CN211159175U - Adsorption tower for producing nitrogen with more than 500 cubic meters - Google Patents
Adsorption tower for producing nitrogen with more than 500 cubic meters Download PDFInfo
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Abstract
The utility model discloses a system nitrogen adsorption tower more than 500 cubic meters, the problem that makes the adsorbent regenerate well when not destroying interior colored structure of tower and exhausting when can not satisfy the voltage-sharing simultaneously that the structure of having solved traditional axial system nitrogen adsorption tower exists. The method for changing the compressed air inlet of the traditional adsorption tower to be used as the exhaust port is changed, the compressed air inlet is separated from the exhaust port, the caliber of the exhaust port is increased, the method for keeping the compressed air inlet to be used as the air inlet and outlet of the pressure equalizing pipeline is kept, the size of the exhaust port is determined according to the empirical value for well regenerating the adsorbent during exhaust, and the caliber of the compressed air inlet is determined on the premise of ensuring that a pattern plate supporting structure in the tower is not damaged by pressure equalizing air flow. The adsorbent has better analysis effect and more ideal nitrogen making index of equipment.
Description
Technical Field
The invention relates to nitrogen production equipment, in particular to a nitrogen production axial adsorption tower with gas production rate of more than 500 cubic meters per hour and a method for determining the caliber of a gas inlet and the caliber of a gas outlet of the nitrogen production axial adsorption tower.
Background
The pressure swing adsorption nitrogen production is generally carried out in a pair of axial adsorption towers, separation material adsorbents are filled in the axial adsorption towers, purified compressed air enters the adsorption towers, oxygen in the compressed air is adsorbed by the adsorbents, and separated nitrogen is discharged from a gas generation port at the top of the adsorption towers; the nitrogen-making adsorption towers are generally arranged in pairs, and the two adsorption towers alternately and cooperatively work to improve the nitrogen-making amount; the concrete structure is as follows (see attached figure 3): the top end of each adsorption tower is provided with a nitrogen output port, the nitrogen output port is connected with a nitrogen output pipe, and the two nitrogen output pipes are connected in parallel and then communicated with a main pipe for collecting nitrogen; the bottom end of each adsorption tower is provided with a compressed air inlet, the compressed air inlet is connected with a compressed air inlet pipe, and the two compressed air inlet pipes are connected in parallel and then communicated with a compressed air inlet main pipe; an exhaust and emptying pipeline is connected in parallel between the two compressed air inlets, and an exhaust port is arranged on the exhaust and emptying pipeline; the operation of the adsorption tower is as follows: three steps of adsorption, pressure equalizing and exhaust are carried out, and the specific working process is as follows: firstly, compressed air is sent into an adsorption tower A, and an adsorbent in the adsorption tower A starts to continuously adsorb oxygen and produce nitrogen; when oxygen adsorbed by the adsorbent in the adsorption tower A is saturated, entering a pressure equalizing operation step, closing an air inlet valve and an air production valve of the adsorption tower A, opening a pressure equalizing valve on a two-tower communication pipeline, outputting compressed air in the adsorption tower A through a compressed air inlet on the adsorption tower A, and enabling the compressed air in the adsorption tower A to enter the adsorption tower B after passing through the two-tower communication pipeline and the compressed air inlet of the adsorption tower B, so that the air pressure in the adsorption tower B is rapidly increased, and the purpose of equalizing the pressure of the two adsorption towers is achieved; after pressure equalization, the method enters an exhaust operation step, a pressure equalizing valve on a pipeline communicated with the two towers is closed, an exhaust valve on the adsorption tower A is opened, the adsorption tower A is emptied, the pressure in the adsorption tower A is instantaneously released, saturated oxygen adsorbed on an adsorbent of the adsorption tower A is released from an air inlet of the adsorption tower A, the adsorbent is regenerated, an air inlet valve on the adsorption tower B is opened simultaneously, the adsorption tower B enters an adsorption working procedure, after the adsorbent in the adsorption tower B is saturated, the pressure equalization and exhaust steps are sequentially entered, the two towers sequentially and circularly work, and nitrogen is prepared.
The traditional axial adsorption tower is only provided with an air generating port and an air inlet, so the axial adsorption tower with the structure is also called a two-port axial adsorption tower, the air inlet of the existing axial adsorption tower is simultaneously a pressure equalizing air inlet and outlet and also an air outlet of saturated oxygen, the axial adsorption tower has three purposes, when the air yield of the axial adsorption tower is below 500 cubic meters per hour, the three-purpose air inlet of one port basically can discharge saturated oxygen in the tower within 4 seconds, and has the function of not impacting a molecular sieve in the tower in the pressure equalizing process of the two towers, but when the air yield of the axial adsorption tower is above 500 cubic meters per hour, because the capacity of the adsorption tower is greatly increased, the adsorption agent in the tower is very large, the saturated oxygen adsorbed in the adsorbent is discharged in the process requirement time in an exhaust link, so that the adsorbent is well regenerated, the air outlet needs to be enlarged, increase the compressed air inlet promptly, because one mouthful of three uses, the compressed air inlet that should increase, in the pressure-equalizing procedure, still undertake the task that will store the high-pressure gas in the compressed air tower body to another ordinary pressure tower body transport compressed air, this compressed air can enter into the buffer zone in the ordinary pressure tower body, and strike the support card of placing the adsorbent, the structural strength who supports the card is limited, if the intensity of the pressure-equalizing gas who enters in the pressure-equalizing too big can blow it apart, make the adsorbent of its top reveal, consequently, the compressed air inlet that is the pressure-equalizing gas outlet simultaneously does not allow too big, consequently, the structure of one mouthful of three-purpose traditional axial nitrogen-making adsorption tower can't satisfy the job requirement of big gas yield yet.
Disclosure of Invention
The invention provides an axial adsorption tower for nitrogen production with the diameter of more than 500 cubic meters and a method for determining the caliber of an air inlet of the axial adsorption tower, which solve the technical problems that the traditional axial adsorption tower for nitrogen production cannot simultaneously meet the requirements of not damaging a structure of a supporting flower plate in the tower during pressure equalizing and well regenerating an adsorbent during air exhaust.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: the method for changing the compressed air inlet of the traditional adsorption tower to be used as the exhaust port is changed, the compressed air inlet is separated from the exhaust port, the caliber of the exhaust port is increased, the method for keeping the compressed air inlet to be used as the air inlet and outlet of the pressure equalizing pipeline is kept, the size of the exhaust port is determined according to the empirical value for well regenerating the adsorbent during exhaust, and the caliber of the compressed air inlet is determined on the premise of ensuring that a pattern plate supporting structure in the tower is not damaged by pressure equalizing air flow.
An adsorption tower for producing nitrogen with the volume of more than 500 cubic meters comprises a first adsorption tower and a second adsorption tower, wherein a first adsorption tower gas production port is arranged at the top end of the first adsorption tower, a second adsorption tower gas production port is arranged at the top end of the second adsorption tower, and the first adsorption tower gas production port and the second adsorption tower gas production port are communicated with a nitrogen collecting main pipe; a first adsorption tower buffer cavity is arranged at the bottom end of the first adsorption tower, a first adsorption tower supporting flower plate is arranged above the first adsorption tower buffer cavity, a second adsorption tower buffer cavity is arranged at the bottom end of the second adsorption tower, a second adsorption tower supporting flower plate is arranged above the second adsorption tower buffer cavity, a first adsorption tower compressed air inlet and a first adsorption tower exhaust port are respectively arranged on the first adsorption tower buffer cavity, a second adsorption tower compressed air inlet and a second adsorption tower exhaust port are respectively arranged on the second adsorption tower buffer cavity, a first adsorption tower compressed air inlet pipe is connected to the first adsorption tower compressed air inlet, a second adsorption tower compressed air inlet pipe is connected to the second adsorption tower compressed air inlet, the other end of the first adsorption tower compressed air inlet pipe is communicated with the other end of the second adsorption tower compressed air inlet pipe, the device comprises a first adsorption tower compressed air inlet pipe, a second adsorption tower compressed air inlet pipe, a compressed air inlet manifold, a first adsorption tower exhaust pipe, a second adsorption tower exhaust pipe, a first adsorption tower exhaust valve, a second adsorption tower exhaust valve and an exhaust pipe, wherein the first adsorption tower compressed air inlet pipe is arranged on the first adsorption tower compressed air inlet pipe, the compressed air inlet manifold is connected between the first adsorption tower compressed air inlet pipe and the second adsorption tower compressed air inlet valve, the first adsorption tower exhaust pipe is connected with the first adsorption tower exhaust pipe, the second adsorption tower exhaust pipe is connected with the second adsorption tower exhaust pipe, the other end of the first adsorption tower exhaust pipe is communicated with the other end of the second adsorption tower exhaust pipe, the first adsorption tower exhaust pipe is provided with the first adsorption tower exhaust valve, the second adsorption tower exhaust valve is arranged on the second adsorption tower exhaust pipe, and an.
The caliber of the exhaust port of the first adsorption tower is larger than that of the compressed air inlet of the first adsorption tower; the caliber of the air outlet of the second adsorption tower is larger than that of the compressed air inlet of the second adsorption tower.
A method for determining the caliber of an air inlet and an air outlet of an adsorption tower for producing nitrogen with the volume of more than 500 cubic meters is characterized by comprising the following steps:
the method comprises the following steps of firstly, respectively arranging a first adsorption tower compressed air inlet and a first adsorption tower exhaust port on a first adsorption tower buffer cavity, respectively arranging a second adsorption tower compressed air inlet and a second adsorption tower exhaust port on a second adsorption tower buffer cavity, connecting a first adsorption tower compressed air inlet pipe on the first adsorption tower compressed air inlet, connecting a second adsorption tower compressed air inlet pipe on the second adsorption tower compressed air inlet, communicating the other end of the first adsorption tower compressed air inlet pipe with the other end of the second adsorption tower compressed air inlet pipe, arranging a first adsorption tower compressed air inlet valve on the first adsorption tower compressed air inlet pipe, arranging a second adsorption tower compressed air inlet valve on the second adsorption tower compressed air inlet pipe, and connecting a compressed air inlet manifold between the first adsorption tower compressed air inlet valve and the second adsorption tower compressed air inlet valve, a first adsorption tower exhaust pipe is connected to an exhaust port of a first adsorption tower, a second adsorption tower exhaust pipe is connected to an exhaust port of a second adsorption tower, the other end of the first adsorption tower exhaust pipe is communicated with the other end of the second adsorption tower exhaust pipe, a first adsorption tower exhaust valve is arranged on the first adsorption tower exhaust pipe, a second adsorption tower exhaust valve is arranged on the second adsorption tower exhaust pipe, and an exhaust pipe is arranged between the first adsorption tower exhaust valve and the second adsorption tower exhaust valve;
secondly, acquiring the oxygen adsorption amount of the adsorbent in the first adsorption tower when the oxygen adsorption process is saturated and the oxygen content required by the process when the adsorbent is regenerated, acquiring the air pressure of compressed air introduced into the first adsorption tower, if the oxygen adsorption amount of the adsorbent when the oxygen adsorption is saturated is released to the oxygen content required by the process when the adsorbent is regenerated, the time spent on the release of the oxygen adsorption amount of the adsorbent when the oxygen adsorption is saturated is 4 seconds, and calculating the minimum caliber of the exhaust port of the first adsorption tower according to the parameters;
and thirdly, acquiring the maximum strength of the supporting pattern plate of the second adsorption tower, acquiring the air pressure of compressed air introduced into the first adsorption tower, and calculating the maximum caliber of the air inlet when the pressure of the second adsorption tower is equalized according to the parameters, wherein the maximum caliber of the air inlet when the pressure of the second adsorption tower is equalized is the maximum caliber of the compressed air inlet of the second adsorption tower.
The ratio of the minimum caliber of the exhaust port of the first adsorption tower to the maximum caliber of the compressed air inlet of the second adsorption tower is 25: 16.
the invention separates the air inlet and the air outlet on the adsorption tower, the external connecting pipeline is simple, the air exhaust is smooth, the adsorbent analysis effect is better, and the nitrogen making index of the equipment is more ideal.
Drawings
FIG. 1 is a schematic view of the present invention in a front view;
FIG. 2 is a schematic view of the present invention in a rear view;
fig. 3 is a schematic view of a conventional adsorption column.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
an adsorption tower for producing nitrogen with the volume of more than 500 cubic meters comprises a first adsorption tower 1 and a second adsorption tower 2, wherein a first adsorption tower gas production port 3 is formed in the top end of the first adsorption tower 1, a second adsorption tower gas production port 4 is formed in the top end of the second adsorption tower 2, and the first adsorption tower gas production port 3 and the second adsorption tower gas production port 4 are communicated with a nitrogen collecting main pipe 5; a first adsorption tower buffer chamber 7 is arranged at the bottom end of a first adsorption tower 1, a first adsorption tower supporting flower plate 6 is arranged above the first adsorption tower buffer chamber 7, a second adsorption tower buffer chamber 12 is arranged at the bottom end of a second adsorption tower 2, a second adsorption tower supporting flower plate 11 is arranged above the second adsorption tower buffer chamber 12, a first adsorption tower compressed air inlet 8 and a first adsorption tower exhaust port 17 are respectively arranged on the first adsorption tower buffer chamber 7, a second adsorption tower compressed air inlet 13 and a second adsorption tower exhaust port 20 are respectively arranged on the second adsorption tower buffer chamber 12, a first adsorption tower compressed air inlet pipe 9 is connected on the first adsorption tower compressed air inlet 8, a second adsorption tower compressed air inlet pipe 14 is connected on the second adsorption tower compressed air inlet 13, the other end of the first adsorption tower compressed air inlet pipe 9 is communicated with the other end of the second adsorption tower compressed air inlet pipe 14, a first adsorption tower compressed air inlet valve 10 is arranged on the first adsorption tower compressed air inlet pipe 9, a second adsorption tower compressed air inlet valve 15 is arranged on the second adsorption tower compressed air inlet pipe 14, a compressed air inlet manifold 16 is connected between the first adsorption tower compressed air inlet valve 10 and the second adsorption tower compressed air inlet valve 15, a first adsorption tower exhaust pipe 18 is connected to the first adsorption tower exhaust port 17, a second adsorption tower exhaust pipe 21 is connected to the second adsorption tower exhaust port 20, the other end of the first adsorption tower exhaust pipe 18 is communicated with the other end of the second adsorption tower exhaust pipe 21, a first adsorption tower vent valve 19 is provided on the first adsorption tower vent pipe 18, a second adsorption tower vent valve 22 is provided on the second adsorption tower vent pipe 21, a vent pipe 23 is provided between the first adsorption tower vent valve 19 and the second adsorption tower vent valve 22.
The caliber of the first adsorption tower exhaust port 17 is larger than that of the first adsorption tower compressed air inlet 8; the caliber of the second adsorption tower exhaust port 20 is larger than that of the second adsorption tower compressed air inlet 13; the bigger adsorption tower gas vent has ensured that the oxygen on the adsorbent that will adsorb saturation in a short time releases outside the tower more thoroughly, obtains the analytic effect of better oxygen boosting, it is more smooth and easy when carrying out next round of adsorption oxygen to make this adsorption tower, restriction adsorption tower compressed air inlet's bore does not exceed the bore of adsorption tower gas vent, because the structure that the flower plate supported in the pressure-equalizing in-process protection tower body is not damaged by powerful air current, further protect the molecular sieve adsorbent on the flower plate bearing structure not to receive destruction.
A method for determining the caliber of an air inlet and an air outlet of an adsorption tower for producing nitrogen with the volume of more than 500 cubic meters is characterized by comprising the following steps:
the method comprises the following steps of firstly, respectively arranging a first adsorption tower compressed air inlet 8 and a first adsorption tower exhaust port 17 on a first adsorption tower buffer cavity 7, respectively arranging a second adsorption tower compressed air inlet 13 and a second adsorption tower exhaust port 20 on a second adsorption tower buffer cavity 12, connecting a first adsorption tower compressed air inlet pipe 9 on the first adsorption tower compressed air inlet 8, connecting a second adsorption tower compressed air inlet pipe 14 on the second adsorption tower compressed air inlet 13, communicating the other end of the first adsorption tower compressed air inlet pipe 9 with the other end of the second adsorption tower compressed air inlet pipe 14, arranging a first adsorption tower compressed air inlet valve 10 on the first adsorption tower compressed air inlet pipe 9, arranging a second adsorption tower compressed air inlet valve 15 on the second adsorption tower compressed air inlet pipe 14, and connecting a compressed air inlet manifold between the first adsorption tower compressed air inlet valve 10 and the second adsorption tower compressed air inlet valve 15 16, a first adsorption tower exhaust pipe 18 is connected to a first adsorption tower exhaust port 17, a second adsorption tower exhaust pipe 21 is connected to a second adsorption tower exhaust port 20, the other end of the first adsorption tower exhaust pipe 18 is communicated with the other end of the second adsorption tower exhaust pipe 21, a first adsorption tower exhaust valve 19 is arranged on the first adsorption tower exhaust pipe 18, a second adsorption tower exhaust valve 22 is arranged on the second adsorption tower exhaust pipe 21, and an exhaust pipe 23 is arranged between the first adsorption tower exhaust valve 19 and the second adsorption tower exhaust valve 22;
secondly, acquiring the oxygen adsorption amount of the adsorbent in the first adsorption tower 1 when the oxygen adsorption process is saturated and the oxygen content required by the process when the adsorbent is regenerated, acquiring the air pressure of compressed air introduced into the first adsorption tower 1, if the oxygen adsorption amount of the adsorbent when the oxygen adsorption process is saturated is released to the oxygen content required by the process when the adsorbent is regenerated, the time spent is 4 seconds, and calculating the minimum caliber of the exhaust port 17 of the first adsorption tower according to the parameters;
and thirdly, acquiring the maximum strength of the second adsorption tower supporting pattern plate 11, acquiring the air pressure of compressed air introduced into the first adsorption tower 1, and calculating the maximum aperture of the air inlet when the pressure of the second adsorption tower is equalized according to the parameters, wherein the maximum aperture of the air inlet when the pressure of the second adsorption tower is equalized is the maximum aperture of the compressed air inlet 13 of the second adsorption tower.
The first adsorption tower 1 and the second adsorption tower 2 have the same structure and the same capacity, so the calculated minimum caliber of the first adsorption tower exhaust port 17 is also the minimum caliber of the second adsorption tower exhaust port 20, and the maximum caliber of the second adsorption tower compressed air inlet 13 is also the maximum caliber of the first adsorption tower compressed air inlet 8; according to field trial and error, we obtained: for more than 500 cubic meters of nitrogen making adsorption towers, the ideal time for exhausting and analyzing oxygen on the adsorbent is 4 seconds, and according to the test results of several models of nitrogen making equipment, the ratio of the minimum caliber of the exhaust port 17 of the first adsorption tower to the maximum caliber of the compressed air inlet 13 of the second adsorption tower is 25: 16, in order to obtain a ratio at which an ideal nitrogen making index can be obtained.
Claims (2)
1. An adsorption tower for producing nitrogen with the volume of more than 500 cubic meters comprises a first adsorption tower (1) and a second adsorption tower (2), wherein a first adsorption tower gas production port (3) is arranged at the top end of the first adsorption tower (1), a second adsorption tower gas production port (4) is arranged at the top end of the second adsorption tower (2), and the first adsorption tower gas production port (3) and the second adsorption tower gas production port (4) are communicated with a nitrogen collecting main pipe (5); a first adsorption tower buffer cavity (7) is arranged at the bottom end of the first adsorption tower (1), a first adsorption tower supporting flower plate (6) is arranged above the first adsorption tower buffer cavity (7), a second adsorption tower buffer cavity (12) is arranged at the bottom end of the second adsorption tower (2), a second adsorption tower supporting flower plate (11) is arranged above the second adsorption tower buffer cavity (12), the adsorption tower is characterized in that a first adsorption tower compressed air inlet (8) and a first adsorption tower exhaust port (17) are respectively arranged on the first adsorption tower buffer cavity (7), a second adsorption tower compressed air inlet (13) and a second adsorption tower exhaust port (20) are respectively arranged on the second adsorption tower buffer cavity (12), a first adsorption tower compressed air inlet pipe (9) is connected to the first adsorption tower compressed air inlet (8), and a second adsorption tower compressed air inlet pipe (14) is connected to the second adsorption tower compressed air inlet (13), the other end of a first adsorption tower compressed air inlet pipe (9) is communicated with the other end of a second adsorption tower compressed air inlet pipe (14), a first adsorption tower compressed air inlet valve (10) is arranged on the first adsorption tower compressed air inlet pipe (9), a second adsorption tower compressed air inlet valve (15) is arranged on the second adsorption tower compressed air inlet pipe (14), a compressed air inlet main pipe (16) is connected between the first adsorption tower compressed air inlet valve (10) and the second adsorption tower compressed air inlet valve (15), a first adsorption tower exhaust pipe (18) is connected on a first adsorption tower exhaust port (17), a second adsorption tower exhaust pipe (21) is connected on a second adsorption tower exhaust port (20), the other end of the first adsorption tower exhaust pipe (18) is communicated with the other end of the second adsorption tower exhaust pipe (21), a first adsorption tower exhaust valve (19) is arranged on the first adsorption tower exhaust pipe (18), a second adsorption tower exhaust valve (22) is arranged on the second adsorption tower exhaust pipe (21), and a vent pipe (23) is arranged between the first adsorption tower exhaust valve (19) and the second adsorption tower exhaust valve (22).
2. The adsorption tower for producing nitrogen of more than 500 cubic meters according to claim 1, wherein the caliber of the exhaust port (17) of the first adsorption tower is larger than the caliber of the compressed air inlet port (8) of the first adsorption tower; the caliber of the exhaust port (20) of the second adsorption tower is larger than that of the compressed air inlet (13) of the second adsorption tower.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102150A (en) * | 2019-05-18 | 2019-08-09 | 山西汾西重工有限责任公司 | 500 cubic metres or more N2 adsorption towers and its porting bore processed determine method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102150A (en) * | 2019-05-18 | 2019-08-09 | 山西汾西重工有限责任公司 | 500 cubic metres or more N2 adsorption towers and its porting bore processed determine method |
| CN110102150B (en) * | 2019-05-18 | 2023-09-01 | 山西皆利气体科技有限公司 | Nitrogen production adsorption tower with diameter of 500 cubic meters or more and method for determining caliber of air inlet and air outlet of nitrogen production adsorption tower |
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Effective date of registration: 20220706 Address after: 030000 third floor, no.280 malinying West Road, Taiyuan Tanghuai Park, Shanxi comprehensive reform demonstration zone, Taiyuan City, Shanxi Province Patentee after: Shanxi Junli Gas Technology Co.,Ltd. Patentee after: Shanxi Fenxi Heavy Industry Co., Ltd Address before: 030027 No. 131 Heping North Road, Shanxi, Taiyuan Patentee before: SHANXI FENXI HEAVY INDUSTRY Co.,Ltd. Patentee before: Shanxi Fenxi mechanical and Electrical Co., Ltd. |