An on-line reforming method for a heating furnace burner

Abstract

The present application relates to the technical field of heating furnace reconstruction of oil refining chemical plant, and particularly relates to an online reconstruction method of a heating furnace burner, which realizes the replacement of an old burner with an integrated new burner without stopping the furnace by cooperation of a furnace bottom sealing mechanism and a sealing plate mechanism, saves huge economic losses caused by stopping work, replaces part of manual work with a burner lifting and transporting mechanism, reduces the operation and maintenance cost of the burner, reduces the safety hazards such as high-temperature burns, and can accurately position the burner and reliably disassemble and install the burner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heating furnace reconstruction in oil refining and chemical plants, and in particular to an online reconstruction method for a heating furnace burner. BACKGROUND

[0002] After the operation of the numerous burners of the heating furnace in an oil refining and chemical plant for 3-5 years, the burners need to be replaced or reconstructed due to natural aging and performance degradation of the equipment. At present, the mainstream method for burner reconstruction is to stop the operation of the heating furnace during a major overhaul of the heating furnace, and then to replace or reconstruct the burners. This stoppage replacement and reconstruction process can achieve standard emission of flue gas, but the stoppage replacement and reconstruction process will cause great economic losses. Taking a 3 million ton / year oil refining and chemical plant as an example, there are 300 burners in the whole plant, and at least 30 days are needed to complete the replacement and reconstruction of the 300 burners. The economic loss caused by one day of stoppage is as high as 10 million yuan, and the economic loss caused by 30 days of stoppage is as high as 300 million yuan. Therefore, it is necessary to propose an online reconstruction process that can achieve standard emission of flue gas.

[0003] In the prior art, there is a technology that mentions an online non-stop furnace low-nitrogen burner reconstruction method, but the process technology for implementing this method is still a technical blank, but the online reconstruction process technology is a basic technology for leading the industry to change in the direction of pollution reduction and carbon reduction, and promoting the green and low-carbon transformation of the industry. It is of great significance to propose an online reconstruction process that can achieve standard emission of flue gas. SUMMARY

[0004] In view of the above problems, the present application provides an online reconstruction method for a heating furnace burner, which maintains the stable operation of the heating furnace through the cooperation of the furnace bottom sealing mechanism and the sealing plate mechanism, replaces the old burner with an integrated new burner without stopping the furnace, and replaces part of the manual work with the burner lifting and transporting mechanism to reduce the burner replacement and maintenance cost and reduce the safety hazards such as high-temperature burns, and can accurately position the burner and reliably disassemble and install it.

[0005] The scheme provided by the present application is as follows:

[0006] An online reconstruction method for a heating furnace burner, comprising a burner lifting and transporting mechanism, a furnace bottom sealing mechanism, a sealing plate mechanism and an integrated new burner, which comprises the following steps when reconstructing the heating furnace burner online:

[0007] S1, placing the burner lifting and transporting mechanism under the heating furnace bottom and the old burner to be removed, aligning and cooperating the burner lifting and transporting mechanism with the burner, removing the old burner and transporting it away through the burner lifting mechanism, and leaving an old burner hole after removing the old burner.

[0008] The burner lifting and transporting mechanism has movable and liftable functions, the weight of a single burner is about 200 kg, manual dismounting and mounting of the burner is time-consuming and laborious, and there is a risk of high-temperature burn, the burner lifting and transporting mechanism is lifted to the position of the old burner, the dismounted old burner directly falls into the burner lifting and transporting mechanism, and then is transported, so that labor is saved and safety is ensured.

[0009] S2, the sealing plate mechanism is mounted to the old burner hole.

[0010] The sealing plate mechanism seals the old burner hole left after the old burner is dismounted. The heating furnace generally has a plurality of burners, and it is necessary to complete the processes of extinguishing, cooling, dismounting, mounting, igniting and debugging one by one. After some burners are dismounted and replaced, the combustion effect is not ideal, and it is necessary to dismount, check, repair and re-mount and debug again. In the above processes, after the old burner is dismounted, a large space gap old burner hole is formed at the bottom of the heating furnace, the inside of the furnace is a negative pressure environment, normal temperature and pressure air can be sucked into the furnace from the old burner hole at the bottom of the furnace, so as to cause temperature and pressure fluctuation in the furnace, and further affect the process stability of the heating furnace. Therefore, the sealing plate mechanism is mounted quickly and reliably at the moment when the old burner hole is formed at the bottom of the furnace, so that the large space gap is reliably sealed, the temperature, pressure and oxygen content in the furnace are stabilized, and valuable time is gained for the next integrated new burner mounting.

[0011] S3, the old burner is transported away through the burner lifting and transporting mechanism, and the furnace bottom sealing mechanism is placed below the old burner hole through the burner lifting and transporting mechanism.

[0012] S4, the sealing plate mechanism is dismounted, and the furnace bottom sealing mechanism is mounted to the old burner hole.

[0013] The furnace bottom sealing mechanism is an important device for ensuring the sealing and safety of the heating furnace. After the burner is normally mounted to the bottom and fastened and put into operation in the working state, the role of the furnace bottom sealing mechanism is to prevent combustible gas and high-temperature flue gas components in the furnace from leaking to the outside space. In the process of dismounting the old burner and mounting the new burner in the burner reforming state, the role of the furnace bottom sealing mechanism is to ensure the integrity of the furnace bottom lining structure and provide a complete and reliable operation space for the online reform of the burner. The installation of the furnace bottom sealing mechanism can reform the old heating furnace, and when the old heating furnace is dismounted and replaced after the reform of the furnace bottom sealing mechanism, the safe and stable operation of the heating furnace can be maintained, and the online reform of the burner can be smoothly and orderly promoted.

[0014] S5, the integrated new burner is placed below the furnace bottom sealing mechanism mounted in S3 through the burner lifting and transporting mechanism.

[0015] S6, install integrated new burner.

[0016] The integrated new burner used in the application has the performance characteristics of high-efficiency combustion and low pollution emission. The difficulty of online transformation is to complete the replacement and transformation of the burner under the normal operation of the heating furnace. The replacement and transformation process is required to be fast, safe and reliable. The integrated burner has the beneficial effects of compact structure, convenient disassembly and installation, which lays an important foundation for the smooth implementation of online transformation.

[0017] The furnace bottom sealing mechanism has a burner through hole in the middle, which is matched with the diameter of the integrated new burner for installing the integrated new burner. The furnace bottom sealing mechanism includes a sealing part and a bottom plate. The sealing part is arranged on the bottom plate, and the bottom plate can be connected with the bottom of the heating furnace in a bolted or welded manner. The sealing part extends into the heating furnace to improve the sealing performance of the furnace bottom, prevent the absorption of outside air into the furnace to cause oxygen content fluctuation, and prevent the leakage of high-temperature flue gas and high-temperature combustible gas in the furnace to the outside space. The outer diameter of the sealing part is matched with the diameter of the old burner hole for sealing.

[0018] Further, the sealing part includes three circular metal plates with the same center. The metal plates include an inner layer plate, a middle layer plate and an outer layer plate from inside to outside. The thickness of the three metal plates is not less than 1mm, and the height is not less than 50mm, which meets the process specification requirements and performance requirements. The radial distance between the inner layer plate and the middle layer plate is not less than 20mm, and the distance between the middle layer plate and the outer layer plate is not less than 50mm. The inner layer plate surrounds the burner through hole, and the outer layer plate surrounds the outer diameter of the sealing part.

[0019] The inner layer plate and the middle layer plate are provided with heat insulation cotton, and the thickness of the heat insulation cotton meets the process specification requirements and performance requirements. The heat insulation cotton has a certain elastic expansion space to ensure the gap adjustment space for the installation of the burner. The extrusion effect of the outer wall surface of the burner and the inner wall surface of the heat insulation cotton can also improve the sealing performance, prevent the absorption of outside air into the furnace to cause oxygen content fluctuation, and prevent the leakage of high-temperature flue gas and high-temperature combustible gas in the furnace to the outside space. The distance between the inner layer plate and the middle layer plate is determined according to the thickness of the heat insulation cotton. Therefore, in combination with the characteristics of the heat insulation cotton, the inner diameter of the burner through hole surrounded by the inner layer plate can be slightly smaller than the diameter of the integrated new burner, providing a gap adjustment space.

[0020] The outer layer plate and the middle layer plate are provided with refractory bricks for ensuring the rigidity and strength of the sealing mechanism. The thickness of the refractory bricks meets the process specification requirements and performance requirements. The distance between the middle layer plate and the outer layer plate is determined according to the thickness of the refractory bricks.

[0021] Better, the inner layer plate and the middle layer plate, the middle layer plate and the outer layer plate are provided with a plurality of nails, so that the thermal insulation cotton and the refractory brick are more stable. The nail is made of heat-resistant steel material, the cylindrical steel structure, the nail diameter is not less than 5mm, the nail adopts V-shaped welding structure, the V-shaped angle is not more than 60°, which needs to meet the process specification requirements and the performance requirements. When the subsequent burner is replaced again, if the local thermal insulation cotton is damaged, the new thermal insulation cotton can be installed to fill up by relying on the holding effect of the nail.

[0022] The furnace bottom sealing mechanism of the application is a one-time transformation of the old heating furnace, which can effectively improve the sealing and strength of the bottom of the heating furnace, so that the modified heating furnace can maintain stable operation during the subsequent replacement of the burner, and the replacement process can be orderly promoted. During the subsequent replacement process of the burner, the furnace bottom sealing mechanism does not need to be installed again, and only the thermal insulation cotton needs to be filled according to the damage of the thermal insulation cotton.

[0023] The sealing plate mechanism includes a cover plate and a metal mesh, the metal mesh is arranged on one side of the cover plate, the cover plate can be connected with the bottom of the heating furnace, and the metal mesh faces the inside of the furnace; the outer diameter of the metal mesh matches the diameter of the old burner hole. The thickness of the metal plate is not more than 3mm, and the diameter is determined according to the old burner hole, which is generally more than 50mm larger than the diameter of the old burner hole, facilitating installation. A plurality of bolt holes are arranged on the outer circumferential side of the cover plate, and the cover plate is installed on the bottom of the heating furnace through bolts.

[0024] The metal mesh is provided with thermal insulation cotton, and the thermal insulation cotton is provided with nails for fixing the thermal insulation cotton. The thickness of the thermal insulation cotton is generally not less than 50mm, and the diameter is about 10mm smaller than the old burner hole, facilitating the arrangement of the metal mesh. The thermal insulation cotton is made of heat-resistant, heat-insulating and non-combustible material. The nail is made of heat-resistant steel material, the cylindrical steel structure, the nail length is not less than 50mm, the diameter is not less than 5mm, the V-shaped welding structure is adopted, the V-shaped angle is not more than 60°, and the process specification requirements and the performance requirements need to be met. The metal mesh is cylindrical, which can cover and compact the thermal insulation cotton, and is welded on the cover plate.

[0025] The burner lifting and transporting mechanism includes a base, a lifting device, a rotating table, a burner holder and universal wheels. The lower end of the lifting device is connected with the base, and the upper end of the lifting device is connected with the rotating table. The rotating table can rotate freely within a range of 360°. The burner holder is arranged on the rotating table and can rotate through the rotating table. The structure of the burner holder is not limited, and can match the old burner and the integrated new burner. The burner holder can match the flange plate at the bottom of the burner to accurately position the position of the burner. The universal wheels are arranged below the base, so that the whole burner lifting and transporting mechanism can be horizontally pushed and moved. The brake mechanism is arranged on the universal wheels to limit the position of the burner lifting and transporting mechanism.

[0026] The integrated new burner of the application adopts fuel dispersion injection staged combustion technology, a natural air inlet long-lasting lamp suitable for multiple fuels is arranged at the center position, a circle of refractory basin bricks are additionally arranged, a circle of grooves with holes are reserved on the upper edge of the refractory basin bricks, a circle of fuel injection guns are uniformly distributed on the inner cylindrical surface of the refractory basin bricks, a circle of fuel injection guns are uniformly distributed on the outer cylindrical surface of the refractory basin bricks, and the inner and outer injection guns correspond to each other. The important feature of the integrated new burner is that the fuel injected by the inner and outer circle of fuel injection guns converges on the upper edge of the refractory basin bricks, and a stable flame is formed in the vortex stagnation zone formed at the hole groove position on the upper edge of the refractory basin bricks. The fuel injection guns are uniformly distributed on the inner and outer circumferences of the refractory basin bricks to form a circular cylindrical flame. This flame has the characteristics of dispersed reaction zone, no local high heat accumulation, and large flame radiation heat exchange area, can produce beneficial effects of inhibiting the generation of thermal nitrogen oxides, and at the same time, through large-area heat exchange, the overall heat exchange efficiency of the heating furnace is improved, and the energy efficiency is improved.

[0027] The integrated new burner of the application has compact structure, the diameter is 76-200mm smaller than that of the old burner, and the reduced diameter space is used for installing the above-mentioned furnace bottom sealing mechanism. The integrated new burner can be fixedly installed on the bottom plate of the furnace bottom sealing mechanism through the mounting flange.

[0028] Compared with the prior art, the application has the following advantages:

[0029] 1. Compared with the traditional shutdown modification process, the application can avoid the shutdown of the chemical heating furnace, and save the huge economic losses caused by the shutdown.

[0030] 2. The installation of the furnace bottom sealing mechanism can maintain the safe and stable operation of the heating furnace, promote the online modification of the burner in a stable and orderly manner, and realize one-time sealing modification of the old heating furnace. When the burner needs to be replaced again in the future, the furnace bottom sealing mechanism does not need to be installed again to maintain the safe and stable operation of the heating furnace.

[0031] 3. The sealing plate mechanism reliably seals the large space hole after the old burner is removed, ensures the stability of the temperature, pressure and oxygen content in the heating furnace, and wins enough time for the online modification of the heating furnace.

[0032] 4. The burner lifting and transporting mechanism can partially replace manual work, avoid high-temperature burns, ensure the safety of the working environment of the heating furnace, reduce the labor input during the disassembly and assembly of the burner, and reduce the operation and maintenance cost. At the same time, the burner lifting and transporting mechanism can assist in precise positioning and reliable installation of the burner.

[0033] 5. The integrated new burner has compact structure, is convenient to disassemble, has high combustion efficiency and low pollution emission.

[0034] 6. This invention is applicable to all types of heating furnaces in the fields of coal chemical and petrochemical industries, and is suitable for different loads, different working conditions, and different fuels, thus having a wide range of applications. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of a heating furnace.

[0036] Figure 2 This is a structural diagram of the furnace bottom sealing mechanism.

[0037] Figure 3 This is a structural diagram of the sealing plate mechanism.

[0038] Figure 4 This is a structural diagram of a lifting and transport mechanism.

[0039] Figure 5 This is a structural diagram of the integrated new burner.

[0040] Figure 6 This is a diagram showing the combination of the furnace bottom sealing mechanism and the integrated new burner.

[0041] In the diagram, 1. Burner, 2. Heating furnace, 3. Refractory brick, 4. Outer plate, 5. Base plate, 6. Middle plate, 7. Insulation cotton, 8. Claw nail, 9. Inner plate, 10. Metal mesh, 11. Cover plate, 12. Track, 13. Lifting rod, 14. Base, 15. Casters, 16. Claw rotating rod, 17. Roller, 18. Rotating support rod, 19. Burner bracket, 20. Claw, 21. Mounting flange, 22. Flange. Detailed Implementation

[0042] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0043] like Figure 1 As shown in the typical bottom-fired heater of an oil refinery, the heater 2 has twenty burners 1 evenly arranged at the bottom. Each old burner needs to be replaced with a new one to meet operational and performance requirements. The order in which to replace each burner 1 depends on the experience of the combustion engineer, based on the burner's heat load and flame health. Generally, replacement should begin with burners with low heat loads and unsatisfactory combustion conditions. The replacement process for each burner is as follows: extinguish the burner, remove the burner, install the new burner, ignite the new burner, and adjust it to the required heat load. Then, the next burner is considered for replacement. The entire process requires the support of the burner lifting and transport mechanism, the furnace bottom sealing mechanism, the sealing plate mechanism, and the integrated new burner included in this invention.

[0044] like Figure 2As shown, the furnace bottom sealing mechanism includes a circular bottom plate 5, one side of which is welded with a concentric circular steel plate, divided into an inner layer plate 9, a middle layer plate 6, and an outer layer plate 4. The thickness of the steel plate is not less than 1 mm, and the height is 500 mm, which needs to meet the process specification requirements and performance requirements. The inner layer plate 9 and the middle layer plate 6 are filled with insulation cotton 7, and the nails 8 are embedded to stabilize the insulation cotton 7. The thickness of the insulation cotton 7 needs to meet the process specification requirements and performance requirements, and it is fireproof and heat-resistant, with a thickness of 50 mm. The middle layer plate 6 and the outer layer plate 4 are filled with firebricks 3, and one end of the nails 8 is generally embedded in the firebricks 3 for greater stability. The thickness of the firebricks 3 needs to meet the process specification requirements and performance requirements, and in this embodiment, it is 50 mm. The nails 8 are made of heat-resistant steel material and have a cylindrical steel structure, with a length of 50 mm and a diameter of 5 mm. They are welded in a V-shaped structure with a V-shaped angle of 60°, which needs to meet the process specification requirements and performance requirements.

[0045] The hole formed by the inner layer plate 9 is a burner through hole, which is used to install an integrated new burner. Since the insulation cotton 7 has a certain elastic expansion space, the diameter of the burner hole is generally about 10 mm smaller than that of the integrated new burner, which ensures the gap adjustment space and improves the sealing performance through mutual extrusion. The outer diameter of the outer layer plate 4 should be the same as the old burner hole left after the old burner 1 is removed.

[0046] In actual design, in order to save costs, the inner layer plate 9 and the middle layer plate 6 can be removed, and only the outer layer plate 4 is retained. The outer layer plate 4 has nails 8 welded on the inner wall and casted with refractory cement. When pouring, several evenly arranged nails are pre-embedded in the inner wall of the refractory cement, and the insulation cotton is hung on the nails for fixation.

[0047] A circle of 12 bolt holes is provided on the outer circumference of the bottom plate 5, which can be adjusted according to the number of bolts pre-embedded in the bottom of the heating furnace. The furnace bottom sealing mechanism is fixed to the bottom of the heating furnace 2 through the bolts passing through the bolt holes. If the bottom of the heating furnace 2 is not pre-embedded with bolts, new bolts can also be used for punching and installation. The bottom plate 5 can also not be provided with bolt holes, and can be directly welded on the bottom of the heating furnace. During installation, one side of the metal plate extends into the interior of the heating furnace.

[0048] As shown in Figure 3 The sealing plate mechanism includes a cover plate 11 and a metal mesh 10, which is arranged on one side of the cover plate 11. The cover plate 11 can be connected with the bottom of the heating furnace 2, and the metal mesh 10 faces the inside of the furnace. The outer diameter of the metal mesh 10 matches the diameter of the old burner hole. The thickness of the cover plate 11 is not less than 3 mm, and the diameter is determined according to the old burner hole, which is generally more than 50 mm larger than the diameter of the old burner hole for easy installation. The metal mesh 10 is a cylinder, and the inside is covered with insulation cotton 7.

[0049] The cover plate 11 is welded with several evenly arranged nails 8 on one side. The nails 8 are made of heat-resistant steel material, cylindrical steel structure, nail length 50mm, diameter 5mm, V-shaped welding structure, V-shaped angle 60°, which needs to meet the process specification requirements and performance requirements. The thermal insulation cotton is fixed on one side of the cover plate 11 through the nails 8. The thermal insulation cotton is a solid cylinder, made of heat-resistant, heat-insulating and non-combustible material, thickness 50mm, diameter less than the inner diameter of the old burner hole about 10mm, which is convenient for arranging the metal mesh 10, and the metal mesh 10 is covered and compacted.

[0050] A circle of 12 bolt holes is arranged on the outer circumference of the cover plate 11, which can be adjusted according to the number of bolts pre-buried on the bottom of the heating furnace 2. The cover plate mechanism is fixed on the bottom of the heating furnace through the bolts passing through the bolt holes. If the bottom of the heating furnace 2 is not pre-buried with bolts, new bolts can also be used for punching and installation. When installing, one side of the metal mesh 10 extends into the inside of the heating furnace.

[0051] As shown in Figure 4 , the new burner lifting and transporting mechanism includes a base 14, a lifting rod 13, a rotating table, a burner holder 19 and universal wheels 15. The base 14 is rectangular, and the lifting rod 13 is installed at the four corners. The lifting rod 13 can be selected as a mechanical or hydraulic lifting rod, with a maximum load capacity of not less than 200kg and a maximum lifting stroke of not less than 0.5m, which meets the performance requirements.

[0052] The upper end of the lifting rod 13 is connected to the rotating table, and a rectangular plate is installed in the middle to strengthen the rigidity of the structure. The rotating table is provided with a circular track 12, a burner holder 19 and three rotating support rods 18 evenly distributed in the circumference. The inner end of the rotating support rod 18 is fixedly connected with the burner holder 19, and the outer end is provided with a roller 17 which is placed in and can roll in the track 12. The burner holder 19 can rotate freely within a range of 360° in the circumference of the rotating table through the roller 17 on the rotating support rod 18.

[0053] The burner holder 19 includes three clamping jaws 20 evenly distributed in the circumference. The clamping jaws 20 are controlled to open and close through the clamping jaw rotating rod 16. Rotating the clamping jaw rotating rod 16 can open the clamping jaws 20 to clamp the flange plate 22 at the bottom of the burner. When disassembling, first remove the hose at the bottom of the burner, raise the rotating table, align the burner holder 19 with the flange plate 22 at the bottom of the old burner, open the clamping jaws 20 to clamp the flange plate 22, and then disassemble the old burner. The disassembled old burner is fixedly received in the burner holder; when installing the integrated new burner, place the flange plate 22 at the bottom of the new burner into the clamping jaws to clamp it, and then raise the rotating table to the corresponding installation position for installation.

[0054] The base 14 is provided with universal wheels 15, so that the whole burner lifting and transporting mechanism can be horizontally pushed and moved, and the universal wheels 15 are provided with brake mechanisms, so that the burner lifting and transporting mechanism can be positioned.

[0055] As shown in Figure 5 and Figure 6 , the integrated new burner is installed on the bottom plate 5 of the furnace bottom through the mounting flange 21, and the integrated new burner can adopt, but is not limited to, fuel dispersion injection staged combustion technology, a natural air inlet long-lasting lamp suitable for multiple fuels is arranged at the center position, and a circle of refractory basin bricks are arranged, the upper edge of the refractory basin bricks is reserved with a circle of slot holes, a circle of fuel injection guns are uniformly distributed on the inner cylindrical surface of the refractory basin bricks, and a circle of fuel injection guns are uniformly distributed on the outer cylindrical surface of the refractory basin bricks, and the inner and outer injection guns are one-to-one corresponding. An important feature of the integrated burner mechanism is that the fuel injected by the inner and outer circle fuel injection guns converges on the upper edge of the refractory basin bricks, and a stable flame is formed in the vortex stagnation zone formed at the hole slot position of the upper edge of the refractory basin bricks, the fuel injection guns are uniformly distributed on the inner and outer circumferences of the refractory basin bricks, and a cylindrical annular flame is formed, the flame has the characteristics of dispersed reaction zone, no local high heat accumulation, and large flame radiation heat exchange area, and can produce beneficial effects of inhibiting the generation of thermal nitrogen oxides, and at the same time, through large-area heat exchange, the overall heat exchange efficiency of the heating furnace is improved, and the energy efficiency is improved.

[0056] The reforming process of the present application is:

[0057] S1, the burner lifting and transporting mechanism is moved to below the old burner 1 to be removed through the universal wheels 15, and the brake is fixed in position. The hose at the bottom of the old burner is removed, the rotating table is lifted up to the flange plate at the bottom of the old burner through the lifting rod 13, the jaw 20 is opened by using the jaw rotating rod 16, the flange plate is clamped, the old burner is removed and falls into the burner clamping seat, and the rotating table is lowered, and the removed old burner is transported out.

[0058] S2, the sealing plate mechanism is installed on the old burner hole through the bolt hole on the cover plate 11, and one side of the metal mesh 10 extends into the heating furnace for temporary sealing.

[0059] S3, after the old burner is transported away, the furnace bottom sealing mechanism is transported to the furnace bottom, and is lifted to the corresponding position.

[0060] S4, the sealing plate mechanism is removed, and the furnace bottom sealing mechanism is installed on the old burner hole through the bolt hole on the bottom plate 5 or directly welded.

[0061] S5, the bottom flange of the integrated new burner is placed on the burner holder 19, clamped with the clamping jaw 20, transported to the corresponding position at the bottom of the heating furnace 2, and inserted into the heating furnace 2 through the lifting of the lifting rod 13, so that the integrated new burner passes through the burner through hole surrounded by the inner layer plate 9 of the furnace bottom sealing mechanism, and the mounting flange 21 on the integrated new burner is aligned with the mounting bolt position by rotating the support rod 18 to rotate the burner holder 19.

[0062] S6, the integrated new burner is installed on the bottom plate 5 through the mounting flange 21, and the modification of the burner is completed.

[0063] The remaining burners can be modified according to the above process in turn.

[0064] The terms used herein are intended to describe embodiments and not to limit the embodiments. Unless otherwise expressly stated, the terms "a", "an" and "the" also include plural forms. When used in the specification, the terms "comprise" and / or "include" indicate the presence of the stated features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components.

[0065] It should be understood that detailed changes can be made without departing from the scope of the present application, especially in the shape, size and arrangement of the construction materials and parts used. The specification and described embodiments are examples, wherein the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A method for online retrofitting of a heating furnace burner, comprising a burner lifting and transport mechanism, a furnace bottom sealing mechanism, a sealing plate mechanism, and an integrated new burner, characterized in that, Includes the following steps: S1. Place the burner lifting and transport mechanism at the bottom of the heating furnace, below the old burner to be removed, align the burner lifting and transport mechanism with the burner, remove the old burner, and leave the old burner hole after the old burner is removed. S2. Install the sealing plate mechanism into the old burner hole; S3. The old burner is transported away by the burner lifting and transport mechanism, and then the furnace bottom sealing mechanism is placed below the holes of the old burner by the burner lifting and transport mechanism. S4. Remove the sealing plate mechanism and install the furnace bottom sealing mechanism into the old burner hole; S5. Place the integrated new burner below the furnace bottom sealing mechanism installed in S3 through the burner lifting and transport mechanism; S6. Install a new integrated burner; The furnace bottom sealing mechanism has a burner through hole in the middle, and the burner through hole matches the diameter of the integrated new burner; The furnace bottom sealing mechanism includes a sealing part and a bottom plate. The sealing part is disposed on the bottom plate, and the bottom plate can be connected to the bottom of the heating furnace. The sealing part extends into the heating furnace. The outer diameter of the sealing part matches the diameter of the hole in the old burner.

2. The method for online retrofitting of a heating furnace burner according to claim 1, characterized in that, The sealing part includes three concentric annular metal plates, and the annular metal plates include an inner plate, a middle plate and an outer plate from the inside to the outside; The inner layer plate surrounds and forms the burner through hole, and the outer layer plate surrounds and forms the outer diameter of the sealing part; Insulation cotton is installed between the inner layer and the middle layer; Refractory bricks are placed between the outer and middle layers.

3. The method for online retrofitting of a heating furnace burner according to claim 2, characterized in that, The thickness of the circular metal plate is not less than 1 mm, and the height is not less than 50 mm; The radial distance between the inner layer and the middle layer is not less than 20 mm, and the distance between the middle layer and the outer layer is not less than 50 mm; The burner through-hole matches the diameter of the integrated new burner for mounting the integrated new burner.

4. A method for online retrofitting of a heating furnace burner according to claim 2 or 3, characterized in that, Several rivets are provided between the inner layer and the middle layer, and between the middle layer and the outer layer.

5. The method for online retrofitting of a heating furnace burner according to claim 1, characterized in that, The sealing mechanism includes a cover plate and a metal mesh. The metal mesh is located on one side of the cover plate. The cover plate can be connected to the bottom of the heating furnace, and the metal mesh faces the inside of the furnace. The outer diameter of the metal mesh matches the diameter of the holes in the old burner.

6. The method for online retrofitting of a heating furnace burner according to claim 5, characterized in that, The metal mesh contains insulating cotton, and the insulating cotton contains anchor points.

7. The method for online retrofitting of a heating furnace burner according to claim 6, characterized in that, The thickness of the insulation cotton shall not be less than 50mm.

8. The method for online retrofitting of a heating furnace burner according to claim 1, characterized in that, The burner lifting and transport mechanism includes a base, a lifting device, a rotating platform, a burner holder, and casters. The lower end of the lifting device is connected to the base, and the upper end of the lifting device is connected to the rotating platform, which is rotatable. The burner holder is mounted on a rotating table, and the burner holder can rotate via the rotating table; The burner mount is compatible with both older burners and new integrated burners; The omnidirectional wheels are located at the bottom of the base.

9. A method for online retrofitting of a heating furnace burner according to any one of claims 1-3 and 5-8, characterized in that, The diameter of the integrated new burner is 76-200mm smaller than that of the old burner, and the integrated new burner is fixedly installed with the furnace bottom sealing mechanism.

Images