A method of building a large coke oven

Abstract

The application discloses a large coke oven masonry method, which comprises the following steps: S1, before masonry, a position control line of the next layer of to-be-masonry refractory bricks is drawn on both sides of the top of the already-masonry oven wall; S2, the to-be-masonry refractory bricks are arranged on the oven wall according to the position control line; and S3, each part of the oven body is masonryed, and each part of the oven body is composed of multiple oven walls, each oven wall is parallel to the transverse center line of the coke oven, and the two ends of the oven wall correspond to the machine side and the coke side of the coke oven respectively. The application provides a coke oven masonry method which can guarantee the uniformity and consistency of the size of the brick joint, and ensure the positioning and masonry of the bricks.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically a method for constructing large coke ovens. Background Technology

[0002] Coke ovens, as crucial equipment in coking, are characterized by high temperatures, continuous production, and a wide variety of products. A modern coke oven consists of five parts: a foundation platform, a regenerator, an inclined shaft, a combustion chamber, and a roof. Large coke ovens are constructed using various refractory materials and different types of refractory bricks. Due to the large volume of refractory bricklaying work, the overall balance of the coke oven's construction, as well as the consistency and uniformity of the joints between bricks in each layer, directly affects the quality of the coke oven's construction and is crucial for stable, high-yield, and long-term operation. During the construction process, the large amount of refractory bricks required for each layer necessitates ensuring a balanced, layer-by-layer construction throughout the entire oven, directly impacting the improvement of the construction process.

[0003] The traditional method of refractory bricklaying involves alternating between odd and even numbers in the multiple furnace walls of a coke oven. Only a portion of the furnace walls is constructed each day, while the remaining portion is used to store refractory bricks. Four to six layers of the same wall are constructed daily, alternating between the walls being built and those storing bricks. Typically, the entire furnace wall is leveled every two days, making it impossible to ensure that each layer of bricks is laid in the designated position. This method results in localized pressure on the furnace walls, damaging the brick joints and mortar strength. Furthermore, the lack of positional control lines for refractory brick placement and laying leads to uneven brick joint sizes, failing to ensure consistency and uniformity.

[0004] In summary, the existing technology still lacks a method for coke oven masonry that ensures the uniformity and consistency of brick joint size, and guarantees the positioning and placement of bricks. Summary of the Invention

[0005] This invention provides a coke oven masonry method that ensures uniformity and consistency in brick joint size, and guarantees the positioning and placement of bricks.

[0006] To achieve this objective, the present invention provides the following technical solution:

[0007] A method for constructing a large coke oven includes the following steps:

[0008] S1. Before laying the bricks, it is necessary to mark the position control lines of the next layer of refractory bricks to be laid on both sides of the top of the already laid furnace wall.

[0009] S2. Arrange the refractory bricks to be laid on the furnace wall one by one according to the position control line;

[0010] S3. Constructing the various parts of the furnace body. Each part of the furnace body consists of multiple furnace walls. Each furnace wall is parallel to the transverse centerline of the coke oven, and the two ends of the furnace wall correspond to the machine side and coke side of the coke oven, respectively.

[0011] Preferably, the method for marking the control line in step S1 is as follows: based on the longitudinal center line of the coke oven, using a line rod and a triangle ruler marked with control marks for each brick, line segments are marked on both sides of the top of the furnace wall as markers. The line segments are the center of the brick joints between the refractory bricks to be laid, and the markers serve as control lines for the placement and laying position of the refractory bricks to be laid.

[0012] Preferably, the method for arranging the refractory bricks to be laid in step S2 includes: not arranging them within a distance of 300-800mm from the side of the furnace wall machine, leaving space for the length of 2 refractory bricks to be laid; and arranging two layers of refractory bricks to be laid overlapping within a distance of 300-800mm from the coke side of the furnace wall.

[0013] Preferably, step S3 includes: building from the machine side to the coke side, removing the adjacent refractory bricks to be built, applying mortar, and moving the two refractory bricks forward by a length before building; during the building operation, after the refractory bricks with mortar applied to the bottom and sides are initially positioned, they are precisely corrected according to the position control line to ensure that the position control line is at the center of the joint between adjacent refractory bricks; the refractory bricks to be built are kept 300-800mm away from the already built refractory bricks to retain corresponding operating space; when the furnace wall is built to a distance of 600-1600mm from the coke side, the overlapping upper layer of refractory bricks to be built is removed and built first, while the lower layer of refractory bricks to be built is built in the original position, and finally the entire furnace wall is built.

[0014] Preferably, the length of the distance control line is 20-30mm.

[0015] Preferably, the length of the two reserved refractory bricks to be laid is 450-500mm.

[0016] Preferably, no discharge is carried out within 500mm of the side end of the furnace wall machine; two layers of refractory bricks to be laid are overlapped within 500mm of the coke side end of the furnace wall.

[0017] Preferably, the refractory bricks to be laid are kept 500mm apart from the refractory bricks already laid, leaving sufficient operating space; when the furnace wall is built to a distance of 1000mm from the coke side, the overlapping upper layer of refractory bricks to be laid is removed and laid first, while the lower layer of refractory bricks to be laid is laid in its original position.

[0018] Preferably, a method for constructing a large coke oven includes the following steps:

[0019] Step 1: Before laying the bricks, the position control lines for the next layer of refractory bricks to be laid need to be marked on both sides of the top of the already laid furnace wall. Based on the longitudinal center line of the coke oven, use a line rod marked with control marks for each brick and a triangle ruler, and use a pencil to mark a line segment about 20-30mm long on both sides of the top of the furnace wall as a mark. This line segment is the center of the brick joint between the refractory bricks to be laid, and serves as the position control line for the placement and laying of the refractory bricks.

[0020] Step 2: After marking the position control lines on both sides of the top layer of the furnace wall, place the refractory bricks to be laid one by one onto the furnace wall according to the position control lines. At the same time, do not lay any bricks within approximately 500mm of the end of the furnace wall on the machine side, leaving space for two refractory bricks to be laid. Then, overlap two layers of refractory bricks within approximately 500mm of the end of the furnace wall on the coke side.

[0021] Step 3: Two bricklayers work together, positioned on either side of the furnace wall. They begin bricklaying from the machine side towards the coke side, removing the adjacent refractory bricks to be laid, applying mortar, and moving the two bricks forward by a certain length before laying the bricks.

[0022] Step 4: During the bricklaying operation, after the refractory bricks with mortar applied to their bottom and sides are initially positioned, they should be precisely aligned according to the position control line to ensure that the position control line is centered on the joint between adjacent refractory bricks. Maintain a distance of approximately 500mm between the refractory bricks to be laid and those already laid to allow sufficient operating space for the bricklaying process.

[0023] Step 5: When the furnace wall is about 1000mm away from the end of the coke side, remove the overlapping upper layer of refractory bricks to be laid and lay them first. Then lay the lower layer of refractory bricks in the original position to complete the construction of the entire furnace wall.

[0024] Compared with the prior art, the beneficial effects and significant progress of the present invention are as follows: The large coke oven masonry method provided by the present invention adopts the method of evenly distributing the refractory bricks to be masonry on the furnace wall, avoiding local pressure on the furnace wall caused by the entry of whole boxes of bricks into the furnace, and protecting the strength of the brick joints and mortar; at the same time, the present invention uses refractory brick position control lines marked on the furnace wall, and then lays them out one by one to ensure the uniformity and consistency of the brick joint size; the present invention effectively improves the masonry quality and work efficiency. Attached Figure Description

[0025] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly introduced below.

[0026] Obviously, the accompanying drawings described below are only some of the drawings of the embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort, but these other drawings are also within the scope of the drawings required for the embodiments of the present invention.

[0027] Figure 1 This is a flowchart of a method for constructing a large coke oven according to an embodiment of the present invention;

[0028] Figure 2 This is a diagram illustrating the positioning and bricklaying construction effect of a large coke oven masonry method according to an embodiment of the present invention.

[0029] Figure 3 This is a diagram illustrating the positioning and bricklaying construction effect of a large coke oven masonry method according to an embodiment of the present invention.

[0030] In the diagram, 1 is the furnace wall, 2 is the refractory brick, 3 is the control line, 4 is the refractory brick that has already been laid, and 5 is the refractory brick that is to be laid. Detailed Implementation

[0031] To make the objectives, technical solutions, beneficial effects, and significant advancements 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 provided in the embodiments of the present invention.

[0032] Obviously, all the embodiments described are only some embodiments of the present invention, and not all embodiments; 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.

[0033] What needs to be understood is:

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation", "connection", "fixation" and the like should be interpreted broadly. For example, it can be a fixed connection, a detachable connection or a movable connection, or it can be an integral part; it can be a direct connection, an indirect connection through an intermediate medium, or an invisible signal connection, or even an optical connection; it can be the internal connection of two elements or the interaction between two elements, unless otherwise explicitly limited.

[0035] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] It should also be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0037] The technical solution of the present invention will now be described in detail with reference to specific embodiments.

[0038] like Figure 1 As shown, a method for supporting a foundation pit is illustrated, comprising the following steps:

[0039] S1. Before laying the bricks, it is necessary to mark the position control lines of the next layer of refractory bricks to be laid on both sides of the top of the already laid furnace wall.

[0040] S2. Arrange the refractory bricks to be laid on the furnace wall one by one according to the position control line;

[0041] S3. Constructing the various parts of the furnace body. Each part of the furnace body consists of multiple furnace walls. Each furnace wall is parallel to the transverse centerline of the coke oven, and the two ends of the furnace wall correspond to the machine side and coke side of the coke oven, respectively.

[0042] In this embodiment, the method for marking the control line in step S1 is as follows: based on the longitudinal center line of the coke oven, using a line rod and a triangle ruler marked with control marks for each brick, line segments are marked on both sides of the top of the furnace wall as markers. The line segments are the center of the brick joints between the refractory bricks to be laid, and the markers serve as the control lines for the placement and laying position of the refractory bricks to be laid.

[0043] In this embodiment, the method for arranging the refractory bricks to be laid in step S2 includes: not arranging them within 500mm of the side end of the furnace wall machine, leaving space for the length of 2 refractory bricks to be laid; and arranging two layers of refractory bricks to be laid overlapping within 500mm of the coke side end of the furnace wall.

[0044] In this embodiment, step S3 includes: building from the machine side to the coke side, taking out the adjacent refractory bricks to be built, applying mortar, and moving the two refractory bricks forward by a length before building; during the building operation, after the refractory bricks with mortar applied to the bottom and sides are initially positioned, they are precisely corrected according to the position control line to ensure that the position control line is at the center of the joint between adjacent refractory bricks; the refractory bricks to be built are kept 500mm away from the already built refractory bricks to reserve corresponding operating space; when the furnace wall is built to a distance of 1000mm from the coke side, the overlapping upper layer of refractory bricks to be built is taken out and built first, while the lower layer of refractory bricks to be built is built in the original position, and finally the entire furnace wall is built.

[0045] In this embodiment, the length of the distance control line is 20-30mm.

[0046] In this embodiment, the two reserved refractory bricks to be laid are 450-500mm long.

[0047] like Figure 2 , 3 The diagram shows the positioning and bricklaying of a large coke oven construction method, including the furnace wall 1, refractory bricks 2, control lines 3, already laid refractory bricks 4, and refractory bricks to be laid 5. The furnace body of the large coke oven is constructed from refractory bricks 2 of different types and shapes.

[0048] Figure 2 The positioning and placement of refractory bricks is as follows: After marking the position control line 3 on the furnace wall 1, the refractory bricks 5 to be laid are placed one by one onto the furnace wall 1 according to the position control line 3. At the same time, no refractory bricks are laid within a distance B on the machine side end of the furnace wall 1, leaving space for two refractory bricks 5 to be laid, generally 450-500mm. Two layers of refractory bricks 5 are overlapped within a distance B on the coke side end of the furnace wall 1.

[0049] Figure 3The positioning and bricklaying process is as follows: During the bricklaying operation, after the refractory bricks 5, with mortar applied to their bottom and sides, are initially positioned, they are precisely aligned according to the position control line 3 to ensure that the position control line 3 is centered on the joint between adjacent refractory bricks. A certain distance B is maintained between the refractory bricks 5 to be laid and the already laid refractory bricks 4, preserving sufficient operating space for the bricklaying operation. When the furnace wall 1 is built to a distance of twice B from the coke side end, the overlapping upper layer of refractory bricks 5 is first laid, and the lower layer of refractory bricks 5 is then placed in its original position, ultimately completing the construction of the entire furnace wall 1.

[0050] The large coke oven masonry method of this embodiment is applied to the construction of a 70-hole, 7.65m coke oven. The oven body is constructed from nearly 30,000 tons of refractory material of more than 700 brick grades. The oven body has a total of 71 combustion chambers and includes a foundation platform, regenerator, inclined duct, combustion chambers, and oven roof. The oven body is 14,040mm high, 18,640mm wide, and 120,000mm long. The width of the oven body is divided into the machine side and the coke side, with the side closer to the coke pusher being the machine side. Taking the masonry of the regenerator section as an example, the following steps are included:

[0051] Step 1: The regenerator section has 29 layers of masonry, with a total height of 3625mm and a thickness of 125mm per layer (120mm for refractory bricks and 5mm for joints). This section consists of 143 main and secondary furnace walls arranged alternately along the transverse centerline of the coke oven. The main furnace wall is 260mm wide, the secondary furnace wall is 200mm wide, and both are 18640mm long. Each layer of the main furnace wall consists of 108 refractory bricks, and each secondary furnace wall consists of 72 bricks.

[0052] Step 2: The area below the regenerator is the foundation platform. Before the first layer of the regenerator is built, the wall width control lines of the first layer of bricks of the main furnace wall and the secondary furnace wall of the regenerator, as well as the position control lines of each refractory brick are marked on the foundation platform.

[0053] Step 3: Arrange the refractory bricks of the first layer of the main furnace wall and the secondary furnace wall of the regenerator in an orderly manner according to the masonry position control line. At the same time, the bricks within 500mm (length B) of the end of the machine side overlap the refractory bricks already arranged within 500mm (length B) of the end of the coke side.

[0054] Step 4: The bricklaying personnel work in pairs; each pair is responsible for the bricklaying of two adjacent and continuous main furnace walls and two secondary furnace walls. The personnel are located on both sides of the same main (or secondary) furnace wall, and the bricklaying is carried out from the end of the machine side to the coke side.

[0055] Step 5: Starting from the side end of the main (or secondary) furnace wall machine, take each adjacent refractory brick to be laid and apply refractory mortar. After applying the refractory mortar, position and align the refractory bricks according to the position control lines marked on the foundation platform, ensuring that the brick joints between adjacent refractory bricks are centered on the control lines.

[0056] Step 6: During the masonry process, the distance between the placed refractory bricks to be laid and the laid refractory bricks is 500mm to meet the requirement of having sufficient operating space.

[0057] Step 7: After the first layer of refractory bricks in the main (or secondary) furnace wall is completed, mark the position control lines of the next layer of refractory bricks on both sides of the top surface of the first layer of refractory bricks, and then proceed with the placement and laying of refractory bricks, and repeat the cycle upwards.

[0058] In summary, the large-scale coke oven masonry method of this invention is suitable for coke ovens with multiple brick grades, complex brick shapes, and large volumes. Based on the geometric dimensions and characteristics of each part of the coke oven body, the specific positions of each refractory brick are determined layer by layer. Position control lines for the next layer of refractory bricks are marked on the top surface of the already laid brick layers. Refractory bricks are then laid in a specific order, from the machine side of the furnace wall towards the coke side, ensuring that the center of the brick joints of adjacent bricks is located on the position control lines. This effectively guarantees the precise positioning of the refractory bricks. Simultaneously, a certain distance is left between the refractory bricks to be laid and the laid refractory bricks to facilitate operation. This method is simple, reliable, fast to construct, and easy to maintain. The method of this invention was successfully applied in the construction of a 7.65m coke oven on site, greatly improving the accuracy and efficiency of coke oven masonry, demonstrating significant effectiveness.

[0059] In the description process of the above instruction manual:

[0060] The terms "this embodiment," "an embodiment of the present invention," "as shown," "further," and "further improved technical solutions," etc., indicate that the specific features, structures, materials, or characteristics described in the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms are not necessarily directed at the same embodiment or example, and the specific features, structures, materials, or characteristics described can be combined or combined in any suitable manner in one or more embodiments or examples. Furthermore, without causing contradiction, those skilled in the art can combine or combine the different embodiments or examples described in this specification and the features of the different embodiments or examples.

[0061] Finally, it should be noted that:

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them;

[0063] 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. Such 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. Non-essential improvements, adjustments or substitutions made by those skilled in the art based on the content of this specification are all within the scope of protection claimed by the present invention.

Claims

1. A method for constructing a large coke oven, characterized in that, Includes the following steps: S1. Before laying the bricks, it is necessary to mark the position control lines of the next layer of refractory bricks to be laid on both sides of the top of the already laid furnace wall. S2. Arrange the refractory bricks to be laid on the furnace wall one by one according to the position control line; S3. Constructing the various parts of the furnace body. Each part of the furnace body is composed of multiple furnace walls. Each furnace wall is parallel to the transverse centerline of the coke oven, and the two ends of the furnace wall correspond to the machine side and coke side of the coke oven, respectively. The method for arranging the refractory bricks to be laid in step S2 includes: not arranging them within 300-800mm of the side end of the furnace wall machine, leaving space for the length of 2 refractory bricks to be laid; and overlapping two layers of refractory bricks to be laid within 300-800mm of the coke side end of the furnace wall. Step S3 includes: constructing the furnace wall from the machine side to the coke side, removing the adjacent refractory bricks to be constructed, applying mortar, and moving the two refractory bricks forward by a length before construction; during the construction operation, after the refractory bricks with mortar applied to the bottom and sides are initially positioned, they are precisely aligned according to the position control line to ensure that the position control line is at the center of the joint between adjacent refractory bricks; the refractory bricks to be constructed are kept 300-800mm away from the already constructed refractory bricks to retain corresponding operating space; when the furnace wall is constructed to a distance of 600-1600mm from the coke side, the overlapping upper layer of refractory bricks to be constructed is removed and constructed first, while the lower layer of refractory bricks to be constructed is constructed in its original position, thus completing the construction of the entire furnace wall.

2. The method for constructing a large coke oven as described in claim 1, characterized in that, The method for marking the control lines in step S1 is as follows: Based on the longitudinal center line of the coke oven, use a line rod and a triangle ruler marked with control marks for each brick to mark line segments on both sides of the top of the furnace wall as markers. The line segments are the center of the brick joints between the refractory bricks to be laid, and the markers serve as the control lines for the placement and laying position of the refractory bricks to be laid.

3. A method for constructing a large coke oven as described in claim 1 or 2, characterized in that, The length of the position control line is 20-30mm.

4. The method for constructing a large coke oven as described in claim 1, characterized in that, The two refractory bricks reserved for laying are 450-500mm long.

5. A method for constructing a large coke oven as described in claim 1, characterized in that, No discharge is carried out within 500mm of the side end of the furnace wall machine; two layers of refractory bricks to be laid are overlapped within 500mm of the coke side end of the furnace wall.

6. A method for constructing a large coke oven as described in claim 1, characterized in that, The refractory bricks to be laid should be kept 500mm apart from the refractory bricks already laid, so as to retain the corresponding operating space. When the furnace wall is built to a distance of 1000mm from the coke side, the overlapping upper layer of refractory bricks to be laid should be removed and laid first, while the lower layer of refractory bricks to be laid should be laid in the original position.

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