A pretreatment device for gas detection of lithium battery positive electrode material roller kiln

Abstract

The utility model discloses a kind of pretreatment device of lithium battery positive electrode material roller kiln gas detection, it is related to lithium battery positive electrode material sintering equipment technical field, including air inlet and air outlet, air inlet and air outlet between being provided with pretreatment mechanism, pretreatment mechanism includes dust separation component, dust separation component is fixedly connected to one end of air inlet, and dust separation component is used to separate dust in gas, condensation drainage component is connected to the output end of dust separation component, and condensation drainage component is used to discharge condensate of gas condensation, water vapor separation component is connected to the end of condensation drainage component, water vapor separation component is used to carry out water vapor separation, exhaust component is connected to one end of water vapor separation component.The utility model passes through air inlet into gas, gas passes through dust filter component, to utilize dust filter component to carry out step-by-step filtration to powder in gas, to remove dust in gas, while high-temperature resistant and have good corrosion resistance.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium battery cathode material sintering equipment, and in particular to a pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials. Background Technology

[0002] Currently, during the sintering of lithium-ion battery cathode materials (such as ternary materials and lithium cobalt oxide) in roller kilns, the gas inside the kiln exhibits the following characteristics: high temperature and high humidity (gas temperature reaches 100-150℃, humidity exceeds 90%RH); complex dust: containing submicron-sized metal oxide particles (particle size 2-5μm) and binder volatiles; and fluctuating flow rate: changes in negative pressure inside the kiln cause unstable gas flow rate (±30% of the set value). Existing pretreatment systems suffer from incomplete dust interception, condensate retention, and low drying efficiency, resulting in large errors in oxygen analyzers (above ±5.0%) and short sensor lifespans.

[0003] The above problems are mainly manifested in the following aspects:

[0004] (1) Single-stage filters cannot simultaneously achieve high temperature resistance and ultrafine dust interception;

[0005] (2) Ordinary stainless steel condensation devices, if the condensate is not drained in time, are prone to backflow and corrosion of the equipment;

[0006] (3) Lack of flow feedback adjustment, gas flow rate fluctuations interfere with the detection results;

[0007] Therefore, we propose a pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials. Utility Model Content

[0008] The purpose of this invention is to provide a pretreatment device for gas detection in a roller kiln for lithium battery cathode materials, so as to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a pretreatment device for gas detection in a roller kiln for lithium battery cathode materials, comprising an inlet and an outlet, wherein a pretreatment mechanism is provided between the inlet and the outlet, the pretreatment mechanism comprising:

[0010] A dust separation component is fixedly connected to one end of the air inlet and is used to separate dust from the gas.

[0011] A condensate drainage component is connected to the output end of the dust separation component and is used to discharge the condensate water condensed from the gas.

[0012] A water vapor separation component is connected to the end of a condensate drain component and is used to separate water vapor.

[0013] An exhaust assembly is connected to one end of a water vapor separator and is used to discharge gas. The exhaust assembly is connected to one end of an outlet.

[0014] Preferably, the dust separation component includes:

[0015] A stainless steel dust filter, wherein the stainless steel dust filter is fixedly connected to the end of the air inlet;

[0016] A vacuum filter is fixedly connected to one end of a stainless steel dust filter, and the vacuum filter is also fixedly connected to a condensate drainage assembly.

[0017] Preferably, the condensate drainage assembly includes:

[0018] An electronic condenser, which is fixedly connected to one end of a vacuum filter;

[0019] A drain pump is fixedly connected to the drain port of the electronic condenser.

[0020] Preferably, the water vapor separation component includes:

[0021] A water vapor separator, wherein the water vapor separator is fixedly connected to one end of an electronic condenser;

[0022] A drying tube is fixedly connected to one end of a water vapor separator.

[0023] Preferably, the exhaust assembly includes:

[0024] An air pump, which is fixedly connected to one end of the drying tube;

[0025] A flow meter is installed on the connecting pipe between the air pump and the air outlet.

[0026] Preferably, the electronic condenser is a gas condenser with a semiconductor cooling chip, and the drain pump and the water vapor separator are controlled in conjunction with each other by a liquid level sensor.

[0027] The technical effects and advantages of this utility model are as follows:

[0028] This invention introduces gas through an inlet, which then passes through a dust filter assembly. This dust filter assembly progressively filters the powder in the gas, removing dust while maintaining high temperature resistance and good corrosion resistance. The gas then enters a condensate drainage assembly, where it is condensed, and the condensate is discharged. Next, the gas enters a water vapor separation assembly to reduce humidity. Finally, the gas is discharged through an exhaust assembly, exiting through an outlet. This exhaust assembly can adjust the exhaust flow according to the gas flow rate, ensuring a relatively constant flow and avoiding interference with test results. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0030] Figure 1 This is a schematic diagram of the planar structure of this utility model.

[0031] In the attached image:

[0032] 1. Air inlet; 2. Stainless steel dust filter; 3. Vacuum filter; 4. Drain pump; 5. Electronic condenser; 6. Water vapor separator; 7. Drying tube; 8. Air pump; 9. Flow meter; 10. Air outlet. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model provides, for example Figure 1The device shown is a pretreatment apparatus for detecting gas in a roller kiln for lithium-ion battery cathode materials. It includes an inlet 1 and an outlet 10, with a pretreatment mechanism positioned between them. The pretreatment mechanism includes a dust separation component fixedly connected to one end of the inlet 1 for separating dust from the gas; a condensate drainage component connected to the output end of the dust separation component for discharging condensate from the gas; a water vapor separation component connected to the end of the condensate drainage component for separating water vapor; and an exhaust component. Connected to one end of the water vapor separation component, and the exhaust component is used to discharge gas, the exhaust component is connected to one end of the outlet 10; gas enters through the inlet 1, the gas passes through the dust filter component, thereby using the dust filter component to filter the powder in the gas step by step, thereby removing the dust in the gas, and then the gas enters the condensate drainage component, thereby condensing the gas and discharging the condensate water from the gas, and then the gas enters the water vapor separation component, thereby reducing the humidity of the gas, and finally the gas is discharged through the exhaust component, and then discharged from the outlet 10.

[0035] An oxygen analyzer is connected to the end of the outlet 10. The oxygen analyzer is used to measure the oxygen content in the gas. A one-way check valve is installed on the connecting pipe between the outlet 10 and the oxygen analyzer to prevent gas backflow.

[0036] Preferably, the dust separation component includes a stainless steel dust filter 2, which is fixedly connected to the end of the air inlet 1, and a vacuum filter 3 is fixedly connected to one end of the stainless steel dust filter 2, and the vacuum filter 3 is fixedly connected to the condensate drainage component; primary dust filtration is performed by the stainless steel dust filter 2, and secondary dust filtration is performed by the vacuum filter 3, thereby achieving the step-by-step filtration purpose of the dust separation component. The stainless steel dust filter 2 is made of 304 stainless steel, which greatly improves its heat resistance, and adopts a sintered mesh form with an internal filter element filtration accuracy of 2μm. The vacuum filter 3 adopts a non-metallic filter element with a pore size of 1μm, and uses vacuum negative pressure to adsorb ultrafine dust.

[0037] Preferably, the condensate drainage assembly includes an electronic condenser 5, which is fixedly connected to one end of the vacuum filter 3, and a drain pump 4 is fixedly connected to the drain port of the electronic condenser 5. After the gas exits from the vacuum filter 3, it enters the electronic condenser 5, where the water vapor in the gas is condensed to form condensate, which is then discharged through the drain pump 4. The electronic condenser 5 is divided into: a first-stage air-cooled heat exchanger that uses the waste heat of the kiln to preheat the fresh air, reducing the gas temperature from 150°C to 80°C; a second-stage semiconductor refrigeration tube that forces the temperature down to 40-50°C below the dew point, causing water vapor to condense; and a third-stage spiral condenser tube that extends the gas residence time and improves the condensation effect.

[0038] Preferably, the water vapor separation assembly includes a water vapor separator 6, which is fixedly connected to one end of the electronic condenser 5, and a drying tube 7 is fixedly connected to one end of the water vapor separator 6. The electronic condenser 5 is a gas condenser using a semiconductor cooling chip, and the drain pump 4 is linked to the water vapor separator 6 through a liquid level sensor. After the gas comes out of the electronic condenser 5, it enters the water vapor separator 6 for water vapor separation, thereby reducing the gas humidity, and then enters the drying tube 7 to further reduce the gas humidity. Liquid level linkage control: condensate is collected into a water storage tank through an inclined guide channel on the water vapor separator 6. The water level in the water storage tank is collected by a liquid level sensor, thereby triggering the drain pump 4 to automatically discharge. The water vapor separator 6 separates water vapor by centrifugation, and the drying tube 7 adopts a double-tower adsorption structure and is filled with silica gel-molecular sieve composite desiccant.

[0039] Preferably, the exhaust assembly includes an air pump 8, which is fixedly connected to one end of the drying tube 7, and a flow meter 9 is installed on the connecting pipe between the air pump 8 and the air outlet 10; the flow meter 9 provides feedback on the gas flow rate, thereby controlling the power of the air pump 8 to maintain a constant gas flow.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials, comprising an inlet (1) and an outlet (10), characterized in that, A pretreatment mechanism is provided between the air inlet (1) and the air outlet (10), the pretreatment mechanism comprising: A dust separation component is fixedly connected to one end of the air inlet (1) and is used to separate dust from the gas. A condensate drainage component is connected to the output end of the dust separation component and is used to discharge the condensate water condensed from the gas. A water vapor separation component is connected to the end of a condensate drain component and is used to separate water vapor. An exhaust assembly is connected to one end of a water vapor separation assembly and is used to discharge gas. The exhaust assembly is connected to one end of an outlet (10).

2. The pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials according to claim 1, characterized in that, The dust separation component includes: A stainless steel dust filter (2) is fixedly connected to the end of the air inlet (1); Vacuum filter (3) is fixedly connected to one end of stainless steel dust filter (2), and vacuum filter (3) is fixedly connected to condensate drainage assembly.

3. The pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials according to claim 1, characterized in that, The condensate drainage assembly includes: An electronic condenser (5) is fixedly connected to one end of a vacuum filter (3); A drain pump (4) is fixedly connected to the drain port of the electronic condenser (5).

4. The pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials according to claim 3, characterized in that, The water vapor separation component includes: A water vapor separator (6) is fixedly connected to one end of an electronic condenser (5); Drying tube (7) is fixedly connected to one end of water vapor separator (6).

5. The pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials according to claim 4, characterized in that, The exhaust assembly includes: An air pump (8) is fixedly connected to one end of a drying tube (7); Flow meter (9), which is installed on the connecting pipe between air pump (8) and air outlet (10).

6. The pretreatment device for detecting gas in a roller kiln for lithium battery cathode materials according to claim 4, characterized in that, The electronic condenser (5) is a gas condenser using a semiconductor cooling chip, and the drain pump (4) and the water vapor separator (6) are controlled in conjunction with each other by a liquid level sensor.

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