CN112013689A - Petroleum coke calcining furnace flue and manufacturing method thereof - Google Patents
Petroleum coke calcining furnace flue and manufacturing method thereof Download PDFInfo
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- CN112013689A CN112013689A CN202010860934.8A CN202010860934A CN112013689A CN 112013689 A CN112013689 A CN 112013689A CN 202010860934 A CN202010860934 A CN 202010860934A CN 112013689 A CN112013689 A CN 112013689A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/03—Calcining
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
A petroleum coke calcining furnace flue comprises supporting parts (1) on two sides and an upper top (2) erected above the supporting parts (1) on the two sides, wherein the upper top (2) comprises a plurality of layers of aluminum silicate fiber felts vertically laid with the supporting parts (1), one ends, close to the supporting parts (1), of the two sides of the upper top (2) are provided with notches (5), and the width between the notches (5) on the two sides of the upper top (2) is not more than that between the supporting parts (1) on the two sides; a plurality of reinforcing rods penetrate through gaps (5) on two sides of the upper top (2) along the circulation direction of the flue. The flue of the petroleum coke calcining furnace changes the traditional arched flue into a plane top, and utilizes a plurality of aluminum silicate fiber felt processing products to seal the upper part of the flue, thereby being light, quick, heat-preserving, easy to process and low in cost.
Description
Technical Field
The invention relates to the technical field of petroleum coke calcining furnaces, in particular to a flue of a petroleum coke calcining furnace and a manufacturing method thereof.
Background
A calcining furnace is a thermal equipment for heat treatment of carbon raw materials (such as coke, anthracite and the like) at high temperature to improve the performance of the raw materials. The calcining furnace is used for manufacturing petroleum coke, the flue of the traditional calcining furnace is built by refractory bricks, and the upper top part is arched, which is shown in figure 1. However, in the use process of the flue, the refractory bricks are continuously influenced by high-temperature flue gas in the flue, cracks are easily generated on the surface, and once the cracks are generated, the arch-shaped upper top is easy to collapse.
Aluminum silicate fiber is a substance having low thermal conductivity, excellent thermal and chemical stability, and being free of binder and corrosive. Generally applied to interlayer filling, fiber casting materials, coating materials, vacuum forming product materials and the like of equipment. The product can be made into aluminum silicate fiber board, aluminum silicate fiber felt, aluminum silicate fiber rope, aluminum silicate fiber blanket, etc. through special processing. However, the aluminum silicate fiber product generally cannot be used alone, and needs to be used in combination with other casting materials, for example, in patent No. CN210663972U entitled high temperature resistant flue top plate and high temperature resistant flue, a high temperature resistant flue top plate is provided, an inner layer of the high temperature resistant flue top plate comprises an aluminum silicate limiting plate laid on an inner side of a steel plate and a refractory casting material poured on an inner side of the aluminum silicate limiting plate, a stainless steel mesh is laid in the refractory casting material, hook nails are welded on an inner side surface of the steel plate, and the hook nails penetrate through the stainless steel mesh to be integrally fixed. Although the strength of the top of the flue is increased, the high-temperature-resistant flue top plate is complex in process, an aluminum silicate limiting plate, a stainless steel wire mesh and hook nails need to be made, the cost is high, the weight of the top of the flue is increased due to the use of the steel plate and the refractory castable, and the high-temperature-resistant flue top plate still has certain risks after being used for a long time.
Disclosure of Invention
In order to solve the problems of complex process, cost and weight caused by the fact that the aluminum silicate fiber product cannot be used independently and is matched with other refractory castable, the invention provides the petroleum coke calcining furnace flue, the traditional arched flue is changed into a plane top, and a plurality of aluminum silicate fiber felt processing products are utilized to seal the upper part of the flue, so that the petroleum coke calcining furnace flue is light, quick, heat-preserving, easy to process and low in cost.
The technical scheme of the invention is as follows:
a petroleum coke calcining furnace flue comprises supporting parts on two sides and an upper top erected above the supporting parts on the two sides, wherein the upper top comprises a plurality of layers of aluminum silicate fiber felts vertically paved with the supporting parts, gaps are formed in the two sides of the upper top, which are close to one ends of the supporting parts, and the width between the gaps on the two sides of the upper top is not more than that between the supporting parts on the two sides; and a plurality of reinforcing rods penetrate through the gaps on the two sides of the upper top along the circulation direction of the flue.
The thickness of the upper top of the petroleum coke calcining furnace flue is not less than 30cm, so that the heat preservation performance of the upper top is ensured.
As above petroleum coke calcination furnace flue, the stiffener includes the reinforcing bar, and the reinforcing bar that is close to the breach position is less than 50cm apart from the distance of adjacent collateral branch supporting part to guarantee top both ends intensity.
Furthermore, in view of the fact that the weight of the top of the steel bar made of the aluminum silicate fiber felt is light, the diameter of the steel bar is not too large, and the diameter can be selected from 5mm to 15 mm. Preferably, the diameter of the steel bar is 8-10 mm.
A method for manufacturing the petroleum coke calcining furnace flue comprises the following steps:
the method comprises the following steps: manufacturing an upper top, unfolding an aluminum silicate fiber coiled felt to the total width of a flue of the petroleum coke calcining furnace, inwards folding to the head of the aluminum silicate fiber felt, reversely folding again, and so on, so that the folding height is not less than 0.5 m;
step two: compacting the folded upper top in the step one by using a press machine, and then binding the upper top 2 along the width direction of the aluminum silicate fiber felt by using a binding rope;
step three: cutting gaps at two ends of the upper top compacted in the step two, wherein the distance between the gaps at the two ends is not more than the width between the supporting parts at the two sides, and the size of the gaps is matched with the width of the supporting parts;
step four: inserting a plurality of reinforcing rods between the notches at the two ends of the upper top obtained in the step three, wherein the distance between every two adjacent reinforcing rods is 0.4-0.8 m;
step five: placing the upper top obtained in the fourth step on a supporting part, and lapping notches at two ends of the upper top on the top of the supporting part;
step six: and starting the calcining furnace, allowing high-temperature flue gas to flow between the supporting parts at the two sides and the upper top, burning off the binding ropes, and expanding the aluminum silicate fiber felt between the notches at the two ends of the upper top to the supporting parts at the two sides under heat so as to form a flue tightly connected with the supporting parts.
The other method for manufacturing the petroleum coke calcining furnace flue comprises the following steps:
the method comprises the following steps: manufacturing an upper top, unfolding an aluminum silicate fiber coiled felt with the width larger than the outer width of the supporting parts at the two sides, folding the aluminum silicate fiber coiled felt from back to front by 0.4-0.6 m, folding the aluminum silicate fiber coiled felt in the opposite direction with the same width, and so on, so that the folding height is not less than 0.5 m;
step two: compacting the folded upper top in the step one by using a press machine, and then binding the upper top 2 along the width direction of the aluminum silicate fiber felt by using a binding rope;
step three: cutting gaps at two ends of the upper top compacted in the step two, wherein the distance between the gaps at the two ends is not more than the width between the supporting parts at the two sides, and the size of the gaps is matched with the width of the supporting parts;
step four: inserting a plurality of reinforcing rods between the notches at the two ends of the upper top obtained in the step three, wherein the distance between every two adjacent reinforcing rods is 0.4-0.8 m;
step five: placing the upper top obtained in the fourth step on a supporting part, and lapping notches at two ends of the upper top on the top of the supporting part;
step six: and starting the calcining furnace, allowing high-temperature flue gas to flow between the supporting parts at the two sides and the upper top, burning off the binding ropes, and expanding the aluminum silicate fiber felt between the notches at the two ends of the upper top to the supporting parts at the two sides under heat so as to form a flue tightly connected with the supporting parts.
According to the manufacturing method of the petroleum coke calcining furnace flue, the folding height in the first step is 0.5-0.8 m. In the second step, the pressure of the press is 0.5-0.8 MPa, and the top thickness of the compacted material can be controlled to be 0.3-0.5 m. The thickness can ensure that the upper top has enough heat preservation performance.
According to the manufacturing method of the petroleum coke calcining furnace flue, the notch is rectangular, so that the cutting is convenient. The distance between the reinforcing rod and the adjacent side notch is larger than 0.2 m.
The invention has the beneficial effects that the traditional arched flue of the petroleum coke calcining furnace is changed into the plane top, and the upper part of the flue is sealed by utilizing a plurality of aluminum silicate fiber felt processing products, so that compared with the arched flue built by traditional refractory bricks, the flue of the petroleum coke calcining furnace is lighter, more rapid, more heat-insulating, easier to process and lower in cost. The connecting strength between adjacent upper tops can be enhanced through the reinforcing rods penetrating through the upper tops, and the upper tops can be firmly attached to the supporting parts at two sides by utilizing the thermal expansion performance of the aluminum silicate fiber felt.
Drawings
The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
In the drawings:
FIG. 1 is a structural view of a flue of a conventional calciner;
FIG. 2 is a sectional view of a flue of the petroleum coke calcination furnace of the embodiment 1;
FIG. 3 is a schematic structural view of the top of the flue in this embodiment 1;
the components represented by the reference numerals in the figures are:
1. support portion, 2, top, 3, reinforcing bar, 4, tie rope, 5, breach.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It should be noted that these embodiments are provided so that this disclosure can be more completely understood and fully conveyed to those skilled in the art, and the present disclosure may be implemented in various forms without being limited to the embodiments set forth herein.
Example 1
Referring to fig. 2, fig. 2 is a cross-sectional view of a flue of the petroleum coke calcining furnace of the embodiment, which includes supporting portions 1 at two sides and an upper top 2 erected above the supporting portions 1 at two sides, the supporting portions 1 are built by refractory bricks, the upper top 2 above the supporting portions includes a plurality of layers of aluminum silicate fiber felts laid vertically to the supporting portions 1, and the aluminum silicate fiber felts are formed by folding a whole strip instead of stacking a plurality of aluminum silicate fiber felts. Compared with a plurality of laminated aluminum silicate fiber felts, the whole folded aluminum silicate fiber felt has higher strength and longer service life. Preferably, the thickness of the selected aluminum silicate fiber felt is less than 30mm, so that the aluminum silicate fiber felt is convenient to fold.
Furthermore, gaps 5 are formed in the two sides of the upper top 2 and close to one end of the supporting portion 1, and the width between the gaps 5 in the two sides of the upper top 2 is slightly smaller than that between the supporting portions 1 in the two sides, so that the upper top 2 can be conveniently installed. After the upper top 2 is installed, under the action of high-temperature flue gas in the flue, the aluminum silicate fiber felt in the upper top 2 generates a thermal expansion reaction and is tightly attached to the supporting parts 1 on the two sides.
Preferably, the thickness of the upper top 2 is 0.3-0.5 m, so that the heat insulation performance of the upper top 2 is ensured.
In this embodiment, three reinforcing bars 3 are further penetrated between the notches 5 at the two sides of the upper top 2 along the circulation direction of the flue. Wherein, the middle reinforcing steel bar 3 is positioned in the middle of the upper top 2, and the other two reinforcing steel bars 3 are symmetrically arranged at two sides of the upper top 2 relative to the middle reinforcing steel bar 3.
Further, the distance between the steel bar 3 close to the notch 5 and the adjacent side supporting part 1 is less than 50cm, so that the strength of the two ends of the upper top 2 is ensured. Because the weight of the upper top 2 made of the single aluminum silicate fiber felt is light, the diameter of the reinforcing steel bar 3 is not suitable to be too thick and can be selected from 5-15 mm. Preferably, the diameter of the steel bar 3 is 8-10 mm.
Referring to fig. 3, a method for manufacturing the flue of the petroleum coke calcining furnace comprises the following steps:
the method comprises the following steps: manufacturing the upper top 2, unfolding an aluminum silicate fiber felt with the width of about 0.6m to the total width of a flue of the petroleum coke calcining furnace, folding the aluminum silicate fiber felt inwards to the head of the aluminum silicate fiber felt along the direction vertical to the supporting part 1, reversely folding the aluminum silicate fiber felt again, and so on to enable the folding height to reach 0.7m, and manufacturing a plurality of groups of upper tops 2 by adopting the same method;
step two: adjusting the pressure of the press machine to 0.8MPa, compacting the folded upper top 2 in the step I, wherein the height of the compacted upper top 2 is about 0.5m, and then binding the upper top 2 along the width direction of the aluminum silicate fiber felt by using a binding rope 4;
step three: and (3) cutting square notches 5 at two ends of the compacted upper top 2 obtained in the step two by using a saw, wherein the height of each notch 5 is 0.35m, and the width of each notch is matched with the width of the support part 1. The distance between the notches 5 at the two ends is not more than the width between the supporting parts 1 at the two sides;
step four: inserting three steel bars 3 with the thickness of 10mm into the middle parts of the notches 5 at the two ends of the upper top 2 obtained in the step three, wherein the distance between the adjacent steel bars 3 is 0.4-0.8 m, so as to ensure that the distance between the steel bars 3 at the two ends and the adjacent side supporting part 1 is 0.2-0.5 m, and the three steel bars 3 at least penetrate through the two groups of upper tops 2 to fix the adjacent upper tops 2 together;
step five: placing the upper top 2 obtained in the fourth step on the supporting part 1, and lapping the notches 5 at the two ends on the top of the supporting part 1;
step six: and starting the calcining furnace, allowing high-temperature flue gas to flow between the supporting parts 1 at the two sides and the upper top 2, burning off the binding ropes 4, and expanding the aluminum silicate fiber felts between the notches 5 at the two ends of the upper top 2 to the supporting parts 1 at the two sides under heat, so as to form a flue tightly connected with the supporting parts 1.
Example 2
The other method for manufacturing the petroleum coke calcining furnace flue comprises the following steps:
the method comprises the following steps: manufacturing the upper top 2, unfolding an aluminum silicate fiber coiled felt with the width larger than the outer width of the supporting parts 1 at two sides, folding the aluminum silicate fiber coiled felt from back to front by 0.5m, folding the aluminum silicate fiber coiled felt in the opposite direction with the same width, and so on to enable the folding height to reach 0.5m, and then manufacturing a plurality of groups of upper tops 2 by adopting the same method;
step two: adjusting the pressure of the press machine to 0.5MPa, compacting the folded upper top 2 in the step I, wherein the height of the compacted upper top 2 is about 0.3m, and then binding the upper top 2 along the width direction of the aluminum silicate fiber felt by using a binding rope 4;
step three: and (3) cutting square notches 5 at two ends of the compacted upper top 2 obtained in the step two by using a saw, wherein the height of each notch 5 is 0.2m, and the width of each notch is matched with the width of the support part 1. The distance between the notches 5 at the two ends is not more than the width between the supporting parts 1 at the two sides;
step four: inserting three steel bars 3 with the thickness of 8mm into the middle parts of the notches 5 at the two ends of the upper top 2 obtained in the step three, wherein the distance between the adjacent steel bars 3 is 0.4-0.8 m, so as to ensure that the distance between the steel bars 3 at the two ends and the adjacent side supporting part 1 is 0.2-0.5 m, and the three steel bars 3 at least penetrate through the two groups of upper tops 2 to fix the adjacent upper tops 2 together;
step five: placing the upper top 2 obtained in the fourth step on the supporting part 1, and lapping the notches 5 at the two ends on the top of the supporting part 1;
step six: and starting the calcining furnace, allowing high-temperature flue gas to flow between the supporting parts 1 at the two sides and the upper top 2, burning off the binding ropes 4, and expanding the aluminum silicate fiber felts between the notches 5 at the two ends of the upper top 2 to the supporting parts 1 at the two sides under heat, so as to form a flue tightly connected with the supporting parts 1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or additions or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The petroleum coke calcining furnace flue is characterized by comprising supporting parts (1) on two sides and an upper top (2) erected above the supporting parts (1) on the two sides, wherein the upper top (2) comprises a plurality of layers of aluminum silicate fiber felts vertically laid with the supporting parts (1), one ends, close to the supporting parts (1), of the two sides of the upper top (2) are provided with notches (5), and the width between the notches (5) on the two sides of the upper top (2) is not more than that between the supporting parts (1) on the two sides; a plurality of reinforcing rods penetrate through gaps (5) on two sides of the upper top (2) along the circulation direction of the flue.
2. A petroleum coke calcination furnace flue according to claim 1, characterized in that the thickness of the upper ceiling (2) is not less than 30 cm.
3. A petroleum coke calcination furnace flue as claimed in claim 1, wherein the reinforcement bars comprise reinforcing bars (3), and the reinforcing bars (3) near the notches (5) are less than 50cm from the adjacent side supports (1).
4. The petroleum coke calcining furnace flue as claimed in claim 3, characterized in that the diameter of the steel bar (3) is between 5 and 15 mm.
5. The petroleum coke calcining furnace flue as claimed in claim 4, characterized in that the diameter of the steel bar (3) is between 8 and 10 mm.
6. A method for manufacturing a flue of a petroleum coke calcining furnace as claimed in claim 1, which is characterized by comprising the following steps:
the method comprises the following steps: manufacturing an upper top (2), unfolding an aluminum silicate fiber felt to the total width of a flue of the petroleum coke calcining furnace, inwards folding to the head of the aluminum silicate fiber felt, reversely folding again, and so on, so that the folding height is not less than 0.5 m;
step two: compacting the upper top (2) folded in the step one by using a press machine, and then binding the upper top (2) along the width direction of the aluminum silicate fiber felt by using a binding rope (4);
step three: cutting gaps (5) at two ends of the compacted upper top (2) obtained in the step two, wherein the distance between the gaps (5) at the two ends is not more than the width between the supporting parts (1) at two sides, and the size of the gap (5) is matched with the width of the supporting part (1);
step four: inserting a plurality of reinforcing rods between the notches (5) at the two ends of the upper top (2) obtained in the step three, wherein the distance between every two adjacent reinforcing rods is 0.4-0.8 m;
step five: placing the upper top (2) obtained in the fourth step on the supporting part (1), and overlapping notches (5) at two ends of the upper top on the top of the supporting part (1);
step six: the calcining furnace is started, high-temperature flue gas flows through the space between the supporting parts (1) at the two sides and the upper top (2), the binding ropes (4) are burnt off, and the aluminum silicate fiber felts between the gaps (5) at the two ends of the upper top (2) are expanded to the supporting parts (1) at the two sides when heated, so that a flue tightly connected with the supporting parts (1) is formed.
7. A method for manufacturing a flue of a petroleum coke calcining furnace as claimed in claim 1, which is characterized by comprising the following steps:
the method comprises the following steps: manufacturing an upper top (2), unfolding an aluminum silicate fiber coiled felt with the width larger than the outer width of the supporting parts (1) at two sides, folding the aluminum silicate fiber coiled felt from back to front by 0.4-0.6 m, folding the aluminum silicate fiber coiled felt in the opposite direction with the same width, and so on, so that the folding height is not less than 0.5 m;
step two: compacting the upper top (2) folded in the step one by using a press machine, and then binding the upper top (2) along the width direction of the aluminum silicate fiber felt by using a binding rope (4);
step three: cutting gaps (5) at two ends of the compacted upper top (2) obtained in the step two, wherein the distance between the gaps (5) at the two ends is not more than the width between the supporting parts (1) at two sides, and the size of the gap (5) is matched with the width of the supporting part (1);
step four: inserting a plurality of reinforcing rods between the notches (5) at the two ends of the upper top (2) obtained in the step three, wherein the distance between every two adjacent reinforcing rods is 0.4-0.8 m;
step five: placing the upper top (2) obtained in the fourth step on the supporting part (1), and overlapping notches (5) at two ends of the upper top on the top of the supporting part (1);
step six: the calcining furnace is started, high-temperature flue gas flows through the space between the supporting parts (1) at the two sides and the upper top (2), the binding ropes (4) are burnt off, and the aluminum silicate fiber felts between the gaps (5) at the two ends of the upper top (2) are expanded to the supporting parts (1) at the two sides when heated, so that a flue tightly connected with the supporting parts (1) is formed.
8. The method for manufacturing the petroleum coke calcining furnace flue as claimed in claim 6 or 7, wherein the folding height in the first step is between 0.5 and 0.8 m.
9. The method for manufacturing the petroleum coke calcining furnace flue as claimed in claim 8, wherein in the second step, the pressure of the press is between 0.5 and 0.8MPa, and the thickness of the compacted top (2) is between 0.3 and 0.5 m.
10. A method for making a petroleum coke calcination furnace flue according to claim 6 or 7, characterized in that the shape of the notch (5) comprises a rectangle, and the distance between the reinforcing rod and the adjacent side notch (5) is more than 0.2 m.
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