CN113551519A

CN113551519A - Kiln cooling section

Info

Publication number: CN113551519A
Application number: CN202110859286.9A
Authority: CN
Inventors: 刘广龙; 冀胜利; 唐志强
Original assignee: Hunan Shanshan Energy Technology Co Ltd
Current assignee: BASF Shanshan Battery Materials Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2021-10-26

Abstract

The invention discloses a kiln cooling section, which comprises a kiln body provided with a conveying roller rod, wherein side jackets are arranged on two sides of the kiln body, a bottom jacket is arranged at the bottom of the kiln body, a jacket air supply opening for introducing cooling air into the side jackets is arranged on one side of the side jackets, a jacket vent opening connected with the bottom jacket is arranged on the other side of the side jackets, and a jacket air outlet is arranged at the bottom of the bottom jacket. According to the invention, by optimizing the structure of the furnace body and arranging the bottom jacket and the side jacket, the problems that the cooling effect of the furnace tail of the roller kiln is poor, the discharging temperature of a product is too high, and the influence on equipment in the subsequent process is caused are solved. Furthermore, the temperature-resistant and corrosion-resistant plate capable of bearing corrosive atmosphere and upward flowing heat in the furnace body is arranged, so that the problem that foreign matters are introduced due to corrosion of high-temperature materials in the cooling section is solved, and the product quality of the lithium battery material is obviously improved.

Description

Kiln cooling section

Technical Field

The invention relates to the technical field of roller way kilns, in particular to a kiln cooling section used for sintering lithium battery materials.

Background

The furnace body of the dynamic furnace is generally divided into three sections in temperature zone distribution, a heating and temperature-raising section, a constant temperature reaction section and a temperature-reducing and cooling section, the sintering temperature of the furnace can reach more than 1000 ℃, the cooling speed of the temperature-reducing and cooling section of the furnace needs to meet certain process requirements, the capacity of the furnace is reduced if the cooling section is too long, the cooling section is too short, materials are not cooled down, the temperature of discharged materials is too high, the control and quality control of the next process are not facilitated, the requirements on the materials of the temperature-reducing and cooling section of the furnace, such as good thermal conductivity and good high temperature resistance, are required, the reaction sintering in the lithium battery material industry has more strict requirements on the furnace body, and foreign matters are not allowed to be introduced.

Most of the used cooling sections of the sintering kiln in the lithium battery industry are of a jacket structure made of stainless steel, an air inlet and an air outlet are formed in an opening of the jacket, and the heat is taken away by ventilation in the jacket by air, but the heat taken away by the mode is limited, and the air is required to be introduced into the kiln to directly assist in cooling the material; with the upgrading of products, such as high-nickel materials and the like, the kiln is required to be sealed, oxygen or other protective gas is introduced, the cost of the introduced gas is high, the temperature is reduced by introducing the oxygen or other gas into the kiln, the production economy is not met, at present, the modes of furnace tail air cooling or water cooling and the like are adopted, but the risks of foreign matters, corrosion risks and the like brought at the same time cannot be avoided, and the heat dissipation effect is still limited.

Chinese patent CN207280181U discloses an air-cooled roller kiln, in which cooling air in a jacket flows from bottom to top, so as to take away heat conducted by a hearth. Wherein, the cooling air and the heat flow direction in the hearth are the same, and simultaneously, the hearth is formed by piling refractory bricks. On one hand, the heat dissipation efficiency is low due to the co-directional flow of cooling air and heat in the hearth and the low heat conduction efficiency of the refractory bricks; on the other hand, the arrangement of the refractory bricks in the hearth can inevitably cause foreign matters to fall into the hearth, so that the quality of the battery material is influenced.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a cooling section for cooling a kiln.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the utility model provides a kiln cooling section, is including installing the furnace body of conveying roller stick, the both sides of furnace body all are provided with the side and press from both sides the cover, the bottom of furnace body is provided with the bottom and presss from both sides the cover, one side that the side pressed from both sides the cover is provided with and is used for to the side press from both sides the cover air supplement mouth that presss from both sides that lets in cooling gas in the cover, the opposite side be provided with the cover vent that presss from both sides the cover connection is pressed from both sides to the bottom, the bottom that the bottom pressed from both sides the cover is provided with presss from both sides the cover air exit.

Furthermore, the side jacket comprises a side jacket inner layer close to the center of the furnace body and a side jacket outer layer far away from the center of the furnace body, a roller rod hole sleeve is fixedly connected between the side jacket inner layer and the side jacket outer layer, a roller rod support is installed on the side jacket outer layer, and any end of the conveying roller rod penetrates through the roller rod hole sleeve and is supported by the roller rod support.

Furthermore, the bottom jacket comprises a bottom plate and an intermediate plate arranged above the bottom plate, two ends of the bottom plate and the intermediate plate are fixedly connected with the inner layers of the side jacket on two sides, and the intermediate plate is arranged close to the conveying roller rod.

Furthermore, a temperature-resistant and corrosion-resistant plate capable of bearing corrosive atmosphere and upward flowing heat in the furnace body is arranged above the conveying roller rod of the furnace body.

Furthermore, the heat-resistant corrosion-resistant plate is internally provided with heat dissipation holes which are communicated with each other, one side of the furnace body is provided with an air inlet interface communicated with the inside of the furnace body, the other side of the furnace body is provided with an air exhaust interface communicated with the inside of the furnace body, one ends of the heat dissipation holes are communicated with the air inlet interface, and the other ends of the heat dissipation holes are communicated with the air exhaust interface.

Further, the temperature-resistant and corrosion-resistant plate is a silicon carbide plate.

Furthermore, a supporting step for supporting the temperature and corrosion resistant plate is arranged at the top of the side jacket, and a slide way capable of being in sliding connection with the temperature and corrosion resistant plate is formed between the supporting step and a top plate of the furnace body.

Furthermore, the front end and the rear end of the silicon carbide plate along the conveying direction of the furnace body are respectively provided with a flange and a groove which are convenient for splicing and forming.

Furthermore, the air exhaust device further comprises a connecting piece, wherein the connecting piece comprises a connecting section with threads arranged at one end and an air vent section with an air valve arranged at the other end, the connecting section is in threaded connection with the air exhaust interface, and the air vent section is connected with the heat exhaust fan.

Furthermore, the end part of the connecting section is inserted and installed in the inner part of one end of the heat dissipation hole.

Compared with the prior art, the invention has the advantages that:

according to the invention, by optimizing the structure of the furnace body, and by arranging the bottom jacket and the side jacket, the direction of the cooling wind against the heat flow and the like, the problems that the cooling effect of the furnace tail of the roller kiln is poor, the discharging temperature of a product is too high, and the influence on equipment in the subsequent process is caused are solved; furthermore, the problem of foreign matters introduced by the corrosion of high-temperature materials in the cooling section is solved through the arrangement of the temperature-resistant and corrosion-resistant plate capable of bearing corrosive atmosphere and upward flowing heat in the furnace body, and the product quality of the lithium battery material is obviously improved; meanwhile, the spliced hollow silicon carbide plate is used as the material of the top in the furnace body, the silicon carbide plate with the inner hole is high-temperature resistant and corrosion resistant, and the heat transfer efficiency is obviously improved; because the heat of the product in the furnace body is mainly at the upper part, the product is ventilated and radiated through the radiating holes in the silicon carbide plate, the heat radiation and heat transfer between the product and the silicon carbide plate are increased to reduce the temperature of the product, and the heat radiation and heat transfer area and the heat radiation and wind quantity are better than those of the existing heat radiation mode.

Drawings

FIG. 1 is a schematic front view of a cooling section of a kiln disclosed in a preferred embodiment of the invention;

FIG. 2 is a schematic sectional view A-A of FIG. 1;

FIG. 3 is a schematic side view of a kiln cooling section according to a preferred embodiment of the present invention;

FIG. 4 is a schematic bottom view of the kiln cooling section disclosed in the preferred embodiment of the present invention;

FIG. 5 is a schematic front view of a silicon carbide plate as disclosed in a preferred embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view B-B of FIG. 5;

fig. 7 is a front view of the connector disclosed in the preferred embodiment of the present invention.

Illustration of the drawings:

1. a furnace body; 11. an air inlet interface; 12. an air exhaust interface; 2. a transfer roller; 3. a side jacket; 31. a jacket air supplement port; 32. a jacket vent; 33. the side jacket inner layer; 34. the side jacket outer layer; 35. a roll rod hole sleeve; 36. supporting a step; 4. a bottom jacket; 41. a jacket air outlet; 42. a middle plate; 43. a base plate; 5. a roll bar support; 6. a temperature-resistant corrosion-resistant plate; 61. heat dissipation holes; 62. a flange; 63. a groove; 64. a butt joint hole; 7. a connecting member; 71. a connecting section; 72. a vent section; 8. a support leg; 9. a slideway.

Detailed Description

In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.

As shown in fig. 1-7, the embodiment discloses a cooling section for cooling a kiln, which comprises a furnace body 1 provided with a conveying roller rod 2, the bottom of the furnace body 1 is supported by supporting legs 8, the furnace body 1 is mainly made of stainless steel material, the cross section of the furnace body 1 is square or rectangular, side jackets 3 are symmetrically arranged on two sides of the furnace body 1, a bottom jacket 4 is arranged at the bottom of the furnace body 1, a jacket air supply port 31 for supplying cooling air into the side jacket 3 is arranged on one side of the side jacket 3, a jacket vent 32 connected with the bottom jacket 4 is arranged on the other side of the side jacket 3, a jacket air exhaust port 41 is arranged at the bottom of the bottom jacket 4, so that the cooling air introduced from the outside enters from the jacket air supply port 31 and is exhausted from the jacket air exhaust port 41 through the jacket vent 32, and the bottom jacket 4 and the side jacket 3 tend to wrap the inner cavity of the furnace body 1, heat exchange is carried out from the left, the right and the bottom of the furnace body 1, and heat conduction and heat dissipation can be rapidly carried out; on the other hand, the flowing direction of the cooling wind is opposite to the flowing direction of the heat, namely the cooling wind flows against the heat, so that the cooling efficiency in the furnace body 1 is improved.

Specifically, the side jacket 3 comprises a side jacket inner layer 33 close to the center of the furnace body 1 and a side jacket outer layer 34 far away from the center of the furnace body 1, the side jacket outer layer 34 shares with the side wall of the furnace body 1, a roller rod hole sleeve 35 is welded and fixed between the side jacket inner layer 33 and the side jacket outer layer 34, a roller rod support 5 is installed on the side jacket outer layer 34, heat is conducted into the side jacket 3 through the side jacket inner layer 33, any end of the conveying roller rod 2 penetrates through the roller rod hole sleeve 35 and is supported by the roller rod support 5, so that the sealing problem caused when the conveying roller rod 2 penetrates through the side jacket 3 is prevented, the conveying roller rod 2 extending out of the furnace body 1 is driven to rotate through an external driving device, and the saggar edge loaded with lithium battery materials on the conveying roller rod 2 in the furnace body 1 is driven to move and cool. And the bottom jacket 4 comprises a bottom plate 43 and an intermediate plate 42 arranged above the bottom plate 43, the two ends of the bottom plate 43 and the intermediate plate 42 are fixedly connected with the jacket inner layers 33 on the two sides, so that a sealed cavity is formed, the intermediate plate 42 is arranged close to the conveying roller rod 2, and heat is conducted into the bottom jacket 4 through the intermediate plate 42.

In this embodiment, the top that furnace body 1 is located conveying roller 2 is provided with the temperature resistant corrosion-resistant board 6 that can bear the heat that upwards flows in furnace body 1, this is because the foreign matter that pollutes battery material on the one hand mainly drops the introduction from the product above, on the other hand, the heat that produces after the material sintering mainly goes up the side, the last lateral wall in the main radiation furnace body 1 of thermal radiation, consequently, can bear 800 ℃ of high temperature at least through temperature resistant corrosion-resistant board 6, and simultaneously, also can bear the corruption that sintering corrosive atmosphere caused in the stove, thereby, avoid introducing the foreign matter. Meanwhile, in order to facilitate the rapid assembly of the temperature and corrosion resistant plate 6, a supporting step 36 for supporting the temperature and corrosion resistant plate 6 is arranged at the top of the side jacket 3, and a gap slightly larger than the thickness of the temperature and corrosion resistant plate 6 exists between the supporting step 36 and the top plate of the furnace body 1, so that a slide way 9 capable of being in sliding connection with the temperature and corrosion resistant plate 6 is formed, and the assembly can be completed only by pushing the temperature and corrosion resistant plate 6 into the slide way 9. Simultaneously, the temperature and corrosion resistant plate 6 is provided with flange 62 and the recess 63 of being convenient for the concatenation to take shape respectively along furnace body 1 direction of delivery's front and back both ends to temperature and corrosion resistant plate 6 passes through flange 62 and recess 63 and the polylith concatenation is in the same place, has promoted holistic steadiness, prevents the carborundum board drunkenness from top to bottom, has also improved the efficiency of assembly.

In the embodiment, the temperature-resistant and corrosion-resistant plate 6 is a silicon carbide plate, and on one hand, the silicon carbide material has a heat conductivity coefficient of 45w/(m × k) and has very good heat conductivity; on the other hand, the silicon carbide material has high temperature resistance of more than 1400 ℃, strong corrosion resistance which is far higher than that of materials such as stainless steel, and the like, and the silicon carbide plate has no risk of introducing foreign matters. Be provided with the louvre 61 that link up the setting in the carborundum board, furnace body 1 one side is provided with the air inlet interface 11 with the inside intercommunication of furnace body 1, the opposite side is provided with the inside intercommunication air exhaust interface 12 with furnace body 1, air inlet interface 11 and air exhaust interface 12 are the sleeve structure, louvre 61's one end with air inlet interface 11 intercommunication, the other end with air exhaust interface 12 intercommunication, specifically, air exhaust interface 12 is provided with a connecting piece 7 (air inlet interface 11 also can set up equally), connecting piece 7 includes that one end sets up screwed linkage segment 71 and the other end is provided with vent section 72 of blast gate, linkage segment 71 and air exhaust interface 12 threaded connection, vent section 72 is connected with hot exhaust fan to through hot exhaust fan with louvre 61 interior extraction of air, natural air gets into from air inlet interface 11, discharges from the opposite side after through louvre 61 convection heat exchange. The end part of the connecting section 71 is inserted and installed in the butt joint hole 64 at one end of the heat dissipation hole 61, so that the silicon carbide plate can be stably positioned; meanwhile, the sealing of the furnace body 1 at two sides can be realized, and the air is prevented from entering the furnace body 1 to cause the pollution of internal products.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. The utility model provides a kiln cooling section, is including furnace body (1) of installing conveying roller stick (2), its characterized in that, the both sides of furnace body (1) all are provided with side jacket (3), the bottom of furnace body (1) is provided with bottom jacket (4), one side that side jacket (3) was provided with and is used for pressing from both sides the jacket mends wind gap (31) that lets in cooling gas in jacket (3) to the side, the opposite side be provided with press from both sides the jacket vent (32) that jacket (4) are connected in the bottom, the bottom that the bottom pressed from both sides jacket (4) is provided with and presss from both sides jacket air exit (41).

2. The furnace cooling section according to claim 1, wherein the side jacket (3) comprises a side jacket inner layer (33) close to the center of the furnace body (1) and a side jacket outer layer (34) far away from the center of the furnace body (1), a roller rod hole sleeve (35) is fixedly connected between the side jacket inner layer (33) and the side jacket outer layer (34), a roller rod bracket (5) is installed on the side jacket outer layer (34), and any end of the conveying roller rod (2) penetrates through the roller rod hole sleeve (35) and is supported by the roller rod bracket (5).

3. The kiln cooling section according to claim 2, wherein the bottom jacket (4) comprises a bottom plate (43) and an intermediate plate (42) arranged above the bottom plate (43), both ends of the bottom plate (43) and the intermediate plate (42) are fixedly connected with the side jacket inner layers (33) on both sides, and the intermediate plate (42) is arranged close to the conveying roller rod (2).

4. The cooling section of the kiln according to any one of claims 1 to 3, characterized in that a temperature-resistant and corrosion-resistant plate (6) capable of bearing corrosive atmosphere and upward heat in the kiln body (1) is arranged above the conveying roller (2) of the kiln body (1).

5. The cooling section of the kiln according to claim 4, wherein heat dissipation holes (61) are formed in the temperature-resistant and corrosion-resistant plate (6) in a penetrating manner, an air inlet port (11) communicated with the inside of the kiln body (1) is formed in one side of the kiln body (1), an air exhaust port (12) communicated with the inside of the kiln body (1) is formed in the other side of the kiln body, one end of each heat dissipation hole (61) is communicated with the air inlet port (11), and the other end of each heat dissipation hole is communicated with the air exhaust port (12).

6. The kiln cooling section according to claim 4, characterized in that the temperature and corrosion resistant plates (6) are silicon carbide plates.

7. The cooling section of the kiln according to claim 6, wherein a supporting step (36) for supporting the temperature and corrosion resistant plate (6) is arranged at the top of the side jacket (3), and a slideway (9) which can be in sliding connection with the temperature and corrosion resistant plate (6) is formed between the supporting step (36) and the top plate of the kiln body (1).

8. The furnace cooling section according to claim 6, wherein the front end and the rear end of the silicon carbide plate along the conveying direction of the furnace body (1) are respectively provided with a flange (62) and a groove (63) which are convenient for splicing and forming.

9. The cooling section of the kiln according to claim 7, further comprising a connecting piece (7), wherein the connecting piece (7) comprises a connecting section (71) with a thread at one end and a vent section (72) with an air valve at the other end, the connecting section (71) is in threaded connection with the air exhaust interface (12), and the vent section (72) is connected with a heat exhaust fan.

10. The furnace cooling section according to claim 9, wherein the end of the connecting section (71) is inserted and installed inside one end of the heat dissipation hole (61).