A method for pre-erection of a 7.65 m coke oven battery

Abstract

The present application is a method for pre-construction of 7.65m coke oven body; including site arrangement; determining the pre-construction range of coke oven body; pre-construction of coke oven body; processing of pre-construction record result. The pre-construction of coke oven body: the pre-construction should be carried out after all the brick numbers of the construction site are in place, when pre-construction of each layer, the refractory bricks of various brick numbers should be selected according to different batches and different brick stacks, and one batch of refractory bricks should not be selected, so that the pre-construction result has wide representativeness; the line size and elevation of each layer of masonry should be consistent with the design of the drawing during pre-construction; after the construction of each layer of masonry is completed, detailed size measurement and inspection of brick joints, expansion joints, wall width, hole width, wall length, etc. are carried out; after the pre-construction of each part is completed, the data of pre-construction of each part is statistically analyzed, and the problems of design and manufacture of refractory bricks found in pre-construction are solved in time; the operation essentials are determined and implemented in the actual construction process. The present application can find and solve the problems in the construction process of 7.65m coke oven body in advance, and avoid delay of the formal construction period of coke oven body.

Description

Technical Field

[0001] This invention relates to the field of construction technology for blast furnaces, specifically a method for pre-constructing a 7.65m coke oven body. Background Technology

[0002] In recent years, the coking industry has developed rapidly, and coke ovens, as the main equipment in coking, are also developing towards larger scale, environmental protection, and automation. Large coke ovens, such as the 7.65m coke oven, are becoming a development trend. The coke oven body mainly consists of horizontal flues, regenerators, inclined flues, combustion chambers, and the oven roof. The 7.65m large coke oven has a complex structure with many openings, requiring small geometric dimensional errors, generally ±3mm, and demanding high precision in masonry construction. The refractory bricks in the oven body have complex shapes and many special bricks; the mortar joints between refractory bricks are generally 5mm, with an allowable error of ±1mm, requiring high precision in mortar joint construction. Therefore, problems can easily arise during its construction, leading to delays in the project schedule. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned problems and propose a method for pre-construction of the furnace body to solve the above problems in advance and avoid delaying the formal construction period of the coke oven body.

[0004] To achieve the above objectives, the present invention is implemented as follows: A method for pre-lining a 7.65m coke oven body, including... Step 1: Arrange the pre-construction site for the coke oven body: Step 1.1: The area of ​​the pre-construction site should be greater than 200m². 2 The length of the pre-construction site should not be less than 25,000 mm, the width should not be less than 4,000 mm, and the flatness of the ground should be less than 5 mm. Step 1.2: Install two sets of columns with bases on the ground using [20 channel steel. The column height is 2500mm, and each side is fixed with two [10 channel steel rods. The distance in the length direction of the poles is the coke oven length b, and not less than 20000mm. The distance in the width direction of the poles is the center distance a of the coke oven combustion chamber, and is determined according to the 7.65m coke oven type. Step 2: Determine the pre-construction range of the coke oven body: Step 2.1, Horizontal flue section: half the length of the furnace body, two main walls, one single wall, the height of which is the 1A-11A layer of the horizontal flue, including the horizontal flue lining bricks and grate bricks; Step 2.2, Regenerator section: Half the length of the furnace body, two main walls, one single wall, the height of the regenerator is 12-15 layers, the partition wall is 3 layers, and the grid bricks are arranged in 3 layers. Step 2.3, Inclined section: Half the length of the furnace body, two main walls, one single wall, with a height equal to the full height of the inclined section, totaling 9 layers; Step 2.4, Combustion Chamber Location: The entire furnace length contains one combustion chamber; the height includes the upper and lower circulation holes and the masonry over the combustion chamber, including layers 10-14, 33-36, and 49-54. Step 2.5, Top of the furnace: Half the length of the furnace body's inspection hole wall, and all layers including one riser pipe hole and one coal feeding hole; Step 3: Pre-construction of the coke oven body: Step 3.1: Determine the pre-laying method: Pre-laying should be carried out after all the bricks of the laying location have arrived. When pre-laying each layer, refractory bricks of various grades should be selected according to different batches and different brick stacks. It is not allowed to select only one batch of refractory bricks, so that the pre-laying result has broad representativeness. Step 3.2: During pre-construction, ensure that the linear dimensions and elevation of each layer of masonry are consistent with the design drawings; after each layer of masonry is completed, conduct detailed measurements and checks of dimensions such as brick joints, expansion joints, wall width, opening width, and wall length, and keep records. Step 3.3: Mark the longitudinal center line and front line of the coke oven on the ground plane between the two sets of columns made of [20 channel steel; Step 3.4: Mark the wall center line and brick layer line on the front of the column [20 channel steel; place the two wall center lines and masonry edge lines on the horizontal plate, and temporarily fix the horizontal plate on the column. Align each wall center line on the horizontal plate with the wall center line of the column, and align the upper surface of the horizontal plate with the brick layer line of the column that needs to be built. Step 3.5: Construction of the horizontal flue and regenerator, including the sequential construction of the main wall and single walls, central partition wall, lining bricks, grate bricks, partition wall, and placement of the grate bricks. After the construction is completed, carefully check and measure the brick joints of each brick in the regenerator, the size of the furnace expansion joint, the wall width, the hole width, and the wall length; check the protection measures for the grate bricks, the correctness of the placement and protection measures of the partition wall, and make careful records. Step 3.6: Before constructing the ramps, a layer of bricks for the top layer of the regenerator should be laid first, including two main walls and one single wall. Use a horizontal ruler to draw the position lines of each ramp opening from the center line of the coke oven towards the furnace head, and accurately mark them on the regenerator wall. Then, construct the ramps according to the position lines. When constructing each layer of ramp openings, check whether the distance between each opening is accurate, whether there is any misalignment, and whether it exceeds the allowable error. Carefully check and measure the brick joint and expansion joint dimensions of each brick. All dimensions of the wall should be verified against the design dimensions. When constructing the ramps, also check the feasibility of cleaning and protection measures for each expansion joint. Record all test results. Step 3.7: During the construction of the combustion chamber, the flatness and verticality of the wall surface and the joints between each brick should be checked and measured frequently, and records should be made carefully. After the vertical flue is constructed, the feasibility and convenience of the cleaning and protection measures should be checked and verified. Step 3.8: When constructing the furnace top inspection hole wall, coal charging hole and riser pipe hole, the center line and edge line can be drawn directly on the site. The line dimensions and elevation are measured and controlled using a steel tape measure, and records are kept. Step 3.9 After the furnace body is pre-built, remove the mortar from the surface of all pre-built refractory bricks, and then number and package them individually for use as spare parts or in the resisting wall area. Step 4: Processing of pre-construction record results: After the pre-construction of a section is completed, the data of the pre-construction of each section are statistically analyzed, and relevant personnel involved in coke oven masonry are convened to discuss and resolve any problems that arise. By analyzing the dimensions of brick joints and expansion joints, the correctness of the refractory brick design and whether the refractory brick dimensions can meet the design requirements of the masonry are verified. Targeted and reasonable matching schemes for large, medium, and small-sized bricks, as well as refractory brick processing schemes, are developed. Design and manufacturing problems of refractory bricks discovered during pre-construction are resolved in a timely manner. The cleaning and protection measures for each section and the operational difficulties of complex sections are summarized and analyzed to determine the key points of operation and implement them in the actual construction process.

[0005] Using the method described above, the pre-construction site for the 7.65m coke oven body is simple and practical, the pre-construction area is small, the amount of refractory bricks used is small, and the pre-construction of each part of the oven body is representative. This allows for a comprehensive check of the correctness of the design and fabrication of the refractory bricks in each part of the coke oven, the magnitude of refractory brick dimensional errors, and a comprehensive check and verification of the feasibility and convenience of cleaning and protection measures for each part. It also determines the operational procedures for complex parts. In summary, this method exposes various problems in the construction process of the 7.65m coke oven body in advance, saves construction time, and improves the construction quality of the coke oven body. Attached Figure Description

[0006] Figure 1 This is a layout diagram of the pre-masonry site measures used in the pre-masonry method shown in this invention. Detailed Implementation

[0007] The present invention will be further illustrated below through specific embodiments.

[0008] like Figure 1 As shown, a method for pre-constructing a 7.65m coke oven body includes... Step 1: Arrange the pre-construction site for the coke oven body: Step 1.1: The area of ​​the pre-construction site should be greater than 200m². 2 The length of the pre-construction site should not be less than 25,000 mm, the width should not be less than 4,000 mm, and the flatness of the ground should be less than 5 mm. Step 1.2: Install two sets of columns with bases on the ground using [20 channel steel. The column height is 2500mm, and each side is fixed with two [10 channel steel rods. The distance in the length direction of the poles is the coke oven length b, and not less than 20000mm. The distance in the width direction of the poles is the center distance a of the coke oven combustion chamber, and is determined according to the 7.65m coke oven type. Step 2: Determine the pre-construction range of the coke oven body: Step 2.1, Horizontal flue section: half the length of the furnace body, two main walls, one single wall, the height of which is the 1A-11A layer of the horizontal flue, including the horizontal flue lining bricks and grate bricks; Step 2.2, Regenerator section: Half the length of the furnace body, two main walls, one single wall, the height of the regenerator is 12-15 layers, the partition wall is 3 layers, and the grid bricks are arranged in 3 layers. Step 2.3, Inclined section: Half the length of the furnace body, two main walls, one single wall, with a height equal to the full height of the inclined section, totaling 9 layers; Step 2.4, Combustion Chamber Location: The entire furnace length contains one combustion chamber; the height includes the upper and lower circulation holes and the masonry over the combustion chamber, including layers 10-14, 33-36, and 49-54. Step 2.5, Top of the furnace: Half the length of the furnace body's inspection hole wall, and all layers including one riser pipe hole and one coal feeding hole; Step 3: Pre-construction of the coke oven body: Step 3.1: Determine the pre-laying method: Pre-laying should be carried out after all the bricks of the laying location have arrived. When pre-laying each layer, refractory bricks of various grades should be selected according to different batches and different brick stacks. It is not allowed to select only one batch of refractory bricks, so that the pre-laying result has broad representativeness. Step 3.2: During pre-construction, ensure that the linear dimensions and elevation of each layer of masonry are consistent with the design drawings; after each layer of masonry is completed, conduct detailed measurements and checks of dimensions such as brick joints, expansion joints, wall width, opening width, and wall length, and keep records. Step 3.3: Mark the longitudinal center line and front line of the coke oven on the ground plane between the two sets of columns made of [20 channel steel; Step 3.4: Mark the wall center line and brick layer line on the front of the column [20 channel steel; place the two wall center lines and masonry edge lines on the horizontal plate, and temporarily fix the horizontal plate on the column. Align each wall center line on the horizontal plate with the wall center line of the column, and align the upper surface of the horizontal plate with the brick layer line of the column that needs to be built. Step 3.5: Construction of the horizontal flue and regenerator, including the sequential construction of the main wall and single walls, central partition wall, lining bricks, grate bricks, partition wall, and placement of the grate bricks. After the construction is completed, carefully check and measure the brick joints of each brick in the regenerator, the size of the furnace expansion joint, the wall width, the hole width, and the wall length; check the protection measures for the grate bricks, the correctness of the placement and protection measures of the partition wall, and make careful records. Step 3.6: Before constructing the ramps, a layer of bricks for the top layer of the regenerator should be laid first, including two main walls and one single wall. Use a horizontal ruler to draw the position lines of each ramp opening from the center line of the coke oven towards the furnace head, and accurately mark them on the regenerator wall. Then, construct the ramps according to the position lines. When constructing each layer of ramp openings, check whether the distance between each opening is accurate, whether there is any misalignment, and whether it exceeds the allowable error. Carefully check and measure the brick joint and expansion joint dimensions of each brick. All dimensions of the wall should be verified against the design dimensions. When constructing the ramps, also check the feasibility of cleaning and protection measures for each expansion joint. Record all test results. Step 3.7: During the construction of the combustion chamber, the flatness and verticality of the wall surface and the joints between each brick should be checked and measured frequently, and records should be made carefully. After the vertical flue is constructed, the feasibility and convenience of the cleaning and protection measures should be checked and verified. Step 3.8: When constructing the furnace top inspection hole wall, coal charging hole and riser pipe hole, the center line and edge line can be drawn directly on the site. The line dimensions and elevation are measured and controlled using a steel tape measure, and records are kept. Step 3.9 After the furnace body is pre-built, remove the mortar from the surface of all pre-built refractory bricks, and then number and package them individually for use as spare parts or in the resisting wall area. Step 4: Processing of pre-construction record results: After the pre-construction of a section is completed, the data of the pre-construction of each section are statistically analyzed, and relevant personnel involved in coke oven masonry are convened to discuss and resolve any problems that arise. By analyzing the dimensions of brick joints and expansion joints, the correctness of the refractory brick design and whether the refractory brick dimensions can meet the design requirements of the masonry are verified. Targeted and reasonable matching schemes for large, medium, and small-sized bricks, as well as refractory brick processing schemes, are developed. Design and manufacturing problems of refractory bricks discovered during pre-construction are resolved in a timely manner. The cleaning and protection measures for each section and the operational difficulties of complex sections are summarized and analyzed to determine the key points of operation and implement them in the actual construction process.

[0009] Using the method described above, the pre-construction site for the 7.65m coke oven body is simple and practical, the pre-construction area is small, the amount of refractory bricks used is small, and the pre-construction of each part of the oven body is representative. This allows for a comprehensive check of the correctness of the design and fabrication of the refractory bricks in each part of the coke oven, the magnitude of refractory brick dimensional errors, and a comprehensive check and verification of the feasibility and convenience of cleaning and protection measures for each part. It also determines the operational procedures for complex parts. In summary, this method exposes various problems in the construction process of the 7.65m coke oven body in advance, saves construction time, and improves the construction quality of the coke oven body.

Claims

1. A method for pre-constructing a 7.65m coke oven body, characterized by: include Step 1: Arrange the pre-construction site for the coke oven body: Step 1.1: The area of ​​the pre-construction site should be greater than 200m2, of which the length of the pre-construction site should not be less than 25000mm, the width should not be less than 4000mm, and the flatness of the ground should be less than 5mm; Step 1.2: Install two sets of columns with bases on the ground using [20 channel steel. The column height is 2500mm, and each side is fixed with two [10 channel steel rods. The distance in the length direction of the poles is the coke oven length b, and not less than 20000mm. Step 2: Determine the pre-construction range of the coke oven body: Step 2.1, Horizontal flue section: half the length of the entire furnace body, two main walls, one single wall, height of the horizontal flue layers 1A-11A, including the horizontal flue lining bricks and grate bricks; Step 2.2, Regenerator section: Half the length of the furnace body, two main walls, one single wall, the height of the regenerator is 12-15 layers, the partition wall is 3 layers, and the grid bricks are arranged in 3 layers; Step 2.3, Inclined section: Half the length of the furnace body, consisting of two main walls and one single wall, with a height equal to the full height of the inclined section, totaling 9 layers; Step 2.4, Combustion Chamber Location: The entire furnace length contains one combustion chamber; the height includes the upper and lower circulation holes and the masonry over the combustion chamber, including layers 10-14, 33-36, and 49-54. Step 2.5, Top of the furnace: Half the length of the furnace body's inspection hole wall, and all layers including one riser pipe hole and one coal charging hole; Step 3: Pre-construction of the coke oven body: Step 3.1: Determine the pre-laying method: Pre-laying should be carried out after all the bricks for the laying location have arrived. When pre-laying each layer, refractory bricks of various grades should be selected according to different batches and different brick stacks. It is not allowed to use only one batch of refractory bricks to ensure that the pre-laying result has broad representativeness. Step 3.2: During pre-construction, ensure that the linear dimensions and elevation of each layer of masonry are consistent with the design drawings; after each layer of masonry is completed, conduct detailed measurements and checks of brick joints, expansion joints, wall width, opening width, and wall length, and record the results; Step 3.3: Mark the wall center line and brick layer line on the front of the column [20 channel steel; place the two wall center lines and masonry edge lines on the horizontal marker plate, and temporarily fix the horizontal marker plate to the column. Each wall center line on the horizontal marker plate should be aligned with the wall center line of the column, and the upper surface of the horizontal marker plate should be aligned with the brick layer line to be built on the column. Step 3.4: Construction of the horizontal flue and regenerator, including the sequential construction of the main wall and single walls, central partition wall, lining bricks, grate bricks, partition walls, and placement of grate bricks. After completion, carefully check and measure the brick joints of each brick in the regenerator, the dimensions of the furnace expansion joints, wall width, opening width, and wall length; check the protection measures for the grate bricks, the correctness of the placement and protection measures for the partition walls, and make careful records. Step 3.5: Before constructing the ramps, a layer of bricks for the top layer of the regenerator should be laid first, including two main walls and one single wall. Use a horizontal ruler to draw the position lines of each ramp opening from the coke oven centerline towards the furnace head, accurately marking them on the regenerator wall. Then, construct the ramps according to these position lines. When constructing each layer of ramp openings, check the accuracy of the distance between each opening, for any misalignment, and for any deviation from the allowable error. Carefully check and measure the dimensions of the brick joints and expansion joints of each brick. All dimensions of the wall should be verified against the design dimensions. During ramp construction, also check the feasibility of cleaning and protection measures for each expansion joint. Record all inspection results. Step 3.6: During the construction of the combustion chamber, the flatness and verticality of the wall surface, as well as the brick joints of each brick, should be frequently checked and measured, and careful records should be kept. After the vertical fire channel is constructed, the feasibility and convenience of the cleaning and protection measures should be checked and verified. Step 3.7: When constructing the furnace top inspection hole wall, coal charging hole, and riser pipe hole, draw their center lines and edge lines directly on the site. The line dimensions and elevations are measured and controlled using a steel tape measure, and records are kept. Step 3.8: After the furnace body pre-laying is completed, remove the mortar from the surface of all pre-laid refractory bricks, then number and package them individually for use as spare parts or in the resisting wall area; Step 4: Processing of pre-construction record results: After the pre-construction of a section is completed, the data of the pre-construction of each section are statistically analyzed, and relevant personnel involved in coke oven masonry are convened to discuss and resolve any problems that arise. By analyzing the dimensions of brick joints and expansion joints, the correctness of the refractory brick design and whether the refractory brick dimensions can meet the design requirements of the masonry are verified. Targeted and reasonable matching schemes for large, medium, and small-sized bricks, as well as refractory brick processing schemes, are developed. Design and manufacturing problems of refractory bricks discovered during pre-construction are resolved in a timely manner. The cleaning and protection measures for each section and the operational difficulties of complex sections are summarized and analyzed to determine the key points of operation and implement them in the actual construction process.

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