A reaction kettle oxygen concentration detection device

Abstract

This invention provides an oxygen concentration detection device for a reaction vessel, comprising an air pretreatment unit, a reaction unit, a first gas flow meter, a water washing unit, a sampling pump, a second gas flow meter, and an oxygen sensor. The outlet of the air pretreatment unit is connected to the inlet of the reaction unit. The sampling port of the reaction unit is connected to one end of the first gas flow meter, and the other end of the first gas flow meter is connected to the inlet of the water washing unit. The outlet of the water washing unit is connected to the inlet of the sampling pump, and the outlet of the sampling pump is connected to one end of the second gas flow meter. The other end of the second gas flow meter is connected to the oxygen sensor. This invention, on the one hand, washes the sampled gas with water to remove ammonia, thus avoiding damage to the oxygen sensor. On the other hand, by statistically analyzing the flow rates before and after water washing, and fully considering the volume change of the sampled gas before and after water washing, the oxygen content in the reaction unit is calculated to ensure accurate results.

Description

Technical Field

[0001] This utility model relates to the field of ternary material preparation technology, and in particular to an oxygen concentration detection device for a reaction vessel. Background Technology

[0002] The ternary precursor reaction is a salt-base neutralization reaction. A salt solution and a base solution of a certain concentration are continuously added to the reactor at a controlled flow rate. Under appropriate reaction temperature, stirring rate, and pH, a hydroxide precipitate is formed. Oxygen content plays a crucial role in the precursor synthesis process. Without nitrogen protection, the precursor morphology consists of bulk and aggregate structures of varying sizes. Simultaneously, the crystal structure changes, and granular objects appear on the surface of the precursor particles. Therefore, controlling the oxygen concentration during the reaction process is of great significance to the precursor synthesis reaction.

[0003] In existing synthesis reactions, because the solution is turbid and the synthesis reaction takes place in the upper part of the reactor under feeding and stirring conditions, while precipitates form at the bottom, existing dissolved oxygen measurement techniques cannot be used to measure the dissolved oxygen content. Currently, the commonly used method, combining existing oxygen analysis techniques, is to measure the oxygen content in the atmosphere at the top of the reactor to indirectly control the dissolved oxygen content in the lower reaction solution.

[0004] However, the current detection method has the following problems: the top atmosphere contains other gases such as ammonia, nitrogen, oxygen, and water vapor. Ammonia is a toxic gas that causes irreversible damage to the sensor; the sensor needs to be replaced regularly, which increases the detection cost. Utility Model Content

[0005] In view of this, it is necessary to provide an oxygen concentration detection device for a reaction vessel that can solve the problem of ammonia gas damaging the sensor.

[0006] This utility model provides an oxygen concentration detection device for a reaction vessel, comprising:

[0007] The system comprises an air pretreatment unit, a reaction unit, a first gas flow meter, a water washing unit, a sampling pump, a second gas flow meter, and an oxygen sensor. The outlet of the air pretreatment unit is connected to the inlet of the reaction unit. The sampling port of the reaction unit is connected to one end of the first gas flow meter. The other end of the first gas flow meter is connected to the inlet of the water washing unit. The outlet of the water washing unit is connected to the inlet of the sampling pump. The outlet of the sampling pump is connected to one end of the second gas flow meter. The other end of the second gas flow meter is connected to the oxygen sensor.

[0008] In other embodiments, the air pretreatment unit includes an air washer and a first dryer. The air washer has an open inlet and its outlet is connected to the inlet of the first dryer. The outlet of the first dryer is connected to the inlet of the reaction unit.

[0009] In other embodiments, the air pretreatment unit further includes a third gas flow meter and a second oxygen sensor, which are sequentially disposed on the pipeline between the first dryer and the reaction unit.

[0010] In other embodiments, the reaction unit includes a reaction vessel, a stirring assembly, a nickel-cobalt-manganese storage tank, an alkali storage tank, and a complexing agent storage tank. The reaction vessel has a nickel-cobalt-manganese inlet communicating with the nickel-cobalt-manganese storage tank, an alkali inlet communicating with the alkali storage tank, a complexing agent inlet communicating with the complexing agent storage tank, an air inlet communicating with the air pretreatment unit, and a sampling port communicating with the first gas flow meter. The stirring assembly is fixed on the reaction vessel and has a stirring end that extends into the reaction vessel.

[0011] In other embodiments, the reaction unit further includes a level gauge attached to the inner wall of the reaction vessel for detecting the level of the liquid in the reaction vessel.

[0012] In other embodiments, the reaction unit further includes a pH meter, which is attached to the inner wall of the reaction vessel and located at the bottom of the reaction vessel, for detecting the pH value inside the reaction vessel.

[0013] In other embodiments, the washing unit includes a washing bottle, an inlet pipe, and an outlet pipe. The washing bottle contains a washing solution. One end of the inlet pipe is connected to the first gas flow meter, and the other end extends below the liquid level in the washing bottle. One end of the outlet pipe is connected to the top of the washing bottle, and the other end is connected to the second gas flow meter.

[0014] In other embodiments, a sampling gas dryer is also included, which is disposed between the water washing unit and the second gas flow meter.

[0015] In other embodiments, one end of the sampling gas dryer is connected to the gas outlet pipe, and the other end of the sampling gas dryer is connected to the second gas flow meter.

[0016] In other embodiments, openable and closable valves are provided between the air pretreatment unit and the reaction unit, and between the reaction unit and the first gas flow meter.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention includes an air pretreatment unit, a reaction unit, a first gas flow meter, a water washing unit, a sampling pump, a second gas flow meter, and an oxygen sensor. The outlet of the air pretreatment unit is connected to the inlet of the reaction unit. The sampling port of the reaction unit is connected to one end of the first gas flow meter. The other end of the first gas flow meter is connected to the inlet of the water washing unit. The outlet of the water washing unit is connected to the inlet of the sampling pump. The outlet of the sampling pump is connected to one end of the second gas flow meter. The other end of the second gas flow meter is connected to the oxygen sensor. In this invention, the first gas flow meter, the water washing unit, and the second gas flow meter are provided. The water washing unit is used to remove ammonia. The first and second gas flow meters respectively record the flow rates before and after water washing. This invention, on the one hand, washes the sampled gas to remove ammonia, avoiding damage to the oxygen sensor; on the other hand, by recording the flow rates before and after water washing, it fully considers the volume change of the sampled gas before and after water washing and calculates the oxygen content in the reaction unit, ensuring accurate results. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the oxygen concentration detection device in the reactor of this utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the air pretreatment unit;

[0022] Figure 3 for Figure 1 Schematic diagram of the middle water washing unit;

[0023] Wherein: 1-Air pretreatment unit, 11-Air washer, 12-First dryer, 13-Third gas flow meter, 14-Second oxygen sensor;

[0024] 2-Reaction unit, 21-Reaction vessel, 211-Nickel-cobalt-manganese addition port, 212-Alkali-manganese addition port, 213-Complexing agent addition port, 214-Air inlet, 215-Sampling port, 22-Stirring assembly, 23-Level gauge;

[0025] 3-First gas flow meter;

[0026] 4-Water washing unit, 41-Water washing bottle, 42-Air inlet pipe, 43-Air outlet pipe;

[0027] 5 - Sampling pump;

[0028] 6-Second gas flow meter;

[0029] 7-Oxygen sensor;

[0030] 8-Gas dryer;

[0031] 9-Valve. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0033] like Figure 1-3 As shown, an embodiment of this utility model provides an oxygen concentration detection device for a reaction vessel, which includes: an air pretreatment unit 1, a reaction unit 2, a first gas flow meter 3, a water washing unit 4, a sampling pump 5, a second gas flow meter 6, and an oxygen sensor 7. The outlet of the air pretreatment unit 1 is connected to the inlet of the reaction unit 2. The sampling port of the reaction unit 2 is connected to one end of the first gas flow meter 3. The other end of the first gas flow meter 3 is connected to the inlet of the water washing unit 4. The outlet of the water washing unit 4 is connected to the inlet of the sampling pump 5. The outlet of the sampling pump 5 is connected to one end of the second gas flow meter 6. The other end of the second gas flow meter 6 is connected to the oxygen sensor 7.

[0034] During testing, the sampling pump 6 starts working, causing gas to flow. The air pretreatment unit 1 processes the air and sends it into the reaction unit 2, causing the gas in the reaction unit 2 to be discharged from the sampling port. After the first gas flow meter 3 counts the flow rate, it is sent to the water washing unit 4 for water washing to treat the ammonia and particulate matter in the sampled gas. After the second gas flow meter 6 counts the flow rate a second time, it is finally sent to the oxygen sensor 7 to detect the oxygen content. The operator can calculate the oxygen content in the reaction unit 2 by using the detection value of the oxygen sensor 7, the flow rate counted by the second gas flow meter 6, and the flow rate counted by the first gas flow meter 3.

[0035] In this invention, a first gas flow meter 3, a water washing unit 4, and a second gas flow meter 6 are provided. The water washing unit 4 is used to remove ammonia. The first gas flow meter 3 and the second gas flow meter 6 respectively count the flow values ​​before and after water washing. This invention, on the one hand, washes the sampled gas to remove ammonia and avoids damage to the oxygen sensor. On the other hand, by counting the flow values ​​before and after water washing, the volume change of the sampled gas before and after water washing is fully considered, and the oxygen content in the reaction unit 2 is calculated to ensure the accuracy of the results.

[0036] Specifically, the air pretreatment unit 1 includes an air washer 11 and a first dryer 12. The air washer 11 has an open inlet, and its outlet is connected to the inlet of the first dryer 12. The outlet of the first dryer 12 is connected to the inlet of the reaction unit 2. In actual use, the air washer 11 first washes the air to remove carbon dioxide and dust, and then the air is dried by the first dryer 12 before being introduced into the reaction unit 2, ensuring that the gas entering the reaction unit 2 is a dry and safe gas.

[0037] Furthermore, the air pretreatment unit 1 also includes a third gas flow meter 13 and a second oxygen sensor 14, which are sequentially disposed on the pipeline between the first dryer 12 and the reaction unit 2. The third gas flow meter 13 is used to detect the flow rate of the gas supplied to the reaction unit 2, and the second oxygen sensor 14 is used to detect the oxygen content of the gas supplied to the reaction unit 2.

[0038] In practical use, the volume of gas added to the reaction unit 2 and the oxygen content are obtained through the third gas flow meter 13 and the second oxygen sensor 14. The oxygen content in the reaction unit 2 before gas addition is obtained through the results of the first gas flow meter 3, the second gas flow meter 6, and the oxygen sensor 7. Combined with the gas space of the reaction unit 2, the oxygen content in the reaction unit 2 after gas addition can be calculated. This data has more practical significance.

[0039] Specifically, the reaction unit 2 includes a reaction vessel 21, a stirring assembly 22, a nickel-cobalt-manganese storage tank, an alkali storage tank, and a complexing agent storage tank. The reaction vessel 21 has a nickel-cobalt-manganese inlet 211 connected to the nickel-cobalt-manganese storage tank, an alkali inlet 212 connected to the alkali storage tank, a complexing agent inlet 213 connected to the complexing agent storage tank, an air inlet 214 connected to the air pretreatment unit 1, and a sampling port 215 connected to the first gas flow meter 3. The stirring assembly 22 is fixed to the reaction vessel 21 and has a stirring end extending into the reaction vessel 21. In actual use, the nickel-cobalt-manganese reaction solution is added to the reaction vessel 21 through the nickel-cobalt-manganese inlet 211, the sodium hydroxide solution is added to the reaction vessel 21 through the alkali inlet 212, and the complexing agent is added to the reaction vessel 21 through the complexing agent inlet 213. The three react in the reaction vessel 21 to generate a precursor.

[0040] Furthermore, the reaction unit 2 also includes a level gauge 23, which is attached to the inner wall of the reaction vessel 21 to detect the liquid level in the reaction vessel 21. Based on the detected liquid level and the rated volume of the reaction vessel 21, the gas volume inside the reaction vessel 21 can be determined.

[0041] Furthermore, the reaction unit 2 also includes a pH meter, which is attached to the inner wall of the reaction vessel 21 and located at the bottom of the reaction vessel 21, for detecting the pH value inside the reaction vessel 21.

[0042] Specifically, the first gas flow meter 3 and the second gas flow meter 6 are conventional flow detection devices on the market, and their specific structures are well known to those skilled in the art, so they will not be described in detail here.

[0043] Specifically, the washing unit 4 includes a washing bottle 41, an inlet pipe 42, and an outlet pipe 43. The washing bottle 41 contains a washing solution. One end of the inlet pipe 42 is connected to the first gas flow meter 3, and the other end extends below the liquid level in the washing bottle 41. One end of the outlet pipe 43 is connected to the top of the washing bottle 41, and the other end is connected to the second gas flow meter 6. The sampling gas enters the washing bottle 41 through the inlet pipe 42 for washing. The washing solution can absorb ammonia and particulate matter in the sampling gas.

[0044] Specifically, it also includes a sampling gas dryer 8, which is located between the water washing unit 4 and the second gas flow meter 6. The sampling gas dryer 8 is used to dry the sampling gas after it has been washed by the water washing unit 4.

[0045] Furthermore, one end of the sampling gas dryer 8 is connected to the gas outlet pipe 43, and the other end of the sampling gas dryer 8 is connected to the second gas flow meter 6.

[0046] Specifically, an openable and closable valve 9 is provided between the air pretreatment unit 1 and the reaction unit 2, and between the reaction unit 2 and the first gas flow meter 3. By controlling the opening and closing of the valve 9, gas leakage from the reaction unit 2 is prevented.

[0047] The beneficial effects of this utility model are:

[0048] This invention includes: an air pretreatment unit, a reaction unit, a first gas flow meter, a water washing unit, a sampling pump, a second gas flow meter, and an oxygen sensor. The outlet of the air pretreatment unit is connected to the inlet of the reaction unit. The sampling port of the reaction unit is connected to one end of the first gas flow meter. The other end of the first gas flow meter is connected to the inlet of the water washing unit. The outlet of the water washing unit is connected to the inlet of the sampling pump. The outlet of the sampling pump is connected to one end of the second gas flow meter. The other end of the second gas flow meter is connected to the oxygen sensor. In this invention, the first gas flow meter, the water washing unit, and the second gas flow meter are provided. The water washing unit is used to remove ammonia. The first gas flow meter and the second gas flow meter respectively record the flow rate values ​​before and after water washing. This invention, on the one hand, washes the sampled gas to remove ammonia, avoiding damage to the oxygen sensor; on the other hand, by recording the flow rate values ​​before and after water washing, it fully considers the volume change of the sampled gas before and after water washing and calculates the oxygen content in the reaction unit, ensuring accurate results.

[0049] In the description of this application, it should be noted that the terms "upper" and "lower," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0050] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A device for detecting oxygen concentration in a reaction vessel, characterized in that, include: The system comprises an air pretreatment unit, a reaction unit, a first gas flow meter, a water washing unit, a sampling pump, a second gas flow meter, and an oxygen sensor. The outlet of the air pretreatment unit is connected to the inlet of the reaction unit. The sampling port of the reaction unit is connected to one end of the first gas flow meter. The other end of the first gas flow meter is connected to the inlet of the water washing unit. The outlet of the water washing unit is connected to the inlet of the sampling pump. The outlet of the sampling pump is connected to one end of the second gas flow meter. The other end of the second gas flow meter is connected to the oxygen sensor.

2. The oxygen concentration detection device for the reactor as described in claim 1, characterized in that, The air pretreatment unit includes an air washer and a first dryer. The air washer has an open air inlet and an air outlet connected to the air inlet of the first dryer. The air outlet of the first dryer is connected to the air inlet of the reaction unit.

3. The oxygen concentration detection device for the reactor as described in claim 2, characterized in that, The air pretreatment unit also includes a third gas flow meter and a second oxygen sensor, which are sequentially disposed on the pipeline between the first dryer and the reaction unit.

4. The oxygen concentration detection device for the reactor as described in claim 1, characterized in that, The reaction unit includes a reaction vessel, a stirring assembly, a nickel-cobalt-manganese storage tank, an alkali storage tank, and a complexing agent storage tank. The reaction vessel has a nickel-cobalt-manganese inlet connected to the nickel-cobalt-manganese storage tank, an alkali inlet connected to the alkali storage tank, a complexing agent inlet connected to the complexing agent storage tank, an air inlet connected to the air pretreatment unit, and a sampling port connected to the first gas flow meter. The stirring assembly is fixed on the reaction vessel and has a stirring end that extends into the reaction vessel.

5. The oxygen concentration detection device for the reactor as described in claim 4, characterized in that, The reaction unit also includes a level gauge, which is attached to the inner wall of the reaction vessel and used to detect the level of the liquid in the reaction vessel.

6. The oxygen concentration detection device for the reactor as described in claim 4, characterized in that, The reaction unit also includes a pH meter, which is attached to the inner wall of the reaction vessel and located at the bottom of the reaction vessel, and is used to detect the pH value inside the reaction vessel.

7. The oxygen concentration detection device for the reactor as described in claim 1, characterized in that, The washing unit includes a washing bottle, an air inlet pipe, and an air outlet pipe. The washing bottle contains a washing solution. One end of the air inlet pipe is connected to the first gas flow meter, and the other end extends below the liquid level in the washing bottle. One end of the air outlet pipe is connected to the top of the washing bottle, and the other end is connected to the second gas flow meter.

8. The oxygen concentration detection device for the reactor as described in claim 7, characterized in that, It also includes a sampling gas dryer, which is disposed between the water washing unit and the second gas flow meter.

9. The oxygen concentration detection device for a reaction vessel as described in claim 8, characterized in that, One end of the sampling gas dryer is connected to the gas outlet pipe, and the other end of the sampling gas dryer is connected to the second gas flow meter.

10. The oxygen concentration detection device for the reactor as described in claim 1, characterized in that, Valves that can be opened and closed are provided between the air pretreatment unit and the reaction unit, and between the reaction unit and the first gas flow meter.

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