Adsorbent screening and adding device of nitrogen making device

Abstract

The utility model discloses an adsorbent screening and adding device of a nitrogen making device, which comprises a temporary tower, a carbon molecular sieve is stored in the temporary tower, second two-way pipes are arranged at the top and the bottom of the temporary tower, and first two-way pipes are arranged at the top and the bottom of a separating tower of a nitrogen making machine; a material conveying assembly is arranged on the side edge of the temporary tower and comprises a motor, a shell and a spiral material conveying rod, the spiral material conveying rod is arranged in the shell, the motor is arranged outside the shell and connected with the spiral material conveying rod, and a material storage bin is arranged at the lower end of the shell. The temporary tower is arranged, the temporary tower can be connected to the nitrogen making machine before the carbon molecular sieve is replaced, a separation tower of the carbon molecular sieve to be replaced is isolated, and meanwhile a closed channel is provided for circulation of gas on the nitrogen making machine, that is, the temporary tower is used for replacing the separation tower to complete nitrogen separation; the current situation that the nitrogen making machine needs to be paused for replacement of the carbon molecular sieve for a long time is changed, and loss caused by replacement of the carbon molecular sieve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon molecular sieve replacement, in particular to an adsorbent screening and adding device for a nitrogen production device. Background Technique

[0002] The chemical property of nitrogen is very stable and generally does not react with other substances. This inert quality enables it to be widely used in many anaerobic environments. For example, nitrogen is used to displace the air in a specific container, playing roles such as isolation, flame retardance, explosion prevention, and corrosion prevention.

[0003] In order to produce a large amount of nitrogen for commercial utilization, currently, the pressure swing adsorption method (PSA method) is often used to separate nitrogen from the air. Specifically, compressed air is used as the raw material, and generally, molecular sieve is used as the adsorbent. Under a certain pressure, due to the difference in the adsorption amounts of oxygen and nitrogen molecules on the surfaces of different molecular sieves in the air, oxygen is enriched in the adsorption phase and nitrogen is enriched in the gas phase within a certain time, realizing the separation of oxygen and nitrogen. Currently, mainly carbon molecular sieve is used as the adsorbent, and oxygen in the air is preferentially adsorbed by the carbon molecular sieve, thereby enriching nitrogen in the gas phase. To continuously obtain nitrogen, two adsorption towers need to work alternately.

[0004] There are many devices for producing nitrogen using the above principle. For example, a nitrogen generator disclosed in a Chinese patent with the publication number CN103407976B includes a compressed air pretreatment device and a nitrogen storage tank, as well as a first adsorption tower and a second adsorption tower connected in parallel between the two through an intake pipeline and an outlet pipeline. Two control valves are connected in series on both the intake pipeline and the outlet pipeline. There are also two pipelines between the first adsorption tower and the second adsorption tower. The first pipeline includes a first compensation airbag connected to the first adsorption tower. The air outlet of the first compensation airbag is connected to a first one-way valve, and the air outlet of the first one-way valve is communicated with the second adsorption tower. The second pipeline includes a second compensation airbag connected to the air outlet end of the second adsorption tower. The air outlet of the second compensation airbag is connected to a second one-way valve, and the air outlet of the second one-way valve is communicated with the first adsorption tower.

[0005] Whether it is the above-mentioned nitrogen generator or other nitrogen generators, the carbon molecular sieve used as the adsorbent has a service life. Therefore, after the carbon molecular sieve is used for a long time, it is necessary to disassemble the adsorption tower for replacement. As mentioned above, when replacing the carbon molecular sieve, it is necessary to disassemble the adsorption tower, which means that the entire nitrogen generator needs to stop working. For professional nitrogen producers, the stop of the nitrogen generator will cause losses, that is, less nitrogen is produced and sold. Moreover, the entire time for replacing the carbon molecular sieve is relatively long, which is not conducive to production. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide an adsorbent screening and adding device for a nitrogen production device, aiming to improve the problem that the existing nitrogen generator needs to be shut down for a long time when replacing the carbon molecular sieve.

[0007] The present utility model is realized as follows: An adsorbent screening and adding device for a nitrogen production device includes a standby tower. Carbon molecular sieves are stored in the standby tower, and second two-way pipes are provided at both the top and bottom of the standby tower. At the same time, first two-way pipes are provided at both the top and bottom of the separation tower of the nitrogen generator. A feeding component is provided on the side of the standby tower. The feeding component includes a motor, a housing, and a spiral feeding rod. The spiral feeding rod is arranged in the housing, the motor is arranged outside the housing and is connected to the spiral feeding rod. A storage bin is provided at the lower end of the housing, a filter screen is provided on the storage bin, and an output port is provided at the upper end of the housing.

[0008] Preferably, the housing includes a main housing and a sub-housing. A notch is provided on the main housing, and the notch is arranged along the length direction of the main housing. The sub-housing is arranged at the notch, and third hoop fasteners are sleeved at both ends. The third hoop fasteners are sleeved on the main housing.

[0009] Preferably, a top support and a bottom support are respectively provided at the upper and lower ends of the feeding component. The top support is sleeved on the top of the standby tower, and the bottom support is sleeved on the top of the standby tower and can control the movement of the standby tower.

[0010] Preferably, the bottom support includes an annular connecting plate and multiple legs that are distributed parallel to each other up and down. The multiple legs are evenly distributed along the circumference direction of the annular connecting plate, and the top is fixedly connected to the annular connecting plate. At the same time, walking wheels are provided at the bottom.

[0011] Preferably, an annular plate is provided on the standby tower, and the annular plate supports the bottom support. A threaded column is threadedly penetrated through the lower annular connecting plate, and a brake disc is provided at the lower end of the threaded column.

[0012] Preferably, a convex plate is provided at the outer bottom of the upper annular connecting plate, and a second sleeved annular plate is sleeved on the middle upper part. The side of the second sleeved annular plate is connected to a second hoop fastener through a plate body, and the second hoop fastener is sleeved on the bottom of the housing.

[0013] Preferably, the top support includes a first sleeved annular plate and a vertical plate. The first sleeved annular plate is sleeved on the top of the standby tower, and multiple auxiliary plates are fixedly arranged on the outside. The auxiliary plates are placed in contact with the standby tower. A connecting plate is also fixedly arranged on the side of the first sleeved annular plate. The lower end of the vertical plate is connected to the connecting plate, and a first hoop fastener is provided at the top. The first hoop fastener is sleeved on the top of the housing.

[0014] Preferably, an adjusting screw is threadedly inserted into the connecting plate. The lower end of the vertical plate is fixedly provided with an insertion plate, and the insertion plate is inserted and connected to the connecting plate. The end of the adjusting screw is connected through a bearing and penetrates through the insertion plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. The utility model is provided with a temporary tower, which can be connected to the nitrogen generator before replacing the carbon molecular sieve, isolate the separation tower where the carbon molecular sieve to be replaced is located, and at the same time provide a closed path for the gas to flow through the nitrogen generator, that is, use the temporary tower to replace the separation tower to complete the separation of nitrogen, change the current situation that the nitrogen generator needs to be paused for a long time to replace the carbon molecular sieve, and reduce the losses caused by replacing the carbon molecular sieve.

[0017] 2. The utility model is provided with a feeding assembly, which conveys the carbon molecular sieve in the storage bin to the top of the separation tower by the rotation of the spiral feeding rod, so as to refill the cleaned separation tower with the carbon molecular sieve, and realize the screening of the carbon molecular sieve under the cooperation of the filter screen and the auxiliary shell to remove impurities in the carbon molecular sieve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0019] Figure 2 is a schematic structural diagram of the separation tower of the utility model;

[0020] Figure 3 is a schematic structural diagram of the temporary tower and the feeding assembly of the utility model;

[0021] Figure 4 is a schematic structural diagram of the feeding assembly and the support of the utility model;

[0022] Figure 5 is a schematic structural diagram of the bottom support of the utility model;

[0023] Figure 6 is a schematic structural diagram of the top support of the utility model;

[0024] Figure 7 is a schematic structural diagram of the feeding assembly of the utility model.

[0025] In the figure: 1. Nitrogen generator; 11. Separation tower; 12. First two-way pipe; 13. First control valve; 2. Temporary tower; 21. Second two-way pipe; 22. Second control valve; 23. Ring plate; 3. Feeding assembly; 31. Motor; 32. Storage bin; 33. Filter screen; 34. Main shell; 35. Third hoop; 36. Auxiliary shell; 4. Top support; 41. First nested ring plate; 42. Sub-plate; 43. Connecting plate; 44. Adjusting screw; 45. Insert plate; 46. Vertical plate; 47. First hoop; 5. Bottom support; 51. Ring connecting plate; 52. Leg; 53. Traveling wheel; 54. Brake disc; 55. Second nested ring plate; 56. Convex plate; 57. Second hoop. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The following will be further described in conjunction with the accompanying drawings and specific embodiments:

[0028] Embodiment 1

[0029] As Figure 1 shown, the existing nitrogen generator mainly includes an air compressor, an air purification system, an adsorption tower, an oxygen buffer tank, a nitrogen storage tank, a control system, etc. Air sequentially passes through the air compressor, the air purification system, and the adsorption tower. The oxygen finally discharged is temporarily stored in the oxygen buffer tank, and the separated nitrogen is stored in the nitrogen storage tank. Nitrogen can be produced by separating air through the above steps. There are two sets of adsorption towers (hereinafter referred to as separation tower 11) arranged in parallel. Each adsorption tower stores carbon molecular sieve. By using the different adsorption capacities of carbon molecular sieve for oxygen and nitrogen, selective adsorption is carried out to achieve the separation of nitrogen and oxygen. The air purification system includes steps such as dust removal, oil removal, and drying to purify the air, and specifically may include a pipeline filter, a refrigerated dryer, a fine filter, an ultra-fine filter, etc. The control system includes a programmable logic controller (PLC) for controlling the opening and closing of pneumatic valves to realize the alternating cycle of the two towers, and monitoring and adjusting the operating state of the nitrogen generator. It also includes a temperature controller, a pressure controller, a flow controller, etc., to ensure the stable operation of the nitrogen generator within the set parameter range. Since the nitrogen generator is prior art, it will not be elaborated here in detail.

[0030] As Figure 1 shown, in order to avoid the need to suspend the operation of the nitrogen generator for a long time when replacing the carbon molecular sieve, which affects the production of nitrogen and reduces the production loss, a carbon molecular sieve adding device adapted to the above nitrogen generator is provided.

[0031] As Figure 2 、 Figure 3 、 Figure 4As shown in the figure, the carbon molecular sieve adding device includes a standby tower 2, a feeding component 3, a top support 4, and a bottom support 5. The structure of the standby tower 2 is the same as that of the separation tower 11. First and second two-way pipes 12 and 21 are respectively arranged at the upper and lower ends of the separation tower 11 and the standby tower 2. First and second control valves 13 and 22 are respectively arranged on the first and second two-way pipes 12 and 21. The control valves can be installed at both ends of the two-way pipe or on the main body of the two-way pipe. In short, they are installed according to actual needs. When replacing the carbon molecular sieve in a certain separation tower 11, connect the standby tower 2 to another separation tower 11 and other equipment of the nitrogen generator, so that the separation tower 11 to be replaced with the carbon molecular sieve is independent of the nitrogen generator, so as to disassemble the separation tower 11 to complete the replacement of the carbon molecular sieve. When connecting the standby tower 2 and the separation tower 11, first pause the operation of the nitrogen generator, and then control the operation of some control valves to provide a smooth passage for nitrogen production. The top support 4 and the bottom support 5 are respectively arranged at the upper and lower ends of the feeding component 3 and respectively sleeved on the upper and lower ends of the standby tower 2. On the premise of realizing the stable connection between the feeding component 3 and the standby tower 2, it provides support for the movement of the device according to needs.

[0032] As Figure 7 shown, in order to replace the carbon molecular sieve, that is, input the carbon molecular sieve into the separation tower 11, the feeding component 3 includes a motor 31, a housing, and a spiral feeding rod. The spiral feeding rod is arranged in the housing. The motor 31 is arranged outside the housing and connected to the spiral feeding rod. A storage bin 32 is arranged at the lower feeding port of the housing, and an output port is arranged at the upper end of the housing. The output port can be connected to the top of the separation tower 11 through a pipeline, so that the carbon molecular sieve in the storage bin 32 is transported to the top of the separation tower 11 under the action of the spiral feeding rod and accumulates in the separation tower 11. Before the operation described in this paragraph, it is necessary to output the original carbon molecular sieve in the separation tower 11 from its bottom. In order to control the operation of the feeding component 3, a controller is arranged on the storage bin 32, and the controller can be set as a PLC.

[0033] As Figure 7 shown, in order to remove impurities in the carbon molecular sieve, a filter screen 33 is arranged on the storage bin 32. The housing includes a main housing 34 and a sub-housing 36. A notch is arranged on the main housing 34, and the notch is arranged along the length direction of the main housing 34. The sub-housing 36 is arranged at the notch, and leakage holes are arranged on the side wall. The aperture of the leakage holes is smaller than the aperture of the filter screen 33. Third hoop 35 is sleeved at both ends of the sub-housing 36, and the third hoop 35 is sleeved on the main housing 34. Under the preliminary filtration of the filter screen 33, impurities with larger sizes in the carbon molecular sieve are screened out. When the carbon molecular sieve moves in the housing, smaller impurities can be output from the sub-housing 36 to realize the screening treatment of the carbon molecular sieve. Since the sub-housing 36 is detachably arranged on the main housing 34, it provides convenience for cleaning the space composed of the main housing 34 and the sub-housing 36 according to needs.

[0034] As Figure 5As shown in the figure, in order to stably support the temporary tower 2 and the feeding assembly 3 through the bottom support 5, the bottom support 5 includes an annular connecting plate 51 and multiple legs 52 that are distributed parallel to each other up and down. The multiple legs 52 are evenly distributed along the circumference direction of the annular connecting plate 51, and the tops are fixedly connected to the annular connecting plate 51. At the same time, traveling wheels 53 are provided at the bottoms. A convex plate 56 is provided at the outer bottom of the upper annular connecting plate 51, and a second sleeve ring plate 55 is sleeved through a bearing connection in the middle and upper part. The side of the second sleeve ring plate 55 is connected to a second hoop 57 through a plate body, and the second hoop 57 is sleeved on the bottom of the housing. An annular plate 23 is provided on the temporary tower 2, and the annular plate 23 is supported on the bottom support 5. Because the traveling wheels 53 are provided, and the temporary tower 2 and the feeding assembly 3 are both installed on the bottom support 5, therefore, the temporary tower 2 and the feeding assembly 3 can be pushed to move under the action of an external force, which provides convenience for replacing the carbon molecular sieves of the two separation towers 11.

[0035] As Figure 5 shown in the figure, in order to stably place the temporary tower 2 on the side of the nitrogen generator 1, threaded columns are provided through the lower annular connecting plate 51 in a threaded manner. A brake disc 54 is provided at the lower end of the threaded column. By rotating the threaded column, the brake disc 54 can be controlled to descend and contact the ground, thereby increasing the resistance to the movement of the carbon molecular sieve adding device.

[0036] As Figure 6 shown in the figure, in addition, the top support 4 includes a first sleeve ring plate 41 and a vertical plate 46. The first sleeve ring plate 41 is sleeved on the top of the temporary tower 2, and multiple auxiliary plates 42 are fixedly provided on the outside. The auxiliary plates 42 are placed in contact with the temporary tower 2. A connecting plate 43 is also fixedly provided on the side of the first sleeve ring plate 41. The lower end of the vertical plate 46 is connected to the connecting plate 43, and a first hoop 47 is provided at the top. The first hoop 47 is sleeved on the top of the housing. The settings of the first sleeve ring plate 41 and the second sleeve ring plate 55 can be rotated relative to the temporary tower 2 according to requirements to adjust the position of the feeding assembly 3 relative to the temporary tower 2, which provides convenience for injecting carbon molecular sieves into the separation tower 11.

[0037] Embodiment 2

[0038] As Figure 6 shown in the figure, in order to be able to adjust the distance between the feeding assembly 3 and the temporary tower 2 according to requirements, an adjusting screw 44 is inserted into the connecting plate 43 in a threaded manner. A plug plate 45 is fixedly provided at the lower end of the vertical plate 46. The plug plate 45 is inserted and connected to the connecting plate 43, and the end of the adjusting screw 44 is connected through a bearing and penetrates through the plug plate 45. By rotating the adjusting screw 44, the plug plate 45 can be controlled to move relative to the connecting plate 43 to adjust the position of the first hoop 47. Similarly, the plate body connecting the second sleeve ring plate 55 and the second hoop 57 is arranged with reference to the connecting plate 43 and the plug plate 45, and thus the position of the second hoop 57 can be adjusted.

[0039] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adsorbent screening and adding device for a nitrogen production device, characterized in that, It includes a temporary-use tower (2) which stores carbon molecular sieve inside, and second two-way pipes (21) are provided at both the top and bottom of the temporary-use tower (2). Meanwhile, first two-way pipes (12) are provided at both the top and bottom of the separation tower (11) of the nitrogen generator (1); a feeding assembly (3) is provided on the side of the temporary-use tower (2). The feeding assembly (3) includes a motor (31), a housing and a spiral feeding rod. The spiral feeding rod is arranged in the housing, the motor (31) is arranged outside the housing and is connected to the spiral feeding rod. A storage bin (32) is provided at the lower end of the housing, a filter screen (33) is provided on the storage bin (32), and an output port is provided at the upper end of the housing.

2. The adsorbent screening and adding device for a nitrogen production device according to claim 1, wherein, The housing includes a main housing (34) and a sub-housing (36). A notch is provided on the main housing (34), and the notch is arranged along the length direction of the main housing (34). The sub-housing (36) is arranged at the notch, and leakage holes are provided on the side wall. The aperture of the leakage holes is smaller than the aperture of the filter screen (33). Third hoops (35) are sleeved at both ends of the sub-housing (36), and the third hoops (35) are sleeved on the main housing (34).

3. The adsorbent screening and adding device for a nitrogen production device according to claim 1, characterized in that, A top support (4) and a bottom support (5) are respectively provided at the upper and lower ends of the feeding assembly (3). The top support (4) is sleeved on the top of the temporary-use tower (2), and the bottom support (5) is sleeved on the top of the temporary-use tower (2) and can control the movement of the temporary-use tower (2).

4. The adsorbent screening and adding device of a nitrogen production device according to claim 3, characterized in that, The bottom support (5) includes annular connecting plates (51) and multiple legs (52) which are distributed in parallel up and down. The multiple legs (52) are evenly distributed along the circumferential direction of the annular connecting plate (51), and the tops are fixedly connected to the annular connecting plate (51). Meanwhile, traveling wheels (53) are provided at the bottoms.

5. The adsorbent screening and adding device for a nitrogen production device according to claim 4, characterized in that, An annular plate (23) is provided on the temporary-use tower (2), and the annular plate (23) is placed on the bottom support (5). Threaded columns are threadedly penetrated through the lower annular connecting plate (51) on the lower side, and a brake disc (54) is provided at the lower ends of the threaded columns.

6. The adsorbent screening and adding device for a nitrogen production device according to claim 5, wherein, A convex plate (56) is provided at the outer bottom of the upper annular connecting plate (51), and a second nested ring plate (55) is sleeved in the middle and upper part. The side of the second nested ring plate (55) is connected to a second hoop (57) through a plate body, and the second hoop (57) is sleeved on the bottom of the housing.

7. An adsorbent screening and adding device for a nitrogen production device according to claim 3, characterized in that The top support (4) includes a first nested ring plate (41) and a vertical plate (46). The first nested ring plate (41) is sleeved on the top of the temporary-use tower (2), and multiple auxiliary plates (42) are fixedly arranged on the outside. The auxiliary plates (42) are placed in contact with the temporary-use tower (2). A connecting plate (43) is also fixedly arranged on the side of the first nested ring plate (41). The lower end of the vertical plate (46) is connected to the connecting plate (43), and a first hoop (47) is provided at the top. The first hoop (47) is sleeved on the top of the housing.

8. The adsorbent screening and adding device for a nitrogen production device according to claim 7, characterized in that, The adjusting screw rod (44) is threadedly inserted on the connecting plate (43). The lower end of the vertical plate (46) is fixedly provided with an insertion plate (45). The insertion plate (45) is inserted and connected with the connecting plate (43), and the end of the adjusting screw rod (44) is connected through a bearing and penetrates through the insertion plate (45).

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