A method for online construction of a fire wall

Abstract

The present application relates to the technical field of roasting furnace, and more particularly to a fire channel wall online building method, comprising the following steps: S1, preparation work before building, including equipment preparation, safety protection and cleaning before building; S2, removing the fire channel wall to be repaired, including placing waste brick box, removing the fire channel wall and cleaning the bottom; the waste brick box is divided into high box, middle box and low box according to height, and high box, middle box and low box are used in turn according to the removal progress of the fire channel wall; S3, building the fire channel wall, including hoisting fire channel wall materials, building the fire channel wall, hoisting support frame and installing pouring block; the fire channel wall materials are hoisted in three times, and the required fire bricks for 1 / 3 layers of the total layers of the fire channel are hoisted and built each time; S4, subsequent work after building. The step-by-step implementation of the online building of the fire channel wall is realized, and the removal and building steps are specifically designed, the removal and transportation efficiency of the fire channel to be repaired is improved, the building efficiency is improved, and the safety of workers is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of roasting furnace technology, and in particular to a method for online construction of fire channel walls. Background Technology

[0002] After preheating, heating, and cooling, each chamber of an open-type calcining furnace requires routine maintenance. Over long-term operation, the furnace flue walls deform, including subsidence, bending, and damage, necessitating reconstruction. However, to avoid disrupting normal production, a window of 1-2 chambers is typically allocated for reconstruction. The reconstruction methods are divided into online and offline methods. Currently, most production enterprises use online reconstruction, which involves rebuilding certain flues within a limited timeframe during normal furnace operation. Compared to offline reconstruction, this method eliminates the need for an additional offline reconstruction platform and avoids issues like the inability to install offline-reconstructed flue walls due to excessive deformation, or the problem of hoisting the entire offline-reconstructed flue wall. Using online reconstruction, the dismantling and reconstruction of a flue can be completed within 1-3 days, allowing it to return to production operation.

[0003] Currently, the online construction method for flue walls lacks specific planning steps. From the demolition to the reconstruction of the flue wall, workers operate based on real-time demand, relying on materials as needed. This unplanned, real-time operation presents several problems. For example, during flue wall construction, the required number of refractory bricks for each layer is not pre-designed; the height of the wall is determined by the amount of bricks received. This leads to workers simultaneously hoisting refractory materials into the hopper, compromising worker safety. Furthermore, the construction platform is often a makeshift scaffold or wooden benches, making it impossible to properly match the construction height with the platform, resulting in low efficiency and poor quality. Low efficiency means that when the furnace chamber requiring repair enters the system, the flue wall is still not completely reconstructed, necessitating pre-planning to extend the furnace relocation cycle or postpone the relocation operation to allow for more construction time, thus impacting system output.

[0004] Therefore, in order to improve the efficiency of online construction and enhance operational safety, it is urgent to design an online construction method for fire walls. Summary of the Invention

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an online construction method for fire flue walls, which realizes the step-by-step implementation of online construction of fire flue walls, and specifically designs the dismantling and construction steps, thereby improving the efficiency of dismantling and transferring the fire flue to be repaired, improving construction efficiency, and greatly improving manual safety.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0007] A method for online construction of fire channel walls includes the following steps:

[0008] S1. Preparatory work before construction, including equipment preparation, safety protection and pre-construction cleanup;

[0009] S2. Demolish the fire channel wall to be repaired, including placing waste brick boxes, demolishing the fire channel wall and cleaning the bottom layer; the waste brick boxes are divided into high boxes, medium boxes and low boxes according to their height, and high boxes, medium boxes and low boxes are used in sequence according to the progress of fire channel wall demolition.

[0010] S3. Constructing the fire channel wall, including hoisting the fire channel wall material, constructing the fire channel wall, hoisting the support frame, and installing the cast-in-place blocks; the fire channel wall material is hoisted in three stages, each time hoisting the refractory bricks required for 1 / 3 of the total number of fire channel layers, and after each hoisting, constructing the fire channel wall for 1 / 3 of the total number of fire channel layers.

[0011] S4. Post-construction work, including securing and protecting the newly constructed fire channel and controlling its temperature rise.

[0012] The above-described online construction method enables the phased implementation of online fire channel wall construction. During the demolition process, waste brick boxes of varying heights were used sequentially, improving the efficiency of demolition and transportation of the fire channels to be repaired. Simultaneously, the material feeding and construction steps of the fire channel walls were planned, further enhancing construction efficiency. Furthermore, the newly constructed fire channels can be directly integrated into the system, ensuring normal system operation and not affecting system output. By planning the construction steps and equipment in advance, manual safety is significantly improved.

[0013] Furthermore, the specific steps of the preparatory work before construction in step S1 include:

[0014] S11. Prepare waste brick boxes, support frames, and safety facilities, including safety nets;

[0015] S12. Lay a safety net over the material box where the fire channel to be repaired is located, and isolate the material box from the adjacent material box at the transverse wall.

[0016] S13. Move the materials required for construction to a location that is easy to operate;

[0017] S14. Clean the filler material that is stuck to the bottom and sides of the material box adjacent to the fire channel to be repaired.

[0018] By rationally planning the preparatory work before construction, we can ensure that the construction work is carried out efficiently.

[0019] Furthermore, in step S2, the length of the waste brick box is (box length - 200) / 2mm, the width is (box width - 200) / 2mm, the height of the high box is 1.5m, the height of the medium box is 1.0m, the height of the low box is 0.5m, and there are 4 of each type of waste brick box;

[0020] The support frame has a length of 100mm (length of the material box), a width of 200mm (width of the material box), and a height of 1 / 3 of the height of the fire channel wall.

[0021] By specifically designing the dimensions of the waste brick boxes, they are made more suitable for online construction work, further improving the efficiency of dismantling and transporting the fire channels to be repaired, thereby improving the efficiency of online construction.

[0022] Furthermore, the specific steps for dismantling the fire channel wall to be repaired in step S2 include:

[0023] S21. Place the four tall boxes at the bottom of the material box. The four tall boxes are placed in pairs at the bottom of the fire channels adjacent to the fire channels to be repaired, with the two tall boxes in each group placed close together.

[0024] S22. Remove the cast-in-place blocks at the top of the fire channel wall and move them away from the fire channel area;

[0025] S23. Dismantle the fire channel wall and load the dismantling materials into the high box until the high box is full;

[0026] S24. Move the high box away and place 4 medium boxes in the original position;

[0027] S25. Remove the fire channel wall and load the demolition materials into the middle box until the middle box is full;

[0028] S26. Move the middle box away and place 4 low boxes in the original position;

[0029] S27. Remove the fire wall down to the second layer of the fire wall, and put the removal materials into the low box. The bottom layer of the fire wall is the first layer, and the second layer is above the first layer.

[0030] S28. Clean the first layer of fire channel wall and check for damage. If damaged, remove it, put it into the lower box, and clean it again.

[0031] By designing specific steps for dismantling the fire channel wall to be repaired, the orderly dismantling of the fire channel wall to be repaired was achieved. Furthermore, by rationally allocating waste brick boxes of different heights, the efficiency of dismantling and transporting the fire channel wall to be repaired was improved.

[0032] Furthermore, the specific steps for constructing the fire channel wall in step S3 include:

[0033] S31. Construct and calibrate the first-layer fire channel, wherein the bottom layer of the fire channel wall is the first layer;

[0034] S32. Hoist the refractory bricks required for the second layer of the fire channel to 1 / 3 of the total number of fire channel layers into the material box to construct the fire channel;

[0035] S33. Hoist the first layer of support frame into the material box and place it stably along the side of the material box;

[0036] S34. Hoist the refractory bricks required from the layer above 1 / 3 of the total number of fire passages to 2 / 3 of the total number of fire passages into the material box to construct the fire passages;

[0037] S35. Hoist the second layer support frame into the material box and place it stably along the side of the material box.

[0038] S36. Hoist the refractory bricks required from the layer above 2 / 3 of the total number of fire passages to the top layer of the fire passage into the material box to construct the fire passage;

[0039] S37. The top of the fire channel is covered with cast-in-place blocks.

[0040] By designing specific steps for constructing fire flue walls, orderly construction of fire flue walls was achieved. By rationally planning the construction height of fire flue walls and the corresponding refractory materials for hoisting, construction efficiency was improved, multiple transfers of refractory materials were avoided, and manual safety was greatly enhanced.

[0041] Furthermore, step S37 also includes laying a fiber blanket on the top of the fire channel top layer and then placing the casting blocks thereon. The casting blocks are separated by fiber blankets. After the casting blocks are laid, all support frames and items that fall during construction are moved away from the material box.

[0042] Furthermore, the specific steps of the subsequent construction work in step S4 include:

[0043] S41: Loading the furnace into the adjacent hopper of the newly constructed fire channel wall, including raw blocks and filler material, to fix the new fire channel wall;

[0044] S42: Put the newly constructed fire channel into production, and adjust the fire channel heating rate to be 100-150℃ lower than the temperature of the conventional fire channel.

[0045] By designing specific steps for subsequent construction work, a relatively slow heating rate can be ensured after the fire channel is completed and enters the production system, which helps to extend the service life of the newly constructed fire channel wall.

[0046] The beneficial effects of this invention are:

[0047] This invention discloses an online construction method for fire channel walls, enabling step-by-step online construction. During the demolition process, waste brick boxes of varying heights are used sequentially, improving the efficiency of demolition and transportation of the fire channel to be repaired. Simultaneously, the method plans the material feeding and construction steps for the fire channel walls, further enhancing construction efficiency. Furthermore, the newly constructed fire channel can be directly integrated into the system, ensuring normal system operation and not affecting system output. By pre-planning the construction steps and equipment, manual safety is significantly improved.

[0048] By designing specific steps for dismantling the fire channel wall to be repaired, the orderly dismantling of the fire channel wall to be repaired was achieved. Furthermore, by rationally allocating waste brick boxes of different heights, the efficiency of dismantling and transporting the fire channel wall to be repaired was improved.

[0049] By designing specific steps for constructing fire flue walls, orderly construction of fire flue walls was achieved. By rationally planning the construction height of fire flue walls and the corresponding refractory materials for hoisting, construction efficiency was improved, multiple transfers of refractory materials were avoided, and manual safety was greatly enhanced.

[0050] By designing specific steps for subsequent construction work, a relatively slow heating rate can be ensured after the fire channel is completed and enters the production system, which helps to extend the service life of the newly constructed fire channel wall. Attached Figure Description

[0051] Figure 1 This is a flowchart of an online fire channel wall construction method according to the present invention;

[0052] Figure 2 This is a schematic diagram of the tall box structure of the waste brick box used in this invention;

[0053] Figure 3 This is a schematic diagram of the support frame structure used in this invention. Detailed Implementation

[0054] To better explain and facilitate understanding of the present invention, it will be described in detail below with reference to the accompanying drawings and specific embodiments. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a clearer and more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0055] like Figure 1 As shown, an online construction method for fire channel walls includes the following steps:

[0056] S1. Preparatory work before construction, including equipment preparation, safety protection and pre-construction cleanup;

[0057] S2. Demolish the fire channel wall to be repaired, including placing waste brick boxes, demolishing the fire channel wall and cleaning the bottom layer; the waste brick boxes are divided into high boxes, medium boxes and low boxes according to their height, and high boxes, medium boxes and low boxes are used in sequence according to the progress of fire channel wall demolition.

[0058] S3. Constructing the fire channel wall, including hoisting the fire channel wall material, constructing the fire channel wall, hoisting the support frame, and installing the cast-in-place blocks; the fire channel wall material is hoisted in three stages, each time hoisting the refractory bricks required for 1 / 3 of the total number of fire channel layers, and after each hoisting, constructing the fire channel wall for 1 / 3 of the total number of fire channel layers.

[0059] S4. Post-construction work, including securing and protecting the newly constructed fire channel and controlling its temperature rise.

[0060] The above-described online construction method enables the phased implementation of online fire channel wall construction. During the demolition process, waste brick boxes of varying heights were used sequentially, improving the efficiency of demolition and transportation of the fire channels to be repaired. Simultaneously, the material feeding and construction steps of the fire channel walls were planned, further enhancing construction efficiency. Furthermore, the newly constructed fire channels can be directly integrated into the system, ensuring normal system operation and not affecting system output. By planning the construction steps and equipment in advance, manual safety is significantly improved.

[0061] Specifically, the preparatory work before construction in step S1 includes the following steps:

[0062] S11. Prepare waste brick boxes, support frames, and safety facilities, including safety nets;

[0063] S12. Lay a safety net over the material box where the fire channel to be repaired is located, and isolate the material box from the adjacent material box at the transverse wall.

[0064] S13. Move the materials required for construction to a location that is easy to operate;

[0065] S14. Clean the filler material that is stuck to the bottom and sides of the material box adjacent to the fire channel to be repaired.

[0066] By rationally planning the preparatory work before construction, we can ensure that the construction work is carried out efficiently.

[0067] The safety facilities also include safety railings and fall arrestors, which are necessary for on-site safety.

[0068] Specifically, in step S2, the length of the waste brick box is (box length - 200) / 2mm, the width is (box width - 200) / 2mm, the height of the high box is 1.5m, the height of the medium box is 1.0m, the height of the low box is 0.5m, and there are 4 of each type of waste brick box;

[0069] The support frame has a length of 100mm (length of the material box), a width of 200mm (width of the material box), and a height of 1 / 3 of the height of the fire channel wall.

[0070] The high-box structure and support frame structure of the waste brick box are... Figures 2-3 As shown.

[0071] By specifically designing the dimensions of the waste brick boxes, they are made more suitable for online construction work, further improving the efficiency of dismantling and transporting the fire channels to be repaired, thereby improving the efficiency of online construction.

[0072] This size already takes into account the narrowing of the material box due to the deformation of the fire channel, and also considers the lifting operation space, making it highly applicable. Lifting lugs are welded to the ends of both the waste brick box and the support frame for easy lifting operations.

[0073] Specifically, the steps for dismantling the fire channel wall to be repaired in step S2 include:

[0074] S21. Place the four tall boxes at the bottom of the material box. The four tall boxes are placed in pairs at the bottom of the fire channels adjacent to the fire channels to be repaired, with the two tall boxes in each group placed close together.

[0075] S22. Remove the cast-in-place blocks at the top of the fire channel wall and move them away from the fire channel area;

[0076] S23. Dismantle the fire channel wall and load the dismantling materials into the high box until the high box is full;

[0077] S24. Move the high box away and place 4 medium boxes in the original position;

[0078] S25. Remove the fire channel wall and load the demolition materials into the middle box until the middle box is full;

[0079] S26. Move the middle box away and place 4 low boxes in the original position;

[0080] S27. Remove the fire wall down to the second layer of the fire wall, and put the removal materials into the low box. The bottom layer of the fire wall is the first layer, and the second layer is above the first layer.

[0081] S28. Clean the first layer of fire channel wall and check for damage. If damaged, remove it, put it into the lower box, and clean it again.

[0082] By designing specific steps for dismantling the fire channel wall to be repaired, the orderly dismantling of the fire channel wall to be repaired was achieved. Furthermore, by rationally allocating waste brick boxes of different heights, the efficiency of dismantling and transporting the fire channel wall to be repaired was improved.

[0083] Furthermore, the specific steps for constructing the fire channel wall in step S3 include:

[0084] S31. Construct and calibrate the first-layer fire channel, wherein the bottom layer of the fire channel wall is the first layer;

[0085] S32. Hoist the refractory bricks required for the second layer of the fire channel to 1 / 3 of the total number of fire channel layers into the material box to construct the fire channel;

[0086] S33. Hoist the first layer of support frame into the material box and place it stably along the side of the material box;

[0087] S34. Hoist the refractory bricks required from the layer above 1 / 3 of the total number of fire passages to 2 / 3 of the total number of fire passages into the material box to construct the fire passages;

[0088] S35. Hoist the second layer support frame into the material box and place it stably along the side of the material box.

[0089] S36. Hoist the refractory bricks required from the layer above 2 / 3 of the total number of fire passages to the top layer of the fire passage into the material box to construct the fire passage;

[0090] S37. The top of the fire channel is covered with cast-in-place blocks.

[0091] By designing specific steps for constructing fire flue walls, orderly construction of fire flue walls was achieved. By rationally planning the construction height of fire flue walls and the corresponding refractory materials for hoisting, construction efficiency was improved, multiple transfers of refractory materials were avoided, and manual safety was greatly enhanced.

[0092] Taking a total of 54 fire tunnel layers as an example, step S32 constructs layers 2 to 18, step S34 constructs layers 19 to 36, and step 36 constructs layers 37 to 54. During construction, the horizontal vertical joints are controlled at 2-3mm, and the thickness of the refractory mortar between the refractory brick layers is controlled at 2.5-3mm.

[0093] Specifically, step S37 further includes laying a fiber blanket on the top of the fire channel top layer and then placing the casting blocks thereon. The casting blocks are separated by fiber blankets. After the casting blocks are laid, all support frames and items that fall during construction are moved away from the material box.

[0094] Specifically, the specific steps of the subsequent construction work in step S4 include:

[0095] S41: Loading the furnace into the adjacent hopper of the newly constructed fire channel wall, including raw blocks and filler material, to fix the new fire channel wall;

[0096] S42: Put the newly constructed fire channel into production, and adjust the fire channel heating rate to be 100-150℃ lower than the temperature of the conventional fire channel.

[0097] By designing specific steps for subsequent construction work, a relatively slow heating rate can be ensured after the fire channel is completed and enters the production system, which helps to extend the service life of the newly constructed fire channel wall.

[0098] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for online construction of a firewall, characterized by, The method comprises the following steps: S1, preparation before construction, including equipment preparation, safety protection and cleaning before construction; S2, removing the fire channel wall to be repaired, including placing waste brick boxes, removing the fire channel wall and cleaning the bottom layer; the waste brick boxes are divided into high boxes, middle boxes and low boxes according to the height, and the high boxes, the middle boxes and the low boxes are used in turn according to the removal progress of the fire channel wall; S3, constructing the fire channel wall, including hoisting the fire channel wall materials, constructing the fire channel wall, hoisting the support frame and installing the pouring block; the fire channel wall materials are hoisted for three times, and the fire bricks required for 1 / 3 layers of the total layers of the fire channel are hoisted each time, and 1 / 3 layers of the total layers of the fire channel wall are constructed after hoisting each time; S4, subsequent work after construction, including fixing protection and temperature control of the newly constructed fire channel.

2. A method for online firewall construction as claimed in claim 1, wherein, The specific steps of the preparation before construction in the step S1 comprise: S11, preparing the waste brick boxes, the support frame and the safety facilities, wherein the safety facilities comprise a safety net; S12, laying the safety net on the material box where the fire channel to be repaired is located, and isolating the material box from the adjacent material box at the cross wall; S13, moving the materials required for construction to a position convenient for operation; S14, cleaning the filling material bonded to the bottom and the side of the adjacent material box of the fire channel to be repaired.

3. The method of claim 1, wherein the method is performed in real time. The length of the waste brick box in the step S2 is (material box length-200) / 2mm, the width is (material box width-200) / 2mm, the height of the high box is 1.5m, the height of the middle box is 1.0m, and the height of the low box is 0.5m, and there are four waste brick boxes of each type; The length of the support frame in the step S2 is the material box length-100mm, the width is the material box width-200mm, and the height is 1 / 3 of the height of the fire channel wall.

4. The method of claim 1, wherein the method is performed in real time. The specific steps of removing the fire channel wall to be repaired in the step S2 comprise: S21, placing four high boxes at the bottom of the material box, wherein the four high boxes are placed in pairs at the bottom of the adjacent fire channels of the fire channel to be repaired, and the two high boxes in each pair are placed closely; S22, removing the pouring block at the top of the fire channel wall and moving away from the fire channel area; S23, removing the fire channel wall, and loading the removed materials into the high box until the high box is full; S24, moving away the high box and placing four middle boxes at the original position; S25, removing the fire channel wall, and loading the removed materials into the middle box until the middle box is full; S26, moving away the middle box and placing four low boxes at the original position; S27, removing the fire channel wall to the second layer of the fire channel wall, loading the removed materials into the low box, wherein the bottom layer of the fire channel wall is the first layer, and the layer above the first layer is the second layer; S28, cleaning the first layer of the fire channel wall, and checking whether it is damaged, if it is damaged, removing the damaged part and loading it into the low box, and cleaning again.

5. The method of claim 1, wherein the method is performed in real time. The specific steps of constructing the fire channel wall in the step S3 comprise: S31, constructing and correcting the first layer of the fire channel, wherein the bottom layer of the fire channel wall is the first layer; S32, hoisting the fire bricks required for the second layer to 1 / 3 layers of the total layers of the fire channel into the material box, and constructing the fire channel; S33, hoisting the first layer of the support frame into the material box and placing it along the side edge of the material box stably; S34, hoisting the fire bricks required for the upper layer of 1 / 3 layers of the total layers of the fire channel to 2 / 3 layers of the total layers of the fire channel into the material box, and constructing the fire channel; S35, hoisting the second layer of the support frame into the material box and placing it along the side edge of the material box stably; S36, the fire channel total layer 2 / 3 layer of the required firebrick to the top layer of the fire channel into the material box, build the fire channel; S37, the top of the top layer of the fire channel is paved with pouring block.

6. A method of building a firewall on-line as claimed in claim 5, wherein, The step S37 also includes laying pouring block on the top of the top layer of the fire channel after laying fiber blanket, the pouring blocks are separated by fiber blanket, and all support frames and falling objects in construction are removed from the material box after the pouring block is paved.

7. The method of claim 1, wherein the method is performed in real time. The specific steps of the subsequent work of the step S4 include: S41: loading the newly built fire channel wall into the adjacent material box, including green block and filling material, for fixing the new fire channel wall; S42: put the newly built fire channel into production, and adjust the heating rate of the fire channel to 100-150℃ lower than the conventional fire channel temperature.

Images