Refractory material maintenance method for external combustion type hot blast stove

Abstract

The invention discloses an external combustion type hot blast stove refractory material maintenance method. The method comprises the following steps that a corresponding maintenance range is determined according to the operation state of a hot blast stove; building a construction operation platform at a manhole of the hot blast stove corresponding to the overhaul range; corresponding manholes are opened, and scaffolds and portable protective sheds are erected in a combustion chamber and a heat storage chamber of the hot blast stove; determining a final repair range in the combustion chamber and the heat storage chamber; and maintaining the interiors of the combustion chamber and the heat storage chamber in sequence. According to the refractory material maintenance method for the external combustion type hot blast stove, a standard construction scheme and steps are provided, the construction sequence is reasonable, the construction efficiency is high, and due to standardized operation, the safety risk of construction is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of overhaul of externally fired hot blast stoves, and particularly to a refractory repair method for externally fired hot blast stoves. Background Art

[0002] Externally fired hot blast stoves generally undergo regular overhaul and maintenance. Currently, during the overhaul and maintenance process, generally, the maintenance workers carry out the overhaul according to their own operation experience and operation logic, often resulting in low overhaul and maintenance efficiency, and the safety of the overhaul cannot be well guaranteed. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a refractory repair method for externally fired hot blast stoves, which gives a standard construction plan and steps, and has a reasonable construction sequence and high construction efficiency. Due to the standardized operation, the safety risk of construction is reduced.

[0004] The present invention provides a refractory repair method for externally fired hot blast stoves, including the following steps:

[0005] Determine the corresponding overhaul scope according to the operating state of the hot blast stove;

[0006] Build a construction operation platform at the manhole of the hot blast stove corresponding to the overhaul scope;

[0007] Open the corresponding manhole, and build a scaffold and a portable protective shed in the combustion chamber and regenerator chamber of the hot blast stove;

[0008] Determine the final repair scope inside the combustion chamber and regenerator chamber;

[0009] Repair the inside of the combustion chamber and regenerator chamber in sequence.

[0010] In one embodiment, the step of building a construction operation platform at the manhole of the hot blast stove corresponding to the overhaul scope further includes:

[0011] Build an operation platform at the corresponding manhole position;

[0012] Build a material transportation facility outside the hot blast stove at the corresponding manhole position.

[0013] In one embodiment, the step of opening the corresponding manhole and building a scaffold and a portable protective shed in the combustion chamber and regenerator chamber of the hot blast stove further includes:

[0014] Build a corresponding scaffold in the combustion chamber based on the burners inside;

[0015] Build a corresponding scaffold in the regenerator chamber based on the checker bricks inside.

[0016] Build a portable protective shed in the combustion chamber and the regenerator chamber.

[0017] In one embodiment, the maintenance of the interior of the combustion chamber and the regenerator chamber in sequence further includes:

[0018] Simultaneously remove the refractories of the top connecting pipe and the hot air branch pipe;

[0019] Remove the lower connecting pipe and the large wall of the combustion chamber;

[0020] Demolish and restore the large wall and checker bricks in the regenerator chamber.

[0021] In one embodiment, the demolition and restoration construction of the large wall and checker bricks in the regenerator chamber further includes:

[0022] Replace the shell of the hot air branch pipe, and then replace the shell of the lower connecting pipe;

[0023] Replace the shell of the upper connecting pipe, the hot air branch pipe, the upper connecting pipe and the lower connecting pipe.

[0024] In one embodiment, the construction method further includes:

[0025] After the shells of the hot air branch pipe and the lower connecting pipe pass the acceptance, perform spraying construction on the shells of the hot air branch pipe and the lower connecting pipe and restore the internal refractory bricks in the shells of the hot air branch pipe and the lower connecting pipe;

[0026] After the shell of the upper connecting pipe is installed and passes the acceptance, perform acid-resistant coating construction on the shell of the upper connecting pipe and restore the internal refractory bricks in the shell of the upper connecting pipe;

[0027] After the construction of the lower connecting pipe is completed, restore the large wall of the combustion chamber, remove the burner and restore the burner.

[0028] The refractory maintenance method for the external combustion hot blast stove provided by the present invention gives a standard construction plan and steps, and the construction sequence is reasonable, and the construction efficiency is high. Due to the standardized operation, the safety risk of construction is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a schematic flow chart of the refractory maintenance method for the external combustion hot blast stove provided by the present invention. Detailed Implementation Manner

[0031] The following will describe in detail specific embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the description of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0033] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of description and simplification of description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0034] Terms such as "first", "second", "third", etc. are only used to distinguish elements with similar attributes, rather than indicating or implying relative importance or a specific order.

[0035] The term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion. In addition to including the listed elements, it may also include other elements not specifically listed.

[0036] Please refer to Figure 1 , the refractory repair method for an external combustion hot blast stove provided by the present invention includes the following steps:

[0037] S1. Determine the corresponding overhaul scope according to the operating state of the hot blast stove.

[0038] It can be known that it can be determined by skilled workers according to the production state and combined with past experience, and the arrival plan of overhaul materials can be formulated.

[0039] S2. Set up a construction operation platform at the manhole of the hot blast stove corresponding to the overhaul scope.

[0040] It can be understood that the above steps can further include:

[0041] S201, Set up a working platform at the corresponding manhole position.

[0042] It can be known that the material transportation equipment can transport the construction materials to the working platform and can temporarily place the construction materials.

[0043] S202, Set up the material transportation equipment outside the hot blast stove at the corresponding manhole position.

[0044] It can be known that the material transportation equipment can be a winch and a hoisting equipment, etc.

[0045] S3, Open the corresponding manhole and set up scaffolding and a portable protective shed in the combustion chamber and the regenerator chamber of the hot blast stove.

[0046] It can be understood that the above steps can further include:

[0047] S301, Set up the corresponding scaffolding in the combustion chamber based on the burners inside it.

[0048] It can be known that the safety inside the external combustion hot blast stove can be determined jointly with the owner. After determining the safety, the scaffolding is set up. Based on the burners, it can be that the components for stabilizing the scaffolding are connected and fixed to the burners to ensure the stability and safety of the scaffolding.

[0049] S302, Set up the corresponding scaffolding in the regenerator chamber based on the checker bricks inside it.

[0050] It can be understood that based on the checker bricks, it can be by means of some fixing components to fix the scaffolding on the checker bricks. During the process of setting up the scaffolding, the refractories in the combustion chamber and the regenerator chamber need to be well protected.

[0051] S303, Set up a portable protective shed in the combustion chamber and the regenerator chamber.

[0052] It can be understood that the portable protective shed is convenient for inspection and construction and can prevent the falling objects that may appear above from hurting the construction workers.

[0053] S4, Determine the final repair scope inside the combustion chamber and the regenerator chamber.

[0054] It can be understood that after the scaffolding is set up, an internal damage investigation is carried out. The damage investigation can be by comparing the photos taken by the equipment to determine the final repair scope.

[0055] S5, Repair the inside of the combustion chamber and the regenerator chamber in sequence.

[0056] It can be understood that the above steps can further include:

[0057] S501. Demolish the refractories of the top connecting pipe and the hot air branch pipe simultaneously.

[0058] It can be understood that the top connecting pipe connects the combustion chamber and the regenerator, and the refractory of the hot air branch pipe is the structure for fixing the hot air branch pipe.

[0059] S502. Demolish the lower connecting pipe and the large wall of the combustion chamber;

[0060] S503. Demolish and reconstruct the large wall and checker bricks in the regenerator.

[0061] S503a. Replace the shell of the hot air branch pipe, and then replace the shell of the lower connecting pipe;

[0062] S503b. Replace the shell of the upper connecting pipe, the hot air branch pipe, the upper connecting pipe and the lower connecting pipe.

[0063] S6. After the shells of the hot air branch pipe and the lower connecting pipe pass the acceptance, spray construction is carried out on the shells of the hot air branch pipe and the lower connecting pipe, and the internal refractory bricks in the shells of the hot air branch pipe and the lower connecting pipe are restored;

[0064] After the shell of the upper connecting pipe is installed and passes the acceptance, acid-resistant coating construction is carried out on the shell of the upper connecting pipe, and the internal refractory bricks of the shell of the upper connecting pipe are restored;

[0065] After the construction of the lower connecting pipe is completed, restore the large wall of the combustion chamber, demolish the burner and restore the burner.

[0066] S7. After the construction of the large wall of the combustion chamber is completed, demolish the internal scaffolding in the combustion chamber, demolish and repair the burners that need to be updated. After the construction of the burners and the upper connecting pipe is completed, demolish the portable protection shed and the scaffolding in the regenerator. After the cleaning inside the furnace is completed and confirmed, install the oven-drying device for oven-drying, demolish and clean the external material transportation system. After the oven-drying is completed, thermally plug the manhole.

[0067] As can be seen from the above description, the refractory repair method of the external combustion hot blast stove provided by the present invention gives a standard construction plan and steps, and the construction sequence is reasonable, the construction efficiency is high. Due to the standardized operation, the construction safety risk is reduced.

[0068] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A refractory repair method for an externally fired hot blast stove, characterized in that, It includes the following steps: Determine the corresponding maintenance scope according to the operating status of the hot blast stove; Build a construction operation platform at the manhole of the hot blast stove corresponding to the maintenance scope; Open the corresponding manhole, and build a scaffold and a portable protection shed in the combustion chamber and regenerator chamber of the hot blast stove; Determine the final repair scope inside the combustion chamber and regenerator chamber; Repair the inside of the combustion chamber and regenerator chamber in sequence.

2. The refractory repair method of the externally fired hot blast stove according to claim 1, characterized in that, The building of operation equipment at the manhole of the hot blast stove corresponding to the maintenance scope further includes: Build an operation platform at the corresponding manhole position; Build a material transportation facility outside the hot blast stove at the corresponding manhole position.

3. The refractory repair method for an external combustion hot blast stove according to claim 1, characterized in that, The opening of the corresponding manhole and the building of a scaffold and a portable protection shed in the combustion chamber and regenerator chamber of the hot blast stove further includes: Build a corresponding scaffold based on the burners inside the combustion chamber; Build a corresponding scaffold based on the checker bricks inside the regenerator chamber; Build a portable protection shed in the combustion chamber and regenerator chamber.

4. The refractory repair method for an external combustion hot blast stove according to claim 1, characterized in that, The repair of the inside of the combustion chamber and regenerator chamber in sequence further includes: Simultaneously remove the refractories of the top connecting pipe and the hot blast branch pipe; Remove the lower connecting pipe and the large wall of the combustion chamber; Carry out demolition and restoration construction on the large wall and checker bricks inside the regenerator chamber.

5. The refractory repair method of the externally fired hot blast stove according to claim 4, characterized in that, The carrying out of demolition and restoration construction on the large wall and checker bricks inside the regenerator chamber further includes: Replace the shell of the hot blast branch pipe, and then replace the shell of the lower connecting pipe; Replace the shell of the upper connecting pipe, the hot blast branch pipe, the upper connecting pipe and the lower connecting pipe.

6. The refractory repair method of the externally fired hot blast stove according to claim 5, characterized in that, The construction method further includes: After the shells of the hot blast branch pipe and the lower connecting pipe pass the acceptance, carry out spraying construction on the shells of the hot blast branch pipe and the lower connecting pipe and restore the internal refractory bricks inside the shells of the hot blast branch pipe and the lower connecting pipe; After the shell of the upper connecting pipe is installed and passes the acceptance, carry out acid-resistant coating construction on the shell of the upper connecting pipe and restore the internal refractory bricks inside the shell of the upper connecting pipe; After the construction of the lower connecting pipe is completed, restore the large wall of the combustion chamber, remove the burner and restore the burner.

Images