KR20230059174A - Multi-Channel Wheeled-Rail Tunnel Kiln - Google Patents

Abstract

The present invention belongs to the technical field of tunnel kilns, and specifically relates to multi-channel wheel-rail tunnel kilns. The tunnel kiln includes a kiln body, two atmosphere control chambers, a kiln housing and an atmosphere control device. Here, the kiln housing surrounds the kiln body. Two atmosphere control chambers are connected to both ends of the kiln body, respectively, and an atmosphere control device is installed in the kiln body. The tunnel kiln can realize relatively high output and provide good atmosphere control.

Description

Multi-Channel Wheeled-Rail Tunnel Kiln

[Cross Reference to Related Applications]

This application is a Chinese patent application filed with the National Intellectual Property Office of China on January 20, 2021 with application number 202110073681.4 and an invention title of "Multi-channel wheel-rail tunnel kiln" and Chinese national knowledge on January 20, 2021 Priority is claimed for a Chinese patent application filed with the Property Office with application number 202120158273.4 and titled "Multi-Channel Wheel-Rail Tunnel Kiln", the entire contents of which are incorporated herein by reference.

The present invention belongs to the technical field of tunnel kilns, and specifically relates to multi-channel wheel-rail tunnel kilns.

In the process of manufacturing a cathode material for a battery such as a lithium ion battery, a high-temperature calcination process determines the physical and chemical properties of the cathode material to a considerable extent, and thus has a great influence on the performance of the finally assembled lithium ion battery. will give At present, continuous kiln furnaces are widely used in the production of positive electrode materials, which are mainly tunnel kilns. The tunnel kiln is typically constructed of fireproof materials, insulating materials, and building materials to form a kiln furnace having a tunnel structure with both ends open. The tunnel kiln includes, for example, a push plate type tunnel kiln (abbreviated as a push plate kiln), a roller bed type tunnel kiln (abbreviated as a roller bed kiln) and a wheel-rail type tunnel kiln (kiln car type tunnel Also abbreviated as a kiln) may be implemented in various ways, and the positive electrode material may be calcined at a high temperature through a continuous kiln furnace.

However, the push plate kiln and the roller bed kiln have a problem in that the output is relatively low. The wheel-rail type tunnel kiln, which is a continuous kiln furnace, is relatively higher than the above both in terms of yield, but there are problems such as poor airtightness, so production of positive electrode materials with relatively high requirements for the calcination atmosphere. difficult to apply to.

An object of the present invention is to provide a multi-channel wheel-rail tunnel kiln capable of improving at least one of problems such as yield and airtightness of the tunnel kiln.

A multi-channel wheel-rail tunnel kiln according to the present invention includes a furnace wall, an isolation wall, and a rail, wherein the furnace wall defines a furnace and at the same time includes at least two rails corresponding to the rails one-to-one by the isolation wall. a kiln body partitioned into a kiln chamber and having a rail positioned inside the kiln chamber; A first atmosphere control chamber having a first internal channel connected to the furnace wall at the kiln head through a first hermetic gate and selectively communicating with or isolated from at least two kiln chambers through the first hermetic gate; A second atmosphere control chamber having a second inner channel connected to the furnace wall through a second hermetic gate in the kiln tail portion and selectively communicating with or isolated from at least two kiln chambers through the second hermetic gate; A kiln housing that airtightly surrounds the kiln body; and a gas injection mechanism and a gas discharge mechanism that interlock and control the atmosphere in the at least two kiln chambers, and the gas injection mechanism and the gas discharge mechanism may include an atmosphere control device separately installed on the furnace wall and/or the isolation wall. there is.

Optionally, the tunnel kiln may include a first conditioning chamber housing that hermetically surrounds the first atmosphere control chamber, and a second control chamber housing that hermetically encloses the second atmosphere control chamber. Optionally, both ends of the kiln housing may be in airtight communication with the first control chamber housing and the second control chamber housing, respectively.

Optionally, a first moving mechanism movable by butt jointing with a rail is provided in the first inner channel; And/or, a second moving mechanism movable by butt-coupled with the rail may be provided in the second inner channel.

Optionally, the first internal channels may be a plurality of first sub-channels that are identical to (same as) the number of the at least two kiln chambers and are independent of each other. The first movement mechanism may include a plurality of first sub movement mechanisms respectively located in the plurality of first sub-channels. And/or, the second inner channel may be a plurality of second sub-channels that are identical to (same as) the number of the at least two kiln chambers and are independent of each other. The second movement mechanism may include a plurality of second sub movement mechanisms respectively located in the plurality of second sub channels.

Optionally, two adjacent kiln chambers may share one isolation wall.

Optionally, the gas inlet of the gas injection mechanism may be installed in the isolation wall, and the gas outlet of the gas discharge mechanism may be installed in the furnace wall.

Optionally, the gas inlet of the gas injection mechanism is installed on the furnace wall and the gas outlet of the gas discharge mechanism is installed on the isolation wall; Alternatively, the gas inlet of the gas injection device may be installed on the furnace wall and the isolation wall, respectively, and the gas outlet of the gas discharge device may be installed on the furnace wall and the isolation wall, respectively.

Optionally, when the gas outlet of the gas outlet mechanism is located in the isolation wall, the gas outlet can be communicated with an outlet formed in the bottom of the kiln body.

Optionally, the gas injection mechanism includes a plurality of gas injection sets arranged from a kiln head portion to a kiln tail portion of the kiln body, each gas injection set including a plurality of gas injection ports, the plurality of gas injection ports of the kiln body. Distributed in the cross section, it can be arranged from the kiln bottom of the kiln body to the kiln roof. The gas discharge mechanism includes a plurality of gas discharge sets arranged from a kiln head portion to a kiln tail portion of the kiln body, each gas discharge set including a plurality of gas outlets, the plurality of gas outlets distributed over a cross section of the kiln body. At the same time, it can be arranged from the kiln bottom of the kiln body to the kiln loop.

Optionally, the gas injection set and the gas discharge set are disposed oppositely on the cross section of the kiln body, and/or the gas injection set of the gas injection mechanism and the gas discharge set of the gas discharge mechanism are located on the same side as a partition wall or a furnace wall. may be alternately arranged along a direction from the kiln head of the kiln body toward the kiln tail.

Optionally, the furnace wall may be configured such that a guide groove is installed at a portion of the kiln body close to the kiln bottom, and the guide groove is configured so that carriers moving in the multi-channel wheel-rail tunnel kiln are inserted (coupled).

Optionally, the carrier has a protruding structure, and the protruding structure may be fit into the guide groove.

Optionally, the guide groove may have a U-shaped cross section, and the guide groove may extend from the kiln head portion to the kiln tail portion of the kiln body.

Optionally, eyelets may be uniformly distributed on the guide groove.

Optionally, a gas distribution chamber and an injector may be installed in the isolation wall, and the gas distribution chamber may be configured to allow gas to pass through the gas inlet and dispersely inject through the injector.

Optionally, a carrier driving device may be installed in each of the first atmosphere control chamber and the second atmosphere control chamber.

Optionally, the carrier drive may include a towing chain and a hydraulic thruster.

The multi-channel wheel-rail tunnel kiln according to the present invention prevents unnecessary gas (eg, impurity gas) from flowing into the kiln body in the process of transporting materials, and can also block interference with the atmosphere in the kiln body from the outside world. . Therefore, by combining a structural design that blocks the influence of interfering gases and a structural design that transports materials with high efficiency, the multi-channel wheel-rail tunnel kiln can have a higher output.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, drawings used in the embodiments will be briefly introduced in order to more clearly describe the technical proposals of the embodiments according to the present invention. It should be understood that, although only some embodiments of the present invention are shown in the following drawings, they should not be considered as limiting the scope of protection of the present invention, and those skilled in the art to which this application belongs are creative. Other drawings may be obtained from these drawings on the premise that labor is not paid.
1 is an exemplary view showing the front structure of a multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.
FIG. 2 is an exemplary view showing the cross-sectional structure of a kiln body in the multi-channel wheel-rail tunnel kiln shown in FIG. 1;
FIG. 3 is an exemplary view showing a planar structure of a multi-channel wheel-rail tunnel kiln shown in FIG. 1;
4 is an exemplary view showing a planar structure of another multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.
5A is an exemplary view showing a structure at a first viewing angle according to a first gas control method in a kiln body of a multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.
5B is an exemplary view showing a structure at a second viewing angle according to a first gas control method in the kiln body of a multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.
6A is an exemplary view showing a structure at a first viewing angle according to a second gas control method in the kiln body of a multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.
6B is an exemplary view showing a structure at a second viewing angle by a second gas control method in the kiln body of a multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.
7A is an exemplary view showing a structure at a first viewing angle by a third gas control method in the kiln body of a multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.
7B is an exemplary view showing a structure at a second viewing angle by a third gas control method in the kiln body of a multi-channel wheel-rail tunnel kiln according to an embodiment of the present invention.

A cathode material of a battery such as a lithium ion battery or the like needs to be calcined in a production process. For example, many other types of positive electrode materials, such as high-nickel ternary or lithium iron phosphate, have relatively high requirements for the calcination atmosphere during high-temperature calcination. Therefore, how to produce a positive electrode material through calcining the material with high efficiency and high quality is one problem that needs to be carefully considered.

In response to the above demand, the inventor proposed the multi-channel wheel-rail tunnel kiln of the present invention after studying conventional calcination equipment (mainly a tunnel kiln). Here, the present invention proposes the tunnel kiln by manufacturing a positive electrode material based on calcination, but this does not limit the use form of the tunnel kiln. That is, the tunnel kiln can also be applied to calcination of other materials. For example, ceramics, inorganic material powder, or other alloy materials can be calcined, and other operations such as annealing can be performed, but the present invention is not limited to the form applied to the tunnel kiln.

1 to 3, the multi-channel wheel-rail tunnel kiln mainly includes a kiln body and two atmosphere control chambers (for convenience of distinction and explanation, a first atmosphere control chamber 24 and a second atmosphere control chamber 24, respectively). denoted by atmosphere control chamber 25), kiln housing 28 and atmosphere control device. Here, the fact that the kiln housing 28 hermetically encloses the kiln body makes it possible to reduce and even completely avoid the adverse effects of foreign gases entering the kiln body and interfering with the calcination atmosphere. The atmosphere control device is configured to adjust the atmosphere in the kiln body so that it can satisfy the actual calcination requirements of the positive electrode material. For example, it may be configured to regulate process gases required for calcination. Here, the two atmosphere control chambers 24 and 25 are connected to the kiln head part and the kiln tail part of the kiln body, respectively, to perform gas control during the transport of the positive electrode material, so that outside gas is discharged from the kiln head part or the kiln tail part to the kiln. It can avoid entering into the main body and interfering with the calcination atmosphere. In addition, the positive electrode material can be rapidly transported with high efficiency in the tunnel kiln in a state in which interference gas is not introduced through the structure of the atmosphere control chambers 24 and 25 . Overall, a high quality positive electrode material can be produced with a high yield through the combination of each part of the tunnel kiln.

In the multi-channel wheel-rail tunnel kiln, generally, a kiln car can be selected and used as a transport facility (also referred to as a carrier) of the positive electrode material. And, in practical applications, it is possible to load the calcined material on the carrier through various containers (for example, fireproof bags (2, saggar)). When carrying out the calcination operation, a container full of calcination material is placed on the carrier, and both are introduced into the first atmosphere regulating chamber 24 together from the outside of the tunnel kiln. After the first atmosphere control chamber 24 performs atmosphere control, it may enter the kiln body to perform calcination, and then enter the second atmosphere control chamber 25 again. Then, the carrier may be withdrawn from the second atmosphere conditioning chamber 25 and subjected to atmosphere conditioning to complete the calcination process.

Hereinafter, each component of the multi-channel wheel-rail tunnel kiln will be described in detail with reference to the above use process.

The kiln body may be formed extending from a kiln head (inlet of a material to be calcined) toward a kiln tail (outlet of a material to be calcined). Therefore, for convenience of description, a direction from the kiln head part to the kiln tail part may be defined as the length direction, and a direction perpendicular to the length direction at an arbitrary position may be defined as the width direction. That is, a direction from one side of the furnace wall to the other side of the furnace wall may be defined as the width direction, and a direction from the bottom of the kiln to the kiln roof portion 16 may be defined as the height direction. 1 shows the distribution of each part in the longitudinal direction of the tunnel kiln. Here, the two atmosphere control chambers 24 and 25 are respectively located at both ends of the kiln body in the longitudinal direction.

The kiln body is mainly composed of a furnace wall, and may have a furnace 4 defined by being surrounded by the furnace wall shown in FIG. 1 . Here, as shown in FIG. 2, the furnace wall may include, for example, a left wall 171, a right wall 172, and a kiln roof portion 16.

As shown in FIG. 2, an isolation wall 173 is further provided in the furnace 4, and the isolation wall 173 is located at approximately the center of the kiln body in the width direction, and of course may be installed in other locations. However, it is not specifically limited to this here. Also, an upper portion of the isolation wall 173 may contact (or be combined with) the kiln roof portion 16 and a lower portion of the isolation wall 173 may be in contact with (or be coupled to) an airtight housing at the bottom of the kiln. Accordingly, the isolation wall 173 may partition the furnace 4 into a plurality of independent channels so that gas is isolated. The number of channels may be at least two, but the number of channels may vary according to the number of isolation walls 173 . In the illustrated structure of the present invention, one isolation wall 173 is installed in the furnace 4, and the furnace 4 is partitioned into two kiln chambers 901. According to the technique shown in the embodiment according to the present invention, in practical applications, each kiln chamber 901 may have an independent isolation wall 173, and two adjacent kiln chambers 901 may have one The isolation wall 173 may be shared. In a specific embodiment, the structural form of the isolation wall 173 can be adjusted in thickness, shape, etc. according to demand, for example. By sharing the isolation wall 173, the number of installations of the isolation wall 173 can be reduced, thereby reducing the manufacturing cost of the kiln, and also improving the space utilization rate in the furnace chamber in the kiln body, so that more materials can be used. may be beneficial for calcination. In addition, this design can be helpful in integrating and arranging various pipes, wires, and the like.

By dividing the furnace 4 of the kiln body into at least two kiln chambers 901 as the required number, each kiln chamber 901 can process different types of positive electrode materials, and of course the same type of positive electrode materials. can be processed at the same time, so flexibility and convenience of use thereof can be improved. For example, different kiln chambers 901 are configured to manufacture different positive electrode materials, respectively introduce process gases required for the corresponding positive electrode materials, and transport their respective positive electrode materials, thereby producing different types of positive electrode materials. Simultaneous processing can be realized. That is, by dividing the kiln chamber 901 into a plurality of relatively independent kiln chambers 901 using the isolation wall 173, the tunnel kiln of some embodiments according to the present invention can simultaneously process different types of positive electrode materials or perform different calcination processes. can

1 to 3, a rail 15 may be provided in the furnace 4 of the kiln body. The rail 15 may be installed (laid) on the bottom of the kiln chamber 901 . In an embodiment according to the present invention, the rail 15 may be installed on the inner surface of the kiln housing 28 at the bottom of the kiln chamber 901 . Through this, it is possible to avoid a phenomenon affecting the airtightness of the kiln body due to the rail 15 installed on the bottom of the kiln chamber 901 . Optionally, the length of the rails 15 may be defined such that the rails 15 are located inside the kiln body and do not extend outside the kiln body. Also, optionally, the number of rails 15 is equal to the number of kiln chambers 901, that is, a pair of rails 15 may be installed in each kiln chamber 901. Of course, in an actual application, a spare rail or the like may be separately installed in each kiln chamber 901, but this is not specifically limited here.

The kiln housing 28 may be configured to surround the outer surface of the kiln body to seal the kiln body. Structures such as through-holes and groove members may be installed in the kiln housing 28 to mount various facilities according to demand. The installed facility may be, for example, a gas injection pipe for injecting gas into the kiln chamber 901 of the kiln body, or an exhaust pipe for discharging gas from the inside of the kiln body toward the outside of the tunnel kiln. Alternatively, according to the requirement of calcination, a heating device may be installed in the kiln body. Referring to FIGS. 1 and 2 , the heating device may be, for example, an electric heater 11 inserted into the furnace chamber from the kiln housing 28 through the loop portion of the furnace wall. In actual applications, the heating device may be electrically heated through a heating stick or the like, or burn-heated through a heat radiation tube, and the heater may be a product such as a resistive heater when specifically implemented. Not specifically limited.

In addition, as a measure for improving the temperature distribution (thermal field) within the kiln body, suitable structural improvement can be made to the furnace wall of the kiln body. For example, in some embodiments, the structure of the guide groove 900 shown in FIG. 2 is formed by performing structural improvement with respect to the furnace wall at the kiln bottom (or referred to as a position close to the rail 15) of the kiln body. can do. That is, the guide groove 900 may be installed at the bottom of the furnace wall. As shown in FIGS. 5A, 6A, and 7A, the guide groove 900 is combined (combined) with the carrier so that the carrier can be isolated during the movement, thereby reducing the transfer of heat in the vertical direction and at the same time It does not interfere with normal movement.

It is desirable for the material to form a tight bond between the furnace wall and the carrier, but retain the gap required for thermal expansion. Optionally, the size of the gap may be, for example, about 15 millimeters, but of course it is not limited thereto. Depending on the actual application, the material can flexibly set the required gap for thermal expansion. At the same time, the gap forms an air curtain in the guide groove 900 by forming a pressure difference between the top and bottom of the table top of the carrier to make the gas inlet pressure at the bottom of the carrier slightly higher than the pressure in the upper space of the table top of the carrier. can Through this, it is possible to lower the waste of the table top of the carrier into the low-temperature space below the table top of the carrier in the furnace chamber. The guide groove 900 of the furnace wall may be formed by assembling a plurality of high-temperature refractory materials. An eyelet may be uniformly installed at an intermediate position of the guide groove 900 . The eyelet may contribute to enhancing the effect of the air curtain by being configured to inject a small amount of process gas.

The carrier may have a protruding structure, which is a structure that realizes isolation by combining with the guide groove 900 . Optionally, when the carrier moves on the rail 15, the driving mechanism 902 can move the carrier on the rail 15 through combination of a gear with a motor and a rack. The protruding structure may fit into the guide groove 900 shown in FIG. 2 . The cross section of the guide groove 900 may have a substantially U-shaped structure, extend along the longitudinal direction of the kiln body, and pass through the kiln body while the carrier moves. Through the arrangement of the guide groove 900 and the combination of the refractory material and the insulating material installed on the table top of the carrier, high-temperature heat from the upper part of the table top of the carrier in the furnace chamber is prevented from being transferred to the lower part of the table top of the carrier, and Heat damage to other parts installed under the table top can be prevented.

Although the airtight design of the kiln body can be realized through the structure of the kiln housing 28, when the carrier enters/exits the kiln body, impurity gas or interfering gas or non-process gas from the outside world may enter, so that the atmosphere inside the kiln body can affect the control of Considering this, one atmosphere control chamber may be installed in each of the kiln head part and the kiln tail part.

Here, the first atmosphere control chamber 24 connected to the furnace 4 through the first hermetic gate 7 may be installed on the furnace wall (kiln body) located in the kiln head part. In order to replace the gas inside the first atmosphere regulating chamber 24, as shown in FIG. 1, a hermetic gate such as an inlet hermetic gate 5 is provided at the inlet of the first atmosphere regulating chamber 24. Correspondingly, it can be installed. The first atmosphere control chamber 24 has a first internal channel, and can communicate with the kiln chamber 901 of the kiln body through the first hermetic gate 7, and of course can also be blocked from the kiln chamber 901. there is. By replacing the gas in the first atmosphere control chamber 24, the gas inside the first atmosphere control chamber 24 can be replaced with a process gas that matches the gas in the kiln chamber. Through this, when the carrier enters the kiln chamber 901 from the first atmosphere control chamber 24, impurity gas, interference gas, or non-process gas is not introduced into the kiln chamber 901. In consideration of this, the first atmosphere control chamber 24 may include a gas control system (not shown). The gas control system may be implemented through regular structures such as, for example, a vacuum, an air blower, and a ventilation channel, but the present invention is not specifically limited thereto and a detailed description thereof is omitted.

In addition, corresponding to the kiln body having a plurality of furnace chambers, as shown in FIG. 4 , the first internal channel of the first atmosphere control chamber 24 may be an independent channel. Thus, in this facility, the tunnel kiln can calcin the same type of positive electrode material in different kiln chambers 901 simultaneously. In some other embodiments, the tunnel kiln can simultaneously calcin different types of positive electrode materials in different kiln chambers 901 . In the process of simultaneously calcining different positive electrode materials in different kiln chambers 901 or simultaneously calcining the same positive electrode material, when the calcination atmospheres used in different kiln chambers 901 do not match, as shown in FIG. The first internal channel may be composed of a plurality of first sub-channels that are independent of each other, and the number of the plurality of first sub-channels may match the number of kiln chambers 901 . In this embodiment, the first atmosphere control chamber 24 may be composed of two separate control chambers (structure shown in FIG. 3). In practical implementation, the two separate control chambers may be in communication with each other.

As some beneficial improvements, the tunnel kiln may further be provided with a first conditioning chamber housing 26 that hermetically surrounds the first atmosphere adjusting chamber 24 so as to increase the airtightness of the first atmosphere adjusting chamber 24. . In addition, an end of the kiln housing 28 can be selectively connected to the first control chamber housing 26 to seal the first hermetic gate 7 so that gas leaks from the portion of the first hermetic gate 7. Respond to problems that may arise.

In addition, the carrier must enter the kiln chamber 901 of the kiln body through the first inner channel of the first atmosphere control chamber 24, and the rail 15 in the kiln body does not extend to the outside of the kiln body. Therefore, in order to smoothly transport the carrier between the outside of the tunnel kiln and the kiln body, as shown in FIG. 1, a first moving mechanism 12a may be installed in the first inner channel. The first moving mechanism 12a can move freely along the left-right direction in FIG. 1 within the first inner channel. For example, the first moving mechanism 12a may move along a direction from the first atmosphere control chamber 24 toward the kiln body, or may move along a direction from the kiln body toward the first atmosphere control chamber 24. there is. At the same time, the first moving mechanism 12a can be butt-joined with the rail 15 in the kiln body. For example, the first moving mechanism 12a may be butt-coupled with the end of the rail 15 .

In an alternative embodiment, the first moving mechanism 12a may include a guide rail and a drive facility (not shown) driven in combination with the guide rail. Therefore, the form in which the first moving mechanism 12a and the rail 15 in the kiln body are butt-coupled is a form in which the end of the guide rail and the end of the rail 15 are joined and contacted, which in substance forms a "continuous" Thus, a "movement path" for moving a carrier can be configured. After transportation of the carrier into the kiln body is completed, the first moving mechanism 12a can move to its original position. For example, it may move to the entrance of the first atmosphere control chamber 24 and wait for the next carrier outside the tunnel kiln. Further, when it is necessary to replace the gas in the first atmosphere adjusting chamber 24, the first moving mechanism 12a is moved to a predetermined position in the first inner channel, and the first moving mechanism 12a is moved. The location does not affect the closure and sealing of the airtight gates on either side of the first atmosphere conditioning chamber 24 .

The number and installation position of the first moving mechanism 12a can be adjusted correspondingly according to the different structural forms of the first inner channel of the first atmosphere regulating chamber 24 . For example, when a plurality of first sub-channels corresponding to the kiln chamber 901 of the kiln body are provided in the first internal channel of the first atmosphere control chamber 24, a plurality of first moving mechanisms ( 12a) can be placed. In other words, one first moving mechanism 12a may be provided in each first sub-channel.

In an alternative embodiment, a carrier (eg, a cart) of a container (eg, firearms 2) loaded with calcined material is moved by a first moving mechanism 12a in the first atmosphere regulating chamber 24. In order to conveniently “push” the carrier into the kiln chamber 901 of the kiln body from the first moving mechanism 12a in the first atmosphere adjusting chamber 24, the first atmosphere adjusting chamber ( 24), a carrier driving device may be further disposed. Referring to FIG. 1 , the carrier driving device may be, for example, a driving device including a general towing chain 13 and a hydraulic propeller 14 . Here, the towing chain 13 is configured to hoist the carrier outside the tunnel kiln to the first moving mechanism 12a in the first atmosphere regulating chamber 24, and the hydraulic thruster 14 is configured to lift the carrier outside the first atmosphere regulating chamber 24. ) into the kiln chamber 901 of the kiln body.

Similar to the first atmosphere control chamber 24, a second atmosphere control chamber 25 having a second inner channel may be installed in the kiln tail of the kiln body. And, the second atmosphere control chamber 25 may communicate with the furnace wall (kiln chamber 901) in the kiln tail part through the second hermetic gate 9. In order to replace the gas inside the second atmosphere control chamber 25, one hermetic gate such as, for example, the outlet hermetic gate 10 may be correspondingly installed at the outlet of the second atmosphere control chamber 25. Since the second inner channel communicates with the kiln chamber 901 of the kiln body, the carrier can enter the kiln chamber 901 from the kiln tail portion or exit from the kiln chamber 901 to the kiln tail portion. Corresponding to the usage form, the second internal channel may be one independent channel, or may be partitioned into a plurality of second sub-channels that match the number of kiln chambers 901 of the kiln body and are independent of each other.

In addition, a second moving mechanism 12b capable of butt-coupled with the rail 15 and movable at the same time may be provided in the second inner channel. The second moving mechanism 12b may be one or plural, and may be configured to move the carrier from within the kiln body. Accordingly, the number of second moving mechanisms 12b can be set according to the structural form of the second inner channel. For example, the second moving mechanism 12b may be one (corresponding to an embodiment having one second sub-channel) or may be plural (corresponding to an embodiment having a plurality of second sub-channels). corresponded). Furthermore, as described above, in order to push the carrier up to or down from the second moving mechanism 12b, two towing chains arranged in opposite directions are provided in the second atmosphere adjusting chamber 25. (13) can be installed. One of the two towing chains 13 is configured to hoist the carrier to the second moving mechanism 12b of the second atmosphere control chamber 25 within the kiln body, and the other one is configured to pull the carrier up to the second atmosphere control chamber 25. (25) It can be configured to be drawn from the inside to the outside of the tunnel kiln.

In some other embodiments, in order to improve the airtightness of the second atmosphere control chamber 25, a second control chamber housing 27 surrounding the outer surface of the second atmosphere control chamber 25 may be included. Furthermore, the connection portion between the second atmosphere control chamber 25 and the kiln tail portion of the kiln body is connected so as to be airtight through an airtight connection member, thereby solving a problem in which gas leaks through the second airtight gate 9. Regarding the above description of the second atmosphere control chamber 25, other structures not mentioned or not described in detail and their internal structures can all refer to the first atmosphere control chamber 24, so here A detailed description is omitted. In short, the airtightness of the tunnel kiln can be further improved by using an airtight housing to surround the two atmosphere control chambers. That is, the influence of interfering gas can be avoided. The connection between the kiln housing of the kiln body and the conditioning chamber housing can also improve the tightness of the tunnel kiln. For example, leakage of gas that may occur at a connection between the atmosphere control chamber and the hermetic gate of the kiln body can be avoided.

Regarding the control of the atmosphere in the calcination process, the multi-channel wheel-rail tunnel kiln according to the present invention may include an atmosphere control device. And, the atmosphere control device may mainly include a gas injection mechanism 33 and a gas discharge mechanism 101 . Here, the gas injection mechanism 33 may be configured to inject process gas into the furnace chamber of the kiln body. The gas discharge mechanism 101 may be configured to discharge waste, water vapor, and the like in the furnace chamber to the outside of the furnace chamber. For example, the gas injection mechanism 33 may include a gas injection port 32a and may be configured to inject process gas. The gas discharge mechanism 101 has a gas outlet 101a, is configured to discharge waste to the outside of the tunnel kiln, and can be combined with the exhaust channel 101 to suck waste.

In the embodiment according to the present invention, the gas injection mechanism 33 and the gas discharge mechanism 101 can independently select a position located in the multi-channel wheel-rail tunnel, and in the process of selecting the installation position, the degree of convenience of installation, The control effect of atmosphere and temperature, etc. can be considered. For example, both can control the atmosphere in all kiln chambers 901 through the furnace wall and isolation wall 173 alone.

In some embodiments, the gas inlet 32a of the gas injection mechanism 33 may be installed on the isolation wall 173, and the gas outlet 101a of the gas discharge mechanism 101 may be installed on the furnace wall. Through this, in this embodiment, the process gas can be injected from the isolation wall 173 into the furnace chamber and passed through the saggar 2 loaded with the calcined material. Waste etc. can be sucked in from the furnace wall (mainly along the width direction of the furnace wall) and discharged. And, referring to FIGS. 5A and 5B , in some disclosed embodiments, a gas distribution chamber 31 is installed in the isolation wall 173, and the gas distribution chamber 31 allows the gas of the injector 32 to pass through. It may be configured to be dispersed and sprayed through the inlet (32a).

Alternatively, in some other embodiments, the gas inlet 32a of the gas injection mechanism 33 may be installed on the furnace wall and the gas outlet 101a of the gas discharge mechanism 101 may be installed on the isolation wall 173. Through this, the process gas is ejected from the furnace wall, enters the furnace chamber, passes through the saggar 2 loaded with the calcining material, and then flows into the isolation wall 173 and is finally discharged from the furnace chamber. Through this, referring to FIGS. 6A and 6B , the injector 32 and the gas distribution chamber 31 as described above may be installed on the furnace wall (eg, the left wall 171 and the right wall 172).

Alternatively, referring to FIGS. 7A and 7B , the gas inlet 32a of the gas injection mechanism 33 is installed on the furnace wall and the isolation wall 173, respectively, and the gas outlet 101a of the gas discharge mechanism 101 is respectively It can be installed on the furnace wall and the isolation wall 173.

In some embodiments, when the gas outlet 101a of the gas outlet mechanism 101 is installed in the isolation wall 173, the gas outlet 101a may communicate with an exhaust port formed at the bottom of the kiln body. That is, as shown in FIGS. 6A and 7A, a gas channel 903 is installed at the bottom of the kiln body, and an end of the gas channel 903 may constitute an exhaust port. Since the gas outlet 101a communicates with the gas channel 903, waste can be discharged through the exhaust port of the gas channel 903.

A plurality of the gas inlet 32a of the gas injection mechanism 33 and the gas outlet 101a of the gas discharge mechanism 101 may be installed according to demand, and may be located in a suitable location in the space according to the specific size and structure of the kiln body. Arranged to realize uniform transport of process gas, while discharging waste to control temperature.

For example, the gas injection mechanism 33 may include a plurality of gas injection ports 32a formed from the bottom of the kiln to the kiln loop portion 16 along the height direction of the kiln body. In addition, these gas inlets 32a may be spaced apart in a layered manner. For convenience of description, these gas inlets 32a may be referred to as one gas injection set. That is, in the cross section of the kiln body, each gas inlet 32a in one gas injection set can be spaced apart and distributed. At the same time, the plurality of gas injection sets of the gas injection mechanism 33 may be spaced apart from each other in the longitudinal direction of the kiln body. That is, a plurality of gas injection sets may be arranged from the kiln head portion to the kiln tail portion of the kiln body. In other words, the gas injection mechanism 33 includes a plurality of gas injection sets arranged from the kiln head portion toward the kiln tail portion of the kiln body, each gas injection set including a plurality of gas injection ports 32a, and The gas inlets 32a may be distributed over the cross section of the kiln body and arranged along a direction from the kiln bottom of the kiln body toward the kiln roof portion.

Correspondingly, the gas discharge mechanism 101 may also have a similar distribution shape. That is, the gas discharge mechanism 101 may have a plurality of gas discharge sets, and each gas discharge set may be disposed along the kiln body in a direction from the kiln head portion toward the kiln tail portion. At the same time, each gas outlet set may have a plurality of gas outlets 101a. All gas outlets 101a in one gas outlet set may be arranged along a direction from the kiln bottom toward the kiln roof portion 16 in the height direction of the kiln body. In other words, the gas discharge mechanism 101 includes a plurality of gas discharge sets arranged along a direction from the kiln head portion toward the kiln tail portion of the kiln body, each gas discharge set including a plurality of gas discharge ports 101a; , The plurality of gas outlets 101a may be distributed over the cross section of the kiln body and arranged from the kiln bottom of the kiln body to the kiln roof.

In some other embodiments, each gas outlet set may share one gas outlet. In other words, the number of gas outlets provided in the plurality of gas discharge sets may be one, two, three, or a plurality.

In some embodiments, the gas inlet set may be disposed opposite the gas outlet set in the cross-section of the kiln body. For example, in the width direction of the kiln body, the gas inlet 32a and the gas outlet 101a may be installed along the same direction. For example, as shown in FIG. 6B , the axis of the gas inlet 32a and the axis of the gas outlet 101a may be collinear. Alternatively, the gas inlet 32a and the gas outlet 101a may be offset from each other at a certain distance and may not be strictly opposed.

In the above embodiment, the case where the gas inlets 32a are mainly located on the same side of the furnace wall or the isolation wall 173 has been described as an example. For example, only the gas inlet 32a is installed on the left furnace wall in the width direction of the kiln body, and only the gas inlet 32a is installed on the right furnace wall in the width direction of the kiln body, and at the same time, the isolation wall in the kiln body ( 173), only the gas outlet 101a may be installed. Alternatively, only the gas outlet 101a is installed on the left furnace wall in the width direction of the kiln body, and only the gas outlet 101a is installed on the right furnace wall in the width direction of the kiln body, and at the same time, the isolation wall 173 in the kiln body Only the gas inlet 32a may be installed. What should be explained here is that "bay installation" relates to the gas inlet 32a and the gas outlet 101a. It should be understood here that various other facilities such as a gas sensor, a temperature sensor, a damper, and the like may be installed on the isolation wall 173 and the furnace wall, but are not specifically limited thereto.

In some other embodiments of the present invention, the gas inlet 32a of the gas injection mechanism 33 and the gas outlet 101a of the gas discharge mechanism 101 may be alternately arranged in the longitudinal direction of the kiln body. For example, the furnace wall may be provided with a gas outlet (101a) as well as a gas inlet (32a), or the isolation wall may be provided with a gas outlet (101a) as well as a gas inlet (32a). It can be, and it can also combine both. More specifically, as shown in Fig. 7B, the gas injection set and the gas discharge set may be alternately disposed in the longitudinal direction of the kiln body. Alternating the gas inlet and gas outlet sets can help improve the balance of the thermal and gas flow fields of the kiln chambers within the kiln body and improve overall temperature and atmosphere consistency.

When performing the calcination process, a process gas may be injected into the kiln chamber 901 of the kiln body. The type of process gas is mainly determined by the material to be calcined, but is not specifically limited thereto.

Outside the tunnel kiln, the saggar 2 is placed so that the positive electrode material is supported and laminated on the carrier. Then, the carrier is moved to the entrance of the first atmosphere conditioning chamber 24 . The entrance hermetic gate 5 of the first atmosphere regulating chamber 24 is opened, and the first moving mechanism 12a in the first atmosphere regulating chamber 24 moves toward the inlet of the first atmosphere regulating chamber 24, The carrier is pulled up on the first moving mechanism 12a in the first atmosphere adjusting chamber 24 via the towing chain 13 . Then, the inlet airtight gate 5 is turned off and the first atmosphere control chamber 24 is closed, and the atmosphere in the first atmosphere control chamber 24 is replaced with the same atmosphere as the atmosphere in the kiln body, and then the first atmosphere control chamber 24 is closed again. The first hermetic gate 7 between the atmosphere control chamber 24 and the kiln body is opened. The first moving mechanism 12a is moved toward the kiln body and butt-coupled with the rail 15 in the kiln body. Then, the carrier and the firearms 2 are pushed up together by the hydraulic thruster 14 onto the rail 15 in the kiln body, the first moving mechanism 12a returns to the predetermined position, and the first hermetic gate for hermetic use Turn off (7). The next carrier passing through the first atmosphere control chamber 24 and entering the kiln body can push the first carrier entering the kiln body and move it forward (toward the kiln tail portion). As the carriers continuously enter the kiln body from the first atmosphere control chamber 24, the carriers that first enter the kiln body are pushed toward the kiln tail. At this time, the gas in the second atmosphere control chamber 25 is replaced with the same atmosphere as the atmosphere in the kiln body. After that, the second hermetic gate 9 for hermeticity located between the kiln main body and the second atmosphere control chamber 25 is opened, and the second moving mechanism 12b moves to the kiln tail portion, and the rail of the kiln tail portion ( 15), and again using the towing chain 13, the carrier of the kiln tail part is pulled up onto the second moving mechanism 12b in the second atmosphere adjusting chamber 25. Then, the 2nd moving mechanism 12b moves to the exit position of the 2nd atmosphere adjusting chamber 25, and turns off the 2nd hermetic gate 9. The exit hermetic gate 10 of the second atmosphere regulating chamber 25 is opened, and the carrier is pulled out again through another towing chain 13, and finally the exit hermetic gate 10 is turned off, and the second atmosphere Gas exchange is performed with respect to the control chamber 25, and the next carrier waits for entry.

Taken together, the tunnel kiln according to the present invention has at least the following main advantages.

First, in the tunnel kiln according to the present invention, the kiln head part and the kiln tail part of the kiln body are communicated with the atmosphere control chamber through the airtight gates, respectively. Therefore, when the material is transported, the atmosphere is adjusted in the two atmosphere control chambers and then the material enters or is taken out of the kiln body again, so unnecessary gas (e.g., impurity gas) in the process of transporting the material ) can be prevented from entering the kiln body. At the same time, the kiln housing can block interference with the atmosphere inside the kiln body from outside by sealing the kiln body.

The multi-channel wheel-rail tunnel kiln can have higher production capacity by combining a structural design that blocks the influence of interfering gases and a structural design that transports materials with high efficiency. In addition, since it is equipped with a plurality of channels, when an unexpected accident occurs within one channel, when production must be stopped and maintenance is performed, it does not affect the normal production of the other channel, resulting in loss of productivity this could be less. And, the multi-channel wheel-rail tunnel kiln may be applied to synchronously carry out calcination treatment for different materials, and processing such as mixing may be directly performed for such different materials in a subsequent step. That is, by performing the calcination treatment in parallel, it is possible to effectively overcome the problem of low efficiency of the calcination treatment in a single row.

Optionally, by using an airtight housing to surround the two atmosphere control chambers, the airtightness of the tunnel kiln can be further improved and, for example, the effects of interfering gases can be avoided. The airtightness of the tunnel kiln can also be improved by connecting the kiln housing surrounding the kiln body with the control chamber housing. For example, it is possible to avoid leakage of gas that may occur at a junction between the atmosphere control chamber and the hermetic gate of the kiln body.

Optionally, the internal channels of the atmosphere control chamber are correspondingly installed as a plurality of separate sub-channels according to the structural form of the kiln chamber of the kiln body, so that calcination can be performed in different channels according to different calcination requirements as needed. there is. For example, different atmospheres can be injected into different kiln chambers to calcin different materials.

Optionally, since two adjacent kiln chambers share one isolation wall, the number of installations of the isolation wall can be reduced, thereby reducing the manufacturing cost of the kiln furnace and the space utilization rate in the furnace chamber of the kiln body. It can be advantageous to calcine more materials by improving At the same time, this design can be helpful in integrating and arranging various pipes, wires, etc.

Optionally, the gas injection set and the gas discharge set may be alternately arranged in the longitudinal direction of the kiln body as shown in FIG. 7B. Alternating gas inlet sets and gas outlet sets can help improve the balance of the thermal and gas flow fields within the kiln chamber of the kiln body and improve overall temperature and atmosphere consistency.

Optionally, a guide groove is installed on the furnace wall, and the high-temperature heat in the furnace chamber of the upper table top of the carrier is transferred to the lower portion of the table top of the carrier through the arrangement of the guide groove and the combination of the refractory material and the insulating material installed on the table top of the carrier. It is possible to prevent thermal damage to other parts installed under the table top of the carrier by preventing the carrier from being damaged.

What should be explained here is that in the above description of the present invention, the orientation or positional relationship indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside” is shown in the drawings. It is the orientation or positional relationship shown, or the orientation or positional relationship habitually arranged when using the product of the present invention. This is for convenience of description and brief description of the present invention, and does not necessarily indicate or imply that the indicated device or component is configured and operated in a specific orientation with a specific orientation, so as to limit the present invention. don't understand In addition, terms such as "first" and "second" are intended to be distinguished and described, and should not be understood as indicating or implying relative importance.

In the description of the present invention, what should be further explained is that terms such as "installation", "mounting", "communication", and "connection" should be understood in a broad sense, unless otherwise specified and limited. For example, it may be a fixed connection, a detachable connection, or an integral connection, or a mechanical connection or an electrical connection, or may be directly connected, or may be indirectly connected through an intermediate medium, and two components Communication between the insides may be possible. For a person skilled in the art to which the present invention belongs, specific meanings of the above terms in the present invention may be understood according to specific circumstances.

In the present invention, the embodiments and features of all embodiments of the present invention can be combined with each other under the premise that they are not contradictory or conflicting. In the present invention, conventional equipment, devices, parts, etc. may be commercially available and may be manufactured according to the contents described in the present invention. In the present invention, in order to highlight the main points of the present invention, some routine operations and facilities, devices and components may be omitted, or only briefly described thereof.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art to which the present invention belongs can make various modifications and changes to the present invention. You will understand. All modifications, equivalent replacements, improvements, etc. made within the scope of the spirit and principle of the present invention are, of course, included in the protection scope of the present invention.

2 - saggarette; 4 - no; 5 - entrance confidential gate; 7-first confidential gate; 9-second hermetic gate; 10 - exit confidential gate; 11 - electric heater; 12a-first moving mechanism; 12b-second moving mechanism; 13 - towing chain; 14 - hydraulic thruster; 15 - rail; 16-kiln loop portion; 24 - first atmosphere control chamber; 25-second atmosphere control chamber; 26 - first conditioning chamber housing; 27 - second conditioning chamber housing; 28 - kiln housing; 31 - gas distribution chamber; 32 - injector; 32a - gas inlet; 33-gas injection mechanism; 101-gas discharge mechanism; 101a - gas outlet; 171 - left wall; 172 - right wall; 173 - partition wall; 900 - guide groove; 901 - kiln chamber; 902-drive mechanism; 903 - gas channel.

Claims (17)

As a multi-channel wheel-rail tunnel kiln,
A kiln body having a furnace wall, an isolation wall and a rail, the furnace wall defining a furnace and partitioned by the isolation wall into at least two kiln chambers corresponding to the rails one-to-one, the rails comprising the kiln chamber A kiln body located inside the;
A first atmosphere regulating chamber having a first inner channel, the first atmosphere regulating chamber being connected to the furnace wall at a kiln head through a first hermetic gate, wherein the first inner channel is connected to the furnace wall through the first hermetic gate a first atmosphere control chamber selectively communicated with or isolated from the at least two kiln chambers;
A second atmosphere control chamber having a second inner channel, the second atmosphere control chamber is connected to the furnace wall through a second hermetic gate at the kiln tail, and the second inner channel is connected to the furnace wall through the second hermetic gate. a second atmosphere control chamber selectively communicated with or isolated from the at least two kiln chambers;
a kiln housing airtightly surrounding the kiln body; and
A gas injection mechanism and a gas discharge mechanism are provided for interlockingly controlling the atmosphere in the at least two kiln chambers, and the gas injection mechanism and the gas discharge mechanism are independently installed on the furnace wall and/or the isolation wall to control the atmosphere. A multi-channel wheel-rail tunnel kiln comprising a device. According to claim 1,
The tunnel kiln,
a first conditioning chamber housing airtightly surrounding the first atmosphere conditioning chamber; and
A multi-channel wheel-rail tunnel kiln comprising a second control chamber housing airtightly surrounding the second atmosphere control chamber. According to claim 2,
The multi-channel wheel-rail tunnel kiln, characterized in that both ends of the kiln housing are in airtight communication with the first control chamber housing and the second control chamber housing, respectively. According to any one of claims 1 to 3,
In the first inner channel, a first movable mechanism is provided with a movable butt-coupled with the rail; and/or
A multi-channel wheel-rail tunnel kiln, characterized in that, in the second inner channel, a second moving mechanism movable by butt-coupled with the rail is provided. According to any one of claims 1 to 4,
the first internal channels are a plurality of first sub-channels identical to the number of the at least two kiln chambers and independent of each other; and/or
The multi-channel wheel-rail tunnel kiln, characterized in that the second inner channel is a plurality of second sub-channels that correspond to the number of the at least two kiln chambers and are independent of each other. According to claim 5,
A movable first moving mechanism coupled to the rail by butt is provided in the first inner channel, and the first moving mechanism includes a plurality of first sub-moving mechanisms respectively located in the plurality of first sub-channels; ; and/or
A movable second moving mechanism is provided in the second inner channel by butt-coupled with the rail, and the second moving mechanism includes a plurality of second sub-moving mechanisms respectively positioned in the plurality of second sub-channels. Characterized in that the multi-channel wheel-rail tunnel kiln. According to any one of claims 1 to 6,
a gas inlet of the gas injection mechanism is installed in the isolation wall, and a gas outlet of the gas discharge mechanism is installed in the furnace wall; or
a gas inlet of the gas injection mechanism is installed on the furnace wall, and a gas outlet of the gas discharge mechanism is installed on the isolation wall; or
A multi-channel wheel-rail tunnel kiln, characterized in that the gas inlet of the gas injection mechanism is installed on the furnace wall and the isolation wall, respectively, and the gas outlet of the gas discharge device is installed on the furnace wall and the isolation wall, respectively. According to claim 7,
The multi-channel wheel-rail tunnel kiln, characterized in that, when the gas outlet of the gas outlet mechanism is located on the isolation wall, the gas outlet communicates with an exhaust port formed at the bottom of the kiln body. According to claim 7,
The gas injection mechanism includes a plurality of gas injection sets arranged from the kiln head portion toward the kiln tail portion of the kiln body;
the plurality of gas injection sets each include a plurality of gas injection ports distributed in the cross section of the kiln body and arranged from the kiln bottom of the kiln body toward the kiln roof; and/or
The gas discharge mechanism includes a plurality of gas discharge sets arranged from the kiln head portion toward the kiln tail portion of the kiln body;
The multi-channel wheel-rail tunnel kiln, characterized in that the plurality of gas outlet sets each include a plurality of gas outlets distributed in the cross section of the kiln body and arranged from the kiln bottom of the kiln body toward the kiln roof portion. According to claim 9,
the gas injection set and the gas discharge set are disposed oppositely in an end face of the kiln body; and/or
The gas injection set of the gas injection mechanism and the gas discharge set of the gas discharge mechanism are disposed alternately on the isolation wall or furnace wall on the same side along the direction from the kiln head portion to the kiln tail portion of the kiln body, respectively. Features multi-channel wheel-rail tunnel kilns. According to any one of claims 1 to 10,
In the furnace wall, a guide groove is installed at the kiln bottom of the kiln body,
The guide groove is configured to fit a carrier moving in the multi-channel wheel-rail tunnel kiln, and/or
The multi-channel wheel-rail tunnel kiln, characterized in that the at least two adjacent kiln chambers are configured to share one of the isolation walls. According to claim 11,
The multi-channel wheel-rail tunnel kiln, characterized in that the carrier has a protrusion structure fit into the guide groove. According to claim 12,
The cross section of the guide groove is U-shaped,
The multi-channel wheel-rail tunnel kiln, characterized in that the guide groove is disposed extending from the kiln head portion toward the kiln tail portion of the kiln body. According to any one of claims 11 to 13,
A multi-channel wheel-rail tunnel kiln, characterized in that the eyelets are uniformly distributed on the guide groove. According to any one of claims 7 to 10,
A gas distribution chamber and an injector are installed on the isolation wall,
The gas distribution chamber is a multi-channel wheel-rail tunnel kiln, characterized in that the gas passes through the gas inlet and at the same time injects the gas through the injector in a distributed manner. According to any one of claims 1 to 15,
A multi-channel wheel-rail tunnel kiln, characterized in that a carrier driving device is installed in each of the first atmosphere control chamber and the second atmosphere control chamber. According to claim 16,
The multi-channel wheel-rail tunnel kiln, characterized in that the carrier driving device includes a towing chain and a hydraulic propeller.

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