage is too high, and the next time the coal feeding circle number of the No. 1 and No. 2 coal hoppers will be set as (1-η)*(Δ∑N)max / 4-ΔMy / (J*2)+ΔNy / 4; J is a residual coal quantity adjustment coefficient, the more residual coal quantity pulled out, the less coal feeding circle number set in the next near-end coal leveling.

[0021] The coal feeding vehicle efficient coal feeding method provided by the application judges the material line profit and loss by the volume of the added coal in the coal feeding vehicle coal feeding process, which is more conducive to mastering the material line change in the carbonization chamber; the material line position in the carbonization chamber can be estimated, and the coal leveling time can be judged; the coal leveling strategy is confirmed according to the material line position in the carbonization chamber, the residual coal material discharge is reduced, and the coal leveling efficiency is improved; the residual coal quantity pulled out in different coal leveling stages is dynamically adjusted according to the coal feeding hole circle number of the coal feeding vehicle, and the coal feeding efficiency is improved; the highest coal feeding quantity is taken as a coal feeding standard value, the coal feeding volume (coal feeding circle number) of each coal feeding port is distributed, the residual coal quantity discharge is reduced, which is conducive to improving the coal feeding quantity of the entire coke oven carbonization chamber and improving the coal feeding efficiency of the coke oven. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is the existing coal feeding process equipment structure schematic diagram in the background art of the application.

[0023] Figure 2 is the side view structure schematic diagram of Figure 1 .

[0024] Figure 3 is the coal feeding process equipment structure schematic diagram of one preferred embodiment of the application.

[0025] Figure 4 is the far-end coal leveling start state schematic diagram.

[0026] Figure 5 is the far-end coal leveling end state schematic diagram.

[0027] Figure 6 is the near-end coal leveling start state schematic diagram.

[0028] Figure 7 is the near-end coal leveling end state schematic diagram. EMBODIMENT

[0029] Example: This example illustrates an efficient coal feeding method using a coal feeding car. Taking a 4-bucket coal feeding car feeding 40 tons of coal into a 7-meter coke oven carbonization chamber in a single operation as an example, with a coal density of 1000 kg / m³, a coal pile bottom area (also the carbonization chamber bottom area) S = 6.15 square meters, and a coal pile height H = 6.5 meters, the total volume of the coal pile is S*H = 6.15*6.5 = 40 cubic meters. Figure 3 As shown, a coal hopper scale is installed on each coal hopper of the coal feeding car to calculate the coal weight ΔMm fed during the coal feeding process. The coal hopper scale has a weighing range of 0-15 tons and an accuracy of ±1 kg. A rotary encoder is installed at the end of the central shaft of each coal feeding auger to calculate the number of coal feeding revolutions N and the angle G of each auger during the coal feeding process. A residual coal scale is installed at the residual coal hopper of the coke pusher car to calculate the weight of residual coal ΔMy pulled out each time during the coal leveling process of the coke pusher car. The residual coal scale has a weighing range of 0-10 tons and an accuracy of ±1 kg. An encoder is installed at the coal leveling rod of the coke pusher car, which rotates as the coal leveling rod extends to convert the extension length L of the coal leveling rod. The measurement length range is 0-30 meters, and the coal leveling area has a length of 3 meters-23 meters with a stroke accuracy of ±1 cm. With the coal feeding ports in the coke oven carbonization chamber evenly distributed and the four coal feeding augers of the coal feeding car operating at a constant speed, each coal feeding auger completes 10 cubic meters of coal in 50 standard rotations, meaning that the amount of coal fed per rotation is 0.2 cubic meters. Since a rotary encoder is used, the rotation angle per rotation is 360 degrees, so the amount of coal fed per degree is: 0.2 cubic meters / 360 degrees = 0.56 cubic decimeters / degree.

[0030] This embodiment uses the volume of coal added to the carbonization chamber as the measurement method to calculate the coal feed rate, providing a staged and efficient coal feeding method. The coal feeding process is mainly divided into a synchronous peak-reaching stage, a distant coal feeding and leveling stage, and a near-end coal feeding and leveling stage. Details are as follows:

[0031] 1. Achieve synchronous peak material feeding. After coal feeding preparation is complete, the four coal feeding screws will start synchronously and at the same speed, injecting coking coal into the carbonization chamber at a fixed rotation speed of 20 revolutions / minute. To ensure that the amount of coal falling from each coal feeding port is consistent in weight and volume, during the coal feeding process, the control system quantitatively and quantitatively injects coking coal into the carbonization chamber by comparing the changes in the coal feeding weight ΔMm and the number of feeding revolutions ΔN of each coal hopper scale per unit time. Let the coal feeding weights of coal hoppers 1#-4# and the screws be ΔMm1, ΔMm2, ΔMm3 and ΔMm4 respectively within 15 seconds, and the number of feeding revolutions be ΔN1, ΔN2, ΔN3 and ΔN4 respectively.

[0032] To ensure the synchronous rise of the material level at each coal charging port, it is necessary to ensure that ΔMm1 = ΔMm2 = ΔMm3 = ΔMm4 = 1 ton in terms of the coal charging weight, and ΔN1 = ΔN2 = ΔN3 = ΔN4 = 5 turns in terms of the coal charging volume, that is, ΔMm1 / ΔN1 = ΔMm2 / ΔN2 = ΔMm3 / ΔN3 = ΔMm4 / ΔN4 = 0.2 ton. Suppose the newly added material level height is Δh = 1 m, the newly added coal charging amount is ΔM = 6.2 tons, the coal density is ρ = 1 ton / m³, the bottom area of the carbonization chamber is S = 6.15 m², and the total number of coal charging turns is ΔN = 5×4 = 20 turns. Then ΔM = Δh×S×ρ ≈ 1×6.15×1 = K×ΔN = K×20 = 6.2 tons, where K is the proportionality coefficient between the coal charging weight and the number of turns, that is, K = ΔM / ΔN = 6.2 / 20 = 0.31. Since the ideal material level height is H = 6.5 m and the total coal feeding weight is M = 40 tons, then M = H×S×ρ = 6.5×6.15×1 = 40. In this formula, both H and S are fixed values, while the value of the pulverized coal density ρ will change with the change of coal types. To reduce the failure of the synchronous peak reaching process caused by the change of coal density, a standard proportionality coefficient K of the coal charging weight and the number of turns can be set 标准 , during the actual coal charging process, monitor the total coal feeding amount Δ∑M and the total number of coal feeding turns Δ∑N. If Δ∑M / Δ∑N is greater than K 标准 , it means that the density of the coal has increased. If Δ∑M / Δ∑N is less than K 标准 , it means that the density of the coal has decreased. In the case of stable coal type and unchanged coal density, K 标准 should be a constant value, and the ratio of the coal feeding weight ΔMm and the number of coal feeding turns ΔN of each coal bunker scale should satisfy ΔM / ΔN = ΔMm1 / ΔN1 = ΔMm2 / ΔN2 = ΔMm3 / ΔN3 = ΔMm4 / ΔN4. By maintaining this value, the material level of the coking coal in the carbonization chamber will show a distribution state where 4 peaks rise evenly, as shown in Figure 3 the material level shown

[0033] 2. Judge the abnormal state during the coal charging process and process it automatically. In case of problems such as screw jam or coal hopper suspension during the coal charging process, which cause the coal not to be fed into the carbonization chamber normally, the coal charging control system will judge whether an abnormality occurs according to the values and ratios of the coal feeding weight ΔMm and the number of coal feeding turns ΔN of the coal feeding hopper taking the 1# coal hopper as an example, within the unit time T = 15 s, in the normal coal feeding state, ΔMm1 = K×ΔN1 = 0.31×5 = 1.55 tons. If ΔMm1 < K×ΔN1, it can be judged that the 1# coal hopper has suspension, resulting in the coal not being able to enter the screw smoothly, and the control system will automatically start the coal vibrating or air cannon to handle the suspended coal. If ΔMm1 > K×ΔN1, it can be judged that the pulverized coal in the 1# screw is under greater compression and there is a tendency of coal blockage. The coal charging control system will reduce the rotational speed of the coal feeding motor and slow down the compression of the pulverized coal until ΔMm1 / ΔN1 returns to ΔM / ΔN

[0034] 3. Method for achieving remote coal feeding and leveling. During the coal feeding process, the material line in the carbonization chamber rises continuously and uniformly. After the number of feeding cycles at each coal feeding port reaches the set value and the peak material line reaches the ideal material line height H=6.5 meters, the coke pusher prepares for leveling. Coal feeding ports #1 and #2, which are closer to the leveling port, will slow down or stop feeding, while coal feeding ports #3 and #4 will continue feeding. The peak coal feeding value at coal feeding ports #3 and #4 will exceed the ideal material line height by 5%. Figure 4 As shown. At this time, the coke pusher's leveling rod begins to enter the carbonization chamber from the leveling port for remote leveling operation. In this embodiment, the leveling rod's stroke is calculated using a leveling encoder, and the stroke position is divided into positions S1-S4. Position S1 is at the leveling port (absolute address of leveling rod is 3 meters), position S2 is to the left of the No. 2 coal feeding port (absolute address of leveling rod is 9 meters), position S3 is to the right of the No. 3 coal feeding port (absolute address of leveling rod is 17 meters), and position S4 is to the right of the No. 4 coal feeding port near the coke oven door (absolute address of leveling rod is 23 meters). The length of the S2 to S4 segment is equal to the length of the S1 to S3 segment, which is 14 meters. When leveling coal at the far end, the end of the leveling rod will only move back and forth three times in sections S2 and S4 to smooth out the peaks of pulverized coal in the carbonization chamber that are higher than the ideal feed line. Under the action of the leveling rod, the pulverized coal at the feed line peaks will fill the feed line valleys, thereby ensuring that the actual coal feed line is level with the ideal feed line. Figure 5 As shown. Since the peak material levels at feed ports #1 and #2 are not higher than the ideal material level during the far-end leveling process, the amount of residual coal carried out during this stage will be relatively small. The coke pusher's residual coal scale will monitor the residual coal pulled out from the residual coal feed port during this stage. If the amount of residual coal carried out, ΔMy = 0.3 tons, is 0.2 tons higher than the set value, it indicates that the coal feed amount during this material leveling peak stage is too high. To ensure that the residual coal amount remains low during this stage, the total number of feed cycles for this stage will be reduced in the next feed process. The reduction value is ΔNy = ΔMy / J = 0.3 / 0.2 = 1.5 cycles, where J is the residual coal amount adjustment coefficient (in this example, equal to 0.2 tons of coal feed per cycle). That is, the more residual coal carried out during this stage, the fewer the total number of feed cycles for the next material leveling peak stage will be.

[0035] 4. Method for achieving the near-end coal feeding and leveling stage. After the far-end coal feeding and leveling stage is completed, coal feeding at feed ports #3 and #4 will stop, and the coke pusher's leveling boom will retract to position S1. At this time, feed ports #1 and #2, which are close to the leveling ports, will begin rapid coal feeding, with the peak coal feeding exceeding the ideal material line height by 5%. Figure 6The pusher car flat coal rod begins to enter the carbonization chamber from the flat coal port for near-end flat coal operation, and the flat coal rod end will move back and forth between S1 and S3 sections to flatten the high coal peak above the ideal coal line, and the coal in the peak of the coal line will fill the valley of the coal line, thereby ensuring that the actual coal line and the ideal coal line are flush. With the overall rise of the coal line, the amount of coal pulled back each time the flat coal rod retreats to S1 will gradually increase, and when the amount of coal pulled back exceeds the set value of 0.2 tons, the pusher car will notify the coal car to stop adding coal, and the last coal added to the carbonization chamber will be flattened for the last complete trip. The flat coal rod starts from S1 and advances to flatten the coal in the entire carbonization chamber onto the coal line until it reaches S4, and then retreats to the initial position of the flat coal rod, at which point the flat coal process ends, as shown in Figure 7 If the amount of coal pulled back ΔMy = 0.4 tons during the near-end coal adding and flattening stage exceeds the set value of 0.2 tons, it indicates that the amount of coal added during this stage is too high. To ensure that the amount of coal remaining during this stage remains low, the number of coal adding cycles during the next coal adding process will be reduced by ΔNj = ΔMy / J-ΔNy / 2 = 0.4 / 0.2-1.5 / 2 = 1.25 cycles, where J is the remaining coal adjustment coefficient, i.e., the total number of cycles for the 1# and 2# coal ports during the next near-end flattening stage will be reduced by 1.25 cycles.

[0036] The embodiment also provides a closed-loop method for improving coal charging efficiency. After coal charging and coal leveling of the coke oven carbonization chamber are completed, the coal charging vehicle control system calculates total coal charging weight Δ∑Mn, total coal charging number Δ∑Nn and total residual coal amount Myn of the carbonization chamber. By calculating different coal charging amounts of the same coal in the carbonization chamber, the maximum value of the carbonization chamber coal charging weight (Δ∑M-My)max=40.1-0.1=40 tons can be obtained, which is used as the optimal coal charging standard of the coal, and the total coal charging number at this time (Δ∑N)max=50*4=200 turns can also be obtained. The total coal charging number is decomposed to each coal feeding auger, and the coal charging number allocated to each coal feeding auger will be (Δ∑N)max / 4=50 turns in the case that the feeding state of each coal charging port is the same. The coal charging number of each auger when the material line synchronously reaches the peak will be η*(Δ∑N)max / 4=0.9*50=45 turns, wherein η is a synchronization coefficient, and 0.9 is taken in the embodiment. After the material line synchronously reaches the peak, the 3rd and 4th coal charging ports far from the coal leveling port continue to charge coal, and the coal charging number is [1-η]*(Δ∑N)max / 4=5 turns. Then the coke pushing vehicle coal leveling rod starts to perform the far-end coal charging and coal leveling stage operation, and the end of the coal leveling rod will move back and forth between S2 and S4 segments to the set number of times and return to the S1 position. At this time, the residual coal weighing system measures the residual coal amount ΔMy pulled out this time, which is 0.3 tons. If it is higher than the set value, it is judged that the set number of turns η*(Δ∑N)max / 4 of each coal charging port is too high, and the next coal charging number will be set as η*(Δ∑N)max / 4-ΔMy / (J*4)=44.625 turns. Then the 1st and 2nd coal charging ports close to the coal leveling port continue to charge coal, and the coal charging number is [1-η]*(Δ∑N)max / 4=5 turns. Then the coke pushing vehicle coal leveling rod starts to perform the near-end coal charging and coal leveling stage operation, and the end of the coal leveling rod will move back and forth between S1 and S3 segments to the set number of times and return to the S1 position. Finally, the complete coal leveling operation of the S1 to S4 area is performed again, and the residual coal weighing system measures the residual coal amount ΔMy pulled out this time, which is 0.4 tons. If it is higher than the set value, it is judged that the set number of turns (1-η)*(Δ∑N)max / 4 of each coal charging port in the coal leveling stage is too high, and the next coal charging number of the 1st and 2nd coal charging ports will be set as (1-η)*(Δ∑N)max / 4-ΔMy / (J*2)+ΔNy / 4=4.375 turns. By taking the highest coal charging amount as the coal charging standard value, the coal charging volume (coal charging number) of each coal charging port is allocated, the residual coal amount is reduced, the coal leveling efficiency is effectively improved, the coal charging amount of the entire coke oven carbonization chamber is improved, and the coal charging efficiency of the coke oven is improved.

[0037] The present application is not limited to the above-mentioned embodiments. Any technical solution formed by equivalent replacement falls within the protection scope of the present application.

Claims

1. A method for efficient coal feeding in a coal-feeding vehicle, characterized in that, It includes the following steps; After the coal charging preparation is completed, all No. 1 to No. 4 coal hoppers of the coal charging car and the corresponding augers will be started synchronously and at the same speed, and coking coal will be injected into the carbonization chamber at a fixed speed; Within a unit time, the coal feeding weights of each coal hopper of the coal charging car are ΔM1, ΔM2, ΔM3, and ΔM4 respectively, and the coal feeding turns of the augers are ΔN1, ΔN2, ΔN3, and ΔN4 respectively. The coal feeding weight and the coal feeding turns should ensure compliance with: ΔM1 / ΔN1 = ΔM2 / ΔN2 = ΔM3 / ΔN3 = ΔM4 / ΔN4; Let the proportionality coefficient of the coal feeding weight and the coal feeding turns be K, K = Δ∑M / Δ∑N, where Δ∑M is the sum of the coal feeding weights of each coal hopper, and Δ∑N is the sum of the coal feeding turns of each coal hopper; Let H be the ideal feed height in the carbonization chamber under ideal conditions, S be the bottom area of ​​the carbonization chamber, and M be the ideal coal feed weight. Then M = H * S * ρ = k 标准 *N, to get k 标准 =M / N, where K 标准 Let N be the standard proportional coefficient of the coal weight and the number of feeding rings under standard coal density, and let N be the number of feeding rings of the auger under standard coal density. When K is less than K 标准 This indicates that the coal density decreases when K is greater than K. 标准 This indicates that the coal density has increased; Within a unit time T, for the data of any coal hopper, if ΔMn < K*ΔNn, where n = 1, 2, 3, 4; it is determined that the coal in this coal hopper cannot smoothly enter the auger, and then the corresponding coal vibrating device or air cannon is started for treatment; If ΔMn > K*ΔNn, it is determined that there is a tendency of coal blockage in the auger of this coal hopper, and then the coal feeding speed of this coal hopper is reduced until ΔMn = K*ΔNn; After the coal feeding turns of each auger reach the set value and the peak of the material line reaches the ideal material line height H, the No. 1 and No. 2 coal hoppers near the flat coal port slow down or stop coal feeding, and the No. 3 and No. 4 coal hoppers far from the flat coal port continue to feed coal until the coal feeding peak exceeds the ideal material line height by 5%; at this time, the flat coal rod of the coke pusher starts to enter the carbonization chamber from the flat coal port for flat coal operation. The action stroke position of the flat coal rod is divided into positions S1 to S4, where S1 is at the flat coal port position, S2 is on the left of the coal feeding port of the No. 2 coal hopper, S3 is on the right of the coal feeding port of the No. 3 coal hopper, and S4 is on the right of the coal feeding port of the No. 4 coal hopper near the coke side furnace door position, and the length of the S2 to S4 section is equal to the length of the S1 to S3 section; When flat coal is carried out at the far end, the end of the flat coal rod will only move back and forth between the S2 and S4 sections to level the coal peak higher than the ideal material line in the carbonization chamber. Monitor the surplus coal pulled out from the surplus coal port at this stage. If the amount of surplus coal ΔMy pulled out at one time exceeds the set value, it means that the coal feeding amount in the peak synchronization stage of this material line is too high, and the set coal feeding turns will be adjusted downward in the next coal feeding; After the flat coal at the far end is completed, the No. 3 and No. 4 coal hoppers stop coal feeding, the flat coal rod of the coke pusher will retract to the S1 position, the No. 1 and No. 2 coal hoppers start to feed coal, and the coal feeding peak reaches 5% higher than the ideal material line height. The end of the flat coal rod will move back and forth between the S1 and S3 sections to level the coal peak higher than the ideal material line. After the surplus coal ΔMy pulled out by the flat coal rod reaches the threshold value, the coal charging car stops coal feeding, and the flat coal rod performs a complete stroke of flat coal again.

2. The efficient coal feeding method for a coal-feeding vehicle according to claim 1, characterized in that: After adding coal and leveling coal to the coke oven carbonization chamber, calculate the total coal weight Δ∑M, the total number of coal feeding cycles Δ∑N, and the total remaining coal My. By calculating different coal loading amounts for the same coal type in the carbonization chamber, the maximum weight that can be achieved by adding coal to the carbonization chamber can be obtained as (Δ∑M-My)max. This is used as the optimal coal feeding standard for this coal type. At the same time, the total number of coal feeding cycles at this time can also be obtained as (Δ∑N)max. This total number of coal feeding cycles is then allocated to each auger. The number of coal feeding cycles allocated to each auger will be (Δ∑N)max / 4. When the material line reaches its peak synchronously, the number of coal feeding cycles for each auger will be η*(Δ∑N)max / 4, where η is the synchronization coefficient, with a value range of 0.80-0.

95.

3. The efficient coal feeding method for a coal-feeding vehicle according to claim 2, characterized in that: Before the far-end coal leveling, coal hoppers No. 3 and No. 4 continue to feed coal, with the number of feeding cycles being [1-η]*(Δ∑N)max / 4. Then, the coal leveling rod of the coke pusher begins the far-end coal feeding and leveling stage operation. The end of the leveling rod will move back and forth between sections S2 and S4 to the set number of trips and return to position S1. At this time, the residual coal weighing system measures the amount of residual coal pulled out this time, ΔMy. If it is higher than the set value, it is judged that the set number of feeding cycles η*(Δ∑N)max / 4 for all coal hoppers is too high. The next time, the number of feeding cycles for each coal hopper will be set to η*(Δ∑N)max / 4-ΔMy / (J*4)=η*(Δ∑N)max / 4-ΔNy / 4; J is the residual coal amount adjustment coefficient, and ΔNy is the total number of coal feeding cycles reduced in the far-end coal leveling stage. The more residual coal is brought out, the fewer the number of coal feeding cycles for each coal feeding port to reach the peak of the material line in the next time will be.

4. The efficient coal feeding method for a coal-feeding vehicle according to claim 2, characterized in that: Before the near-end leveling, coal hoppers 1 and 2 continue to feed coal, with the number of feeding cycles being [1-η]*(Δ∑N)max / 4. Then, the coke pusher's leveling rod begins the near-end coal feeding and leveling stage operation. The end of the leveling rod will move back and forth between sections S1 and S3 to the set number of passes and return to position S1. Finally, a complete leveling operation is performed in the area from S1 to S4. At this time, the residual coal weighing system measures the amount of residual coal pulled out in this pass, ΔMy. If it is higher than the set value, it is judged that the set number of feeding cycles (1-η)*(Δ∑N)max / 4 at the coal feeding port of the leveling stage is too high. The next time, the number of feeding cycles for coal hoppers 1 and 2 will be set to (1-η)*(Δ∑N)max / 4-ΔMy / (J*2)+ΔNy / 4. J is the residual coal amount adjustment coefficient. The more residual coal is brought out, the fewer the number of feeding cycles will be set at the near-end leveling point in the next operation.

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