Furnace tank supporting piece and using method thereof

Abstract

The furnace tank supporting piece comprises a supporting protection plate and a stand column used for supporting the supporting protection plate, the supporting protection plate is attached to the surface of an inner furnace tank, and the bottom of the stand column is slidably connected with the inner wall of an outer furnace tank; the stand columns are elastically connected with the supporting protection plates and used for providing elastic support for the inner furnace tank. By means of the furnace tank supporting piece, the deformation amount of the inner furnace tank in the using process can be effectively reduced, stress concentration of the inner furnace tank can be avoided, and the service life of the inner furnace tank is prolonged.

Description

Technical Field

[0001] This invention relates to the field of furnace sludge pyrolysis, specifically to a furnace support component and its usage method. Background Technology

[0002] During the extraction, storage, and transportation of oil, a thick layer of sludge accumulates at the bottom of facilities such as storage tanks, ship holds, and pipelines. During regular maintenance or repairs, this accumulated sludge is removed from the facilities, and the removed sludge is called tank cleaning sludge.

[0003] Tank sludge is usually a stable mixture of oil, water, and solid particles (such as mud, rust, wax, and asphalt). It may also contain heavy metals and harmful chemicals, and is classified as hazardous waste. Direct discharge of such waste will cause serious pollution to soil and water bodies, and harm the ecological environment and human health.

[0004] The pyrolysis of tank sludge is typically used for the resource recovery of tank sludge. During the pyrolysis process, the tank sludge is placed in an inner furnace tank. A heating layer is set between the outer and inner furnace tanks to heat the inner furnace tank. A shaftless spiral cutter is installed in the inner furnace tank to stir the tank sludge, ensuring that it is heated evenly.

[0005] Since the inner furnace tank is usually supported at both ends, similar to a simply supported beam, the middle part bears the greatest bending stress under this structure. Especially when the inner furnace tank is in a high-temperature environment, the middle part of the furnace tank is prone to deformation under the combined effects of high temperature and material gravity. The huge bending stress will force the middle part of the furnace tank to collapse downward. After the middle part of the furnace tank collapses, the gap between the shaftless spiral reamer and the upper and lower parts of the inner wall of the furnace tank will change. This change in gap will cause frequent friction and collision between the shaftless spiral reamer and the side wall of the inner furnace tank during the rotation of the shaftless spiral reamer, resulting in frequent breakage of the shaftless spiral reamer.

[0006] Currently, in order to prevent deformation of the inner furnace tank, a fixed support structure is set in the middle of the inner furnace tank. This support structure is fixedly connected to the inner wall of the outer furnace tank and supports the side wall of the inner furnace tank at the easily deformable middle position. Although the supported position of the inner furnace tank no longer deforms, new deformation points will appear at the supported position and the two ends of the inner furnace tank, and the shaftless spiral reamer will still frequently break. Summary of the Invention

[0007] The purpose of this invention is to provide a furnace tank support component and its usage method. Using this furnace tank support component can effectively reduce the deformation of the inner furnace tank during use, and can also avoid stress concentration in the inner furnace tank, thereby extending the service life of the inner furnace tank.

[0008] To achieve the above objectives, the present invention provides a furnace tank support component, which includes a support plate and a column for supporting the support plate. The support plate is in contact with the surface of the inner furnace tank, and the bottom of the column is slidably connected to the inner wall of the outer furnace tank. The column and the support plate are elastically connected to provide elastic support to the inner furnace tank.

[0009] Preferably, the furnace support further includes a compressible elastic connection structure, the upper end of which is connected to the support guard plate and the lower end of which is connected to the column.

[0010] Preferably, the elastic connection structure includes an upper end face, a lower end face, and a plurality of elastic elements located between the upper end face and the lower end face.

[0011] Preferably, the plurality of elastic elements are in a compressed state.

[0012] Preferably, the column is made of a high-temperature resistant material.

[0013] The present invention also provides a method of using the furnace support member, the method comprising: Step 1: Based on the actual condition of the inner furnace tank, manufacture the furnace tank support component, and install the furnace tank support component at least at the middle position of the inner furnace tank along the length direction of the inner furnace tank; Step 2: Slowly heat the inner furnace tank; Step 3: After stopping heating, wait for the equipment to cool down and monitor the deformation of the inner furnace tank.

[0014] Preferably, the method of use further includes Step 4: When the shaftless spiral reamer breaks, rotate the inner furnace pot 180° and repeat steps 1-3.

[0015] Preferably, in step 2, the temperature rise curve of the inner furnace tank is controlled during the heating process.

[0016] Preferably, the inner furnace tank is heated in stages.

[0017] According to the above technical solution, the column and the support plate of the present invention are elastically connected, so that the support plate can provide a support force to the inner wall of the inner furnace tank that is proportional to the deformation of the inner furnace tank.

[0018] When the inner furnace pot is heated and begins to bend and deform downwards, the middle part of the inner furnace pot will collapse downwards. The elastic support located at this position will be subjected to the pressure of the inner furnace pot, resulting in compressive deformation. Based on this compressive deformation, the elastic support will generate an upward supporting force on the inner furnace pot. The greater the deformation of the inner furnace pot, the greater the compression of the elastic support, and the greater the upward supporting force it provides.

[0019] The elastic support does not forcibly prevent the deformation of the inner furnace tank, but allows for a certain amount of controllable displacement, and generates just the right amount of support force through this displacement. Because the elastic support is flexible, it will not cause drastic changes in bending moment and stress concentration at the support location, so that the load in the middle part can be smoothly transferred. Therefore, by setting an elastic connection between the column and the support plate, the furnace tank support component can work together with the support points at both ends to share the load.

[0020] When the equipment heats up, the inner furnace tank undergoes radial expansion. Rigid supports constrain this expansion, generating significant thermal stress. Elastic supports, however, can absorb and compensate for this thermal expansion through their own deformation, avoiding additional stress. Furthermore, the inner furnace tank experiences dynamic loads when the material mass changes or when the spiral force is uneven. This furnace tank support provides elastic support to the inner furnace tank and slides with the outer furnace tank, allowing it to automatically adjust its support force according to load changes. It can even slide relative to the outer furnace tank following uneven deformation of the inner furnace tank, ensuring the support consistently supports the sidewalls of the inner furnace tank. Therefore, this furnace tank support exhibits better adaptability to dynamic loads on the inner furnace tank.

[0021] In summary, using this furnace tank support component can effectively reduce the deformation of the inner furnace tank during use, and can also avoid stress concentration in the inner furnace tank, thus extending its service life.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of a furnace support component; Figure 2 This is a structural schematic diagram of a furnace support component; Figure 3 This is a structural schematic diagram of a furnace support component.

[0024] Explanation of reference numerals in the attached figures Detailed Implementation

[0025] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0026] In this invention, unless otherwise stated, directional terms such as "between," "upper end," and "lower end" included in the terminology represent only the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.

[0027] See Figure 1-2 A furnace tank support component includes a support plate 1 and a column 2 for supporting the support plate 1. The support plate 1 is in contact with the surface of the inner furnace tank, and the bottom of the column 2 is slidably connected to the inner wall of the outer furnace tank. The column 2 and the support plate 1 are elastically connected to provide elastic support to the inner furnace tank.

[0028] Through the implementation of the above technical solution, the column 2 and the support plate 1 are elastically connected, so that the support plate 1 can provide a support force to the inner wall of the inner furnace tank that is proportional to the deformation of the inner furnace tank.

[0029] When the inner furnace pot is heated and begins to bend and deform downwards, the middle part of the inner furnace pot will collapse downwards. The elastic support located at this position will be subjected to the pressure of the inner furnace pot, resulting in compressive deformation. Based on this compressive deformation, the elastic support will generate an upward supporting force on the inner furnace pot. The greater the deformation of the inner furnace pot, the greater the compression of the elastic support, and the greater the upward supporting force it provides.

[0030] The elastic support does not forcibly prevent the deformation of the inner furnace tank, but allows for a certain amount of controllable displacement, and generates just the right amount of support force through this displacement. Because the elastic support is flexible, it will not cause drastic bending moment changes and stress concentration at the support position, so that the load in the middle part can be smoothly transferred. Therefore, by setting an elastic connection between the column 2 and the support guard plate 1, the furnace tank support can work together with the support points at both ends to jointly bear the load.

[0031] When the equipment heats up, the inner furnace tank undergoes radial expansion. Rigid supports constrain this expansion, generating significant thermal stress. Elastic supports, however, can absorb and compensate for this thermal expansion through their own deformation, avoiding additional stress. Furthermore, the inner furnace tank experiences dynamic loads when the material mass changes or when the spiral force is uneven. This furnace tank support provides elastic support to the inner furnace tank and slides with the outer furnace tank, allowing it to automatically adjust its support force according to load changes. It can even slide relative to the outer furnace tank following uneven deformation of the inner furnace tank, ensuring the support consistently supports the sidewalls of the inner furnace tank. Therefore, this furnace tank support exhibits better adaptability to dynamic loads on the inner furnace tank.

[0032] In summary, using this furnace tank support component can effectively reduce the deformation of the inner furnace tank during use, and can also avoid stress concentration in the inner furnace tank, thus extending its service life.

[0033] In this embodiment, preferably, the furnace support also includes a compressible elastic connection structure, the upper end of which is connected to the support guard plate 1 and the lower end of which is connected to the column 2.

[0034] When rigid supports are used for the furnace tank support, the original long beam is physically divided into two shorter beams. Each of the two shorter beams forms a new "simply supported beam" with the end support point and the middle rigid support point as fulcrums. Therefore, the inner furnace tank will still deform at the position of the two shorter beams near the middle support.

[0035] By connecting the elastic connection structure to the support plate 1, the inner furnace tank can be supported when the middle section collapses. As the inner furnace tank deforms, the elastic connection structure provides increasing support to the inner furnace tank through the support plate 1. Furthermore, by compressing the elastic connection structure, the inner furnace tank still retains a certain amount of deformation space, effectively avoiding the stress centering problem caused by rigid support. This allows the load in the middle section to be smoothly transferred, improving the service life of the inner furnace tank. Therefore, by setting up an elastic connection structure, not only can the deformation of the inner furnace tank be effectively reduced, but its service life can also be effectively extended.

[0036] In this embodiment, preferably, the elastic connection structure includes an upper end face 31, a lower end face 32, and a plurality of elastic elements 33 located between the upper end face 31 and the lower end face 32.

[0037] The support plate 1 is set to an arc shape consistent with the shape of the inner furnace tank. Preferably, the arc of the support plate 1 is set to approximately 180°, which facilitates fitting with the bottom of the inner furnace tank while providing complete support for the bottom of the inner furnace tank.

[0038] The middle position of the support plate 1 is connected to the middle position of the upper end face 31, so that the elastic connection structure can provide vertical upward support to the support plate 1 through the upper end face 31, thereby enabling the support plate 1 to provide a reliable lifting effect for the bottom of the inner furnace tank.

[0039] As the deformation of the inner furnace tank increases, the upper end face 31 is compressed and displaced downwards. This compresses the multiple elastic elements 33 located between the upper end face 31 and the lower end face 32, thereby increasing the upward elastic force on the upper end face 31. This allows the support plate 1 to provide greater support force to prevent further deformation of the inner furnace tank. Furthermore, when heating stops, the temperature of the inner furnace tank gradually decreases. As the temperature drops, the deformation of the inner furnace tank gradually recovers. During this recovery process, the furnace tank support components continue to provide reliable support and follow the inner furnace tank's deformation recovery. Therefore, by setting an elastic connection structure, reliable and effective support for the inner furnace tank can be achieved, thereby effectively reducing the amount of deformation during use.

[0040] In one embodiment, a plurality of elastic elements 33 are provided between the upper end face 31 and the lower end face 32. These elastic elements 33 are configured to be axially symmetrical about the connection position between the support plate 1 and the upper end face 31, so that the elastic connection structure can provide uniform and stable support to the support plate 1 during use.

[0041] Because the furnace support is used in a high-temperature environment, the high temperature will have a very significant impact on the spring constant. Therefore, when selecting a spring as the elastic element 33, a relatively large spring constant needs to be chosen. In one embodiment, the spring of the vibrating screen is selected with a spring constant of approximately 2.5 x 10. 3 N / m.

[0042] In this embodiment, preferably, the plurality of elastic elements 33 are in a compressed state.

[0043] In one embodiment, mounting ends for installing a spring are respectively provided on the upper end face 31 and the lower end face 32. After the two ends of the spring are respectively sleeved on the two mounting ends, the spring can be reliably fixed between the upper end face 31 and the lower end face 32, and can generate a corresponding amount of deformation according to the pressure. The pre-compression effect of the spring can be achieved by reasonably setting the height of the column. Preferably, pre-compression holes can also be provided on the upper end face 31 and the lower end face 32, and pre-compression bolts can be provided in the pre-compression holes. By tightening the nut at the other end, the spring located between the upper end face 31 and the lower end face 32 can be compressed. After the position of the furnace tank support is determined, removing the pre-compression nut can release the support guard plate 1 to the bottom of the inner furnace tank and fit it against the bottom of the inner furnace tank.

[0044] The pre-compression of the spring generates an initial preload. Under this initial preload, the inner furnace tank is subjected to this preload as it begins to deform. Therefore, the inner furnace tank receives support without actually deforming, which is highly beneficial for controlling its deformation during the preheating stage. Thus, by pre-compressing the elastic element 33, the inner furnace tank is effectively supported in the early stages of deformation, significantly reducing its deformation.

[0045] Furthermore, the heating process of the inner furnace can be controlled during the baking process to coordinate with the operation of the elastic element 33.

[0046] The elastic potential energy obtained by pre-compressing the elastic element 33 is set to match the heating curve of the low-temperature oven, so that the deformation of the inner furnace tank is less than 3cm during the first stage of preheating. During the preheating stage, when the furnace tank expands slightly, the reverse force generated by the pre-compression of the spring can gently restrain the expansion and avoid excessive deformation. After the oven is dried, the temperature of the furnace tank tends to stabilize, and the pre-compression state of the spring matches the hot size of the furnace tank. This allows the furnace tank support and the inner furnace tank to form a dynamic balance during the cooling process, preparing for deformation buffering during formal pyrolysis.

[0047] During pyrolysis, if the inner furnace tank undergoes minor deformation due to temperature fluctuations, such as local bulges or displacement, the elastic element 33 can buffer the pressure caused by the deformation of the inner furnace tank through its own deformation, avoiding stress concentration caused by rigid support. If the deformation accumulates to a certain extent, the precise temperature control capability of the low-temperature oven can reduce the "amplification effect" of thermal stress on deformation by finely adjusting the local temperature of the burner, such as reducing the heating rate of the deformed area. At the same time, when the inner furnace tank is in a high-temperature state, the elastic potential energy of the spring pre-compression can also push the furnace tank to reset to a certain extent. During the heating process, through the synergistic effect of temperature and spring pre-compression, the deformation of the inner furnace tank can be actively repaired.

[0048] In this embodiment, the column 2 is preferably made of a high-temperature resistant material.

[0049] Since the furnace tank support works in a high-temperature environment, in order to ensure the support effect of the furnace tank support on the inner furnace tank side wall, the column 2 is made of high-temperature resistant material so that the support plate 1 can be reliably supported by the column 2 during operation.

[0050] In one way of stating facts, such as Figure 1 The column 2 is equipped with a sliding rod at its lower end. This sliding rod allows the column 2 to slide against the inner wall of the outer furnace tank, enabling the furnace tank support to move adaptably to the deformation of the inner furnace tank during use, thus effectively preventing deformation. The sliding rod is made of a high-temperature resistant material to ensure reliability under high-temperature conditions.

[0051] In one implementation, such as Figure 2 As shown, rollers are connected to the bottom of column 2. The use of rollers facilitates the relative sliding between the furnace tank support and the inner wall of the outer furnace tank. The rollers are made of high-temperature resistant material to ensure reliability in high-temperature environments.

[0052] The present invention also provides a method of using a furnace support component, the method comprising: Step 1: Based on the actual condition of the inner furnace tank, manufacture the furnace tank support component, and install the furnace tank support component along the length of the inner furnace tank at least at the positions where the inner furnace tank frequently deforms; Step 2: Slowly heat the inner furnace tank; Step 3: Stop heating and wait for the equipment to cool down. Monitor the deformation of the inner furnace tank.

[0053] In one embodiment, the most prone-to-deformation location of the inner furnace tank is its middle section. A furnace tank support member is installed at this location, the width of which is adapted to the deformation range of the inner furnace tank. When the inner furnace tank is long, other furnace tank supports can be placed on both sides of the furnace tank support member at the middle section for auxiliary support, thereby achieving deformation control along the entire length of the inner furnace tank.

[0054] In one embodiment, the inner furnace tank is preheated by low-temperature baking. During pyrolysis, a low-temperature baking process is employed, with strict control over the heating rate and temperature distribution, ensuring the inner furnace tank undergoes a slow and uniform heating process. This effectively avoids the problem of thermal stress concentration. The use of low-temperature baking technology, combined with its coordination with the support device, effectively reduces the deformation of the inner furnace tank.

[0055] The inner furnace is heated slowly, and the specific heating process is as follows: S1. Strictly control the heating rate (usually less than 50% of that of traditional ovens) to avoid thermal stress concentration in the furnace due to excessive local temperature differences; S2. By controlling the temperature in stages, such as from room temperature to 100℃, and then gradually increasing the temperature from 100℃ to 200℃, and maintaining a constant temperature for a period of time after each stage of temperature increase, the furnace can be heated evenly as a whole, reducing deformation caused by uneven expansion. S3. Precisely control the maximum furnace temperature, generally 20%-30% lower than the normal operating temperature of the furnace, allowing the furnace to undergo "gentle preheating" before pyrolysis, reducing the risk of deformation due to thermal shock during formal operation. Low-temperature ovens, through uniform heating, allow for a more gradual thermal expansion of the furnace tank, reducing "sudden deformation" caused by drastic temperature differences at the source. This "pre-adaptation" process results in smaller and more regular deformation of the furnace tank, thus eliminating the need for excessive instantaneous stress on the springs in the tank supports, ensuring their reliability during use and extending their lifespan. Furthermore, during the cooling process of the inner furnace tank, due to the principle of thermal expansion and contraction, the deformation of the inner furnace tank slowly recovers. During this recovery process, the furnace tank supports also recover, continuing to provide reliable support to the inner furnace tank and offsetting the weight of the inner furnace tank's side walls. This allows the inner furnace tank to return to its initial state as much as possible, minimizing deformation.

[0056] After the equipment has cooled down, workers can enter the inner furnace to inspect the deformation of its bottom. Specifically, a straight line is projected inside the inner furnace using a level, and the distance between various points on the bottom of the inner furnace and the line is measured. Typically, the distance is largest in the middle of the inner furnace and smallest at the sides, indicating that the deformation is greatest in the middle. Based on this deformation measurement, a new furnace support component can be fabricated, ensuring a reliable fit with the bottom of the inner furnace.

[0057] After using this furnace tank support component, the deformation inside the inner furnace tank increases slightly each time. Therefore, a new furnace tank support component needs to be manufactured each time based on the actual deformation of the inner furnace tank, so that the support component can fit the bottom of the inner furnace tank and provide reliable support. Typically, the inner furnace tank can still be used when the deformation is between 5-8 cm, but when the deformation reaches 10-15 cm, it may cause the shaftless spiral to break.

[0058] In this embodiment, preferably, the method of use further includes: Step 4: When the shaftless spiral reamer breaks, rotate the inner furnace pot 180° and repeat steps 1-3.

[0059] When the shaftless spiral reamer breaks, the deformation of the inner furnace liner is significant. After the equipment cools down, the inner furnace liner can be rotated 180°, causing the previously concave position to become convex and the previously convex position to become more prominent. Then, based on the actual condition of the inner furnace liner, a new furnace liner support is fabricated, ensuring it still fits snugly against the bottom of the inner furnace liner. The new downward deformation corrects the previous deformation, thus achieving the deformation correction effect and extending the service life of the inner furnace liner.

[0060] In this embodiment, preferably, the temperature rise curve of the inner furnace tank is controlled during the heating process.

[0061] In this embodiment, preferably, in step 2, the inner furnace tank is heated by segmented heating.

[0062] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0063] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0064] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A furnace support component, characterized in that, The furnace tank support includes a support plate (1) and a column (2) for supporting the support plate (1). The support plate (1) is in contact with the surface of the inner furnace tank, and the bottom of the column (2) is slidably connected to the inner wall of the outer furnace tank. The column (2) is elastically connected to the support plate (1) to provide elastic support to the inner furnace tank.

2. The furnace support member according to claim 1, characterized in that, The furnace support also includes a compressible elastic connection structure, the upper end of which is connected to the support guard plate (1) and the lower end of which is connected to the column (2).

3. The furnace support member according to claim 2, characterized in that, The elastic connection structure includes an upper end face (31), a lower end face (32), and a plurality of elastic elements (33) located between the upper end face (31) and the lower end face (32).

4. The furnace support member according to claim 3, characterized in that, The plurality of elastic elements (33) are in a compressed state.

5. The furnace support member according to claim 1, characterized in that, The column (2) is made of high temperature resistant material.

6. A method of using the furnace support member according to any one of claims 1-4, characterized in that, The method of use includes: Step 1: Based on the actual condition of the inner furnace tank, manufacture the furnace tank support component, and install the furnace tank support component at least at the middle position of the inner furnace tank along the length direction of the inner furnace tank; Step 2: Slowly heat the inner furnace tank; Step 3: After stopping heating, wait for the equipment to cool down and monitor the deformation of the inner furnace tank.

7. The method of use according to claim 6, characterized in that, The method of use also includes Step 4: When the shaftless spiral reamer breaks, rotate the inner furnace pot 180° and repeat steps 1-3.

8. The method of use according to claim 6, characterized in that, In step 2, the temperature rise curve of the inner furnace tank is controlled during the heating process.

9. The method of use according to claim 6, characterized in that, In step 2, the inner furnace tank is heated in stages.

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