A method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven.

Abstract

A method for rapid correction of the coal support plate of a coke oven charging and pushing car in a heat recovery coke oven. The method involves advancing the first 7 meters of the coal support plate into the carbonization chamber for baking. When the surface temperature of the coal support plate reaches 600℃~700℃, the coal support plate is removed from the carbonization chamber and then moved to the tamping station. The inward curl and upward tilt of the coal support plate head are corrected using a static pressure head on the machine side and two steel pipe drums fixed below the static pressure head. The advantages of this invention are: the coal support plate correction method is simple, and a single correction takes less than two hours. This can utilize the two hours of pre-scheduled maintenance time each day for coke oven production, without affecting production. It also significantly shortens maintenance time, reduces labor intensity for workers, reduces maintenance costs, and eliminates the need to adjust the coke oven production sequence. After rapid correction, the coal support plate can be used normally, extending its service life and reducing spare parts procurement costs.

Description

Technical Field

[0001] This invention relates to a method for rapid correction of coal support plates, specifically a method for rapid correction of coal support plates in a coal charging and pushing car for a heat recovery coke oven. Background Technology

[0002] The CHS-2017 clean heat recovery coke oven coal charging and pushing car's coal support plate is used to pull the tamped coal cake from the coal cake mold in the tamping station to the coal charging and pushing car. The coal charging and pushing car is started to the designated carbonization chamber. Through the three-car alignment system, the coal support plate is used to send the coal cake to the carbonization chamber that has just finished coking.

[0003] Because the coal support plate needs to frequently feed the compacted coal cakes into the carbonization chamber each day, with each coal cake feeding cycle taking about one minute, and the temperature inside the carbonization chamber right after coking is around 1000℃, while the outside temperature is 0℃~42℃, this frequent and prolonged operation under rapid heating and cooling conditions causes the front 3m of the coal support plate to warp upwards and curl inwards. This results in the coal cake's head collapsing when it is fed into and removed from the carbonization chamber. Figure 1 As shown. Coal collapse at the furnace opening prevents the lower furnace door from closing in time, affecting production and increasing the labor intensity of furnace door operators. Replacing a coal support plate is very expensive. If the traditional method of heating and correcting the upward-curving and inward-curving parts of the coal support plate is used, each correction takes 16 to 20 hours, which not only affects production but also increases maintenance costs. Furthermore, based on past production experience, the coal support plate needs to be corrected again every 2 to 3 months after correction, thus rendering it obsolete. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and defects of existing technologies by providing a rapid correction method for the coal support plate of a coke oven charging and pushing car. This coal support plate correction method is simple, and a single correction can be completed within two hours. It can utilize the two-hour pre-scheduled maintenance time of coke oven production each day without affecting production, and it greatly shortens maintenance time, reduces the labor intensity of workers, and reduces maintenance costs. It also eliminates the need to adjust the coke oven production output sequence. After rapid correction, the coal support plate can be used normally, extending its service life and reducing spare parts procurement costs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a method for rapid correction of the coal support plate of a coal charging and pushing car in a heat recovery coke oven, comprising the following steps and methods: five 200mm*200mm*δ90mm steel plates and one guide inclined plate are spot-welded side-by-side at the middle position of the head of the coal cake mold bottom plate in the tamping station; two Φ526mm*600mm steel pipe drums are placed below the static pressure head on the machine side, and the two drums are fixed to both sides of the static pressure head with Φ8mm steel bar hooks, with the upper cross section of the drums fitting against the bottom surface of the static pressure head; the coal support plate is then... The coal is pushed forward for 7 meters into the carbonization chamber where it has just finished coking. When the surface temperature of the coal support plate reaches 600℃~700℃, the coal support plate is removed from the carbonization chamber. The coal charging and coking car is then driven to the tamping station, and the baked coal support plate is extended into the coal cake mold at the tamping station about 1.2m. This means that five 200mm*200mm*δ90mm steel plates and one guide inclined plate are pressed by the coal support plate under the middle of the head. By moving the machine-side static pressure head, two Φ526mm*600mm steel pipe drums are positioned above the head of the coal support plate. The machine-side static pressure head is then pressed down to 10MPa. Two Φ526mm*600mm steel pipe drums are pressed on both sides of the head of the coal support plate to correct the inward roll of the coal support plate head. After pressing for about half an hour, the static pressure head is raised. The head of the coal support plate is then retracted to the position of the coke oven machine side walkway. The machine side static pressure head is moved so that the two Φ526mm*600mm steel pipe drums are positioned above the head of the coal support plate. Two Φ133mm*1500mm steel pipe fixtures are installed on the front crossbeam above the coal support plate of the coal charging and coke pushing car. The bottom of the fixtures contacts the coal support plate, and two 100T jacks are installed above the fixtures. Adjust the jacks to hold the front crossbeam in place, so that the steel pipe fixtures press down on the coal support plate. Depending on the degree of upward tilt of the coal support plate head, press down with the machine-side static pressure head. Two Φ526mm*600mm steel pipe drums press down on both sides of the coal support plate head to correct the upward tilt of the coal support plate head. After correction, lift the machine-side static pressure head, release the two Φ133mm*1500mm steel pipe fixtures, and the coal support plate retracts. Check the vertical distance between the lower surface of the coal support plate head and the upper surface of the idler roller below the coal support plate head. A distance within 0mm to 20mm is considered acceptable.

[0006] Furthermore, the guide plate has a specification of 200mm*200mm*δ20mm, and one end of the guide plate is welded to a 200mm*200mm*δ90mm steel plate, while the other end is welded to the coal cake mold base plate.

[0007] Furthermore, the upper and lower cross sections of the two Φ526mm*600mm steel pipe drums must be flat, and 600mm refers to the length of the steel pipe drum.

[0008] Furthermore, one end of the Φ8mm steel bar hook is hooked onto the steel pipe drum, and the other end is welded and fixed to the static pressure head on the machine side.

[0009] Furthermore, the coal support plate head is retracted to the position of the coke oven machine side platform and stops, that is, the coal support plate is retracted 1.3m, and the distance between the coal support plate head and the bottom plate head of the coal cake mold is 100mm.

[0010] Furthermore, when the coal support plate is pushed forward 7 meters into the carbonization chamber where the coke has just been pushed, a self-made refractory cotton temporary baffle is also needed at the furnace opening to ensure that the temperature in the carbonization chamber is greater than 800℃.

[0011] Furthermore, the coal support plate has a length of 19905mm, a width of 3600mm, and a thickness of 60mm. It is made of composite steel plate, which conforms to GB / T8165 and is manufactured by BR grade explosive rolling. The upper surface of the coal support plate is made of 5mm thick stainless steel plate, and the lower surface is made of 55mm thick Q345B steel plate.

[0012] Furthermore, after the downward pressure correction, the static pressure head on the machine side is lifted, the two Φ133mm*1500mm steel pipe fixtures are released, the coal support plate is retracted, and the vertical distance between the lower surface of the coal support plate head and the upper surface of the idler roller below the coal support plate head is checked. If it is within 0mm to 20mm, it is considered qualified. If the vertical distance between the lower surface of the coal support plate head and the upper surface of the idler roller below the coal support plate head is more than 20mm, it needs to be downward pressure corrected again until it is qualified.

[0013] After adopting the above technical solution, the beneficial effects of the present invention are as follows: The rapid correction method for coal support plates has at least the following advantages:

[0014] 1. The method for correcting the coal support plate is simple, and each correction takes less than two hours. This can be achieved by utilizing the two hours of pre-arranged maintenance time for coke oven production each day, without affecting production.

[0015] 2. Compared with the traditional method of correcting the tilted and inward curled coal support plate head by heating it with a hot gun, which requires 16 to 20 hours for a single maintenance, this method greatly shortens the maintenance time, reduces the labor intensity of workers, and reduces maintenance costs.

[0016] 3. Based on past production experience, the head of the coal support plate needs to be readjusted every 2 to 3 months. However, with this rapid coal support plate readjustment method, maintenance can be arranged every day without adjusting the coke oven production sequence.

[0017] 4. After quick alignment, the coal support plate can be used normally, extending its service life and reducing spare parts procurement costs. Attached Figure Description

[0018] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a diagram showing how the head of the coal support plate curls up and rolls inward as it exits the carbonization chamber, causing the head of the coal cake to collapse.

[0020] Figure 2 yes Figure 1 Enlarged view of the coal cake head being collapsed by the coal support plate at point A.

[0021] Figure 3 This is a schematic diagram of the carbonization chamber baking process, where the coke has just been pushed into place and the coal support plate is advanced 7 meters in front.

[0022] Figure 4 yes Figure 3 Enlarged view of section B in the middle.

[0023] Figure 5 This is a schematic diagram showing the correction of the inward rolling of the coal support plate head by the static pressure head on the side of the tamping station machine.

[0024] Figure 6 yes Figure 5 Enlarged view of point C in the middle.

[0025] Figure 7 This is a schematic diagram showing the correction of the upward and downward tilting of the coal support plate head by the static pressure head of the tamping station machine.

[0026] Figure 8 yes Figure 7 Enlarged view of point D in the middle.

[0027] Explanation of reference numerals in the attached drawings: 1. Coal support plate; 2. Temporary refractory cotton baffle; 3. Static pressure head on the machine side; 4. Steel pipe drum; 5. Steel plate and guide inclined plate; 6. Inward roll correction assembly; 7. Coal cake mold; 8. Front crossbeam above the coal support plate; 9. Jack; 10. Steel pipe fixture; 11. Downward pressure correction assembly. Detailed Implementation

[0028] See Figures 2-8 As shown, the technical solution adopted in this specific embodiment includes the following steps and methods:

[0029] S1, five 200mm*200mm*δ90mm steel plates and one guide inclined plate are spot-welded side by side at the middle position of the head of the coal cake mold bottom plate of the tamping station.

[0030] S2, place two Φ526mm*600mm steel pipe drums below the static pressure head on the machine side, and fix the two drums to both sides of the static pressure head with Φ8mm steel bar hooks. The upper cross section of the drum is in contact with the bottom surface of the static pressure head.

[0031] S3, push the coal support plate 7 meters forward into the carbonization chamber that has just finished pushing the coke for baking. When the surface temperature of the coal support plate reaches 600℃~700℃, the coal support plate is removed from the carbonization chamber.

[0032] S4, drive the coal loading and coke pushing car to the tamping station position, and extend the baked coal support plate into the coal cake mold of the tamping station about 1.2m, that is, 5 steel plates of 200mm*200mm*δ90mm and 1 guide inclined plate are pressed by the coal support plate under the middle of the head.

[0033] S5, by moving the static pressure head on the machine side, positions two Φ526mm*600mm steel pipe drums above the head of the coal support plate;

[0034] S6, the static pressure head on the machine side is pressed down to 10MPa, and two Φ526mm*600mm steel pipe drums are pressed on both sides of the coal support plate head to correct the inward roll of the coal support plate head. After pressing for about half an hour, the static pressure head is lifted.

[0035] S7, the coal support plate head is retracted to the position of the coke oven machine side walkway and stops;

[0036] S8, move the static pressure head on the side of the machine so that the two Φ526mm*600mm steel pipe drums are positioned above the head of the coal support plate, and install two Φ133mm*1500mm steel pipe fixtures at the position of the front crossbeam above the coal support plate of the coal charging and coking car. The bottom of the fixtures is in contact with the coal support plate, and two 100T jacks are installed above the fixtures. By adjusting the jacks to hold the front crossbeam, the steel pipe fixtures press down on the coal support plate.

[0037] S9. Based on the degree of upward tilt of the coal support plate head, the static pressure head on the machine side is used to press down, and two Φ526mm*600mm steel pipe drums are pressed on both sides of the coal support plate head to correct the upward tilt of the coal support plate head. The specific correction is shown in Table 1 below:

[0038]

[0039]

[0040] Table 1: Correction and Repair Table for Upward Deformation and Downward Compression of Coal Support Plate Head

[0041] S10, after downward correction, lift the static pressure head on the machine side, release the two Φ133mm*1500mm steel pipe fixtures, retract the coal support plate, and check the vertical distance between the lower surface of the coal support plate head and the upper surface of the idler roller below the coal support plate head. If it is within 0mm to 20mm, it is acceptable; if it is above 20mm, it needs to be downward corrected again according to Table 1 above until it is acceptable.

[0042] More specifically, the guide plate has a size of 200mm*200mm*δ20mm, and one end of the guide plate is welded to a 200mm*200mm*δ90mm steel plate, while the other end is welded to the bottom plate of the coal cake mold.

[0043] More specifically, the upper and lower cross sections of the two Φ526mm*600mm steel pipe drums must be flat, and 600mm refers to the length of the steel pipe drum.

[0044] More specifically, one end of the Φ8mm steel bar hook is hooked onto the steel pipe drum, and the other end is welded and fixed to the static pressure head on the machine side.

[0045] More specifically, the coal support plate head is retracted to the position of the coke oven machine side platform and stops, which means the coal support plate is retracted 1.3m, and the distance between the coal support plate head and the bottom plate head of the coal cake mold is 100mm.

[0046] More specifically, when the coal support plate is pushed into the carbonization chamber 7 meters in front of the coke oven for baking, the furnace opening position also needs to be blocked by a self-made refractory cotton temporary baffle to ensure that the temperature in the carbonization chamber is greater than 800℃.

[0047] More specifically, the coal support plate has a length of 19905mm, a width of 3600mm, and a thickness of 60mm. It is made of composite steel plate, which conforms to GB / T8165 and is manufactured by BR grade explosive rolling. The upper surface of the coal support plate is made of 5mm thick stainless steel plate, and the lower surface is made of 55mm thick Q345B steel plate.

[0048] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A method for rapid correction of the coal support plate of a coal charging and pushing car in a heat recovery coke oven, characterized in that: It includes the following steps and methods: S1, five 200mm*200mm*δ90mm steel plates and one guide inclined plate are spot-welded side by side at the middle position of the head of the coal cake mold bottom plate of the tamping station. S2, place two Φ526mm*600mm steel pipe drums below the static pressure head on the machine side, and fix the two drums to both sides of the static pressure head with Φ8mm steel bar hooks. The upper cross section of the drum is in contact with the bottom surface of the static pressure head. S3, push the coal support plate 7 meters forward into the carbonization chamber that has just finished pushing the coke for baking. When the surface temperature of the coal support plate reaches 600℃~700℃, the coal support plate is removed from the carbonization chamber. S4, drive the coal loading and coke pushing car to the tamping station position, and extend the baked coal support plate into the coal cake mold of the tamping station about 1.2m, that is, 5 steel plates of 200mm*200mm*δ90mm and 1 guide inclined plate are pressed by the coal support plate under the middle of the head. S5, by moving the static pressure head on the machine side, positions two Φ526mm*600mm steel pipe drums above the head of the coal support plate; S6, the static pressure head on the machine side is pressed down to 10MPa, and two Φ526mm*600mm steel pipe drums are pressed on both sides of the coal support plate head to correct the inward roll of the coal support plate head. After pressing for about half an hour, the static pressure head is lifted. S7, the coal support plate head is retracted to the position of the coke oven machine side walkway and stops; S8, move the static pressure head on the side of the machine so that the two Φ526mm*600mm steel pipe drums are positioned above the head of the coal support plate, and install two Φ133mm*1500mm steel pipe fixtures at the position of the front crossbeam above the coal support plate of the coal charging and coking car. The bottom of the fixtures is in contact with the coal support plate, and two 100T jacks are installed above the fixtures. By adjusting the jacks to hold the front crossbeam, the steel pipe fixtures press down on the coal support plate. S9, depending on the degree of upward tilt of the coal support plate head, the static pressure head on the machine side is pressed down, and two Φ526mm*600mm steel pipe drums are pressed on both sides of the coal support plate head to correct the upward tilt of the coal support plate head. S10, after the downward correction, lift the static pressure head on the machine side, release the two Φ133mm*1500mm steel pipe fixtures, retract the coal support plate, and check the vertical distance between the lower surface of the coal support plate head and the upper surface of the idler roller below the coal support plate head. It is acceptable if it is within 0mm to 20mm.

2. The method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven according to claim 1, characterized in that: The guide plate has a specification of 200mm*200mm*δ20mm, and one end of the guide plate is welded to a 200mm*200mm*δ90mm steel plate, while the other end is welded to the bottom plate of the coal cake mold.

3. The method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven according to claim 1, characterized in that: The upper and lower cross sections of the two Φ526mm*600mm steel pipe drums must be flat, and 600mm refers to the length of the steel pipe drum.

4. The method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven according to claim 1, characterized in that: One end of the Φ8mm steel bar hook is hooked onto the steel pipe drum, and the other end is welded and fixed to the static pressure head on the machine side.

5. The method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven according to claim 1, characterized in that: The coal support plate is retracted to the position of the walkway on the side of the coke oven machine and stops, which means the coal support plate is retracted 1.3m, and the head of the coal support plate is 100mm away from the head of the bottom plate of the coal cake mold.

6. The method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven according to claim 1, characterized in that: When the coal support plate is pushed 7 meters in front of the carbonization chamber where the coke has just been pushed, the furnace opening position also needs to be blocked by a self-made refractory cotton temporary baffle to ensure that the temperature in the carbonization chamber is greater than 800℃.

7. The method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven according to claim 1, characterized in that: The coal support plate has a length of 19905mm, a width of 3600mm, and a thickness of 60mm. It is made of composite steel plate, which conforms to GB / T8165 and is manufactured by BR grade explosive rolling. The upper surface of the coal support plate is made of 5mm thick stainless steel plate, and the lower surface is made of 55mm thick Q345B steel plate.

8. The method for rapid correction of the coal support plate of the coal charging and pushing car in a heat recovery coke oven according to claim 1, characterized in that: If the vertical distance between the lower surface of the coal support plate head and the upper surface of the idler roller below the coal support plate head in S10 is more than 20mm, it needs to be pressed down again for correction until it is qualified.

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