CN216878637U - Nitrogen making system - Google Patents

Abstract

The application discloses nitrogen system relates to nitrogen and prepares the equipment field. A nitrogen generation system comprising: the device comprises an air treatment device, a nitrogen preparation device and a nitrogen pressurization device; the air treatment device comprises a first air compressor unit, a second air compressor unit and an air treatment assembly, the first air compressor unit and the second air compressor unit are arranged in parallel, air outlet ends of the first air compressor unit and the second air compressor unit are connected with the air treatment assembly, and the air outlet end of the air treatment assembly is connected with the nitrogen preparation device through an air conveying pipeline; the nitrogen gas supercharging device comprises a first nitrogen compressor unit and a second nitrogen compressor unit, the first nitrogen compressor unit and the second nitrogen compressor unit are arranged in parallel, and respective air inlet ends of the first nitrogen compressor unit and the second nitrogen compressor unit are connected with the nitrogen gas preparation device through a nitrogen gas conveying pipeline. The method and the device can at least solve the problem that the critical component of the nitrogen making equipment is in failure to influence the nitrogen making efficiency.

Description

Nitrogen making system

Technical Field

The application belongs to the technical field of nitrogen preparation equipment, and particularly relates to a nitrogen preparation system.

Background

The nitrogen is used as the component with the highest content in the air, has no corrosiveness and higher economical efficiency, and has wider and wider application range. There are various methods for producing nitrogen, such as cryogenic separation, pressure swing adsorption, membrane separation, etc., wherein membrane separation is a process of separating and purifying nitrogen by using the difference in permeation rate of a nitrogen separation membrane.

However, the existing nitrogen production equipment mostly adopts a 'one-to-one' mode when membrane separation is carried out for producing nitrogen, and when some key parts of the equipment are in failure, the equipment cannot continuously operate, and the nitrogen production efficiency is directly influenced.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a nitrogen production system, which can at least solve the problem that the failure of key components of nitrogen production equipment affects the nitrogen production efficiency.

In order to solve the technical problem, the present application is implemented as follows:

the embodiment of the application provides a nitrogen system, and this nitrogen system includes: the device comprises an air treatment device, a nitrogen preparation device and a nitrogen pressurization device;

the air treatment device comprises a first air compressor unit, a second air compressor unit and an air treatment assembly, the first air compressor unit and the second air compressor unit are arranged in parallel, air outlet ends of the first air compressor unit and the second air compressor unit are both connected with the air treatment assembly, and the air outlet end of the air treatment assembly is connected with the nitrogen preparation device through an air conveying pipeline;

the nitrogen gas supercharging device comprises a first nitrogen compressor unit and a second nitrogen compressor unit, the first nitrogen compressor unit and the second nitrogen compressor unit are arranged in parallel, and respective air inlet ends of the first nitrogen compressor unit and the second nitrogen compressor unit are connected with the nitrogen gas preparation device through a nitrogen gas conveying pipeline.

In the embodiment of the application, the first air compressor unit and the second air compressor unit are arranged in parallel and can be operated independently or simultaneously, in some cases, one of the first air compressor unit is used as a main component for nitrogen production, the other air compressor unit is used as a standby component, and when one air compressor unit fails, the other air compressor unit can be started, so that the air compression process cannot be influenced by the failure of one air compressor unit; in other cases, the first air compressor unit and the second air compressor unit can be started simultaneously to improve the compression efficiency of air and ensure the air pressure.

Similarly, the first nitrogen press unit and the second nitrogen press unit can be operated independently or simultaneously, and can be selected according to actual working conditions, in some cases, one of the first nitrogen press unit and the second nitrogen press unit is used as a main part for nitrogen pressurization, the other is used as a standby part, and when one of the first nitrogen press unit and the second nitrogen press unit fails, the other can be started, so that the nitrogen pressurization process cannot be influenced by the failure of one of the nitrogen press units; in other cases, the first nitrogen press unit and the second nitrogen press unit can be started simultaneously to improve the pressurization efficiency of the nitrogen and the pressure of the nitrogen.

Based on the setting, air treatment device and nitrogen gas supercharging device in the embodiment of the application all adopt the mode of "one is equipped with one" to can switch to different mode under the different circumstances, and then can adapt to multiple operating mode, and guarantee the normal operating of nitrogen system, improve nitrogen gas's the efficiency of preparing.

Drawings

FIG. 1 is a schematic illustration of a nitrogen generation system disclosed in an embodiment of the present application;

FIG. 2 is a schematic view of an air treatment device and other accessories disclosed in an embodiment of the present application;

FIG. 3 is a schematic view of a nitrogen gas producing apparatus and other accessories disclosed in the examples of the present application;

FIG. 4 is a schematic view of a nitrogen pressurization device and other accessories disclosed in the embodiments of the present application.

Description of reference numerals:

100-an air treatment device; 110-a first air compressor package; 120-a second air compressor set; 130-an air handling component; 131-a first processing branch; 1311-first branch body; 1312-a first on-off valve; 1313-blotting member; 1314-a second on-off valve; 1315-a first one-way valve; 1316-a filter member; 132-a second processing branch; 133-a third treatment branch; 1331-a second branch body; 1332-oil and gas separation member; 1333-a heat dissipating member; 1334-a third on/off valve; 1335-a second one-way valve; 134-fourth processing branch; 135-air buffer container; 136-heating branch; 137-a communication branch; 138-second switching valve;

200-nitrogen preparation device;

300-nitrogen pressurization device; 310-a first nitrogen press train; 320-a second nitrogen press group; 330-first nitrogen branch; 331-a fourth switching valve; 340-second nitrogen branch;

400-air delivery lines; 410-a first switching valve;

500-nitrogen gas delivery line; 510-nitrogen purity regulating valve; 520-a third switching valve; 530-nitrogen buffer container;

600-an exhaust line;

700-an emptying device;

810-dew point analysis element; 820-a first temperature sensing element; 830-a first pressure-detecting element; 840-an air compressor set operation parameter detection element; 850-oxygen concentration analysis element; 860-a second pressure sensing element; 870 — a second temperature detection element.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The wearable device provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Referring to fig. 1 to 4, an embodiment of the present application discloses a nitrogen production system, which includes an air treatment device 100, a nitrogen production device 200, and a nitrogen pressurization device 300.

The air treatment device 100 is used to compress and treat air to meet nitrogen production requirements. In some embodiments, air treatment device 100 includes a first air compressor package 110, a second air compressor package 120, and an air treatment assembly 130. The first air compressor unit 110 and the second air compressor unit 120 are arranged in parallel, air outlet ends of the first air compressor unit 110 and the second air compressor unit 120 are connected with the air processing assembly 130, and an air outlet end of the air processing assembly 130 is connected with the nitrogen gas production device 200 through an air conveying pipeline 400.

Alternatively, both the first air compressor package 110 and the second air compressor package 120 may be driven by electric motors. Compared with the mode of driving by adopting a fuel engine, the motor driving mode can reduce the maintenance and maintenance cost and reduce the pollution to the environment.

It is to be appreciated that both the first air compressor package 110 and the second air compressor package 120 may compress air. In some embodiments, the first air compressor set 110 may be used alone to compress air, and at this time, the second air compressor set 120 is in a shutdown state, that is, the first air compressor set 110 is an operating set and the second air compressor set 120 is a standby set, in which case, qualified compressed air may also be provided to the nitrogen gas production device 200. When the first air compressor unit 110 is in an emergency, for example, when the first air compressor unit 110 is in an abnormal condition or has a fault during operation, the first air compressor unit 110 may be stopped, and the second air compressor unit 120 may be started to replace the first air compressor unit 110 to operate through the second air compressor unit 120, so that the air treatment device 100 may not be stopped, thereby ensuring uninterrupted operation of the air treatment device 100 and further ensuring normal operation of the whole nitrogen production system. On the contrary, when the second air compressor set 120 is the operating set and the first air compressor set 110 is the standby set, the specific principle is similar to the above-mentioned principle, and the detailed description thereof is omitted.

In addition, under some circumstances, for example, when the output of one air compressor unit cannot meet the compression requirement of air, the compression speed of air needs to be increased, and at this time, the first air compressor unit 110 and the second air compressor unit 120 can be started simultaneously to enable the first air compressor unit and the second air compressor unit to operate simultaneously, so that air with a larger flow rate can be compressed, and the compression efficiency of air is improved to meet the requirement of nitrogen generation.

The air compressed by the first air compressor unit 110 and/or the second air compressor unit 120 enters the air processing assembly 130 and is processed by the air processing assembly 130, so that the compressed air meets the nitrogen preparation requirement; the processed compressed air enters the nitrogen gas production device 200 through the air conveying pipeline 400, so that the nitrogen gas is separated through the nitrogen gas production device 200, and the nitrogen gas is produced.

In some embodiments, the nitrogen production apparatus 200 may include a plurality of sets of separation membranes connected in parallel, and the nitrogen in the air may be separated by the plurality of sets of separation membranes to achieve nitrogen production. It should be noted that the specific structure of the nitrogen gas producing device 200 and the operation principle thereof are all referred to the prior art and will not be described in detail herein.

The nitrogen gas pressurization device 300 comprises a first nitrogen pressure unit 310 and a second nitrogen pressure unit 320 which are arranged in parallel, and the respective gas inlet ends of the first nitrogen pressure unit 310 and the second nitrogen pressure unit 320 are connected with the nitrogen gas production device 200 through a nitrogen gas conveying pipeline 500. Based on this, the nitrogen gas produced can be conveyed to the first nitrogen compressor set 310 and/or the second nitrogen compressor set 320 through the nitrogen gas conveying pipeline 500 for pressurization, so that the nitrogen gas can meet the subsequent requirements.

It is understood that both the first nitrogen press train 310 and the second nitrogen press train 320 may pressurize nitrogen. In some embodiments, the first nitrogen press unit 310 may be used alone to pressurize the nitrogen gas, and at this time, the second nitrogen press unit 320 is in a shutdown state, that is, the first nitrogen press unit 310 is an operating unit, and the second nitrogen press unit 320 is a standby unit, in this case, the nitrogen gas with the qualified pressure may also be obtained. When the first nitrogen compressor unit 310 is in an emergency, for example, when the first nitrogen compressor unit 310 is in an abnormal state or has a fault during operation, the first nitrogen compressor unit 310 may be stopped, and the second nitrogen compressor unit 320 may be started to replace the first nitrogen compressor unit 310 to operate through the second nitrogen compressor unit 320. On the contrary, when the second nitrogen compressor unit 320 is an operating unit and the first nitrogen compressor unit 310 is a standby unit, the specific principle is similar to the above-mentioned principle, and the detailed description thereof is omitted.

In addition, under some circumstances, for example, when a nitrogen press unit output can not satisfy the pressure demand of nitrogen gas, the pressure boost speed of nitrogen gas needs to be accelerated, at this moment, first nitrogen press unit 310 and second nitrogen press unit 320 can be started simultaneously to make both operate simultaneously, thereby can pressurize more large-traffic nitrogen gas, and then improve the pressure boost efficiency of nitrogen gas, in order to satisfy follow-up requirement.

In the embodiment of the present application, the first air compressor unit 110 and the second air compressor unit 120 are arranged in parallel, and both of them may operate separately or simultaneously; likewise, the first nitrogen press train 310 and the second nitrogen press train 320 may be operated individually or simultaneously. Based on the above arrangement, the air treatment device 100 and the nitrogen pressurization device 300 in the embodiment of the present application both adopt a mode of "one for one", so that different working modes can be switched under different conditions, and further multiple working conditions can be adapted to, and normal operation of the nitrogen generation system is ensured.

To treat the air, the air treatment assembly 130 may include a first treatment branch 131 and a second treatment branch 132, the first treatment branch 131 and the second treatment branch 132 being disposed in parallel and both being connected to the air delivery line 400. In this way, the compressed air processed by the first processing branch 131 and/or the second processing branch 132 can be transmitted to the nitrogen gas producing device 200 along the air transmission line 400.

In some embodiments, first treatment branch 131 includes a first branch body 1311, a first switching valve 1312, and a stem member 1313, with first switching valve 1312 and stem member 1313 each disposed in first branch body 1311. The first branch body 1311 is used to channel air, the first on-off valve 1312 is used to control the on/off of the first branch body 1311, and the blotting member 1313 is used to absorb moisture in the compressed air. Alternatively, the blotting member 1313 may be a blotting machine or the like, and the specific structure thereof and the working principle thereof are all referred to the prior art.

Based on the above arrangement, in the open state of the first switching valve 1312, the compressed air flows through the first branch body 1311, and the moisture in the compressed air is adsorbed via the adsorption member 1313, so that the drying effect on the compressed air is achieved, thereby satisfying the nitrogen generation requirement.

It should be noted that the specific structure and the operation principle of the second processing branch 132 are substantially the same as those of the first processing branch 131, and are not described herein again.

In order to detect whether the dew point value of the compressed air meets the requirement, the nitrogen generation system may further include a dew point analysis element 810, the dew point analysis element 810 is disposed on the air delivery pipeline 400, and the dew point analysis element 810 may monitor the dew point of the compressed air processed by the compressor, so as to determine whether the dew point requirement is met. It should be noted that the dew point analyzing element 810 may be a dew point analyzer, and the specific structure and the operation principle thereof can refer to the prior art, which is not described herein again.

In order to prevent the unqualified compressed gas from entering the nitrogen gas production device 200, the air conveying pipeline 400 may be provided with a first switching valve 410 at the downstream of the dew point analyzing element 810, the first switching valve 410 is provided with a vent port, the vent port is connected with the vent device 700, and the dew point analyzing element 810 is in signal connection with the first switching valve 410. It should be noted here that the air delivery pipe 400 is located downstream of the dew point analyzing element 810, specifically, at the rear side of the dew point analyzing element 810 in the flowing direction of the compressed gas, that is, the compressed gas first passes through the dew point analyzing element 810 and then passes through the first switching valve 410.

Based on the above arrangement, the dew point analysis component 810 detects the dew point value of the compressed air, and when the dew point value of the compressed air meets the requirement of nitrogen production, the first switching valve 410 is in a dredging state, and the air conveying pipeline 400 is communicated through the first switching valve 410, so that the compressed air flows to the nitrogen production device 200 through the air conveying pipeline 400, and the compressed air meeting the requirement is provided for nitrogen production. In contrast, when the dew point value of the compressed air does not satisfy the nitrogen production requirement, the dew point analyzing element 810 sends a signal to the first switching valve 410 to switch the first switching valve 410 to the emptying state, so that the compressed air flows to the emptying device 700 along the emptying port, and is emptied to a safe area by the emptying device 700, so as to prevent the unqualified compressed air from entering the nitrogen production device 200 and affecting the production of nitrogen.

Since the first processing branch 131 and the second processing branch 132 are disposed in parallel, and the first branch bodies 1311 are respectively provided with the first switch valves 1312, at least one of the first switch valves can be selected to operate according to actual conditions, so as to meet actual requirements.

In some embodiments, the first switching valve 1312 of each of the first processing branch 131 and the second processing branch 132 is in signal connection with the dew point analysis component 810. Typically, one of the processing branches may be enabled and the other one may be in a non-enabled state, i.e., a standby state. Alternatively, the first switch valve 1312 of the first processing branch 131 is opened, and the compressed air may be processed through the corresponding blotting member 1313 and then enter the air delivery line 400; when the dew point analyzing component 810 detects that the dew point value of the compressed air exceeds the preset dew point value, it indicates that the drying component 1313 of the first processing branch 131 is abnormal, and the compressed air processed by the first processing branch 131 cannot meet the nitrogen making requirement, so the dew point analyzing component 810 sends a signal to the first switch valve 1312 of the first processing branch 131 to close the first switch valve, and sends a signal to the first switch valve 1312 of the second processing branch 132 to open the first switch valve, so that the compressed air is processed by the second processing branch 132, and the compressed air meeting the dew point value requirement can be obtained. Meanwhile, when the dew point value of the compressed air does not meet the requirement, the dew point analysis component 810 also sends a signal to the first switching valve 410 to switch the first switching valve 410 to the emptying state, so that the compressed air is emptied through the emptying device 700.

Based on the above arrangement, when one of the processing branches is abnormal, the supply of the compressed air can be ensured without stopping the machine, so that the operation stability and the compressed air processing efficiency of the air processing assembly 130 are improved.

In some embodiments, each of the first and second treatment branches 131 and 132 may include a second on-off valve 1314 and a first one-way valve 1315, the second on-off valve 1314 being disposed in the first branch body 1311 on a side of the blotting member 1313 facing away from the first on-off valve 1312, and the first one-way valve 1315 being disposed in the first branch body 1311 on a side of the second on-off valve 1314 facing away from the blotting member 1313.

Wherein the first on-off valve 1312 may be disposed upstream of the suck-dry member 1313, and the second on-off valve 1314 may be disposed downstream of the suck-dry member 1313, so that the compressed gas may flow in the direction of the first on-off valve 1312, the suck-dry member 1313, and the second on-off valve 1314. Thus, the first processing branch 131 can be controlled to be switched on and off by the first switching valve 1312 and the second switching valve 1314, or the second processing branch 132 can be controlled to be switched on and off; also, the compressed air in the air delivery line 400 may be prevented from flowing back into the first or second processing branch 131 or 132 by the first check valve 1315.

It should be noted here that the first on-off valve 1312 may be used as an air inlet valve, and the second on-off valve 1314 may be used as an air outlet valve, so that one of the first processing branch 131 and the second processing branch 132 may be operated and the other one may be in standby by providing an air inlet valve, an air outlet valve and a one-way valve, and the problem of gas flow channeling may not occur.

In order to ensure the cleanliness of the compressed air, each of the first and second treating branches 131 and 132 may include a filtering member 1316, and the filtering member 1316 is provided to the first branch body 1311. Alternatively, the filtering member 1316 may be a filter including at least one of a dust removing filter, an oil removing filter, and a water removing filter, so as to remove impurities, oil stains, moisture, and the like in the compressed air, thereby ensuring that the compressed air is clean to meet the nitrogen production requirement.

In some embodiments, the air processing assembly 130 may further include a third processing branch 133, a fourth processing branch 134 and an air buffer container 135, the third processing branch 133 is connected between the air outlet end of the first air compressor assembly 110 and the air buffer container 135, the fourth processing branch 134 is connected between the air outlet end of the second air compressor assembly 120 and the air buffer container 135, and the air outlet end of the air buffer container 135 is connected to the first processing branch 131 and the second processing branch 132, respectively.

It is understood that the third processing branch 133 and the fourth processing branch 134 can process the compressed air respectively, and the two are in parallel. Based on this, when the first air compressor set 110 is in operation, the compressed air output by the first air compressor set 110 may be processed through the third processing branch 133; when the second air compressor set 120 works, the compressed air output by the second air compressor set 120 can be processed through the fourth processing branch 134; when the first air compressor set 110 and the second air compressor set 120 are both operating, the compressed air may be processed by the third processing branch 133 and the fourth processing branch 134, respectively.

The air buffer container 135 may be an air buffer tank, which may enrich buffer the compressed air. The compressed air passing through the air buffer container 135 may be re-processed in the first processing branch 131 and/or the second processing branch 132 to make the compressed air meet the nitrogen gas making requirement.

In consideration of the temperature rise of the compressed air, each of the third and fourth processing branches 133 and 134 may include a heat discharging member 1333 and a second branch body 1331, and the heat discharging member 1333 is disposed at the second branch body 1331. Thus, when the compressed air flows through the second branch body 1331, the temperature of the compressed air may be reduced by the heat dissipation member 1333, so as to ensure that the temperature of the compressed air is not too high.

In addition, in order to prevent oil and gas from being contained in the compressed air, the third processing branch 133 and the fourth processing branch 134 may each include an oil and gas separating member 1332, and the oil and gas separating member 1332 is disposed on the second branch body 1331. As such, when the compressed air flows through the second branch body 1331, oil and gas in the compressed air may be separated by the oil and gas separating member 1332 to prevent the oil and gas from affecting the production of nitrogen.

In order to control the on/off of the second branch body 1331, the third processing branch 133 and the fourth processing branch 134 may each include a third on/off valve 1334, and the third on/off valve 1334 is disposed on the second branch body 1331, so that the on/off of the second branch body 1331 is controlled by opening and closing the third on/off valve 1334.

In addition, a second check valve 1335 is further provided at the second bypass body 1331, and the compressed air in the air buffer container 135 may be prevented from flowing backward by the second check valve 1335.

In some embodiments, a third on/off valve 1334 and a second check valve 1335 are sequentially provided to the second branch body 1331 in a flow direction of the compressed air, and the oil-gas separating member 1332 and the heat radiating member 1333 are both located between the first air compressor group 110 or the second air compressor group 120 and the third on/off valve 1334.

Based on the above arrangement, when the third on/off valve 1334 of the third processing branch 133 is opened, the compressed air output by the first air compressor set 110 is cooled and oil-gas separated by the heat dissipation member 1333 and the oil-gas separation member 1332, so as to ensure that the temperature of the compressed air is not too high and does not contain oil gas, thereby meeting the actual requirement; when the third on/off valve 1334 of the fourth processing branch 134 is opened, the compressed air output by the second air compressor set 120 is cooled and oil-gas separated by the heat dissipation member 1333 and the oil-gas separation member 1332, so as to ensure that the temperature of the compressed air is not too high and does not contain oil gas, thereby meeting the actual requirement. The specific process and the effect achieved when the third on/off valve 1334 of the third processing branch 133 and the fourth processing branch 134 are opened are substantially similar to those described above.

In some embodiments, the air treatment assembly 130 may further include a heating branch 136, a communication branch 137 and a second switching valve 138, wherein the second switching valve 138 has an inlet, a first outlet and a second outlet, the first treatment branch 131 and the second treatment branch 132 are both connected to the inlet, one end of the heating branch 136 is connected to the first outlet, the other end of the heating branch 136 is connected to the air delivery pipe 400, one end of the communication branch 137 is connected to the second outlet, and the other end of the communication branch 137 is connected to the air delivery pipe 400.

Optionally, the heating branch 136 may be provided with a heater, which may adjust the heating power, thereby achieving adjustment of the heating temperature. It should be noted that, the specific structure of the heater and the power regulation principle thereof can refer to the prior art, and are not described herein again.

Based on the above arrangement, the second switching valve 138 can switch the heating branch 136 or the communicating branch 137 to communicate with the air delivery pipeline 400, specifically, when the compressed air needs to be heated, the second switching valve 138 is switched to the first outlet to be opened, so that the compressed air flows in from the inlet and flows out from the first outlet, then passes through the heating branch 136, is heated by the heating branch 136, so that the compressed air keeps the preset temperature, and the compressed air meeting the temperature requirement is delivered to the nitrogen gas production equipment by the air delivery pipeline 400; when heating is not needed, the second switching valve 138 is switched to the second outlet and opened, so that the compressed air flows in from the inlet and flows out from the second outlet, then flows into the air conveying pipeline 400 through the communication branch 137, and is conveyed to the nitrogen gas preparation equipment through the air conveying pipeline 400.

In order to realize the automatic control of the opening and closing process of the second switching valve 138, the nitrogen generation system may further include a first temperature detecting element 820, and the first temperature detecting element 820 is disposed on the air conveying pipeline 400 and is in signal connection with the second switching valve 138. Alternatively, the first temperature detection element 820 may be a temperature sensor or the like.

Based on the above setting, the temperature of the compressed air in the air delivery pipeline 400 is detected in real time by the first temperature detection element 820, when the temperature is lower than the lowest value of the preset temperature range, the first temperature detection element 820 sends a signal to the second switching valve 138 to open the first outlet, so that the compressed air is heated by the heating branch 136 and then delivered to the nitrogen gas production equipment through the air delivery pipeline 400, and when the temperature of the compressed air is increased to the highest value of the preset temperature range, the first temperature detection element 820 sends a signal to the second switching valve 138 to open the second outlet and close the first outlet; when the temperature is within the preset temperature range, the first temperature detecting element 820 does not send a signal to the second switching valve 138, and the second switching valve 138 keeps the second outlet open, so that the compressed air directly flows through the communicating branch 137 and is delivered to the nitrogen gas producing device 200 through the air delivery pipeline 400.

In order to detect the pressure of the compressed air, the nitrogen generation system may further include a first pressure detecting element 830, and the first pressure detecting element 830 is disposed on the air delivery pipe 400 and is in signal connection with the first air compressor set 110 and the second air compressor set 120, respectively. Alternatively, the first pressure detecting element 830 may be a pressure sensor.

Based on the above arrangement, when the first air compressor set 110 operates alone, the pressure of the compressed air in the air delivery pipe 400 can be detected in real time by the first pressure detecting element 830; when the pressure is lower than the preset range (e.g., P1 to P2), the first pressure detecting element 830 sends a signal to the second air compressor set 120 to start the second air compressor set 120 to operate together with the first air compressor set 110, so that the output pressure can be increased after the first air compressor set 110 and the second air compressor set 120 operate in parallel, thereby satisfying the requirement of entering the membrane and improving the nitrogen separation efficiency to a certain extent.

In addition, in the case where the first air compressor set 110 operates alone, when the pressure is detected to be greater than the preset range, the first pressure detecting element 830 transmits a signal to the first air compressor set 110 to cause the first air compressor set 110 to reduce the operating power, thereby reducing the pressure of the compressed air.

In order to detect the operation state of the air compressor set, the nitrogen generation system may further include an air compressor set operation parameter detection element 840, and the air compressor set operation parameter detection element 840 is in signal connection with the first air compressor set 110 and the second air compressor set 120, respectively. Alternatively, the air compressor set operation parameter detecting element 840 may be a speed sensor, a vibration sensor, a torque sensor, or the like, so as to correspond to an operation parameter when the air compressor set is tested to operate.

Based on the above setting, when the first air compressor unit 110 operates and the operating parameters of the first air compressor unit are detected to be obviously abnormal, the first air compressor unit 110 and the second air compressor unit 120 can be respectively sent with signals to control the first air compressor unit 110 to stop and the second air compressor unit 120 to start, so that uninterrupted operation can be realized, the operating stability of the whole equipment is ensured, and the nitrogen making efficiency is improved.

In order to adjust the purity of the produced nitrogen gas, the nitrogen production system may further include an oxygen concentration analyzing unit 850 and a nitrogen purity adjusting valve 510, the oxygen concentration analyzing unit 850 is disposed on the nitrogen gas delivery line 500, the nitrogen purity adjusting valve 510 is disposed on the nitrogen gas delivery line 500, and the oxygen concentration analyzing unit 850 is in signal connection with the nitrogen purity adjusting valve 510.

Based on the above arrangement, the concentration of oxygen in the produced nitrogen gas can be detected by the oxygen concentration analyzing element 850, so that the concentration of nitrogen gas can be known, and thus, the purity of nitrogen gas can be obtained. When the purity of the nitrogen does not meet the preset purity requirement, the oxygen concentration analyzing element 850 sends a signal to the nitrogen purity adjusting valve 510, so that the nitrogen purity adjusting valve 510 adjusts the degree of opening and closing, thereby realizing the adjustment of the nitrogen purity.

In order to prevent nitrogen gas with purity not meeting the requirement from entering the nitrogen gas pressurizing device 300, the nitrogen making system may further include a third switching valve 520, a venting device 700, and an oxygen concentration analyzing element 850, wherein the venting device 700 is connected to a venting port of the third switching valve 520, and the oxygen concentration analyzing element 850 is disposed on the nitrogen gas conveying line 500 and is in signal connection with the third switching valve 520.

Based on the above arrangement, when the purity of the nitrogen gas does not satisfy the requirement, the oxygen concentration analyzing element 850 sends a signal to the third switching valve 520 to switch it to a state in which the purge port is opened, so that the nitrogen gas that does not satisfy the purity requirement flows to the purge device 700 through the purge port and is safely discharged through the purge device 700. In contrast, when the purity of the nitrogen gas satisfies the requirement, the oxygen concentration analyzing unit 850 does not send a signal to the third switching valve 520, and the third switching valve 520 is switched to the communication state to connect the nitrogen gas delivery line 500, so that the nitrogen gas is delivered to the nitrogen gas pressurization device 300 for pressurization processing.

In addition, the nitrogen gas conveying pipeline 500 may further be provided with a pressure sensor, a temperature sensor, and a flow sensor to detect data such as pressure, temperature, and flow of nitrogen gas in real time.

In addition, a nitrogen buffer container 530, such as a nitrogen buffer tank, may be disposed on the nitrogen delivery line 500 to collect nitrogen, and the nitrogen entering the nitrogen pressurizing apparatus 300 may be buffered. Of course, the nitrogen buffer container 530 may not be provided, and the gas may be directly supplied.

In some embodiments, the nitrogen generation system may further include an exhaust pipe 600, and the exhaust pipe 600 is connected to the respective outlet ends of the first nitrogen compressor unit 310 and the second nitrogen compressor unit 320 to transport the pressurized nitrogen.

In order to detect the temperature of the pressurized nitrogen gas, the nitrogen generation system may further include a second temperature detecting element 870, and the second temperature detecting element 870 is disposed in the exhaust pipe 600 and is in signal connection with the first nitrogen compressor set 310 and the second nitrogen compressor set 320, respectively. Alternatively, the second temperature detection element 870 may be a temperature sensor or the like.

Based on the above arrangement, when the first nitrogen compressor set 310 is running, the temperature of the nitrogen gas in the exhaust pipeline 600 is detected in real time by the second temperature detecting element 870, and when the temperature does not meet the preset temperature range (e.g., exceeds the ambient temperature by 10 ℃ to 15 ℃), it is indicated that the first nitrogen compressor set 310 is running abnormally, at this time, the second temperature detecting element 870 sends a signal to the first nitrogen compressor set 310 and the second nitrogen compressor set 320, respectively, so that the first nitrogen compressor set 310 is stopped, and the second nitrogen compressor set 320 is started, so that the nitrogen gas supercharging device 300 can run uninterruptedly, and the nitrogen gas supercharging efficiency is ensured.

In order to detect the pressure of the pressurized nitrogen gas, the nitrogen generation system may further include a second pressure detecting element 860, and the second pressure detecting element 860 is disposed in the exhaust line 600 and is in signal connection with the first nitrogen compressor set 310 and the second nitrogen compressor set 320, respectively. Alternatively, the second pressure sensing element 860 may be a pressure sensor.

Based on the above arrangement, when the first nitrogen compressor set 310 operates, the pressure of the nitrogen in the exhaust pipeline 600 is detected in real time through the second pressure detecting element 860, and when the pressure does not meet the preset pressure, it indicates that the first nitrogen compressor set 310 operates abnormally, at this time, the second pressure detecting element 860 sends signals to the first nitrogen compressor set 310 and the second nitrogen compressor set 320 respectively, so that the first nitrogen compressor set 310 stops, and the second nitrogen compressor set 320 starts, so that the nitrogen supercharging device 300 can operate uninterruptedly, and the nitrogen supercharging efficiency is ensured.

In some embodiments, the first nitrogen branch 330 is connected to the air outlet of the first nitrogen compressor set 310, and the second nitrogen branch 340 is connected to the air outlet of the second nitrogen compressor set 320, so that the nitrogen gas pressurized by the first nitrogen compressor set 310 can be output through the first nitrogen branch 330, and the nitrogen gas pressurized by the second nitrogen compressor set 320 can be output through the second nitrogen branch 340.

In order to prevent the undesirable nitrogen from being delivered to the next process, the nitrogen making system may further include a venting device 700, wherein the first nitrogen branch 330 and the second nitrogen branch 340 are both connected to the exhaust pipe 600, the first nitrogen branch 330 and the second nitrogen branch 340 are both provided with a fourth switching valve 331, and venting ports of the fourth switching valves 331 of the first nitrogen branch 330 and the second nitrogen branch 340 are both connected to the venting device 700.

Based on the above arrangement, under the operation condition of the first nitrogen compressor set 310, when the pressurized nitrogen does not meet the preset requirement, for example, the parameters such as pressure and temperature do not meet the preset requirement, the fourth switching valve 331 of the first nitrogen branch 330 may be switched to the state where the vent port is opened, so that the nitrogen pressurized by the first nitrogen compressor set 310 flows into the venting device 700, and is safely discharged through the venting device 700. When the pressurized nitrogen meets the preset requirement, the nitrogen flows into the exhaust pipe 600 through the first nitrogen branch 330 to be delivered backwards through the exhaust pipe 600.

Of course, in the case that the second nitrogen press unit 320 operates, or both the first nitrogen press unit 310 and the second nitrogen press unit 320 operate, the specific principle thereof may refer to the principle of the operation of the first nitrogen press unit 310, and details are not described herein.

In addition, the nitrogen making system in the embodiment of the application can further comprise a control device, wherein the control device is respectively in signal connection with each detection element, each switching valve and the like, so as to receive signals through the control device and send out control signals to control the action of the switching valves.

Based on this, the operation of the air treatment device 100, the nitrogen gas production device 200 and the nitrogen gas pressurization device 300 can be effectively realized through the control device, so that the stability of control can be improved, and the automatic control of the nitrogen production system is realized.

The nitrogen making system in the embodiment of the application can be applied to ocean platform equipment, and for the hoisting convenience, the air treatment device 100 and the nitrogen preparing device 200 and the nitrogen supercharging device 300 can be arranged by adopting a single sledge respectively, so that the three parts can be disassembled and assembled, the flexible use is facilitated, and the working conditions of limited space and limited hoisting are met.

To sum up, the air treatment device 100 and the nitrogen pressurization device 300 in the embodiment of the present application both adopt a "one-by-one" mode, so that different working modes can be switched under different conditions, and further multiple working conditions can be adapted to, and normal operation of a nitrogen generation system is ensured.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A nitrogen generation system, comprising: an air processing device (100), a nitrogen gas preparation device (200) and a nitrogen gas pressurization device (300);

the air treatment device (100) comprises a first air compressor unit (110), a second air compressor unit (120) and an air treatment assembly (130), wherein the first air compressor unit (110) and the second air compressor unit (120) are arranged in parallel, air outlet ends of the first air compressor unit and the second air compressor unit are connected with the air treatment assembly (130), and an air outlet end of the air treatment assembly (130) is connected with the nitrogen gas preparation device (200) through an air conveying pipeline (400);

the nitrogen pressurization device (300) comprises a first nitrogen compressor set (310) and a second nitrogen compressor set (320), wherein the first nitrogen compressor set (310) and the second nitrogen compressor set (320) are arranged in parallel, and respective air inlet ends of the first nitrogen compressor set and the second nitrogen compressor set are connected with the nitrogen preparation device (200) through a nitrogen conveying pipeline (500).

2. The nitrogen production system according to claim 1, wherein the air treatment assembly (130) comprises a first treatment branch (131) and a second treatment branch (132), the first treatment branch (131) being arranged in parallel with the second treatment branch (132) and both being connected to the air delivery line (400);

the first processing branch (131) and the second processing branch (132) each comprise a first branch body (1311), and a first on-off valve (1312) and a blotting member (1313) provided to the first branch body (1311);

the nitrogen production system further comprises a dew point analysis element (810) and a venting device (700), wherein the dew point analysis element (810) is arranged on the air conveying pipeline (400);

a first switching valve (410) is arranged on the air conveying pipeline (400) and positioned at the downstream of the dew point analysis element (810), and the emptying device (700) is connected to an emptying port of the first switching valve (410);

the dew point analyzing element (810) is in signal connection with the first switching valve (1312) and the first switching valve (410) of the first processing branch (131) and the second processing branch (132), respectively.

3. The nitrogen-making system according to claim 2, wherein the first treatment branch (131) and the second treatment branch (132) each comprise a second on-off valve (1314) and a first one-way valve (1315), the second on-off valve (1314) being disposed at the first branch body (1311) and at a side of the blotting member (1313) facing away from the first on-off valve (1312), the first one-way valve (1315) being disposed at the first branch body (1311) and at a side of the second on-off valve (1314) facing away from the blotting member (1313);

and/or the first processing branch (131) and the second processing branch (132) each comprise a filtering member (1316), the filtering member (1316) being provided to the first branch body (1311).

4. The nitrogen generation system of claim 2, wherein the air treatment assembly (130) further comprises a third treatment branch (133), a fourth treatment branch (134), and an air buffer container (135);

the third processing branch (133) is connected between the air outlet end of the first air compressor unit (110) and the air buffer container (135), and the fourth processing branch (134) is connected between the air outlet end of the second air compressor unit (120) and the air buffer container (135);

the air outlet end of the air buffer container (135) is respectively connected with the first processing branch (131) and the second processing branch (132).

5. The nitrogen generation system of claim 4, wherein the third treatment branch (133) and the fourth treatment branch (134) each comprise a second branch body (1331), an oil-gas separation member (1332), a heat sink member (1333), a third on/off valve (1334), and a second one-way valve (1335);

the third on/off valve (1334) and the second check valve (1335) are sequentially provided to the second branch body (1331) in a flow direction of air;

the oil-gas separation component (1332) and the heat dissipation component (1333) are arranged on the second branch body (1331) and are located between the first air compressor unit (110) or the second air compressor unit (120) and the third switch valve (1334).

6. The nitrogen generation system of claim 2, wherein the air treatment assembly (130) further comprises a heating branch (136), a communication branch (137), and a second switching valve (138);

the second switching valve (138) is provided with an inlet, a first outlet and a second outlet, the first processing branch (131) and the second processing branch (132) are connected with the inlet, one end of the heating branch (136) is connected with the first outlet, the other end of the heating branch (136) is connected with the air conveying pipeline (400), one end of the communication branch (137) is connected with the second outlet, and the other end of the communication branch (137) is connected with the air conveying pipeline (400);

the nitrogen production system further comprises a first temperature detection element (820), wherein the first temperature detection element (820) is arranged on the air conveying pipeline (400) and is in signal connection with the second switching valve (138).

7. The nitrogen generation system according to claim 1, further comprising a first pressure detection element (830), wherein the first pressure detection element (830) is disposed on the air delivery line (400) and is in signal connection with the first air compressor unit (110) and the second air compressor unit (120), respectively;

or, the nitrogen making system further comprises an air compressor set operation parameter detection element (840), and the air compressor set operation parameter detection element (840) is in signal connection with the first air compressor set (110) and the second air compressor set (120) respectively.

8. The nitrogen generation system of claim 1, further comprising an oxygen concentration analysis element (850) and a nitrogen purity adjustment valve (510);

the oxygen concentration analysis element (850) is arranged on the nitrogen conveying pipeline (500), the nitrogen purity regulating valve (510) is arranged on the nitrogen conveying pipeline (500), and the oxygen concentration analysis element (850) is in signal connection with the nitrogen purity regulating valve (510);

and/or, the nitrogen making system further comprises a third switching valve (520), a venting device (700) and an oxygen concentration analysis element (850), wherein the venting device (700) is connected to a venting port of the third switching valve (520), and the oxygen concentration analysis element (850) is arranged on the nitrogen conveying pipeline (500) and is in signal connection with the third switching valve (520).

9. The nitrogen generation system according to claim 1, further comprising an exhaust line (600), wherein the exhaust line (600) is connected to respective outlet ends of the first nitrogen press unit (310) and the second nitrogen press unit (320);

the nitrogen generation system further comprises a second temperature detection element (870), wherein the second temperature detection element (870) is arranged on the exhaust pipeline (600) and is in signal connection with the first nitrogen compressor set (310) and the second nitrogen compressor set (320) respectively;

and/or, the nitrogen production system further comprises a second pressure detection element (860), and the second pressure detection element (860) is arranged in the exhaust pipeline (600) and is respectively in signal connection with the first nitrogen compressor set (310) and the second nitrogen compressor set (320).

10. The nitrogen generation system of claim 1, wherein the outlet end of the first nitrogen press group (310) is connected with a first nitrogen branch (330), and the outlet end of the second nitrogen press group (320) is connected with a second nitrogen branch (340);

nitrogen system still includes exhaust pipe way (600) and venting device (700), first nitrogen gas branch road (330) with second nitrogen gas branch road (340) all with exhaust pipe way (600) are connected, first nitrogen gas branch road (330) and second nitrogen gas branch road (340) all are equipped with fourth switching valve (331), first nitrogen gas branch road (330) with second nitrogen gas branch road (340) are respective the venting port of fourth switching valve (331) all with venting device (700) are connected.

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