Air intake and exhaust system of ternary positive electrode material sintering kiln

Abstract

The utility model relates to the field of ternary positive electrode material sintering kilns, and discloses an air intake and exhaust system of a ternary positive electrode material sintering kiln, which comprises an atmosphere sintering furnace body, the upper part and the side part of the furnace wall of the atmosphere sintering furnace body are respectively provided with an upper air intake preheating groove and a side air intake preheating groove; a plurality of first air inlets leading into the atmosphere sintering furnace body are formed in the side, close to a hearth, in the upper air inlet preheating groove, a plurality of second air inlets leading into the atmosphere sintering furnace body are formed in the side, close to the hearth, in the side air inlet preheating groove, and a plurality of exhaust ports are formed in the bottom of the atmosphere sintering furnace body. The utility model aims to solve the problems of poor product uniformity, high residual alkali content and large hearth atmosphere fluctuation in multi-layer sagger sintering.

Description

Technical Field

[0001] The utility model relates to the field of ternary positive electrode material sintering kilns, and in particular to an air intake and exhaust system of a ternary positive electrode material sintering kiln. Background Art

[0002] The solid-phase method is to synthesize ternary positive electrode materials by high-temperature calcination. It has the advantages of simple operation, no waste liquid discharge, low production cost, etc., and is easy to be put into industrial production.

[0003] At present, the air intake and exhaust system of the atmosphere sintering furnace is generally set to have bottom and side air intake, and an exhaust port is set at the top for exhaust. In order to increase production capacity and reduce costs in industry, the saggers are usually stacked in multiple rows for sintering. The sintering process of the ternary positive electrode material is a process that consumes a large amount of air or oxygen and discharges a large amount of water vapor and strong alkaline waste gas. The disadvantage of the current atmosphere sintering furnace air intake and exhaust system is that the materials in the middle and lower layers are not in sufficient contact with the air or oxygen, and the waste gas generated cannot be discharged in time, which increases the residual alkali of the material and reduces the uniformity of the product. In addition, during the heating stage of solid-phase sintering, the precursor reacts with the lithium source to produce a large amount of water vapor, which is easily condensed into small water droplets and falls into the furnace and the material after encountering the exhaust port above. The strong alkalinity will also corrode the exhaust port pipe, affecting the exhaust effect and life of the sintering furnace. Summary of the invention

[0004] In view of the problems existing in the prior art, the utility model provides an air intake and exhaust system for a ternary positive electrode material sintering kiln, which aims to solve the problems of poor product uniformity, high residual alkali and large fluctuations in furnace atmosphere caused by multi-layer sagger sintering.

[0005] In order to solve the above technical problems, the utility model is implemented through the following technical solutions:

[0006] A ternary positive electrode material sintering furnace air intake and exhaust system comprises an atmosphere sintering furnace body, wherein an upper air intake preheating groove and a side air intake preheating groove are respectively arranged on the upper part and the side part of the furnace wall of the atmosphere sintering furnace body, a plurality of first air intake ports leading to the atmosphere sintering furnace body are opened in the upper air intake preheating groove close to the furnace side, a plurality of second air intake ports leading to the atmosphere sintering furnace body are opened in the side air intake preheating groove close to the furnace side, and a plurality of exhaust ports are opened at the bottom of the atmosphere sintering furnace body.

[0007] Furthermore, the upper air intake preheating tank is connected to a first air intake pipe, and the first air intake pipe is provided with a first air intake flow meter.

[0008] Furthermore, the side air intake preheating tank is connected to a second air intake pipe, and the second air intake pipe is provided with a second air intake flow meter.

[0009] Furthermore, a plurality of the second air inlets are vertically distributed on the side of the atmosphere sintering furnace body and correspond to the multi-layered saggers in the atmosphere sintering furnace body.

[0010] Furthermore, the exhaust port is connected to an exhaust pipe, and the end of the exhaust pipe is connected to an exhaust device.

[0011] Furthermore, a regulating valve is provided on the exhaust pipe.

[0012] Furthermore, a plurality of the first air inlets are evenly distributed above the atmosphere sintering furnace body.

[0013] Compared with the prior art, the utility model has at least the following beneficial effects:

[0014] The utility model provides an intake and exhaust system for a ternary positive electrode material sintering kiln. Gas enters the sintering furnace body from the top and the side, fully reacts with the materials in the stacked saggers in the sintering furnace body, and the generated water vapor and exhaust gas are discharged from the exhaust port below. The water droplets condensed by the water vapor and the oxides at the exhaust port are discharged from the bottom and will not fall back into the furnace, ensuring that the materials will not be contaminated. At the same time, the material dust volatilized from the sagger inside the furnace will be driven by the gas to fall back into the sagger, thereby improving the yield of the product. Compared with the traditional atmosphere sintering furnace intake and exhaust system, it effectively solves the problems of poor product uniformity, high residual alkali, and large fluctuations in the furnace atmosphere caused by multi-layer sagger sintering.

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 This is a schematic diagram of the air intake and exhaust system of a ternary positive electrode material sintering kiln of the utility model.

[0018] In the figure: 11-atmosphere sintering furnace body; 12-first air inlet; 13-upper air inlet preheating tank; 14-first air inlet pipe; 15-first air inlet flowmeter; 16-sagger; 17-second air inlet; 18-side air inlet preheating tank; 19-second air inlet pipe; 20-second air inlet flowmeter; 21-exhaust port; 22-exhaust pipe; 23-regulating valve; 24-exhaust device. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1 As shown, the embodiment of the utility model provides an air intake and exhaust system for a ternary positive electrode material sintering kiln, including an atmosphere sintering furnace body 11, an upper air intake preheating groove 13 and a side air intake preheating groove 18 are respectively arranged on the upper part and the side of the furnace wall of the atmosphere sintering furnace body 11, and a plurality of first air intake ports 12 leading to the atmosphere sintering furnace body 11 are opened in the upper air intake preheating groove 13 near the furnace side. After the air enters the upper air intake preheating groove 13 for preheating, it enters the atmosphere sintering furnace body 11 through the first air intake ports 12. A plurality of second air intake ports 17 leading to the atmosphere sintering furnace body 11 are opened in the side air intake preheating groove 18 near the furnace side. After the air enters the side air intake preheating groove 18 for preheating, it enters the atmosphere sintering furnace body 11 through the second air intake ports 17. A plurality of exhaust ports 21 are opened at the bottom of the atmosphere sintering furnace body 11, and the waste gas generated by sintering is discharged from the atmosphere sintering furnace body 11 through the exhaust ports 21.

[0021] Specifically, by arranging the first air inlet 12 and the second air inlet 17 above and on the side of the atmosphere sintering furnace body 11 respectively, the gas can fully contact and react with the materials in the upper and lower saggers 16 in the furnace of the atmosphere sintering furnace body 11 after entering the furnace, and the generated water vapor and exhaust gas are discharged through the exhaust port 21. The temperature at the front end of the reaction is relatively low. The exhaust port 21 is located at the bottom of the atmosphere sintering furnace body 11. The generated water vapor condenses into water droplets when it is cooled and is discharged through the exhaust port 21, which effectively avoids falling back into the furnace to pollute the materials. The material dust in the furnace falls back into the sagger 16 through the downward exhaust part, which improves the yield of the product to a certain extent.

[0022] On the basis of the above embodiments, as a more preferred embodiment, Figure 1 As shown, the upper air intake preheating tank 13 is connected to a first air intake pipe 14, and a first air intake flow meter 15 is provided on the first air intake pipe 14. Specifically, air is sent into the upper air intake preheating tank 13 through the first air intake pipe 14, and the first air intake flow meter 15 is used to monitor the air intake flow in real time, so as to effectively control the air intake.

[0023] In one embodiment, if Figure 1As shown, a second air intake pipe 19 is connected to the side air intake preheating tank 18, and a second air intake flow meter 20 is provided on the second air intake pipe 19. Similarly, air is sent into the side air intake preheating tank 18 through the second air intake pipe 19, and the second air intake flow meter 20 is used to monitor the air intake flow in real time, so as to effectively control the air intake flow, ensure the pressure and oxygen content in the furnace, reduce oxygen consumption, and reduce production costs.

[0024] In one embodiment, if Figure 1 As shown, a plurality of second air inlets 17 are vertically distributed on the side of the atmosphere sintering furnace body 11 and correspond to the multi-layered saggers 16 in the atmosphere sintering furnace body 11 , which is conducive to the rapid and sufficient entry of gas into the saggers 16 for reaction.

[0025] In one embodiment, if Figure 1 As shown, the exhaust port 21 is connected to an exhaust pipe 22, and the end of the exhaust pipe 22 is connected to an exhaust device 24. Exemplarily, the exhaust device 24 is a three-stage exhaust device.

[0026] Specifically, the exhaust pipe 22 is connected to each exhaust port 21 through a branch pipe, and the exhaust gas discharged from the exhaust port 21 enters the exhaust pipe 22 and is exhausted by the exhaust device 24. After the water vapor generated by sintering passes through the exhaust port 21, it condenses into water droplets when it is cooled in the exhaust pipe 22 below and is discharged.

[0027] Better, such as Figure 1 As shown, a regulating valve 23 is provided on the exhaust pipe 22 , and the exhaust volume is controlled by adjusting the opening of the regulating valve 23 . Exemplarily, the regulating valve 23 can be a plug plate provided on the exhaust pipe 22 .

[0028] In one embodiment, if Figure 1 As shown, a plurality of first air inlets 12 are evenly distributed above the atmosphere sintering furnace body 11 , ensuring that the gas enters the atmosphere sintering furnace body 11 more evenly from above.

[0029] It should be noted that the upper air inlet preheating groove 13 is embedded in the upper furnace wall of the atmosphere sintering furnace body 11, the first air inlet 12 is evenly distributed below the upper air inlet preheating groove 13, that is, the inner wall above the atmosphere sintering furnace body 11, and the first air inlet pipe 14 and the first air inlet flowmeter 15 are sequentially connected to the upper part of the upper air inlet preheating groove 13, that is, the outer wall above the atmosphere sintering furnace body 11. The side air inlet preheating groove 18 is embedded in the side furnace wall of the atmosphere sintering furnace body 11, the second air inlet 17 is arranged on the inner side of the side air inlet preheating groove 18 close to the furnace and parallel to the placed sagger 16, the second air inlet pipe 19 and the second air inlet flowmeter 20 are sequentially connected to the outer side of the side air inlet preheating groove 18, that is, the outer walls on both sides of the atmosphere sintering furnace body 11.

[0030] It should be understood that the atmosphere sintering furnace 11 is not limited to a sealed atmosphere sintering furnace, but may also be a non-sealed atmosphere sintering furnace. The atmosphere used by the atmosphere sintering furnace 11 is one or more of oxygen, air, and inert gas. The saggers 16 in the atmosphere sintering furnace 11 are not limited to double-layer four-row.

[0031] In this embodiment, air inlets with adjustable flow rates are arranged on the top and the side, that is, an air intake and exhaust method of upper-in and lower-exhaust is adopted. The air intake flowmeter and the plug plate can effectively adjust the air intake and exhaust, so that the incoming gas can fully react with the material in the sagger while ensuring the pressure and oxygen content in the atmosphere sintering furnace, reducing oxygen consumption and reducing production costs; in addition, an exhaust port is arranged below the atmosphere sintering furnace body, so that a large amount of water vapor generated is condensed below the furnace, and the generated water droplets and oxides generated by corrosion of the exhaust port are discharged from below, which will not cause pollution to the material in the sagger, and effectively avoid the falling back of condensates and oxides during the sintering process, reducing material pollution and dust, and at the same time, part of the volatilized dust is driven by the airflow to fall back to the sagger, thereby improving the yield of the product.

[0032] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly defined and limited, the terms "connected", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the utility model, which are used to illustrate the technical solution of the utility model, rather than to limit it. The protection scope of the utility model is not limited thereto. Although the utility model is described in detail with reference to the above-mentioned embodiments, ordinary technicians in this field should understand that any technician familiar with the technical field can still modify the technical solution recorded in the above-mentioned embodiments within the technical scope disclosed by the utility model, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiment of the utility model, and should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the protection scope of the claims.

Claims

1. An air intake and exhaust system for a ternary cathode material sintering furnace, characterized in that: The invention comprises an atmosphere sintering furnace body (11), wherein an upper air inlet preheating groove (13) and a side air inlet preheating groove (18) are respectively arranged on the upper part and the side part of the furnace wall of the atmosphere sintering furnace body (11); a plurality of first air inlets (12) leading to the atmosphere sintering furnace body (11) are arranged in the upper air inlet preheating groove (13) on the side close to the furnace chamber; a plurality of second air inlets (17) leading to the atmosphere sintering furnace body (11) are arranged in the side air inlet preheating groove (18) on the side close to the furnace chamber; and a plurality of exhaust ports (21) are arranged at the bottom of the atmosphere sintering furnace body (11).

2. The inlet and outlet system of a ternary cathode material sintering furnace according to claim 1, characterized in that: The upper air intake preheating tank (13) is connected to a first air intake pipe (14), and the first air intake pipe (14) is provided with a first air intake flow meter (15).

3. The exhaust system for a ternary cathode material sintering furnace according to claim 1, characterized in that: The side air intake preheating tank (18) is connected to a second air intake pipe (19), and the second air intake pipe (19) is provided with a second air intake flow meter (20).

4. The exhaust system for a ternary cathode material sintering furnace according to claim 1, characterized in that: A plurality of the second air inlets (17) are vertically distributed on the side of the atmosphere sintering furnace body (11), and correspond to the multi-layered saggers (16) in the atmosphere sintering furnace body (11).

5. The exhaust system for a ternary cathode material sintering furnace according to claim 1, characterized in that: The exhaust port (21) is connected to an exhaust pipe (22), and the end of the exhaust pipe (22) is connected to an exhaust device (24).

6. The exhaust system for a ternary cathode material sintering furnace according to claim 5, characterized in that: The exhaust pipe (22) is provided with a regulating valve (23).

7. The inlet and outlet system of a ternary cathode material sintering furnace according to claim 1, characterized in that: A plurality of the first air inlets (12) are evenly distributed above the atmosphere sintering furnace body (11).

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