Ring type roasting furnace with cover

Abstract

The invention discloses an annular roasting furnace with a cover, which relates to the field of high-temperature roasting, and comprises a furnace body, a furnace cover, a peripheral wall, a first flue gas channel and a second flue gas channel, the furnace bodies are annularly connected, material cavities are formed in the furnace bodies, and a plurality of saggers are stacked in the material cavities; the peripheral wall comprises a partition wall and a side wall, every two transversely adjacent material cavities are separated through the partition wall and a fire well wall, the first flue gas channel is formed in the fire well wall, the second flue gas channel is formed in the bottom of the partition wall, every two transversely adjacent material cavities are communicated through the first flue gas channel and the second flue gas channel, and the first flue gas channel is communicated with the second flue gas channel. The technical problems that heat storage loss is large and product energy consumption is high due to a large amount of materials at the furnace bottom of an existing ring type roasting furnace with a cover, and the service life of the roasting furnace is greatly shortened due to the fact that an existing furnace core adopts more kinds of checker bricks as a material box and a smoke channel are effectively solved.

Description

Technical Field

[0001] The invention relates to the field of high-temperature roasting, in particular to a ring-type roasting furnace with a cover. Background Art

[0002] The covered furnace is mainly used for the primary roasting of electrodes. In recent years, covered furnaces are also used to roast cathodes, special carbons, negative electrode carbonization, etc. The products roasted in covered furnaces have the advantages of uniform temperature and good comprehensive indicators.

[0003] However, the structure of the covered furnace is relatively complex. First, the furnace bottom is used as a flue flow channel, and the design thickness is large. It is also necessary to design a wide variety of kang surface and kang pier bricks. The large amount of material at the furnace bottom leads to large heat storage losses, which is also an important reason for the high energy consumption of the product. Second, the furnace core uses more types of checkered bricks as the material box and flue gas channel. Due to the large load and lateral pressure borne by the furnace core, high temperature, and harsh working conditions, the checkered brick material box of the furnace core is also the most vulnerable part of the covered furnace, which greatly reduces the service life of the roasting furnace. In view of the above problems, how to ensure the stable roasting quality of the covered furnace and effectively solve the above problems is the primary problem that needs to be solved in the industry in recent years. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a ring-type roasting furnace with a cover, which solves the technical problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a covered ring-type roasting furnace, comprising a furnace body and a furnace cover, wherein the furnace cover is arranged on the top of the furnace body, and further comprising a peripheral wall, a first smoke passage, and a second smoke passage; a plurality of the furnace bodies are connected in a ring, and a material cavity is opened in each furnace body, wherein a plurality of saggers are stacked in the material cavity; The surrounding wall includes a partition wall and a side wall. Two laterally adjacent material chambers are separated by a partition wall and a fire well wall. The first smoke channel is opened in the fire well wall, and the second smoke channel is opened at the bottom of the partition wall. Two laterally adjacent material chambers are connected through the first smoke channel and the second smoke channel.

[0006] Preferably, the first smoke channel includes a fire well channel, the fire well channel is opened in the fire well wall, a lower escape hole is opened on the fire well wall, an upper escape hole is opened on the partition wall, and the upper escape hole and the lower escape hole are both connected to the fire well channel.

[0007] Preferably, the second smoke channel includes a connecting channel and a collecting channel, and the connecting channel and the collecting channel are both opened at the bottom of the partition wall, and the connecting channel and the collecting channel are both connected to the fire well channel.

[0008] Preferably, a end wall is provided on one side of the end furnace body, and a total connecting flue is opened at the bottom of the end wall. The longitudinally adjacent furnace bodies are connected through the total connecting flue.

[0009] Preferably, a plurality of end connecting channels are opened on the end wall, and the end material chamber is connected to the total connecting flue through the plurality of end connecting channels.

[0010] Preferably, a end wall descending channel is opened in the end wall. The top of the end wall descending channel is connected to the end material chamber through an upper escape hole, and the bottom of the end wall descending channel is connected to the end connecting channel.

[0011] Preferably, the side wall is arranged in a U shape on the front side wall, the rear side wall and the bottom wall of the material chamber, and side wall heat preservation layers are arranged on the inner walls of the side wall.

[0012] Preferably, a furnace bottom heat preservation layer is provided at the bottom of the furnace bottom, and a concrete foundation is provided below the furnace bottom heat preservation layer.

[0013] Beneficial effects The present invention provides a covered ring-type roasting furnace, which has the following beneficial effects: 1. Abandon the material box lattice brick structure of the original traditional covered roasting furnace. The material chamber has a large space and can place more material pots, greatly improving the furnace loading capacity; 2. And the furnace bottom structure is simplified. There is no bottom flue gas flow channel of the traditional furnace type, saving a large amount of materials, and the furnace materials and construction cost are significantly reduced; 3. And the material weight is greatly reduced. The heat storage capacity of the furnace during the heating process will be significantly reduced, and at the same time, the energy consumption level is greatly reduced; 4. In addition, the most vulnerable design of the traditional lattice brick material box is cancelled, and the service life of the furnace is significantly extended. Brief description of the drawings

[0014] Figure 1 is the front view internal structure schematic diagram of the present invention; Figure 2 is Figure 1 the sectional view taken along A-A in Figure 3 is Figure 2 the sectional view taken along B-B in

[0015] In the figure: 1, fire well channel; 2, furnace cover; 3, pot; 4, partition wall; 5, upper escape hole; 6, end wall; 7, end wall descending channel; 8, connecting channel; 9, summary channel; 10, lower escape hole; 11, furnace bottom; 12, furnace bottom heat preservation layer; 13, concrete foundation; 14, end connecting channel; 15, total connecting flue; 16, side wall heat preservation layer; 17, side wall; 18, fire well wall; 19, material chamber. Detailed implementation manners

[0016] Next, in combination with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Among them, the orientation nouns such as "upper" and "lower" mentioned herein are based on Figure 1 the orientation.

[0017] Please refer to Figures 1-3 , the present invention provides a technical solution: a covered ring-type roasting furnace, including a furnace body and a furnace cover 2. The furnace cover 2 is arranged on the top of the furnace body, and also includes a peripheral wall, a first flue gas passage, and a second flue gas passage; a plurality of the furnace bodies are connected in a ring, and a material chamber 19 is provided in each furnace body. A plurality of saggers 3 are stacked in the material chamber 19; The peripheral wall includes a partition wall 4 and a side wall 17. The two adjacent material chambers 19 in the transverse direction are separated by the partition wall 4 and a fire well wall 18. The first flue gas passage is opened in the fire well wall 18, and the second flue gas passage is opened at the bottom of the partition wall 4. The two adjacent material chambers 19 in the transverse direction are connected through the first flue gas passage and the second flue gas passage.

[0018] By providing the material chamber 19, saggers 3 can be stacked in the material chamber 19. By stacking a plurality of saggers 3, the materials to be roasted can be placed in the saggers 3 for roasting. By providing the partition wall 4, the two adjacent material chambers 19 along the length direction of a plurality of furnace bodies can be separated. By providing the fire well wall 18, the first flue gas passage can be opened in the fire well wall 18. By providing the first flue gas passage, under the action of negative pressure, the high-temperature flue gas can enter the material chamber 19 from bottom to top through the first flue gas passage. At this time, the high-temperature flue gas can fully exchange heat with the saggers 3. By providing the second flue gas passage, the flue gas after heat exchange can enter the first flue gas passage of the next material chamber 19 through the second flue gas passage. The structural design of this device abandons the original material box checker brick structure of the traditional covered roasting furnace. The material chamber 19 has a large space and can place more material saggers 3, greatly improving the furnace loading capacity. And the structure of the furnace bottom 11 is simplified, without the bottom flue gas flow channel of the traditional furnace type, saving a large amount of materials. The furnace materials and construction cost are significantly reduced, and the material weight is greatly reduced. The heat storage capacity of the furnace during the heating process will be significantly reduced, and at the same time, the energy consumption level is greatly reduced. In addition, the most vulnerable traditional checker brick material box is cancelled, and the service life of the furnace is significantly extended.

[0019] Further, the first flue gas passage includes a fire well passage 1. The fire well passage 1 is opened in the fire well wall 18. A lower escape hole 10 is opened on the fire well wall 18, and an upper escape hole 5 is opened on the partition wall 4. Both the upper escape hole 5 and the lower escape hole 10 are communicated with the fire well passage 1.

[0020] By providing a fire well passage 1, under the action of negative pressure, the high-temperature flue gas can enter the material chamber 19 from bottom to top through the fire well passage 1, and fully exchange heat with the sagger 3, so that the temperature of the material in the sagger 3 can be raised to an upper limit temperature in the material chamber 19. To prevent the formation of eddy current areas in the two corner regions of the material box during the heat exchange between the flue gas and the material, resulting in low material temperature in this area and affecting the qualified product rate, lower escape holes 10 and upper escape holes 5 are provided in the diagonal regions of each material box, so that a small amount of flue gas can flow into the theoretically eddy current area through the escape holes, making the flue gas flow smoothly, the heat field distribution uniform, the material temperature rise basically unaffected and the temperature difference relatively reduced.

[0021] Further, the second flue gas passage includes a connecting passage 8 and a collecting passage 9. The connecting passage 8 and the collecting passage 9 are both provided at the bottom of the partition wall 4, and the connecting passage 8 and the collecting passage 9 are both connected to the fire well passage 1.

[0022] By providing the connecting passage 8 and the collecting passage 9, after heat exchange, the flue gas continues to enter the collecting passage 9 from the connecting passage 8 from top to bottom under the action of negative pressure, and then enters the fire well passage 1 of the next material chamber 19 to continue the repeated path of the next material chamber 19.

[0023] Further, a end wall 6 is provided on one side of the end furnace body. A main connecting flue 15 is provided at the bottom of the end wall 6, and the longitudinally adjacent furnace bodies are connected through the main connecting flue 15.

[0024] By providing the main connecting flue 15, the material chambers 19 arranged in the width direction can be connected through the main connecting flue 15. The flue gas entering the main connecting flue 15 can enter the material chamber 19 of the next furnace body arranged in the width direction through the main connecting flue 15 to complete the end transition stage of the annular working process.

[0025] Further, a number of end connecting passages 14 are provided on the end wall 6. The end material chamber 19 is connected to the main connecting flue 15 through the number of end connecting passages 14.

[0026] When the flue gas runs to the end material chamber 19 in sequence, the flue gas can enter the main connecting flue 15 from the end connecting passage 14.

[0027] Further, an end wall descending passage 7 is provided in the end wall 6. The top of the end wall descending passage 7 is connected to the end material chamber 19 through the upper escape hole 5, and the bottom of the end wall descending passage 7 is connected to the end connecting passage 14.

[0028] By providing the end wall descending passage 7, part of the high-temperature flue gas can enter the end wall descending passage 7 through the upper escape hole 5, and then enter the end connecting passage 14.

[0029] Furthermore, the side wall 17 is U-shaped and arranged on the front side wall, the rear side wall and the bottom wall of the material chamber 19, and the inner wall of the side wall 17 is provided with a side wall insulation layer 16.

[0030] Furthermore, a furnace bottom insulation layer 12 is provided at the bottom of the furnace bottom 11 , and a concrete foundation 13 is provided below the furnace bottom insulation layer 12 .

[0031] The working principle and use process of the present invention are as follows: when in use, the negative electrode, electrode, special carbon and other materials to be roasted are placed in a heat-resistant steel sagger 3, and then the sagger 3 is hoisted into the material box and stacked neatly in order. After the sagger 3 is filled, the furnace cover 2 is hoisted and placed on the furnace top and the furnace cover 2 and the surrounding masonry are sealed. Under the action of negative pressure, the high-temperature flue gas passes through the fire well channel 1 from bottom to top and enters the material chamber 19. The high-temperature flue gas and the sagger 3 undergo sufficient heat exchange, and the material temperature in the sagger 3 rises to an upper limit temperature in the material chamber 19. After the heat exchange, the flue gas continues to enter the collecting channel 9 from the connecting channel 8 from top to bottom under the action of negative pressure, and then enters the fire well channel 1 of the next material chamber 19, and continues the repeated path of the next material chamber 19. When the smoke runs to the end material chamber 19 in sequence, the smoke also runs from top to bottom in the end material chamber 19, enters the total connecting fire channel 15 from the end connecting channel 14 at the bottom of the end wall 6, and then passes through the total connecting fire channel 15. After entering the next end jumper material chamber 19, the smoke begins to run in sequence from the other side material chamber 19.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ring-type roasting furnace with a cover, comprising a furnace body and a furnace cover (2), wherein the furnace cover (2) is arranged on the top of the furnace body, characterized in that: It also includes a peripheral wall, a first smoke channel, and a second smoke channel; a plurality of furnace bodies are connected in a ring shape, and a material cavity (19) is provided in each furnace body, and a plurality of saggers (3) are stacked in the material cavity (19); The peripheral wall comprises a partition wall (4) and a side wall (17); two transversely adjacent material chambers (19) are separated by the partition wall (4) and the fire well wall (18); the first smoke channel is opened in the fire well wall (18); the second smoke channel is opened at the bottom of the partition wall (4); and the two transversely adjacent material chambers (19) are connected via the first smoke channel and the second smoke channel.

2. A ring-type roasting furnace with a cover according to claim 1, characterized in that: The first smoke channel comprises a fire well channel (1), the fire well channel (1) is opened in the fire well wall (18), a lower escape hole (10) is opened on the fire well wall (18), an upper escape hole (5) is opened on the partition wall (4), and the upper escape hole (5) and the lower escape hole (10) are both connected to the fire well channel (1).

3. A ring-type roasting furnace with a cover according to claim 2, characterized in that: The second smoke channel comprises a connecting channel (8) and a collecting channel (9), and the connecting channel (8) and the collecting channel (9) are both opened at the bottom of the partition wall (4), and the connecting channel (8) and the collecting channel (9) are both connected to the fire well channel (1).

4. A ring-type roasting furnace with cover according to claim 1, characterized in that: An end wall (6) is provided on one side of the end furnace body, a general communication fire channel (15) is provided at the bottom of the end wall (6), and the furnace bodies adjacent to each other in the longitudinal direction are connected via the general communication fire channel (15).

5. A ring-type roasting furnace with cover according to claim 4, characterized in that: The end wall (6) is provided with a plurality of end connection channels (14), and the end material cavity (19) is connected with the main connecting fire channel (15) through the plurality of end connection channels (14).

6. A ring-type roasting furnace with cover according to claim 5, characterized in that: An end wall descending channel (7) is provided in the end wall (6), the top of the end wall descending channel (7) is connected to the end material cavity (19) through the upper escape hole (5), and the bottom of the end wall descending channel (7) is connected to the end connecting channel (14).

7. The ring-type roasting furnace with cover according to claim 1, characterized in that: The side walls (17) are U-shaped and arranged on the front side walls, rear side walls and bottom wall of the material chamber (19), and the inner walls of the side walls (17) are provided with side wall insulation layers (16).

8. The ring-type roasting furnace with cover according to claim 1, characterized in that: A furnace bottom insulation layer (12) is arranged at the bottom of the furnace bottom (11), and a concrete foundation (13) is arranged below the furnace bottom insulation layer (12).

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