Nitrogen making machine

Abstract

The embodiment of the utility model provides a nitrogen making machine, which relates to the technical field of nitrogen making equipment, and comprises a PSA (Pressure Swing Adsorption) nitrogen making machine, the PSA nitrogen making machine comprises a pipeline system and two adsorption towers with consistent specifications, sealing plates are fixed at the top ends in the adsorption towers, and rotating holes are formed in the tops of the sealing plates and the tops of the adsorption towers. When the adsorption tower of the nitrogen making machine performs adsorption work, the servo motor drives the output shaft of the reduction gear box to rotate, so that the screw rod obtains relatively large twisting force, and the screw rod enables a molecular sieve to enter the middle cylinder and then be discharged from the middle cylinder in a screw transmission manner, so that the molecular sieve circularly flows in the adsorption tower, and the adsorption efficiency is improved. The molecular sieves are arranged in the adsorption tower, so that airflow entering the adsorption tower can be in uniform contact with the molecular sieves, the phenomenon of local saturation is avoided, and the turbulent flow effect can be started through the flowing molecular sieves, so that the retention time of the airflow in the adsorption tower is prolonged, and the adsorption efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen making equipment, in particular to a nitrogen making machine. Background Art

[0002] In the production of fire extinguishers, a nitrogen generator is needed. The nitrogen produced by the nitrogen generator is liquefied and then injected into the tank of the fire extinguisher. A nitrogen generator refers to a device that uses air as raw material and uses physical methods to separate oxygen and nitrogen in it to obtain nitrogen. The adsorption tower is an indispensable part of the nitrogen generator. The adsorption tower uses the carbon molecular sieve to separate nitrogen and oxygen. It is mainly based on the different diffusion rates of the two gases on the surface of the carbon molecular sieve. The smaller diameter gas (oxygen) diffuses faster and enters more of the molecular sieve solid phase.

[0003] In the existing technology, the gas in the PSA adsorption tower generally passes through the molecular sieve from bottom to top, so the gas first contacts the bottom of the particles inside the molecular sieve, so the molecular sieve at the bottom is easily saturated. At this time, the gas can only contact the molecular sieve above, thus shortening the adsorption time of the airflow in disguise, thereby reducing the adsorption efficiency. Utility Model Content

[0004] The utility model aims to provide a nitrogen generator to solve the problem that the gas in the existing PSA adsorption tower generally passes through the molecular sieve from bottom to top, so the gas first contacts the bottom of the particles inside the molecular sieve, so the molecular sieve at the bottom position is easily saturated, and the gas can only contact the upper molecular sieve at this time, so the adsorption time of the gas flow is shortened in disguise, thereby reducing the adsorption efficiency.

[0005] In a first aspect, the utility model provides a nitrogen generator, including a PSA nitrogen generator, the PSA nitrogen generator including a pipeline system and two adsorption towers of the same specifications, a sealing plate is fixed at the top position in the adsorption tower, a rotation hole is opened at the top of the sealing plate and the top of the adsorption tower, a screw rod is installed on the two rotation holes through a sealing bearing, an intermediate cylinder is sleeved on the outer side of the screw rod, a plurality of connecting rods are arranged between the outer wall of the intermediate cylinder and the inner wall of the adsorption tower to fix the two, a driving assembly is arranged on the top of the adsorption tower, the screw rod is connected to the driving assembly, and the driving assembly controls the screw rod to rotate, and also includes;

[0006] PLC controller, the PLC controller establishes electrical connection with the pipeline system;

[0007] A pre-filter system for pre-treating air, wherein the pre-filter system is connected to an air inlet end of the pipeline system;

[0008] Wherein, a muffler is provided at the exhaust gas end of the pipeline system.

[0009] In a specific embodiment, the drive assembly includes a reduction gearbox and a servo motor, the servo motor is fixed on the reduction gearbox, the output shaft of the servo motor is coaxially fixed with the input shaft of the reduction gearbox, the reduction gearbox is fixed on the top of the adsorption tower, and the output shaft of the reduction gearbox is coaxially fixed with the screw rod.

[0010] In a specific embodiment, a porous plate is fixed at the bottom of the adsorption tower, and a palm mat is fixed above the porous plate in the adsorption tower, and the palm mat does not contact the bottom end of the middle tube.

[0011] In a specific embodiment, molecular sieves are filled between the palm mat and the sealing plate.

[0012] In a specific embodiment, activated alumina particles are filled between the palm mat and the porous plate.

[0013] In a specific embodiment, the pre-filtration system comprises an air filter.

[0014] In a specific embodiment, the pre-filtration further includes a refrigerated dryer connected to the discharge end of the air filter.

[0015] In a specific embodiment, the pre-filtration further comprises a dust tight filter connected to the discharge end of the refrigerated dryer.

[0016] In a specific embodiment, the pre-filtration further comprises an oil mist tight filter connected to the discharge end of the dust tight filter.

[0017] In a specific embodiment, the pre-filtration further comprises a buffer tank communicated with the discharge end of the oil mist tight filter, and the buffer tank is connected to the pipeline system.

[0018] The utility model provides a nitrogen generator. When the adsorption tower performs adsorption work, the servo motor drives the output shaft of the reduction gear box to rotate, so that the screw rod obtains a larger torsional force. The screw rod drives the molecular sieve into the middle cylinder through the spiral transmission form, and then is discharged from the middle cylinder, so that the molecular sieve circulates in the adsorption tower, so that the airflow entering the adsorption tower can be evenly contacted with each molecular sieve, and the phenomenon of local saturation will not occur. The flowing molecular sieve can also start the turbulence effect, thereby increasing the residence time of the airflow in the adsorption tower and improving the adsorption efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall layout structure of an embodiment of the utility model.

[0021] Figure 2 It is a front view structural schematic diagram of the entire embodiment of the utility model.

[0022] Figure 3 The figure is the internal diagram of the adsorption tower of the embodiment of the utility model as a whole.

[0023] Figure 4 It is a cross-sectional view of the adsorption tower of the embodiment of the utility model as a whole.

[0024] Icons: 1-air filter; 2-refrigerated dryer; 3-dust tight filter; 4-oil mist tight filter; 5-buffer tank; 6-PLC controller; 7-PSA nitrogen generator; 8-adsorption tower; 9-reduction gearbox; 10-servo motor; 11-screw rod; 12-connecting rod; 13-intermediate cylinder; 14-mat; 15-molecular sieve; 16-porous plate; 17-sealing plate; 18-pre-filtration system; 19-silencer. DETAILED DESCRIPTION

[0025] Since the gas in the existing PSA adsorption tower generally passes through the molecular sieve from bottom to top, the gas first contacts the bottom of the particles inside the molecular sieve, so the molecular sieve at the bottom position is easily saturated. At this time, the gas can only contact the molecular sieve above, thus shortening the adsorption time of the airflow in disguise, thereby reducing the adsorption efficiency. Therefore, the inventor has provided a nitrogen generator after research. When the adsorption tower is performing adsorption work, the servo motor drives the output shaft of the reduction gear box to rotate, so that the screw rod obtains a larger torsional force. The screw rod drives the molecular sieve into the middle cylinder through the spiral transmission form, and then is discharged from the middle cylinder, so that the molecular sieve circulates in the adsorption tower, so that the airflow entering the adsorption tower can be evenly in contact with each molecular sieve, and no local saturation phenomenon will occur. The flowing molecular sieve can also start the turbulence effect, thereby increasing the residence time of the airflow in the adsorption tower and improving the adsorption efficiency, thereby solving the existing problems.

[0026] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0027] Please refer to Figures 1 to 4 The utility model embodiment provides a nitrogen generator, including a PSA nitrogen generator 7, the PSA nitrogen generator 7 includes a pipeline system and two adsorption towers 8 with the same specifications, the pipeline system of the PSA nitrogen generator 7 is a prior art, and the detailed working principle and structure are not described here, a sealing plate 17 is fixed at the top position in the adsorption tower 8, the top of the sealing plate 17 and the top of the adsorption tower 8 are both provided with a rotating hole, the two rotating holes are equipped with a screw rod 11 through a sealed bearing, the outer side of the screw rod 11 is sleeved with an intermediate cylinder 13, and a plurality of connecting rods 12 are provided between the outer wall of the intermediate cylinder 13 and the inner wall of the adsorption tower 8 to fix the two, a driving assembly is provided on the top of the adsorption tower 8, the driving assembly is arranged on the top of the adsorption tower 8, the screw rod 11 is connected to the driving assembly, and the driving assembly controls the screw rod 11 to rotate, specifically, the driving assembly includes a reduction gear box 9 and a servo motor 10, the servo The motor 10 is fixed on the reduction gear box 9, the output shaft of the servo motor 10 is coaxially fixed with the input shaft of the reduction gear box 9, the reduction gear box 9 is fixed on the top of the adsorption tower 8, and the output shaft of the reduction gear box 9 is coaxially fixed with the screw rod 11. It can be seen that the specific technical scheme is that when the adsorption tower 8 performs adsorption work, the servo motor 10 drives the output shaft of the reduction gear box 9 to rotate, so that the screw rod 11 obtains a larger torsional force, and the screw rod 11 drives the molecular sieve 15 into the intermediate cylinder 13 through the spiral transmission form, and then is discharged from the intermediate cylinder 13, so that the molecular sieve 15 circulates in the adsorption tower 8, so that the airflow entering the adsorption tower 8 can be evenly contacted with each molecular sieve 15, and no local saturation phenomenon occurs. The flowing molecular sieve 15 can also start the turbulence effect, thereby increasing the residence time of the airflow in the adsorption tower 8 and improving the adsorption efficiency, and also includes;

[0028] PLC controller 6, PLC controller 6 establishes electrical connection with the pipeline system;

[0029] A pre-filter system 18 for pre-treating the air, the pre-filter system 18 being connected to the air inlet end of the pipeline system;

[0030] The exhaust gas end of the pipeline system is provided with a silencer 19 for silencing.

[0031] Specifically, a porous plate 16 is fixed at the bottom of the adsorption tower 8 , and a palm mat 14 is fixed above the porous plate 16 in the adsorption tower 8 . The palm mat 14 is not in contact with the bottom end of the intermediate tube 13 .

[0032] Specifically, the space between the palm mat 14 and the sealing plate 17 is filled with a molecular sieve 15 for gas separation.

[0033] Specifically, activated alumina particles for dehydration and drying are filled between the palm mat 14 and the porous plate 16 .

[0034] Specifically, the pre-filtering system 18 includes an air filter 1 for pre-filtering.

[0035] More specifically, the pre-filtration further includes a refrigerated dryer 2 connected to the discharge end of the air filter 1, and the refrigerated dryer 2 is mainly used for drying the airflow.

[0036] More specifically, the pre-filtration also includes a dust tight filter 3 connected to the discharge end of the refrigerated dryer 2, and the dust tight filter 3 is used to filter dust.

[0037] More specifically, the pre-filtration further includes an oil mist tight filter 4 connected to the discharge end of the dust tight filter 3, and the oil mist tight filter 4 is used for removing oil.

[0038] More specifically, the pre-filtration also includes a buffer tank 5 connected to the discharge end of the oil mist tight filter 4, the buffer tank 5 is connected to the pipeline system, and the buffer tank 5 is used for air pressure buffering.

[0039] It can be seen that the entire pre-filtration system 18 uses a multi-stage filtration method to purify the airflow to improve the purification efficiency of the airflow.

[0040] In summary, when the adsorption tower 8 performs adsorption work, the servo motor 10 drives the output shaft of the reduction gear box 9 to rotate, so that the screw rod 11 obtains a larger torsional force. The screw rod 11 drives the molecular sieve 15 into the intermediate cylinder 13 through a spiral transmission form, and then is discharged from the intermediate cylinder 13, so that the molecular sieve 15 circulates in the adsorption tower 8, so that the airflow entering the adsorption tower 8 can be evenly contacted with each molecular sieve 15, and no local saturation phenomenon will occur. The flowing molecular sieve 15 can also start the turbulence effect, thereby increasing the residence time of the airflow in the adsorption tower 8 and improving the adsorption efficiency.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A nitrogen generator, comprising a PSA nitrogen generator, It is characterized in that The PSA nitrogen generator includes a pipeline system and two adsorption towers of the same specifications, a sealing plate is fixed at the top position of the adsorption tower, a rotation hole is opened at the top of the sealing plate and the top of the adsorption tower, and a spiral rod is installed on the two rotation holes through a sealing bearing, an intermediate cylinder is sleeved on the outer side of the spiral rod, and a plurality of connecting rods are arranged between the outer wall of the intermediate cylinder and the inner wall of the adsorption tower to fix the two, a driving assembly is arranged on the top of the adsorption tower, the spiral rod is connected to the driving assembly, and the driving assembly controls the spiral rod to rotate, and also includes; PLC controller, the PLC controller establishes electrical connection with the pipeline system; A pre-filter system for pre-treating air, wherein the pre-filter system is connected to an air inlet end of the pipeline system; Wherein, a muffler is provided at the exhaust gas end of the pipeline system.

2. A nitrogen generator according to claim 1, It is characterized in that The driving assembly includes a reduction gearbox and a servo motor, the servo motor is fixed on the reduction gearbox, the output shaft of the servo motor is coaxially fixed with the input shaft of the reduction gearbox, the reduction gearbox is fixed on the top of the adsorption tower, and the output shaft of the reduction gearbox is coaxially fixed with the screw rod.

3. A nitrogen generator according to claim 1, It is characterized in that A porous plate is fixed at the bottom of the adsorption tower, and a palm mat is fixed at the position above the porous plate in the adsorption tower, and the palm mat does not contact the bottom end of the middle tube.

4. A nitrogen generator according to claim 3, It is characterized in that The space between the palm mat and the sealing plate is filled with molecular sieve.

5. A nitrogen generator according to claim 3, It is characterized in that Activated alumina particles are filled between the palm mat and the porous plate.

6. A nitrogen generator according to claim 1, It is characterized in that The pre-filtration system includes an air filter.

7. A nitrogen generator according to claim 5, It is characterized in that The pre-filtration also includes a refrigerated dryer connected to the discharge end of the air filter.

8. A nitrogen generator according to claim 7, It is characterized in that The pre-filtration also includes a dust tight filter connected to the discharge end of the refrigerated dryer.

9. A nitrogen generator according to claim 8, It is characterized in that The pre-filter also includes an oil mist tight filter connected to the discharge end of the dust tight filter.

10. A nitrogen generator according to claim 2, It is characterized in that The pre-filter also includes a buffer tank communicated with the discharge end of the oil mist tight filter, and the buffer tank is connected to the pipeline system.

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