阅读说明：本技术 一种变压吸附制氮工艺及制氮机 (Pressure swing adsorption nitrogen making process and nitrogen making machine ) 是由 吴康春 于 2021-05-25 设计创作，主要内容包括：本申请公开了一种变压吸附制氮工艺及制氮机,属于制氮工艺技术领域,其中一种变压吸附制氮工艺,包括如下步骤：S1、一级过滤,将压缩空气通入布袋除尘器,利用布袋除尘器过滤空气中；S2、预热,将压缩空气加热,加热温度区间为300℃至360℃；S3、二级过滤,将预热过的压缩空气通过活性炭过滤器；S4、分离,将二级过滤后的压缩空气通入制氮机,将压缩空气中的氮气分离。本申请具有保证分子筛的筛分效果,从而提升制得氮气的纯度的效果。(The application discloses pressure swing adsorption nitrogen making technology and nitrogen making machine belongs to nitrogen making technology technical field, and one of them pressure swing adsorption nitrogen making technology includes following steps: s1, primary filtering, namely introducing compressed air into a bag-type dust collector, and filtering the air by using the bag-type dust collector; s2, preheating, namely heating the compressed air, wherein the heating temperature range is 300-360 ℃; s3, secondary filtration, namely passing the preheated compressed air through an activated carbon filter; and S4, separating, namely introducing the compressed air after the secondary filtration into a nitrogen making machine, and separating nitrogen in the compressed air. This application has the screening effect of guaranteeing molecular sieve to promote the effect of the purity of making nitrogen gas.)

1. A pressure swing adsorption nitrogen making process is characterized in that: the method comprises the following steps: s1, primary filtering, namely introducing compressed air into a bag-type dust collector, and filtering the air by using the bag-type dust collector; s2, preheating, namely heating the compressed air, wherein the heating temperature range is 300-360 ℃; s3, secondary filtration, namely passing the preheated compressed air through an activated carbon filter; and S4, separating, namely introducing the compressed air after the secondary filtration into a nitrogen making machine, and separating nitrogen in the compressed air.

2. The utility model provides a pressure swing adsorption nitrogen generator which characterized in that: the device comprises a first separation tank (1) horizontally arranged, a second separation tank (2) horizontally arranged on the lower side of the first separation tank (1), a long connecting box (3) connected between the first separation tank (1) and the second separation tank (2), and a heating box (4) connected to the end parts of the first separation tank (1) and the second separation tank (2) on the same side; an electric heating pipe (42) is fixedly arranged in the heating box (4); the first separation tank (1) and the second separation tank (2) are both connected with an air inlet pipe (11), the air inlet pipe (11) penetrates through the heating box (4), and the first separation tank (1) and the second separation tank (2) are both connected with a nitrogen outlet pipe (12); and the middle parts of the first separation tank (1) and the second separation tank (2) are respectively provided with a molecular sieve component (5).

3. The pressure swing adsorption nitrogen generator of claim 2, wherein: a first pressure gas port (13) and a second pressure gas port (14) are formed in the bottom of the first separation tank (1), the first pressure gas port (13) and the second pressure gas port (14) are respectively arranged on two sides of the molecular sieve assembly (5), and the first pressure gas port (13) is arranged on one side, close to the gas inlet pipe (11), of the molecular sieve assembly (5); a third pressure gas port (21) and a fourth pressure gas port (22) are formed in the top of the second separation tank (2), the third pressure gas port (21) and the fourth pressure gas port (22) are respectively arranged on two sides of the molecular sieve assembly (5), and the third pressure gas port (21) is arranged on one side, close to the gas inlet pipe (11), of the molecular sieve assembly (5); elastic air retaining membranes (6) are fixedly connected in the first air pressing port (13), the second air pressing port (14), the third air pressing port (21) and the fourth air pressing port (22); an adjusting rod (7) is rotatably mounted in the connecting long box (3), a first air pressing block (71) which is used for abutting into the first air pressing port (13) and the third air pressing port (21) is fixed on the adjusting rod (7), a second air pressing block (72) which is used for abutting into the second air pressing port (14) and the fourth air pressing port (22) is also fixed on the adjusting rod (7), and the first air pressing block (71) is positioned on the upper side of the second air pressing block (72) on a vertical plane which is perpendicular to the length direction of the adjusting rod (7); an electric drive assembly (8) for driving the adjusting rod (7) to rotate is arranged outside the heating box (4).

4. The pressure swing adsorption nitrogen generator of claim 3, wherein: the electric drive assembly (8) comprises a drive box (81) fixed on the outer side of the heating box (4), a drive shaft (82) rotatably installed in the drive box (81), a worm wheel (83) fixedly installed on the drive shaft (82), a servo motor (84) fixed on the drive box (81) and a worm (85) fixed on an output shaft of the servo motor (84); the end part of the adjusting rod (7) penetrates through the heating box (4) and penetrates into the driving box (81), and the driving shaft (82) is fixedly connected with the end part of the adjusting rod (7); the worm (85) is meshed with the worm wheel (83).

5. The pressure swing adsorption nitrogen generator of claim 3, wherein: a first balance weight (73) which is opposite to the first air compression block (71) is fixed on the adjusting rod (7), and a second balance weight (74) which is opposite to the second air compression block (72) is fixed on the adjusting rod (7).

6. The pressure swing adsorption nitrogen generator of claim 5, wherein: and avoiding grooves (741) for preventing the elastic air blocking films (6) from being scratched are formed in the first balance block (73) and the second balance block (74).

7. The pressure swing adsorption nitrogen generator of claim 2, wherein: the middle of the air inlet pipe (11) is provided with an S-shaped bent part, and the S-shaped bent part is arranged in the heating box (4).

8. The pressure swing adsorption nitrogen generator of claim 3, wherein: the molecular sieve component (5) comprises a filter box (51) and molecular sieve filling (52) filled in the filter box (51).

Technical Field

The application relates to the technical field of nitrogen making processes, in particular to a pressure swing adsorption nitrogen making process and a nitrogen making machine.

Background

The nitrogen production is a novel nitrogen production technology which takes clean compressed air as a raw material, takes a carbon molecular sieve as an adsorbent and applies the pressure swing adsorption principle to make the carbon molecular sieve filled with micropores selectively adsorb gas molecules to obtain nitrogen. The carbon molecular sieve in the adsorption tower of nitrogen-making machine is made up by using hard coal through the processes of grinding, forming and sintering, and the granules of the activated and formed carbon molecular sieve are distributed with countless microporous holes, and the diameter of every microporous hole is controlled between that of oxygen molecule and that of nitrogen molecule, and the diameter of oxygen molecule is less than that of nitrogen molecule. Gas molecules smaller than the diameter of the hole can enter the hole, and molecules larger than the hole are blocked outside the hole to play a role of sieving molecules.

However, moisture impurities contained in the air affect the sieving effect of the molecular sieve, thereby affecting the purity of the nitrogen gas.

Disclosure of Invention

In order to guarantee the screening effect of molecular sieve to promote the purity of making nitrogen gas, this application provides a pressure swing adsorption nitrogen making technology and nitrogen making machine.

The pressure swing adsorption nitrogen making process and the nitrogen making machine provided by the application adopt the following technical scheme:

a pressure swing adsorption nitrogen making process comprises the following steps: s1, primary filtering, namely introducing compressed air into a bag-type dust collector, and filtering the air by using the bag-type dust collector; s2, preheating, namely heating the compressed air, wherein the heating temperature range is 300-360 ℃; s3, secondary filtration, namely passing the preheated compressed air through an activated carbon filter; and S4, separating, namely introducing the compressed air after the secondary filtration into a nitrogen making machine, and separating nitrogen in the compressed air.

Through the technical scheme, dust and magazines in the compressed air are removed through primary filtration, and in the step S2 and the step S3, moisture in the compressed air is removed and then separated, so that the compressed air is purified, the working stability of the molecular sieve is prevented from being influenced by the moisture and the magazines in the air, the screening effect of the molecular sieve is favorably ensured, and the purity of the prepared nitrogen is improved.

A pressure swing adsorption nitrogen making machine comprises a first separation tank, a second separation tank, a long connecting box and a heating box, wherein the first separation tank is horizontally arranged, the second separation tank is horizontally arranged on the lower side of the first separation tank, the long connecting box is connected between the first separation tank and the second separation tank, and the heating box is connected to the end parts of the first separation tank and the second separation tank on the same side; an electric heating pipe is fixedly arranged in the heating box; the first separation tank and the second separation tank are both connected with air inlet pipes, the air inlet pipes penetrate through the heating box, and the first separation tank and the second separation tank are both connected with nitrogen outlet pipes; and the middle parts of the first separation tank and the second separation tank are respectively provided with a molecular sieve component.

Through the technical scheme, compressed air passes through the intake pipe and gets into in first knockout drum and the second knockout drum, nitrogen gas in the separation effect through the molecular sieve subassembly separates compressed air and discharges through the nitrogen gas outlet duct, then through valve control, make remaining oxygen pass through the intake pipe discharge in the molecular sieve subassembly, and at this in-process, all heated by the heating box before compressed air gets into first knockout drum and second knockout drum, make the molecular sieve subassembly constantly heated in the use, be favorable to evaporating remaining moisture in the molecular sieve subassembly, promote the separation efficiency of molecular sieve subassembly.

Furthermore, a first air compressing port and a second air compressing port are formed at the bottom of the first separation tank, the first air compressing port and the second air compressing port are respectively arranged on two sides of the molecular sieve assembly, and the first air compressing port is arranged on one side, close to the air inlet pipe, of the molecular sieve assembly; a third air pressure port and a fourth air pressure port are formed in the top of the second separation tank, the third air pressure port and the fourth air pressure port are respectively arranged on two sides of the molecular sieve assembly, and the third air pressure port is arranged on one side, close to the air inlet pipe, of the molecular sieve assembly; the first air compressing port, the second air compressing port, the third air compressing port and the fourth air compressing port are fixedly connected with elastic air compressing films; an adjusting rod is rotatably mounted in the connecting long box, a first air pressing block which is used for abutting into the first air pressing port and the third air pressing port is fixed on the adjusting rod, a second air pressing block which is used for abutting into the second air pressing port and the fourth air pressing port is also fixed on the adjusting rod, and the first air pressing block is positioned on the upper side of the second air pressing block on a vertical plane which is perpendicular to the length direction of the adjusting rod; an electric driving assembly for driving the adjusting rod to rotate is arranged outside the heating box.

Through the technical scheme, when compressed air enters the first separation tank, the electric drive assembly drives the adjusting rod to rotate, so that the first air compression block is pressed into the first air compression port, the second air compression block is pressed into the fourth air compression port, at the moment, the air pressure of one side, close to the air inlet pipe, of the molecular sieve assembly in the first separation tank is larger than the air pressure of one side, close to the nitrogen exhaust pipe, in the first separation tank, so that the permeation of the compressed air to the molecular sieve assembly is facilitated, the separation efficiency of the molecular sieve assembly in the first separation tank is improved, the air pressures of two sides of the molecular sieve assembly in the second separation tank are opposite, the removal of residual oxygen in the molecular sieve assembly is facilitated, and the separation efficiency of the oxygen is improved; on the contrary, when letting in compressed air in the second knockout drum, the rotation is adjusted in the drive of electric drive subassembly for the second is pressed the piece and is got into the second and press the gas port, and the third of pressing the gas port is impressed to the first mouth of pressing, thereby is favorable to the separation of nitrogen gas in the second knockout drum and the separation of oxygen in the first knockout drum, so whole system nitrogen oxygen efficiency that has promoted system nitrogen machine.

Further, the electric drive assembly comprises a drive box fixed on the outer side of the heating box, a drive shaft rotatably mounted in the drive box, a worm wheel fixedly mounted on the drive shaft, a servo motor fixed on the drive box and a worm fixed on an output shaft of the servo motor; the end part of the adjusting rod penetrates through the heating box and penetrates into the driving box, and the driving shaft is fixedly connected with the end part of the adjusting rod; the worm is meshed with the worm wheel.

Through above-mentioned technical scheme, when servo motor started, servo motor drive worm rotated, drives the drive shaft through the worm wheel and rotates, has driven the regulation pole and has rotated, and transmission stable in structure.

Furthermore, a first balance weight arranged opposite to the first air compression block is fixed on the adjusting rod, and a second balance weight arranged opposite to the second air compression block is fixed on the adjusting rod.

Through above-mentioned technical scheme, the setting of first balancing piece and second balancing piece for first pressure gas piece all receives subtend balanced effort with the second pressure gas piece when impressing in first knockout drum and the second knockout drum, has promoted the regulating lever and has pressed the transmission efficiency of gas piece to first pressure gas piece and second.

Further, the first balance weight and the second balance weight are provided with avoiding grooves for preventing the elastic air blocking films from being scraped.

Through above-mentioned technical scheme, dodge the setting of groove, be favorable to preventing that first balancing piece and second balancing piece from damaging the elasticity and hold out the breathing membrane.

Furthermore, the middle part of the air inlet pipe is provided with an S-shaped bent part, and the S-shaped bent part is arranged in the heating box.

Through above-mentioned technical scheme, the setting of S-shaped bending portion for compressed air reentries first knockout drum and second knockout drum after can being heated fully.

Further, the molecular sieve component comprises a filter box and a molecular sieve filler filled in the filter box.

Through above-mentioned technical scheme, molecular sieve subassembly simple structure does benefit to the maintenance.

In summary, the present application includes at least one of the following advantageous technical effects:

(1) dust and impurities in the compressed air are removed through primary filtration, and in the steps S2 and S3, moisture in the compressed air is removed and then separated, so that the compressed air is purified, the moisture and the impurities in the air are prevented from influencing the working stability of the molecular sieve, the sieving effect of the molecular sieve is favorably ensured, and the purity of the prepared nitrogen is improved;

(2) compressed air all is heated by the heating box before getting into first knockout drum and second knockout drum for the molecular sieve subassembly is constantly heated in the use, is favorable to evaporating remaining moisture in the molecular sieve subassembly, promotes the separation efficiency of molecular sieve subassembly.

Drawings

FIG. 1 is a schematic step diagram of a pressure swing adsorption nitrogen generation process of the present application;

fig. 2 is a schematic structural view of the pressure swing adsorption nitrogen generator of the present application.

The reference numbers in the figures illustrate:

1. a first separation tank; 11. an air inlet pipe; 12. a nitrogen outlet pipe; 13. a first pressure gas port; 14. a second pressure gas port; 2. a second separation tank; 21. a third pressure port; 22. a fourth pressure port; 3. connecting the long boxes; 4. a heating cartridge; 41. a heat-insulating layer; 42. an electric heating tube; 5. a molecular sieve component; 51. a filter cartridge; 52. a molecular sieve filler; 6. an elastic breath-holding membrane; 7. adjusting a rod; 71. a first air compression block; 72. a second air compression block; 73. a first weight; 74. a second weight; 741. an avoidance groove; 8. an electric drive assembly; 81. a drive cartridge; 82. a drive shaft; 83. a worm gear; 84. a servo motor; 85. a worm.

Detailed Description

The technical solution 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; it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by those of ordinary skill in the art without any inventive work based on the embodiments in the present application belong to the protection scope of the present application.

In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

The present application is described in further detail below with reference to the attached drawings.

The embodiment of the present application discloses a pressure swing adsorption nitrogen production process, please refer to fig. 1, which includes the following steps: s1, primary filtering, namely introducing compressed air into a bag-type dust collector, and filtering dust impurities in the air by using the bag-type dust collector. S2, preheating, namely heating the compressed air, wherein the heating temperature range is 300-360 ℃. And S3, secondary filtration, namely passing the preheated compressed air through an activated carbon filter to absorb moisture in the compressed air. And S4, separating, namely introducing the compressed air after the secondary filtration into a nitrogen making machine, and separating nitrogen in the compressed air.

The implementation principle of the pressure swing adsorption nitrogen making process and the nitrogen making machine in the embodiment of the application is as follows: through the primary filtration, the dust and the magazines in the compressed air are removed, and in the step S2 and the step S3, the moisture in the compressed air is removed and then separated, so that the compressed air is purified, the moisture and the magazines in the air are prevented from influencing the working stability of the molecular sieve, the sieving effect of the molecular sieve is favorably ensured, and the purity of the prepared nitrogen is improved.

The embodiment of the application also discloses a pressure swing adsorption nitrogen generator, please refer to fig. 2, including first knockout drum 1 that the level set up, the second knockout drum 2 that the level set up in first knockout drum 1 downside, connect the long box 3 of connection between first knockout drum 1 and second knockout drum 2, connect in first knockout drum 1 and second knockout drum 2 on the heating box 4 on the homonymy tip. The first separation tank 1 and the second separation tank 2 have the same structure and are both tank structures with round cross sections. The heating box 4 is externally coated with a heat insulation layer 41, an electric heating pipe 42 is fixedly mounted in the heating box 4, and a wiring terminal of the electric heating pipe 42 is arranged on the outer side wall of the heating box 4 far away from the first separating tank 1 in a penetrating manner, so that the electric heating pipe 42 is conveniently electrified.

Referring to fig. 2, the first separation tank 1 and the second separation tank 2 are connected with an air inlet pipe 11 for entering compressed air and discharging oxygen, the air inlet pipe 11 is arranged on the heating box 4 in a penetrating manner, an S-shaped bent portion is arranged in the middle of the air inlet pipe 11, and the S-shaped bent portion is arranged in the heating box 4, so that the retention time of the compressed air in the heating box 4 is prolonged. The first separating tank 1 and the second separating tank 2 are both connected with a nitrogen outlet pipe 12. The middle parts of the first separation tank 1 and the second separation tank 2 are respectively provided with a molecular sieve component 5. The molecular sieve assembly 5 comprises a filter box 51 and a molecular sieve filler 52 filled in the filter box 51, wherein the molecular sieve filler 52 is zeolite, and the filter box 51 is a hollow structure inside a cylinder and is fixedly installed in the first separation tank 1 and the second separation tank 2 and not in the middle of the first separation tank 1 and the second separation tank 2. In addition, the circular end faces of the two ends of the filter box 51 are uniformly provided with a plurality of filter holes for passing gas.

Referring to fig. 2, a first pressure gas port 13 and a second pressure gas port 14 are formed at the bottom of the first separation tank 1, the first pressure gas port 13 and the second pressure gas port 14 are respectively disposed at two sides of the molecular sieve assembly 5, and the first pressure gas port 13 is disposed at one side of the molecular sieve assembly 5 close to the gas inlet pipe 11. The top of the second separation tank 2 is provided with a third pressure gas port 21 and a fourth pressure gas port 22, the third pressure gas port 21 and the fourth pressure gas port 22 are respectively arranged on two sides of the molecular sieve assembly 5, and the third pressure gas port 21 is arranged on one side of the molecular sieve assembly 5 close to the gas inlet pipe 11. The first pressure air port 13, the second pressure air port 14, the third pressure air port 21 and the fourth pressure air port 22 are all fixedly connected with an elastic air-holding film 6, and the elastic air-holding film 6 is made of elastic rubber.

Referring to fig. 2, an adjusting rod 7 is rotatably mounted in the connecting long box 3, the adjusting rod 7 is arranged in parallel with the first separation tank 1, a first air pressing block 71 used for abutting into the first air pressing port 13 and the third air pressing port 21 is fixed on the adjusting rod 7, a second air pressing block 72 used for abutting into the second air pressing port 14 and the fourth air pressing port 22 is also fixed on the adjusting rod 7, and the first air pressing block 71 is located on the upper side of the second air pressing block 72 on a vertical plane perpendicular to the length direction of the adjusting rod 7. Besides, an electric driving assembly 8 for driving the adjusting rod 7 to rotate is arranged outside the heating box 4. When compressed air enters the first separation tank 1, the electric drive component 8 drives the adjusting rod 7 to rotate, so that the first air pressing block 71 is pressed into the first air pressing port 13, the second air pressing block 72 is pressed into the fourth air pressing port 22, at the moment, the air pressure of one side, close to the air inlet pipe 11, of the molecular sieve component 5 in the first separation tank 1 is greater than the air pressure of one side, close to the nitrogen exhaust pipe, in the first separation tank 1, the permeation of the compressed air on the molecular sieve component 5 is facilitated, the separation efficiency of the molecular sieve component 5 in the first separation tank 1 is improved, the air pressures of two sides of the molecular sieve component 5 in the second separation tank 2 are opposite, the removal of residual oxygen in the molecular sieve component 5 is facilitated, and the separation efficiency of the oxygen is improved. On the contrary, when letting in compressed air in the second knockout drum 2, the drive of electric drive subassembly 8 is adjusted pole 7 and is rotated for second pressure gas piece 72 gets into second pressure gas mouth 14, and first pressure gas mouth 13 impresses third pressure gas mouth 21, thereby is favorable to the separation of the interior nitrogen gas of second knockout drum 2 and the separation of oxygen in the first knockout drum 1, so whole system nitrogen oxygen efficiency that has promoted system nitrogen machine.

Further, a first weight 73 is fixed to the adjustment lever 7 so as to face the first air presser 71, and a second weight 74 is fixed to the adjustment lever 7 so as to face the second air presser 72. The arrangement of the first balance weight 73 and the second balance weight 74 enables the first pressure air mass 71 and the second pressure air mass 72 to be subjected to opposite balance acting forces when being pressed into the first separation tank 1 and the second separation tank 2, and improves the transmission efficiency of the adjusting rod 7 on the first pressure air mass 71 and the second pressure air mass 72. The first weight 73 and the second weight 74 are respectively provided with an avoiding groove 741 for preventing the elastic air blocking film 6 from being scratched, which is beneficial to preventing the elastic air blocking film 6 from being damaged by the first weight 73 and the second weight 74.

Referring to fig. 2, the electric driving assembly 8 includes a driving box 81 fixed to an outer side of the heating box 4, a driving shaft 82 rotatably installed in the driving box 81, a worm wheel 83 fixedly installed on the driving shaft 82, a servo motor 84 fixed to an outer side wall of the driving box 81, and a worm 85 fixed to an output shaft of the servo motor 84, an end portion of the adjusting rod 7 penetrates through the heating box 4 and penetrates into the driving box 81, the driving shaft 82 is fixedly connected to an end portion of the adjusting rod 7, and the worm 85 is engaged with the worm wheel 83. When the servo motor 84 is started, the servo motor 84 drives the worm 85 to rotate, the worm wheel 83 drives the driving shaft 82 to rotate, the adjusting rod 7 is driven to rotate, and the transmission structure is stable.

The implementation principle of the pressure swing adsorption nitrogen making machine in the embodiment of the application is as follows: compressed air passes through intake pipe 11 and gets into in first knockout drum 1 and the second knockout drum 2, nitrogen gas in the separation goes out compressed air through molecular sieve subassembly 5 and discharges through nitrogen outlet pipe 12, then through valve control, make remaining oxygen pass through intake pipe 11 in the molecular sieve subassembly 5 and discharge, and at this in-process, all heated by heating box 4 before compressed air gets into first knockout drum 1 and the 2 second knockout drums, make molecular sieve subassembly 5 constantly heated in the use, be favorable to evaporating remaining moisture in the molecular sieve subassembly 5, promote molecular sieve subassembly 5's separation efficiency.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.