CN219105587U

CN219105587U - NMP system with flow detection

Info

Publication number: CN219105587U
Application number: CN202223271637.3U
Authority: CN
Inventors: 张文化; 王少军; 徐孝军; 童明刚; 刘家璋; 肖钦刚
Original assignee: Guangdong Smart Automation Technology Co ltd; Guangdong Deer Smart Factory Technology Co Ltd
Current assignee: Guangdong Smart Automation Technology Co ltd; Guangdong Deer Smart Factory Technology Co Ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-05-30
Anticipated expiration: 2032-12-06

Abstract

The utility model relates to the technical field of NMP, in particular to an NMP system with flow detection, which comprises an NMP recovery unit, an air inlet pipeline and a flow detection mechanism; the air inlet pipeline is used for being connected with an air inlet of the NMP recovery unit, and a first valve and a second valve are arranged on the air inlet pipeline; the flow detection mechanism comprises a gas flow sensor and a controller, wherein the gas flow sensor is arranged on the air inlet pipeline and is positioned between the first valve and the air inlet of the NMP recovery unit; the controller is used for controlling the second valve to be closed when the first valve is closed and the gas flow detected by the gas flow sensor is greater than 0. According to the technical scheme, the safety of the NMP system can be improved.

Description

NMP system with flow detection

Technical Field

The utility model relates to the technical field of NMP, in particular to an NMP system with flow detection.

Background

NMP and N-methyl pyrrolidone are organic matters, have a chemical formula of C5H9NO, are colorless to pale yellow transparent liquid, have slight ammonia smell, are mixed with water in any proportion, are dissolved in various organic solvents such as diethyl ether, acetone, esters, halogenated hydrocarbon, aromatic hydrocarbon and the like, are almost completely mixed with all solvents, and are very important auxiliary materials for producing electrodes of lithium ion batteries.

At present, NMP gas is generally recycled through an NMP system, wherein the NMP system comprises an NMP recycling unit and an air inlet pipeline connected with an air inlet of the NMP recycling unit, and a valve is arranged on the air inlet pipeline. In some applications, such as when servicing an NMP recovery unit, it is desirable to close a valve to prevent NMP gas from flowing from the inlet pipe into the NMP recovery unit. However, the valve is sometimes damaged and not tightly closed, so that part of the gas still flows into the NMP recovery unit, and the life safety of overhaulers is influenced because the NMP gas is toxic, so that the situation needs to be solved.

Disclosure of Invention

In view of this, the present utility model provides an NMP system with flow detection, and the technical problems to be solved are: how to improve the safety of NMP systems.

In order to achieve the above purpose, the present utility model mainly provides the following technical solutions:

the embodiment of the utility model provides an NMP system with flow detection, which comprises an NMP recovery unit, an air inlet pipeline and a flow detection mechanism; the air inlet pipeline is used for being connected with an air inlet of the NMP recovery unit, and a first valve and a second valve are arranged on the air inlet pipeline; the flow detection mechanism comprises a gas flow sensor and a controller, wherein the gas flow sensor is arranged on the air inlet pipeline and is positioned between the first valve and the air inlet of the NMP recovery unit; the controller is used for controlling the second valve to be closed when the first valve is closed and the gas flow detected by the gas flow sensor is greater than 0.

Optionally, the NMP system with flow detection further comprises an alarm module; the controller is also used for controlling the alarm module to execute alarm response when the first valve is closed and the gas flow detected by the gas flow sensor is greater than 0.

Optionally, the NMP system with flow detection further includes a barometric sensor; the air pressure sensor is used for detecting air pressure at an air inlet of the NMP recovery unit; the controller is used for controlling the first valve to be closed when the air pressure at the air inlet of the NMP recovery unit is larger than a preset value.

Optionally, the NMP system with flow detection further includes a gas concentration sensor, an exhaust fan, and a third valve; an air outlet of the NMP recovery unit is connected with an air outlet pipeline, and the third valve is arranged on the air outlet pipeline; the gas concentration sensor is arranged on the gas outlet pipeline and is positioned between the third valve and the gas outlet of the NMP recovery unit so as to detect the gas concentration on the gas outlet pipeline; the air inlet pipeline is provided with a first interface, and the first valve and the second valve are positioned between the first interface and an air inlet of the NMP recovery unit; the air outlet pipeline is provided with a second interface, and the second interface is positioned between the third valve and the air outlet of the NMP recovery unit; a return air pipeline is connected between the first interface and the second interface, and a fourth valve is arranged on the return air pipeline; and the controller is used for controlling the third valve to be closed and controlling the fourth valve to be opened when the gas concentration on the gas outlet pipeline is larger than the preset concentration.

Optionally, an exhaust fan is further arranged on the return air pipeline, and the exhaust fan is used for sucking the gas on the air outlet pipeline to the air inlet pipeline; the controller is further used for controlling the exhaust fan to be started when the gas concentration on the gas outlet pipeline is larger than a preset concentration.

By means of the technical scheme, the NMP system with flow detection has at least the following beneficial effects:

in the technical scheme provided by the utility model, when the NMP recovery unit is overhauled, the first valve is closed, the gas flow sensor can monitor the gas flow on the gas inlet pipeline, and when the gas flow is monitored to be more than 0, the first valve is not closed, and still gas flows into the NMP recovery unit along the gas inlet pipeline. At this time, the controller can control the second valve to be closed, namely the standby valve, and the second valve and the first valve are matched to ensure that the air inlet pipeline is closed, so that gas is prevented from flowing into the NMP recovery unit to influence the life safety of overhaulers, and the safety of the NMP system is improved.

The foregoing description is only an overview of the present utility model, and is intended to provide a better understanding of the present utility model, as it is embodied in the following description, with reference to the preferred embodiments of the present utility model and the accompanying drawings.

Drawings

FIG. 1 is a schematic diagram of an NMP system with flow sensing according to an embodiment of the utility model;

FIG. 2 is a partial flow block diagram of an NMP system with flow detection according to an embodiment of the utility model.

Reference numerals: 1. NMP recovery unit; 2. a first valve; 3. a second valve; 4. a gas flow sensor; 5. an air pressure sensor; 6. an air intake duct; 7. an air outlet pipe; 8. a return air duct; 9. a third valve; 10. a fourth valve; 11. an exhaust fan; 12. a controller; 13. an alarm module; 14. a gas concentration sensor; 61. a first interface; 71. and a second interface.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

As shown in fig. 1, an NMP system with flow detection according to an embodiment of the present utility model includes an NMP recovery unit 1, an air intake pipe 6, and a flow detection mechanism. The NMP recovery unit 1 has an air inlet and an air outlet. The NMP recovery unit 1 is used for recovering NMP in gas, which is a commercially available part and will not be described here again.

The aforementioned air intake duct 6 is for connection with the air intake of the NMP recovery unit 1. The air inlet pipeline 6 is provided with a first valve 2 and a second valve 3. In a specific application, the first valve 2 is a main valve, and the second valve 3 is a standby valve. The first valve 2 and the second valve 3 are normally open electric valves.

The aforementioned flow rate detection mechanism includes the gas flow rate sensor 4 and the controller 12. The gas flow sensor 4 is arranged on the gas inlet pipeline 6 and is positioned between the first valve 2 and the gas inlet of the NMP recovery unit 1. The gas flow sensor 4 is a commercially available component, and its specific structure is the prior art and will not be described here again.

As shown in fig. 2, the aforementioned controller 12 is configured to control the second valve 3 to be closed when the first valve 2 is closed and the gas flow rate detected by the gas flow rate sensor 4 is greater than 0. Wherein the controller 12 may be a processor or a PLC, etc. When the first valve 2 is closed and the gas flow rate detected by the gas flow rate sensor 4 is greater than 0, the controller 12 generates a first signal according to which the second valve 3 is automatically closed.

In the above example, when the NMP recovery unit 1 is overhauled, the first valve 2 is closed, the gas flow sensor 4 can monitor the gas flow on the gas inlet pipe 6, and when the gas flow is monitored to be greater than 0, it is indicated that the first valve 2 is not closed, and still gas flows into the NMP recovery unit 1 along the gas inlet pipe 6. At this time, the controller 12 can control the second valve 3, namely the standby valve to be closed, and the second valve 3 and the first valve 2 are matched to ensure that the air inlet pipeline 6 is closed, so that the gas is prevented from flowing into the NMP recovery unit 1 to influence the life safety of overhaulers, and the safety of the NMP system is improved.

As shown in fig. 2, the NMP system with flow detection may further include an alarm module 13, where the alarm module 13 may be a buzzer or the like. The controller 12 is further configured to control the alarm module 13 to perform an alarm response when the first valve 2 is closed and the gas flow rate detected by the gas flow rate sensor 4 is greater than 0. Specifically, when the first valve 2 is closed and the gas flow rate detected by the gas flow rate sensor 4 is greater than 0, the controller 12 also generates an alarm signal according to which the alarm module 13 performs an alarm response such as a buzzer, a light flash, or a text prompt.

In a specific application example, as shown in fig. 1, the NMP system with flow detection may further include a barometric sensor 5, where the barometric sensor 5 is disposed at the air inlet of the NMP recovery unit 1. The air pressure sensor 5 is used for detecting the air pressure at the air inlet of the NMP recycling unit 1. The controller 12 is used for controlling the first valve 2 to be closed when the air pressure at the air inlet of the NMP recycling unit 1 is greater than a preset value. The preset value can be the maximum pressure which can be borne by the inside of the NMP recovery unit 1, if the pressure of the gas entering the NMP recovery unit 1 is greater than the preset value, the controller 12 timely controls the first valve 2 to be closed so as to prevent the gas from continuously flowing into the NMP recovery unit 1, so that the safety of the NMP recovery unit 1 can be improved, and the NMP recovery unit 1 is prevented from being damaged due to the fact that the pressure of the gas is increased to impact the inside of the NMP recovery unit 1.

As shown in fig. 1 and 2, the aforementioned NMP system with flow detection may further comprise a gas concentration sensor 14, a suction fan 11 and a third valve 9. The gas outlet of the NMP recovery unit 1 is connected with a gas outlet pipeline 7, and a third valve 9 is arranged on the gas outlet pipeline 7. A gas concentration sensor 14 is provided on the gas outlet pipe 7 between the third valve 9 and the gas outlet of the NMP recovery unit 1 to detect the gas concentration on the gas outlet pipe 7, specifically, the gas concentration sensor 14 is for detecting the concentration of NMP in the exhaust gas. The air inlet pipe 6 is provided with a first interface 61, and the first valve 2 and the second valve 3 are positioned between the first interface 61 and the air inlet of the NMP recovery unit 1. The air outlet pipeline 7 is provided with a second interface 71, and the second interface 71 is positioned between the third valve 9 and the air outlet of the NMP recovery unit 1. A return air pipeline 8 is connected between the first interface 61 and the second interface 71, and a fourth valve 10 is arranged on the return air pipeline 8. The controller 12 is configured to control the third valve 9 to be closed and the fourth valve 10 to be opened when the gas concentration on the gas outlet pipe 7 is greater than a preset concentration.

In the above example, the preset concentration is the concentration of NMP that can be directly discharged to the atmosphere. When the gas concentration sensor 14 detects that the concentration of NMP in the exhaust gas exceeds the standard, the controller 12 generates a second signal and a third signal, the third valve 9 is automatically closed according to the second signal, the fourth valve 10 is automatically opened according to the third signal, so that the gas with the exceeding NMP concentration can be prevented from being discharged into the atmosphere, and the gas can flow back to the air inlet pipeline 6 along the return pipeline 8 and enter the NMP recovery unit 1 again for secondary recovery and purification.

As shown in fig. 1 and 2, the aforementioned return air duct 8 may also be provided with an exhaust fan 11, where the exhaust fan 11 is configured to suck the air in the air outlet duct 7 into the air inlet duct. The controller 12 is further configured to control the exhaust fan 11 to be turned on when the concentration of the gas on the gas outlet pipe 7 is greater than a preset concentration, so that the efficiency of the gas flowing back to the gas inlet pipe 6 can be improved.

The working principle and preferred embodiments of the present utility model are described below.

The utility model relates to an NMP system with flow detection, which comprises an NMP recovery unit 1 and an air inlet pipeline 6 connected with an air inlet of the NMP recovery unit 1, wherein the air inlet pipeline 6 is provided with a first valve 2, a second valve 3 and a gas flow sensor 4. Wherein the first valve 2 is a main valve, and the second valve 3 is a standby valve. The gas flow sensor 4 is located on the downstream side of the first valve 2 and the second valve 3. When the first valve 2 is closed and the gas flow rate detected by the gas flow rate sensor 4 is greater than 0, the controller 12 controls the second valve 3 to be closed. Wherein, the second valve 3 can be ensured to close the air inlet pipe 6 with first valve 2 cooperation to prevent gas inflow NMP recovery unit 1 to influence maintainer's life safety, thereby improved NMP system's security.

What needs to be explained here is: under the condition of no conflict, the technical features related to the examples can be combined with each other according to actual situations by a person skilled in the art so as to achieve corresponding technical effects, and specific details of the combination situations are not described in detail herein.

The above description is only a preferred embodiment of the present utility model, and the protection scope of the present utility model is not limited to the above examples, and all technical solutions belonging to the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that modifications and adaptations to the present utility model may occur to one skilled in the art without departing from the principles of the present utility model and are intended to be within the scope of the present utility model.

Claims

1. An NMP system with flow detection is characterized by comprising an NMP recovery unit (1), an air inlet pipeline (6) and a flow detection mechanism;

the air inlet pipeline (6) is used for being connected with an air inlet of the NMP recovery unit (1), and a first valve (2) and a second valve (3) are arranged on the air inlet pipeline (6);

the flow detection mechanism comprises a gas flow sensor (4) and a controller (12), wherein the gas flow sensor (4) is arranged on the air inlet pipeline (6) and is positioned between the first valve (2) and the air inlet of the NMP recovery unit (1);

the controller (12) is used for controlling the second valve (3) to be closed when the first valve (2) is closed and the gas flow detected by the gas flow sensor (4) is larger than 0.

2. NMP system with flow detection according to claim 1, characterized by an alarm module (13);

the controller (12) is further configured to control the alarm module (13) to perform an alarm response when the first valve (2) is closed and the gas flow detected by the gas flow sensor (4) is greater than 0.

3. NMP system with flow detection according to claim 1, characterized by further comprising a barometric pressure sensor (5);

the air pressure sensor (5) is used for detecting air pressure at the air inlet of the NMP recovery unit (1);

the controller (12) is used for controlling the first valve (2) to be closed when the air pressure at the air inlet of the NMP recovery unit (1) is larger than a preset value.

4. NMP system with flow detection according to claim 1, characterized by further comprising a gas concentration sensor (14), a suction fan (11) and a third valve (9);

an air outlet of the NMP recovery unit (1) is connected with an air outlet pipeline (7), and the third valve (9) is arranged on the air outlet pipeline (7);

the gas concentration sensor (14) is arranged on the gas outlet pipeline (7) and is positioned between the third valve (9) and the gas outlet of the NMP recovery unit (1) so as to detect the gas concentration on the gas outlet pipeline (7);

the air inlet pipeline (6) is provided with a first interface (61), and the first valve (2) and the second valve (3) are positioned between the first interface (61) and an air inlet of the NMP recovery unit (1); the air outlet pipeline (7) is provided with a second interface (71), and the second interface (71) is positioned between the third valve (9) and the air outlet of the NMP recovery unit (1);

a return air pipeline (8) is connected between the first interface (61) and the second interface (71), and a fourth valve (10) is arranged on the return air pipeline (8);

the controller (12) is used for controlling the third valve (9) to be closed and the fourth valve (10) to be opened when the gas concentration on the gas outlet pipeline (7) is larger than a preset concentration.

5. The NMP system with flow detection of claim 4, wherein,

an exhaust fan (11) is further arranged on the return air pipeline (8), and the exhaust fan (11) is used for sucking gas on the air outlet pipeline (7) to the air inlet pipeline;

the controller (12) is further configured to control the exhaust fan (11) to be turned on when the gas concentration on the gas outlet pipe (7) is greater than a preset concentration.