Carbon calcining furnace

Abstract

The utility model relates to a carbon calcinator relates to petroleum coke calcination technical field, including setting up in carbon calcinator hearth a plurality of row material tank, each material tank upper portion sets up and hearth is linked with the volatile part escape exit, the air inlet that is equipped with with hearth top is linked with hearth inside, is equipped with the flue gas inlet that a plurality of with hearth is linked with in the flue gas inlet top of flue gas collection flue of flue gas collection flue in hearth bottom, flue gas collection flue flue gas collection flue export of flue gas collection flue extends to hearth outside. Through make the volatile part export of material tank directly with hearth link to each other, make volatile part in hearth fully combustion produce high temperature flue gas, finally by setting up in hearth bottom flue gas collection flue discharge, comprehensive utilization flue gas heat makes the material in material tank reach calcination temperature, makes heat transfer guide efficiency higher, temperature distribution is more uniform.

Description

Technical Field

[0001] This invention relates to the field of petroleum coke calcination technology, and more particularly to a carbon calcination furnace. Background Technology

[0002] Currently, the main equipment used for petroleum coke calcination in China is the carbon calcining furnace. This type of furnace structure relies on the material's own gravity for feeding and achieves indirect heating. The furnace has low material loss, can achieve completely fuel-free calcination, and the high-temperature waste gas can be recovered and reused. It requires less initial investment, has low production costs, and a long furnace life.

[0003] Traditional calcining furnaces employ a multi-layered reciprocating flue structure, with each feed tank corresponding to one flue. Volatile matter escapes from the furnace top, flows down through masonry channels into the reciprocating flues for combustion, and the resulting flue gas is discharged through a central flue. This reciprocating flue structure is complex, difficult to construct, results in significant flue gas resistance losses, has a complex furnace structure, is costly, and is difficult to maintain. Each flue is independent and controlled separately, requiring numerous temperature and pressure sensors, leading to a complex control system with a high probability of error. Summary of the Invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a carbon calcining furnace, which connects the volatile matter outlet of the material tank directly to the furnace chamber, so that the volatile matter is fully combusted in the furnace chamber to generate high-temperature flue gas, which is finally discharged through the collection flue located at the bottom of the furnace chamber. The heat of the flue gas is comprehensively utilized to enable the material in the material tank to reach the calcination temperature, resulting in higher heat transfer efficiency and more uniform temperature distribution.

[0005] To achieve the above objectives, the main technical solutions adopted by the present invention include: A carbon calcining furnace includes several discharge tanks disposed within the furnace chamber. Each tank has a volatile matter outlet at its upper part connected to the furnace chamber. An air inlet connected to the interior of the furnace chamber is located above the furnace chamber. A converging flue is located at the bottom of the furnace chamber, and several converging flue gas inlets connected to the furnace chamber are located at the top of the converging flue. The converging flue outlet extends to the outside of the furnace chamber. During production, volatile matter in the tanks enters the furnace chamber through the volatile matter outlet at the upper part of the tanks, mixes with air entering from the air inlet, and burns to generate high-temperature flue gas. Under negative pressure, the high-temperature flue gas enters the converging flue through the converging flue gas inlet and is discharged through the converging flue outlet.

[0006] Furthermore, the horizontal or vertical arrangement of the flue is summarized.

[0007] Furthermore, the total length of the flue inside the furnace is greater than or equal to 80% of the furnace length or width, in order to better exhaust the flue gas inside the furnace.

[0008] Furthermore, when the converging flue is set vertically, several material tanks in each row are set horizontally in a row, and the converging flue is set vertically between the material tanks.

[0009] Furthermore, the flue is located at the bottom of the tank-pulling bricks between several tanks in each row.

[0010] Furthermore, the flue gas inlet of the combined flue is set to correspond to the position of each row of material tanks.

[0011] Furthermore, when the converging flue is arranged horizontally, the converging flue is located in the middle of the furnace.

[0012] Furthermore, several air inlets are provided, corresponding to positions between several feed tanks and between the feed tanks and the inner wall of the furnace, so that the flue gas can burn better between the feed tanks.

[0013] The beneficial effects of this invention are: This invention eliminates the original flue structure, completing the combustion and heat transfer of volatiles within a large furnace. By directly connecting the volatiles outlet of the feed tank to the furnace, the volatiles are fully combusted within the furnace to generate high-temperature flue gas, which is then discharged through a collection flue located at the bottom of the furnace. This comprehensive utilization of flue gas heat ensures the material in the feed tank reaches the calcination temperature, resulting in higher heat transfer efficiency and more uniform temperature distribution. The furnace structure and operation of this invention are simpler, leading to lower initial investment costs. Attached Figure Description

[0014] Figure 1 This is a top view schematic diagram of the carbon calcining furnace of the present invention; Figure 2 for Figure 1 A cross-sectional view at point AA; Figure 3 for Figure 1 A cross-sectional view at point BB; Figure 4 for Figure 1 A cross-sectional view at point CC.

[0015] In the diagram: 1. Outer wall; 2. Furnace chamber; 3. Inner lining; 4. Material tank; 5. Material tank area; 6. Tank brickwork; 7. Material; 8. Volatile matter outlet; 9. Air inlet; 10. Feeding port; 11. Material tank cleaning port; 12. Central flue; 13. Central flue gas inlet; 14. Central flue gas outlet; 15. Material tank discharge port; 16. Support base plate. Detailed Implementation

[0016] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like Figure 1-4 As shown, the present invention provides a carbon calcining furnace, including a plurality of discharge tanks 4 disposed in the furnace chamber 2 of the carbon calcining furnace. A volatile matter outlet 8 disposed on the upper part of each tank 4 is connected to the furnace chamber 2. An air inlet 9 disposed on the upper part of the furnace chamber 2 is connected to the interior of the furnace chamber 2. A collection flue 12 is disposed at the bottom of the furnace chamber 2. A plurality of collection flue gas inlets 13 disposed on the top of the collection flue 12 are connected to the furnace chamber 2. The collection flue outlet 14 of the collection flue 12 extends to the outside of the furnace chamber 2. During production, the volatile matter in the tank 4 enters the interior of the furnace chamber 2 through the volatile matter outlet 8 at the upper part of the tank 4, mixes with the air entering from the air inlet 9 and burns to generate high-temperature flue gas. Under the action of negative pressure, the high-temperature flue gas enters the collection flue 12 through the collection flue gas inlets 13 and is discharged through the collection flue outlet 14.

[0018] Specifically, the carbon calcining furnace has an outer wall 1 on the outside and an inner lining 3 on the inside. The inner lining 3 is mainly made of lightweight insulation material. The carbon calcining furnace has a furnace chamber 2 inside. Several material tanks 4 are provided inside the furnace chamber 2. Several material tanks 4 are set in each row. Each material tank 4 has a discharge port 10 at the top center and material tank cleaning ports 11 on both sides. A volatile matter outlet 8 is provided above each material tank 4. The volatile matter outlet 8 directly connects the material tank area 5 to the furnace chamber 2. Each material tank 4 has a material tank discharge port 15 at the bottom. The bottom of the carbon calcining furnace is provided with a supporting base plate 16. Inter-tank bricks 6 are provided between the material tanks 4.

[0019] Specifically, the flue 12 is arranged horizontally or vertically; more specifically, the length of the flue 12 inside the furnace 2 is greater than or equal to 80% of the length or width of the furnace 2, so as to better discharge the flue gas inside the furnace.

[0020] When the converging flue 12 is arranged longitudinally, several material tanks 4 in each row are arranged laterally in a row, and the converging flue 12 is arranged vertically between the material tanks 4. Specifically, the converging flue 12 is located at the bottom of the tank-to-tank brick 6 between several material tanks 4 in each row, and the flue gas inlet 13 of the converging flue 12 is set in a position corresponding to the material tanks 4 in each row.

[0021] When the converging flue 12 is arranged horizontally, the converging flue 12 is located in the middle of the furnace 2.

[0022] Specifically, several air inlets 9 are provided, which are respectively located between several material discharge tanks 4 and between the material tanks 4 and the inner wall of the furnace 2, so that the flue gas can be better burned between the material tanks.

[0023] During production, material 7 enters the material zone 5 of the material tank from the discharge port 10. Under the action of gravity, it slowly moves downward from top to bottom. During the downward movement and heating process, the volatiles generated in material 7 enter the furnace 2 from the volatiles outlet 8 at the top of the material tank 4. They mix with the cold air entering from the air inlet 9 and burn to produce high-temperature flue gas. Under the action of negative pressure, the flue gas also enters the total flue gas inlet 13 at the bottom from top to bottom into the total flue gas 12. Finally, it is discharged from the flue gas outlet 14 and enters the subsequent waste heat utilization process.

[0024] During the downward movement of the high-temperature flue gas within furnace 2, heat is conducted from the flue gas to the wall of the material tank 4 through high-temperature radiation and convection, and then transferred from the tank wall to the center of the material through thermal conduction, ultimately raising the material to the final calcination temperature of 1200℃. At this temperature, the material's crystal lattice undergoes physical and chemical transformations, ultimately achieving the required physicochemical properties and completing the entire heating process. The calcined finished material then enters the subsequent cooling stage through discharge port 15.

[0025] Under the premise of a fixed discharge volume, the amount of volatiles released per unit time is theoretically also fixed. The furnace temperature and pressure levels can be controlled by adjusting the gate at the main outlet of the flue and the air regulating valve at the air inlet of the furnace body, thereby achieving the ideal temperature and pressure distribution during the material heating process.

[0026] This invention heats raw materials using gravity feeding and indirect heat transfer to achieve the specified post-calcination indicators and maximize material yield. The furnace structure of this invention facilitates various operations such as furnace inspection, temperature adjustment, temperature and pressure control, and cleaning. Simultaneously, the number of furnace accessories (inspection holes, temperature control doors, cleaning doors, air conditioning doors, etc.) is significantly reduced. Compared to the complex furnace structure and cumbersome production operations of traditional calcining furnaces, the furnace structure and design concept of this invention are simpler, more feasible, and scientifically sound.

[0027] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any modifications, alterations, substitutions, and variations made by those skilled in the art to the above embodiments are within the scope of the present invention.

Claims

1. A carbon calcining furnace, comprising a plurality of discharge tanks (4) disposed within the furnace chamber (2) of the carbon calcining furnace, characterized in that, Each material tank (4) has a volatile matter outlet (8) at the top that is connected to the furnace (2). The furnace (2) has an air inlet (9) at the top that is connected to the interior of the furnace (2). A collection flue (12) is provided at the bottom of the furnace (2). Several collection flue gas inlets (13) are provided at the top of the collection flue (12) that are connected to the furnace (2). The collection flue outlet (14) of the collection flue (12) extends to the outside of the furnace (2). During production, the volatile matter in the material tank (4) enters the interior of the furnace (2) through the volatile matter outlet (8) at the top of the material tank (4), mixes with the air entering from the air inlet (9), and burns to produce high-temperature flue gas. Under the action of negative pressure, the high-temperature flue gas enters the collection flue (12) through the collection flue gas inlet (13) and is discharged through the collection flue outlet (14).

2. The carbon calcining furnace according to claim 1, characterized in that: Summarize the flue (12) and set it horizontally or vertically.

3. A carbon calcining furnace according to claim 2, characterized in that: The total length of the flue (12) within the furnace (2) is greater than or equal to 80% of the length or width of the furnace (2).

4. A carbon calcining furnace according to claim 2 or 3, characterized in that: When the converging flue (12) is set vertically, several material tanks (4) in each row are set horizontally in a row, and the converging flue (12) is set vertically between the material tanks (4).

5. A carbon calcining furnace according to claim 4, characterized in that: The flue (12) is located at the bottom of the inter-tank brick (6) between several material tanks (4) in each row.

6. A carbon calcining furnace according to claim 4, characterized in that: The flue gas inlet (13) of the flue gas duct (12) is set in a corresponding position to each row of material tanks (4).

7. A carbon calcining furnace according to claim 2 or 3, characterized in that: When the converging flue (12) is set horizontally, the converging flue (12) is set in the middle of the furnace (2).

8. A carbon calcining furnace according to claim 1, characterized in that: Several air inlets (9) are set up, corresponding to the positions between several discharge tanks (4) and between the tanks (4) and the inner wall of the furnace (2).

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