CN215627777U - Dry quenching furnace with double-supporting-leg structure - Google Patents
Dry quenching furnace with double-supporting-leg structure Download PDFInfo
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- CN215627777U CN215627777U CN202022746421.2U CN202022746421U CN215627777U CN 215627777 U CN215627777 U CN 215627777U CN 202022746421 U CN202022746421 U CN 202022746421U CN 215627777 U CN215627777 U CN 215627777U
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Abstract
The utility model relates to a dry quenching furnace with a double-supporting-leg structure, and belongs to the technical field of dry quenching energy conservation and environmental protection in the metallurgical industry. The technical scheme is as follows: a plurality of upper supporting legs (11) for supporting the annular air passage (6) are arranged at the bottom of the annular air passage (6) along the circumferential direction of the dry quenching furnace, a circulating gas chute is formed between every two adjacent upper supporting legs (11), the cross section of each upper supporting leg (11) is in a right trapezoid shape, the right-angle edge of each upper supporting leg (11) is embedded with the inner wall (9) of the annular air passage, and an expansion joint (12) is arranged between the bottom edge of each upper supporting leg (11) and the outer wall (10) of the annular air passage; a lower supporting leg (14) is arranged below the upper supporting leg (11), and a sliding layer (13) is arranged between the upper supporting leg (11) and the lower supporting leg (14). The utility model has the beneficial effects that: the structural stability of the dry quenching furnace is greatly improved, the service life of the dry quenching furnace is prolonged, and the long-period, efficient and stable production of the dry quenching furnace is promoted.
Description
Technical Field
The utility model relates to a dry quenching furnace with a double-supporting-leg structure, and belongs to the technical field of dry quenching energy conservation and environmental protection in the metallurgical industry.
Background
The popularization of the dry quenching technology is still in the development stage in China, referring to the attached figure 1, the dry quenching furnace is of a circular cross section vertical groove body structure and mainly comprises a prestoring chamber, a chute area, a cooling chamber and the like. The upper part of the dry quenching furnace is a pre-storage chamber, the middle part is a chute area, and the lower part is a cooling chamber. The pre-storage chamber is used for receiving the intermittently loaded red coke, has a buffer function and can compensate production fluctuation; in the cooling chamber, coke and low-temperature circulating flue gas carry out reverse heat exchange, the chute area is positioned between the pre-storage chamber and the cooling chamber, 30 support legs with equal distance are arranged along the circumferential direction of the dry quenching furnace and used for supporting the annular airway masonry at the upper part of the dry quenching furnace, a circulating gas chute is formed between every two adjacent support legs, and 30 chutes are formed to form the chute area. The coke which is hot at about 1000 ℃ is loaded from a furnace mouth, the coke moves from top to bottom and sequentially passes through a pre-storage chamber, a chute area and a cooling chamber, low-temperature circulating gas enters the dry quenching furnace from an air supply device at the bottom of the dry quenching furnace, flows upwards to enter the cooling chamber, carries out countercurrent heat exchange with the coke in the cooling chamber, and is cooled to below 200 ℃ and discharged from the bottom of the dry quenching furnace; the temperature of the circulating gas after absorbing the sensible heat of the coke is raised to 900-960 ℃, the circulating gas flows upwards through a chute area, a 0 DEG/180 DEG partition wall divides an annular gas passage into two parts along the circumferential direction, the flue gas is divided into two parts in the annular gas passage, the two parts are converged to an outlet of a dry quenching furnace and flows out of the dry quenching furnace, the flue gas enters a boiler to exchange heat with water in the boiler to generate superheated steam for power generation, the temperature of the circulating gas after exchanging heat with the boiler is reduced to below 130 ℃, and the circulating gas is blown into the dry quenching furnace again by a circulating fan for recycling.
The pre-storage chamber of the dry quenching furnace is divided into an upper part, a middle part and a lower part, wherein the upper part is a cone top area, the middle part is a straight-section solid refractory masonry, the lower part is an annular air passage, and the annular air passage is formed by an inner wall and an outer wall to form the annular masonry.
In the production process, the inner wall of the annular air flue of the dry quenching furnace is easy to damage, the service life is short, the shortest service life is seven months after annual repair, and the environmental protection, cleanness, stability and high-efficiency operation of the dry quenching furnace are seriously restricted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dry quenching furnace with a double-supporting-leg structure, which can prolong the service life of the dry quenching furnace, promote long-period, efficient and stable production of dry quenching and solve the problems in the background technology.
The technical scheme of the utility model is as follows:
a dry quenching furnace with a double-supporting-leg structure is of a circular-section vertical structure and comprises a pre-storage chamber, a chute area and a cooling chamber, wherein the pre-storage chamber is arranged at the upper part of the dry quenching furnace, the chute area is arranged in the middle of the dry quenching furnace, and the cooling chamber is arranged at the lower part of the dry quenching furnace; the pre-storage chamber is divided into an upper part, a middle part and a lower part, wherein the upper part is a cone top area, the middle part is a straight-section solid refractory masonry, the lower part is an annular air passage, the annular air passage is an annular masonry formed by an annular air passage inner wall and an annular air passage outer wall, a partition wall is arranged in the annular air passage, a plurality of upper supporting legs for supporting the annular air passage are arranged at the bottom of the annular air passage along the circumferential direction of the dry quenching furnace, a circulating gas chute is formed between every two adjacent upper supporting legs, the cross section of each upper supporting leg is in a right trapezoid shape, the right-angle edge of each upper supporting leg is embedded with the annular air passage inner wall, and an expansion joint is arranged between the bottom edge of each upper supporting leg and the annular air passage outer wall; and a lower supporting leg is arranged below the upper supporting leg, and a sliding layer is arranged between the upper supporting leg and the lower supporting leg.
And an expansion gap between the bottom edge of the upper supporting leg and the outer wall of the annular air passage is 8 mm.
The sliding layer between the upper supporting leg and the lower supporting leg is a layer of oiled paper paved between the upper supporting leg and the lower supporting leg.
The upper support leg is positioned between the annular air flue inner wall and the annular air flue outer wall.
By adopting the utility model, the upper supporting leg and the lower supporting leg form a double-supporting leg structure of the dry quenching furnace, the upper supporting leg and the inner wall of the annular air passage synchronously expand and contract during the heating and cooling of the dry quenching furnace, during normal production, the lower supporting leg bears the refractory material gravity load from the inner wall of the annular air passage and the downward impact component force during coke charging, and the upper supporting leg resists the pressure difference from the inside and the outside of the annular air passage and the outward impact component force during coke charging, so that the inner wall of the annular air passage is uniformly stressed in the circumferential direction, the structure is stable, the annular air passage has strong external force impact resistance and more stable operation.
The utility model has the beneficial effects that: the structural stability of the dry quenching furnace is greatly improved, the service life of the dry quenching furnace is prolonged, and the long-period, efficient and stable production of the dry quenching furnace is promoted.
Drawings
FIG. 1 is a schematic view of a dry quenching furnace in the prior art;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a front view of the upper leg of the present invention;
FIG. 4 is a top plan view of the upper leg of the present invention;
FIG. 5 is a schematic view of the flue gas flow direction of the present invention;
FIG. 6 is a top view of a single chute of the present invention;
FIG. 7 is a top view of a chute of the present invention;
in the figure: the dry quenching furnace comprises a furnace mouth 1, a pre-storage chamber 2, a chute area 3, a cooling chamber 4, an air supply device 5, an annular air flue 6, a partition wall 7, an outlet 8, an annular air flue inner wall 9, an annular air flue outer wall 10, an upper supporting leg 11, an expansion joint 12, a sliding layer 13, a lower supporting leg 14 and a dry quenching furnace center line k.
Detailed Description
The utility model is further illustrated by way of example in the following with reference to the accompanying drawings.
Referring to the attached figures 2-7, the coke dry quenching furnace with a double-leg structure is of a circular cross-section vertical structure and comprises a pre-storage chamber 2, a chute area 3 and a cooling chamber 4, wherein the pre-storage chamber 2 is arranged at the upper part of the coke dry quenching furnace, the chute area 3 is arranged in the middle of the coke dry quenching furnace, and the cooling chamber 4 is arranged at the lower part of the coke dry quenching furnace; the pre-storage chamber 2 is divided into an upper part, a middle part and a lower part, the upper part is a cone top area, the middle part is a straight-section solid refractory brickwork, the lower part is an annular air passage 6, the annular air passage 6 is an annular brickwork consisting of an annular air passage inner wall 9 and an annular air passage outer wall 10, a partition wall 7 is arranged in the annular air passage 6, a plurality of upper supporting legs 11 for supporting the annular air passage 6 are arranged at the bottom of the annular air passage 6 along the circumferential direction of the dry quenching furnace, a circulating gas chute is formed between every two adjacent upper supporting legs 11, the cross section of each upper supporting leg 11 is in a right trapezoid shape, the right-angle side of each upper supporting leg 11 is embedded with the annular air passage inner wall 9, and an expansion joint 12 is arranged between the bottom side of each upper supporting leg 11 and the annular air passage outer wall 10; a lower leg 14 is arranged below the upper leg 11, and a sliding layer 13 is arranged between the upper leg 11 and the lower leg 14.
In this embodiment, referring to fig. 2-4, the upper leg 11 of the dry quenching furnace is located between the inner wall and the outer wall of the circular flue of the chute area 3 of the dry quenching furnace and above the lower leg 14 of the dry quenching furnace, and is shaped like a right trapezoid, one end (long side) of the upper leg is embedded in the inner wall 9 of the circular flue to be integrally built, the other end of the upper leg is connected with the outer wall 10 of the circular flue, an expansion joint 12 is reserved, the right-angled waist is located above the lower leg 14, and a sliding layer 13 is arranged between the upper leg and the lower leg, i.e. a layer of oil paper is laid.
Referring to fig. 3 and 4, k is the center line of the coke dry quenching furnace, the upper leg 11 and the lower leg 14: a 1150mm, b 150mm, h 1000mm, r 45 °.
D 1-230 mm and d 2-250 mm of the upper leg 11; the lower leg 14 has a d1 of 290mm and a d2 of 330 mm. The double-leg combination is adopted, so that the structure is stable, and the resistance strength is high.
The upper support leg is reduced in width radially inwards along the lower support leg, the gas channel is enlarged upwards along the inclined channel, and the flow direction of the circulating gas is unchanged.
Composition and physical and chemical properties of refractory material for upper support leg
Physical and chemical properties of asphalt oil paper
The sliding layer of the structure has good sliding property, and the upper support 11 and the inner wall synchronously stretch and retract
Referring to attached figures 2-7, 30 upper supporting legs 11 are designed along the circumferential direction of the annular flue, so that the capacity of the inner wall of the annular flue for resisting external force along the circumferential direction is enhanced, the operation is balanced and stable, the service life of the dry quenching furnace is prolonged by more than 2.5 times, and the benefit value is huge.
Claims (4)
1. A dry quenching furnace with a double-supporting-leg structure is of a circular-section vertical structure and comprises a pre-storage chamber (2), a chute area (3) and a cooling chamber (4), wherein the pre-storage chamber (2) is arranged at the upper part of the dry quenching furnace, the chute area (3) is arranged in the middle of the dry quenching furnace, and the cooling chamber (4) is arranged at the lower part of the dry quenching furnace; prestorage room (2) divide into upper, middle and lower triplex, and upper portion is the vertex of a cone district, and the middle part is straight section entity refractory brickwork, and the lower part is annular air flue (6), annular air flue (6) are the annular brickwork of constituteing by annular air flue interior wall (9) and annular air flue outer wall (10), are equipped with partition wall (7), its characterized in that in annular air flue (6): a plurality of upper supporting legs (11) for supporting the annular air passage (6) are arranged at the bottom of the annular air passage (6) along the circumferential direction of the dry quenching furnace, a circulating gas chute is formed between every two adjacent upper supporting legs (11), the cross section of each upper supporting leg (11) is in a right trapezoid shape, the right-angle edge of each upper supporting leg (11) is embedded with the inner wall (9) of the annular air passage, and an expansion joint (12) is arranged between the bottom edge of each upper supporting leg (11) and the outer wall (10) of the annular air passage; a lower supporting leg (14) is arranged below the upper supporting leg (11), and a sliding layer (13) is arranged between the upper supporting leg (11) and the lower supporting leg (14).
2. The dry quenching furnace with a double-leg structure as claimed in claim 1, wherein: and an expansion gap (12) between the bottom edge of the upper supporting leg (11) and the outer wall (10) of the annular air passage is 8 mm.
3. The dry quenching furnace with a double-leg structure as claimed in claim 1, wherein: the sliding layer (13) between the upper supporting leg (11) and the lower supporting leg (14) is a layer of oilpaper which is paved between the upper supporting leg (11) and the lower supporting leg (14).
4. The dry quenching furnace with a double-leg structure as claimed in claim 1, wherein: the upper supporting leg (11) is positioned between the annular air flue inner wall (9) and the annular air flue outer wall (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022746421.2U CN215627777U (en) | 2020-11-24 | 2020-11-24 | Dry quenching furnace with double-supporting-leg structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022746421.2U CN215627777U (en) | 2020-11-24 | 2020-11-24 | Dry quenching furnace with double-supporting-leg structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215627777U true CN215627777U (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022746421.2U Active CN215627777U (en) | 2020-11-24 | 2020-11-24 | Dry quenching furnace with double-supporting-leg structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215627777U (en) |
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2020
- 2020-11-24 CN CN202022746421.2U patent/CN215627777U/en active Active
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