Drainage device for nitrogen making machine and nitrogen making machine

Abstract

The utility model discloses a drainage device for a nitrogen making machine and the nitrogen making machine, the drainage device comprises a control panel and further comprises a cooling and filtering mechanism, and the cooling and filtering mechanism comprises a condenser, an air tank and a filter which are sequentially communicated through a pipeline assembly along the gas flow direction; the detection adjusting mechanism comprises a temperature and humidity sensor, a cooling fan and a drainage electromagnetic valve which are electrically connected with the control panel, and the temperature and humidity sensor is connected with the air outlet end of the filter; the temperature and humidity sensor can control the opening and closing of the drainage electromagnetic valve; the rotating speed of the cooling fan can be adjusted and set according to the temperature and humidity sensor; the drainage mechanism comprises a drainage pipeline assembly, and the drainage pipeline assembly is provided with a one-way valve to prevent condensate water in the drainage pipeline assembly from flowing back to the pipeline at the lower pressure end. The rotating speed of the heat dissipation fan is adjusted according to the collected temperature data, the temperature of gas entering the molecular sieve is reduced, and the nitrogen generation efficiency is improved; according to the collected humidity data, the drainage electromagnetic valve is opened, and it is ensured that condensate water is drained in time.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen production equipment, in particular to a drainage device for a nitrogen generator and the nitrogen generator. Background Art

[0002] At present, drainage holes are arranged at the gas outlet end of the condenser and the bottom of the air tank of the nitrogen generator, and then connected to an electronic drain valve for timed drainage. This drainage method has certain defects, such as:

[0003] First, the drainage holes at the gas outlet end of the condenser and the bottom of the air tank are connected to the same electronic drain valve for drainage. There is a situation where the bottom pressures at the gas outlet end bottom of the condenser and the bottom of the air tank are inconsistent. When draining water, the air flow rushes towards the end with lower pressure, and at the same time, the condensed water is also brought into the end with lower pressure, and the condensed water accumulates and cannot be discharged normally. Using two electronic drain valves will cause waste.

[0004] Second, the timed drain valve is not controlled by a program. There is a situation where the shutdown time of the equipment happens to be at the critical value when the electronic drain valve is about to open. At this time, the electronic drain valve has not reached the opening time yet, and the equipment has stopped and powered off, and the condensed water has not been discharged. When starting the machine next time, the electronic drain valve starts timing again, resulting in draining water once every two cycles. Since the opening duration of the timed drain valve is fixed, in the above situation, the condensed water generated in two cycles cannot be completely discharged, the humidity of the compressed air entering the molecular sieve increases, affecting the service life of the molecular sieve, and the nitrogen dew point rises.

[0005] Third, the opening interval of the electronic drain valve is a fixed value. Due to environmental changes, when the environmental humidity is high, the electronic drain valve should make corresponding adjustments.

[0006] Fourth, the fan cannot be intelligently adjusted according to the temperature of the gas entering the molecular sieve and cannot increase the rotation speed in time to cool down, so that the whole equipment is in the best process state. Content of the Utility Model

[0007] In order to solve the above technical problems, the utility model provides a drainage device for a nitrogen generator, including a control board, and further including:

[0008] A cooling and filtering mechanism, including a condenser, an air tank and a filter that are connected in sequence along the gas flow direction through a pipeline assembly;

[0009] A detection and adjustment mechanism, including a temperature and humidity sensor, a cooling fan and a drain solenoid valve that are respectively electrically connected to the control board. The temperature and humidity sensor is connected to the gas outlet end of the filter; the temperature and humidity sensor can control the opening and closing of the drain solenoid valve; the rotation speed of the cooling fan can be adjusted according to the temperature and humidity sensor; and

[0010] The drainage mechanism includes a drainage pipeline assembly, and the drainage pipeline assembly is configured with a check valve to prevent the condensate water in the drainage pipeline assembly from flowing back to the pipeline at the lower pressure end.

[0011] Furthermore, the air inlet end of the condenser is connected and communicated with the air outlet end of the compressor; the pipeline assembly includes:

[0012] A first pipeline connecting the compressor and the condenser;

[0013] A second pipeline connecting the condenser and the air tank;

[0014] A third pipeline connecting the air tank and the filter;

[0015] A fourth pipeline connecting the filter and the temperature and humidity sensor.

[0016] Furthermore, the drainage pipeline assembly includes a condenser drainage pipeline, an air tank drainage pipeline, and a filter drainage pipeline, where:

[0017] The condenser drainage pipeline is the pipeline connecting the air outlet end of the condenser and the drainage solenoid valve;

[0018] The air tank drainage pipeline is the pipeline connecting the air outlet end of the air tank and the drainage solenoid valve;

[0019] The filter drainage pipeline is the pipeline connecting the air outlet end of the filter and the drainage solenoid valve.

[0020] Furthermore, the condenser drainage pipeline, the air tank drainage pipeline, and the filter drainage pipeline are all configured with the check valve. The check valve is connected and communicated with the drainage solenoid valve through a four-way joint for drainage, and the check valve is arranged close to the four-way joint.

[0021] Furthermore, a condenser drainage hole is opened at the bottom of the air outlet end of the condenser, and the condenser is an aluminum plate-fin heat exchanger.

[0022] Furthermore, an air tank drainage hole is opened at the bottom of the air outlet end of the air tank.

[0023] Furthermore, the cooling fan is fixedly installed with the condenser.

[0024] Furthermore, the drainage solenoid valve is a normally closed solenoid valve.

[0025] A nitrogen generator is applied with the drainage device for the nitrogen generator.

[0026] Further, the nitrogen generator includes a blowdown port and a process tank pipeline; wherein, the water outlet end of the drain solenoid valve is communicated with the blowdown port; the gas outlet end of the temperature and humidity sensor is communicated with the process tank pipeline.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The utility model collects the temperature of the gas entering the molecular sieve through the temperature and humidity sensor, thereby adjusting the rotation speed of the cooling fan to ensure the temperature of the gas entering the molecular sieve, making the whole nitrogen production in a better process state and improving the nitrogen production efficiency; at the same time, the drain solenoid valve is controlled by a program and can drain water according to the humidity inside the nitrogen generator, achieving timely and thorough drainage; equipped with a check valve, effectively preventing the condensate from flowing back to the pipeline with lower pressure due to unbalanced air pressure, ensuring thorough drainage, preventing the condensate from accumulating, and reducing the nitrogen dew point. Description of the Drawings

[0029] Figure 1 It is a pipeline schematic diagram of the overall structure disclosed in the embodiment of the utility model.

[0030] In the figure:

[0031] 101, condenser; 1010, condenser drain hole; 102, air tank; 1020, air tank drain hole; 103, filter; 104, first pipeline; 105, second pipeline; 106, third pipeline; 107, fourth pipeline;

[0032] 201, temperature and humidity sensor; 202, cooling fan; 203, drain solenoid valve;

[0033] 301, condenser drain pipeline; 302, air tank drain pipeline; 303, filter drain pipeline; 304, check valve; 305, four-way joint;

[0034] 401, compressor; 402, blowdown port; 403, process tank pipeline. Detailed Embodiments

[0035] To make the technical solutions and technical effects of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments.

[0036] The utility model aims to provide a drainage device for a nitrogen generator, ensuring that the drainage of the bottom of the air outlet end of the condenser, the bottom of the air tank, and the filter does not interfere with each other, and can timely and thoroughly discharge the condensed liquid water during the normal operation of the nitrogen generator outside the device, preventing the excessive accumulation of moisture inside the device from affecting the nitrogen dew point. The drainage device mainly includes a control board, and also includes a cooling and filtering mechanism, a detection and adjustment mechanism, and a drainage mechanism. Refer to Figure 1 , and the following is a specific introduction to it:

[0037] Cooling and filtering mechanism: The cooling and filtering mechanism includes a condenser 101, an air tank 102, and a filter 103 that are connected in sequence along the gas flow direction through a pipeline assembly. Among them, the air outlet end of the compressor 401 is connected to the condenser 101, the condenser 101 is connected to the air tank 102, the air outlet end of the air tank 102 is connected to the filter 103, the filter 103 is connected to the temperature and humidity sensor 201, and the gas from the temperature and humidity sensor 201 enters the molecular sieve through the pipeline 403 connecting to the process tank for normal nitrogen production process. Specifically, a condenser drainage hole 1010 is opened at the bottom of the air outlet end of the condenser 101, and the condenser 101 is an aluminum plate fin heat exchanger. The air tank 102 is used to store compressed air, and an air tank drainage hole 1020 is opened at the bottom of the air outlet end of the air tank 102. The filter 103 is mainly used to filter large particle water droplets in the compressed air. The filter element accuracy of the filter 103 is 5um, with high water removal efficiency, and the rated flow meets the requirements, without causing large gas volume loss. Further, the pipeline assembly includes: a first pipeline 104 connecting the compressor 401 and the condenser 101; a second pipeline 105 connecting the condenser 101 and the air tank 102; a third pipeline 106 connecting the air tank 102 and the filter 103; a fourth pipeline 107 connecting the filter 103 and the temperature and humidity sensor 201. The first pipeline 104, the second pipeline 105, the third pipeline 106, and the fourth pipeline 107 are all made of stainless steel material, which is beneficial to heat dissipation.

[0038] Detection and adjustment mechanism: The detection and adjustment mechanism includes a temperature and humidity sensor 201, a cooling fan 202, and a drain solenoid valve 203 that are respectively electrically connected to the control board. The temperature and humidity sensor 201 is connected to the outlet end of the filter 103; the temperature and humidity sensor 201 can control the opening and closing of the drain solenoid valve 203; the rotation speed of the cooling fan 202 can be adjusted according to the temperature and humidity sensor 201. The drain solenoid valve 203 is normally closed when it does not receive a drainage instruction, preventing compressed air from flowing away through the solenoid valve and affecting the nitrogen production efficiency. The opening of the drain solenoid valve 203 and the humidity information are in closed-loop control. When the gas humidity is detected to be greater than the set value for the first time, the drainage process ends, and it is timed and detected again for 3 minutes. If the humidity has not decreased, the drain solenoid valve 203 will be opened again, and this will be repeated until the detected humidity drops below the set value. When shutting down normally, when the equipment receives a shutdown instruction, the program controls the drain solenoid valve 203 to open again for drainage, which can ensure that the condensate inside the equipment is discharged during the process from receiving the shutdown instruction to power-off, thus ensuring that there is no condensate residue inside the equipment during the power-off storage stage. Further, the temperature and humidity sensor 201 is installed on the pipeline at the outlet end of the filter 103 by threading. The temperature and humidity sensor 201 is electrically connected to the control board and feeds back the temperature and humidity data in the pipeline to the control board. The cooling fan 202 is fixedly installed with the condenser 101, and the cooling fan 202 is an adjustable-speed fan. The drain solenoid valve 203 is a normally closed solenoid valve capable of draining water. When the equipment receives a shutdown instruction, the program controls the drain solenoid valve 203 to open again for drainage, which can ensure that the condensate inside the equipment is discharged during the process from receiving the shutdown instruction to power-off. The drain solenoid valve 203 can be opened for drainage according to the humidity data collected by the temperature and humidity sensor 201 to ensure timely discharge of condensate; the rotation speed of the cooling fan 202 can be adjusted according to the temperature data collected by the temperature and humidity sensor 201 to reduce the temperature of the gas entering the molecular sieve, so that the entire nitrogen production system is in an optimal process state.

[0039] Drainage mechanism: The drainage mechanism includes a drainage pipeline assembly, which is configured with a check valve 304 to prevent the condensate in the drainage pipeline assembly from flowing back to the pipeline at the lower pressure end. Specifically, the drainage pipeline assembly includes a condenser drainage pipeline 301, an air tank drainage pipeline 302, and a filter drainage pipeline 303, where: The condenser drainage pipeline 301 is a pipeline connecting the outlet end of the condenser 101 and the drainage solenoid valve 203; The air tank drainage pipeline 302 is a pipeline connecting the outlet end of the air tank 102 and the drainage solenoid valve 203; The filter drainage pipeline 303 is a pipeline connecting the outlet end of the filter 103 and the drainage solenoid valve 203. Further, the condenser drainage pipeline 301, the air tank drainage pipeline 302, and the filter drainage pipeline 303 are all configured with check valves 304. The check valves 304 are connected to the drainage solenoid valve 203 through the same four-way joint 305 for drainage, and the check valves 304 are arranged as close as possible to the four-way joint 305. The function of the check valve 304 is to prevent the pressures of the condenser 101, the air tank 102, and the filter 103 from being inconsistent during the operation of the equipment, so that the air flow rushes towards the end with lower pressure, and at the same time, the condensate is brought into the end with lower pressure together, and the condensate accumulates and cannot be discharged normally.

[0040] During operation, the high-temperature and high-pressure gas passes through the condenser 101, and the decrease in gas temperature will condense into liquid water, which exists at the outlet end of the condenser 101. The gas then enters the air tank 102, and under the action of pressure, part of the water will concentrate at the bottom of the air tank 102. Through the above steps, most of the water in the gas can be separated out, and then the remaining water is removed through the filter 103. The condenser drainage pipeline 301, the air tank drainage pipeline 302, and the filter drainage pipeline 303 are connected to the drainage solenoid valve 203 for drainage through the check valves 304 on their respective pipelines and then through a four-way joint 305.

[0041] The present utility model also protects a nitrogen generator, which applies the above-mentioned drainage device for a nitrogen generator. The nitrogen generator includes a sewage discharge port 402 and a process tank pipeline 403; among them, the water outlet end of the drainage solenoid valve 203 is connected to the sewage discharge port 402; the air outlet end of the temperature and humidity sensor 201 is connected to the process tank pipeline 403.

[0042] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A drainage device for a nitrogen generator, comprising a control board, characterized in that, It further includes: A cooling and filtering mechanism, including a condenser (101), an air tank (102), and a filter (103) that are connected in sequence along the gas flow direction through a pipeline assembly; A detection and adjustment mechanism, including a temperature and humidity sensor (201), a cooling fan (202), and a drain solenoid valve (203) that are respectively electrically connected to the control board. The temperature and humidity sensor (201) is connected to the outlet end of the filter (103); the temperature and humidity sensor (201) can control the opening and closing of the drain solenoid valve (203); the rotation speed of the cooling fan (202) can be adjusted and set according to the temperature and humidity sensor (201); and A drainage mechanism, including a drainage pipeline assembly, and the drainage pipeline assembly is configured with a check valve (304) to prevent the condensed water in the drainage pipeline assembly from flowing back to the pipeline with a lower pressure.

2. The drainage device for a nitrogen generator according to claim 1, wherein, The inlet end of the condenser (101) is connected to the outlet end of the compressor (401); the pipeline assembly includes: A first pipeline (104) connecting the compressor (401) and the condenser (101); A second pipeline (105) connecting the condenser (101) and the air tank (102); A third pipeline (106) connecting the air tank (102) and the filter (103); A fourth pipeline (107) connecting the filter (103) and the temperature and humidity sensor (201).

3. The drainage device for nitrogen generators according to claim 1, characterized in that, The drainage pipeline assembly includes a condenser drainage pipeline (301), an air tank drainage pipeline (302), and a filter drainage pipeline (303), where: The condenser drainage pipeline (301) is a pipeline connecting the outlet end of the condenser (101) and the drain solenoid valve (203); The air tank drainage pipeline (302) is a pipeline connecting the outlet end of the air tank (102) and the drain solenoid valve (203); The filter drainage pipeline (303) is a pipeline connecting the outlet end of the filter (103) and the drain solenoid valve (203).

4. The drainage device for nitrogen generators according to claim 3, characterized in that, The condenser drainage pipeline (301), the air tank drainage pipeline (302), and the filter drainage pipeline (303) are all configured with the check valve (304). The check valve (304) is connected to the drain solenoid valve (203) through a four-way joint (305) for drainage, and the check valve (304) is arranged close to the four-way joint (305).

5. The drainage device for a nitrogen generator according to claim 1, characterized in that, A condenser drainage hole (1010) is opened at the bottom of the outlet end of the condenser (101), and the condenser (101) is an aluminum plate-fin heat exchanger.

6. The drainage device for a nitrogen generator according to claim 1, wherein, An air tank drainage hole (1020) is opened at the bottom of the outlet end of the air tank (102).

7. The drainage device for nitrogen generators according to claim 1, characterized in that, The cooling fan (202) is fixedly installed with the condenser (101).

8. The drainage device for nitrogen generators according to claim 1, characterized in that, The drain solenoid valve (203) is a normally closed solenoid valve.

9. A nitrogen generator, characterized in that, The nitrogen generator drainage device according to any one of claims 1-7 is applied.

10. The nitrogen generator according to claim 9, wherein, The nitrogen generator includes a blowdown port (402) and a process tank pipeline (403); wherein, the water outlet end of the drain solenoid valve (203) is communicated with the blowdown port (402); the gas outlet end of the temperature and humidity sensor (201) is communicated with the process tank pipeline (403).

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