A method for constructing refractory at a special-shaped brick supporting plate of a hydrogen-based shaft furnace high-temperature reduction gas pipeline

Abstract

This application discloses a method for constructing refractory materials at the irregularly shaped support brick plate of a high-temperature reducing gas pipeline in a hydrogen-based vertical shaft furnace, comprising the following steps: constructing the first layer of castable refractory on the inner wall of the high-temperature reducing gas pipeline, excluding the irregularly shaped support brick plate area; laying refractory bricks inside the high-temperature reducing gas pipeline; machining the outer side of brick No. 7 at the irregularly shaped support brick plate area; laying expansion cotton on the outer side of brick No. 7; laying brick No. 6 on top of the irregularly shaped support brick plate; laying expansion cotton on top of brick No. 7; laying brick No. 5 on top of bricks No. 7 and No. 6; laying brick No. 4 on top of brick No. 5; pouring the first layer of castable refractory between the outer sides of bricks No. 6, No. 5, and No. 4 and the inner wall of the high-temperature reducing gas pipeline; and laying refractory bricks on top of brick No. 4. This application provides a method for constructing refractory materials at the irregularly shaped support brick plate of a high-temperature reducing gas pipeline in a hydrogen-based vertical shaft furnace, enabling smooth and reliable construction and ensuring construction quality.

Description

Technical Field

[0001] This application relates to the field of hydrogen-based vertical furnaces, and in particular to a method for constructing refractory materials at the irregularly shaped support brick plate of a high-temperature reducing gas pipeline in a hydrogen-based vertical furnace. Background Technology

[0002] Due to the narrow construction space, complex refractory material design, and high design quality requirements, there is still no complete solution for refractory material construction at the irregular brick support plate of the high temperature and high pressure reducing gas transmission pipeline. Summary of the Invention

[0003] This application provides a method for constructing refractory materials at the irregularly shaped support brick plate of a high-temperature reducing gas pipeline in a hydrogen-based vertical furnace, which enables the construction to proceed smoothly and reliably and ensures construction quality.

[0004] This application provides a method for constructing refractory materials at the irregularly shaped support brick plate of a high-temperature reducing gas pipeline in a hydrogen-based vertical shaft furnace. The method includes the following steps: constructing the first layer of castable refractory on the inner wall of the high-temperature reducing gas pipeline, excluding the irregularly shaped support brick plate area; laying refractory bricks inside the high-temperature reducing gas pipeline until reaching the irregularly shaped support brick plate; cutting the outer side of brick No. 7 at the irregularly shaped support brick plate according to the inclination angle of the inner side of the support brick plate; laying expansion cotton on the outer side of brick No. 7; laying brick No. 6 on top of the irregularly shaped support brick plate, with the inner side of brick No. 6 bonded to the outer side of brick No. 7 via expansion cotton; laying expansion cotton on top of brick No. 7; laying brick No. 5 on top of bricks No. 7 and No. 6, with the bottom of brick No. 5 bonded to the top of brick No. 7 via expansion cotton; and laying brick No. 4 on top of brick No. 5. Pour the first layer of refractory mortar between the outer sides of bricks No. 6, No. 5, and No. 4 and the inner wall of the high-temperature reducing gas pipeline, completing the construction of the first layer of refractory mortar on the inner wall of the high-temperature reducing gas pipeline at the irregular brick support plate. Then, lay refractory bricks on top of brick No. 4 until the predetermined end position is reached.

[0005] In some embodiments, before constructing the first layer of castable material on the inner wall of the high-temperature reducing gas pipeline, fiber paper is pasted on the irregular brick support plate, asphalt is applied to the anchors inside the high-temperature reducing gas pipeline, and the interface protection of the anchors is provided by secondary screwing.

[0006] In some embodiments, during the construction of the first layer of castable refractory, formwork is erected for the first layer of castable refractory. In this case, a 494mm gap is left above the lowest point on the inner side of the irregular brick support plate without formwork. After the formwork is erected, the first layer of castable refractory is poured between the inner wall of the high-temperature reducing gas pipeline and the formwork. After the pouring is completed, curing is carried out and the mold and scaffolding are removed.

[0007] In some embodiments, after the first layer of castable refractory is completed, sealing plates are installed at the upper and lower ends of the high-temperature reducing gas pipeline for pre-baking. The temperature of the high-temperature reducing gas pipeline is heated from room temperature to 200°C and baked for 60 hours. After baking, the sealing plates are removed, and the temperature inside the high-temperature reducing gas pipeline naturally cools down to room temperature.

[0008] In some embodiments, after the first layer of castable is completed, the first layer of castable is checked for cracks larger than 3mm. If there are cracks, the first layer of castable at the crack is removed and recast.

[0009] In some embodiments, during the refractory bricklaying process inside the high-temperature reducing gas pipeline, a second layer of castable refractory is poured between the refractory bricks and the first layer of castable refractory ...

[0010] In some embodiments, during the cutting process of the outer part of the No. 7 brick at the irregular brick support plate according to the inclination angle of the inner side of the irregular brick support plate, the processing length of the No. 7 brick is calculated according to the elevation of the irregular brick support plate. If the processing length is greater than 1 / 2 of the original brick length, the outer part of the No. 7 brick and the outer part of the next layer of refractory bricks are cut. If the processing length is not greater than 1 / 2 of the original brick length, only the outer part of the No. 7 brick is cut.

[0011] In some embodiments, during the construction of refractory bricks on top of brick No. 4, a second layer of castable refractory is poured between the refractory bricks and the first layer of castable refractory ...

[0012] In some embodiments, after the refractory bricks have been laid to a preset end position, the high-temperature reducing gas pipeline is cleaned.

[0013] In some embodiments, after cleaning the high-temperature reducing gas pipeline, sealing plates are installed at the upper and lower ends of the high-temperature reducing gas pipeline for pre-baking. The temperature of the high-temperature reducing gas pipeline is heated from room temperature to 350°C and baked for 147 hours. After baking, the sealing plates are removed.

[0014] A method for constructing refractory at the irregular brick support plate of a high-temperature reducing gas pipeline in a hydrogen-based vertical shaft furnace, according to an embodiment of this application, includes the following steps: constructing the first layer of castable refractory on the inner wall of the high-temperature reducing gas pipeline, excluding the irregular brick support plate area. Laying refractory bricks inside the high-temperature reducing gas pipeline until reaching the irregular brick support plate. Cutting the outer side of brick No. 7 at the irregular brick support plate according to the inclination angle of the inner side of the irregular brick support plate. Laying expansion cotton on the outer side of brick No. 7. Laying brick No. 6 on top of the irregular brick support plate, with the inner side of brick No. 6 bonded to the outer side of brick No. 7 via expansion cotton. Laying expansion cotton on top of brick No. 7. Laying brick No. 5 on top of bricks No. 7 and No. 6, with the bottom of brick No. 5 bonded to the top of brick No. 7 via expansion cotton. Laying brick No. 4 on top of brick No. 5. The first layer of refractory lining is poured between the outer sides of bricks No. 6, No. 5, and No. 4 and the inner wall of the high-temperature reducing gas pipeline, completing the construction of the first layer of refractory lining on the inner wall of the high-temperature reducing gas pipeline at the irregular brick support plate. Refractory bricks are then laid on top of brick No. 4 until the predetermined end position is reached. This application provides a method for refractory material construction at the irregular brick support plate of the high-temperature reducing gas pipeline in a hydrogen-based vertical shaft furnace, enabling smooth and reliable construction and ensuring construction quality. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a design drawing of the refractory material arrangement at the irregular brick support plate of the high-temperature reducing gas pipeline in this application embodiment;

[0017] Figure 2 This is a schematic diagram showing the completion of the first layer of castable refractory in an embodiment of this application;

[0018] Figure 3 This is a schematic diagram showing the completion of the second layer of castable material on the outer side of brick No. 7 in this embodiment of the application;

[0019] Figure 4 This is a schematic diagram showing the completed laying of the expanded cotton in an embodiment of this application;

[0020] Figure 5 This is a schematic diagram showing the completion of bricklaying No. 6 in an embodiment of this application;

[0021] Figure 6 This is a schematic diagram showing the completed laying of the expanded cotton in an embodiment of this application;

[0022] Figure 7This is a schematic diagram showing the completed construction of bricks No. 5 and No. 4 in the embodiments of this application;

[0023] Figure 8 This is a schematic diagram showing the completion of the first layer of castable refractory on the outer side of bricks No. 6, No. 5, and No. 4 in the embodiments of this application. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0025] See Figure 1-8 The embodiments of this application provide a refractory material construction method for the irregular brick plate 2 of the high-temperature reducing gas pipeline 1 of a hydrogen-based vertical furnace, including the following steps:

[0026] (1) Acceptance of high temperature reducing gas pipeline 1 upon arrival.

[0027] (2) Apply fiber paper to the irregular brick support plate 2.

[0028] (3) Apply asphalt to the anchor 3 inside the high-temperature reducing gas pipeline 1.

[0029] (4) Interface protection of secondary screw-on anchor 3.

[0030] (5) Construction of the first layer of castable 4 (CASTDB) on the inner wall of the high-temperature reducing gas pipeline 1, except for the two irregular brick support plates.

[0031] In the above steps, formwork is erected for the first layer of castable refractory 4. A 494mm gap is left above the lowest point on the inner side of the irregularly shaped brick support plate 2 without formwork. This means that an additional 50mm is added to the height of bricks 9 (No. 4), 8 (No. 5), and 7 (No. 6) as the final reserved height to facilitate subsequent castable refractory construction. After the formwork is erected, the first layer of castable refractory 4 is poured between the inner wall of the high-temperature reducing gas pipeline 1 and the formwork. After pouring, curing is performed, and the formwork and scaffolding are removed.

[0032] (6) Install sealing plates at the upper and lower ends of the high-temperature reducing gas pipeline 1 for pre-baking. The temperature of the high-temperature reducing gas pipeline 1 is heated from room temperature to 200°C and baked for 60 hours. After baking, remove the sealing plates and allow the temperature inside the high-temperature reducing gas pipeline 1 to cool naturally to room temperature.

[0033] (7) Check if there are cracks of more than 3mm in the first layer of castable 4. If so, remove the first layer of castable 4 at the crack and recast.

[0034] (8) Refractory bricks are laid in the high-temperature reducing gas pipeline 1 until the irregular brick support plate 2 is reached.

[0035] In the above steps, every two layers of refractory bricks are laid, a second layer of castable material 5 (CASTGK-2) is poured between the refractory bricks and the first layer of castable material, and the construction is repeated until the irregular brick support plate 2 is reached.

[0036] (9) Cut the outer side of brick 6 of brick 7 at the irregular brick support plate 2 according to the inclination angle of the inner side of the irregular brick support plate 2.

[0037] In the above steps, during the cutting process of the outer part of brick 6 (No. 7) at the irregular brick support plate 2 according to the inclination angle of the inner side of the irregular brick support plate 2, the processing length of brick 6 (No. 7) is calculated according to the elevation of the irregular brick support plate 2. If the processing length is greater than 1 / 2 of the original brick length, the outer part of brick 6 (No. 7) and the outer part of the next layer of refractory bricks are cut. If the processing length is not greater than 1 / 2 of the original brick length, only the outer part of brick 6 (No. 7) is cut. In addition, a template is made in advance to complete the application of the second layer of castable refractory 5 (CASTGK-2) on the outer part of brick 6 (No. 7).

[0038] (10) Lay 10 pieces of expansion cotton on the outer side of brick 6 of No. 7.

[0039] In the above steps, the expanding cotton 10 will be laid between brick 6 and brick 7.

[0040] (11) A No. 6 brick 7 is laid on the upper part of the irregular brick support plate 2. The inner side of the No. 6 brick 7 is attached to the outer side of the No. 7 brick 6 through the expansion cotton 10.

[0041] (12) Lay expansion cotton (expansion joint fiber cotton) on the upper part of brick 6 of No. 7.

[0042] (13) Build brick 8 on top of brick 6 and brick 7. The bottom of brick 8 is attached to the top of brick 6 with expansion cotton.

[0043] (14) Lay brick 4 on top of brick 8.

[0044] (15) Pour the first layer of castable material 4 (CASTDB) between the outer side of brick No. 6, brick No. 8, and brick No. 4 and the inner wall of the high temperature reducing gas pipeline 1 to complete the construction of the first layer of castable material 4 on the inner wall of the high temperature reducing gas pipeline 1 at the irregular brick support plate 2.

[0045] (16) Lay refractory bricks on the top of brick 49 until the preset end position is reached.

[0046] In the above steps, after every two layers of refractory bricks are laid, a second layer of castable material 5 (CASTGK-2) is poured between the refractory bricks and the first layer of castable material, and the construction is repeated until the end.

[0047] (17) Clean the high-temperature reducing gas pipeline 1.

[0048] (18) Install sealing plates at the upper and lower ends of the high-temperature reducing gas pipeline 1 for pre-baking. The temperature of the high-temperature reducing gas pipeline 1 is heated from room temperature to 350°C and baked for 147 hours. After baking, remove the sealing plates and hoist the pipeline according to the on-site hoisting plan.

[0049] This application ensures the quality of refractory construction in this critical area by optimizing the scope of refractory formwork at two irregularly shaped support brick plates, adjusting the construction procedures, and improving construction process control measures. This application also provides a method for constructing refractory materials at two irregularly shaped support brick plates in a hydrogen-based vertical furnace high-temperature reducing gas pipeline 1, enabling smooth and reliable construction and ensuring construction quality.

[0050] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0051] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for constructing refractory materials at the irregularly shaped support brick plate of a high-temperature reducing gas pipeline in a hydrogen-based vertical furnace, characterized in that... Includes the following steps: Construction of the first layer of castable refractory on the inner wall of the high-temperature reducing gas pipeline, except for the irregular brick support plate; Refractory bricks are laid inside the high-temperature reducing gas pipeline until the irregular brick support plate is reached. The outer part of brick No. 7 at the irregular brick support plate is cut according to the inclination angle of the inner side of the irregular brick support plate; brick No. 7 is a refractory brick. Expanded cotton was laid on the outer side of the No. 7 brick; A No. 6 brick is laid on the upper part of the irregular brick support plate, and the inner side of the No. 6 brick is attached to the outer side of the No. 7 brick through the expansion cotton; the No. 6 brick is a refractory brick. Expanded cotton was laid on top of the No. 7 brick; Brick No. 5 is laid on top of bricks No. 7 and No. 6, and the bottom of brick No. 5 is attached to the top of brick No. 7 through the expansion cotton. The No. 5 brick is a refractory brick; Brick No. 4 is laid on top of brick No. 5; brick No. 4 is a refractory brick. The first layer of castable material is poured between the outer sides of the No. 6 brick, the No. 5 brick, and the No. 4 brick and the inner wall of the high-temperature reducing gas pipeline, thus completing the construction of the first layer of castable material on the inner wall of the high-temperature reducing gas pipeline at the irregular brick support plate. Refractory bricks are laid on top of the No. 4 brick until the preset end position is reached.

2. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline of the hydrogen-based vertical furnace as described in claim 1, characterized in that, Before constructing the first layer of refractory material on the inner wall of the high-temperature reducing gas pipeline, fiber paper is pasted on the irregular brick support plate, asphalt is applied to the anchors inside the high-temperature reducing gas pipeline, and the interface protective caps of the anchors are screwed on a second time.

3. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline in a hydrogen-based vertical furnace as described in claim 1, characterized in that... During the construction of the first layer of castable refractory, formwork is erected for the first layer of castable refractory. However, 494mm is left unsupported above the lowest point on the inner side of the irregular brick support plate. After the formwork is erected, the first layer of castable refractory is poured between the inner wall of the high-temperature reducing gas pipeline and the formwork. After the pouring is completed, curing is carried out and the mold and scaffolding are removed.

4. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline in a hydrogen-based vertical furnace as described in claim 1, characterized in that, After the first layer of castable refractory is completed, sealing plates are installed at the upper and lower ends of the high-temperature reducing gas pipeline for pre-baking. The temperature of the high-temperature reducing gas pipeline is heated from room temperature to 200°C and baked for 60 hours. After baking, the sealing plates are removed, and the temperature inside the high-temperature reducing gas pipeline naturally cools down to room temperature.

5. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline of the hydrogen-based vertical furnace as described in claim 1, characterized in that, After the first layer of castable refractory is completed, check whether there are cracks larger than 3mm in the first layer of castable refractory. If so, remove the first layer of castable refractory at the crack and re-cast it.

6. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline in a hydrogen-based vertical furnace as described in claim 1, characterized in that, During the process of laying refractory bricks in the high-temperature reducing gas pipeline, a second layer of castable refractory ...

7. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline of the hydrogen-based vertical furnace as described in claim 1, characterized in that, During the cutting process of the outer part of brick No. 7 at the irregular brick support plate according to the inclination angle of the inner side of the irregular brick support plate, the processing length of brick No. 7 is calculated according to the elevation of the irregular brick support plate. If the processing length is greater than 1 / 2 of the original brick length, the outer part of brick No. 7 and the outer part of the next layer of refractory bricks are cut. If the processing length is not greater than 1 / 2 of the original brick length, only the outer part of brick No. 7 is cut.

8. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline of the hydrogen-based vertical furnace as described in claim 1, characterized in that, During the construction of refractory bricks on top of the No. 4 brick, a second layer of castable refractory ...

9. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline of the hydrogen-based vertical furnace as described in claim 1, characterized in that, After the refractory bricks have been laid to the preset end position, the high-temperature reducing gas pipeline is cleaned.

10. The refractory material construction method for the irregularly shaped support brick plate of the high-temperature reducing gas pipeline in a hydrogen-based vertical furnace as described in claim 9, characterized in that, After cleaning the inside of the high-temperature reducing gas pipeline, sealing plates are installed at the upper and lower ends of the pipeline for pre-baking. The temperature of the high-temperature reducing gas pipeline is heated from room temperature to 350°C and baked for 147 hours. After baking, the sealing plates are removed.

Images