CN210635725U - Preparation facilities of high-purity oxygen - Google Patents
Preparation facilities of high-purity oxygen Download PDFInfo
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- CN210635725U CN210635725U CN201920713889.6U CN201920713889U CN210635725U CN 210635725 U CN210635725 U CN 210635725U CN 201920713889 U CN201920713889 U CN 201920713889U CN 210635725 U CN210635725 U CN 210635725U
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Abstract
The utility model discloses a preparation facilities of high pure oxygen has solved the technical problem who prepares high pure oxygen on boats and ships. Comprises a pressure swing adsorption oxygen generation device and a carbon-based molecular sieve oxygen generation device which are arranged on a ship, wherein the microporous structure of a molecular sieve in a carbon-based molecular sieve adsorption tank (12) in the carbon-based molecular sieve oxygen generation device is 2.8A-2.9A; the preparation gas inlet pipe (11) is provided with a second air compression pump (16), the prepared oxygen outlet pipe (10) with 93 percent of oxygen content is communicated with the preparation gas inlet pipe through the second air compression pump, the preparation gas inlet pipe is communicated with the carbon-based molecular sieve adsorption tank (12) through an air inlet valve, the carbon-based molecular sieve adsorption tank is also respectively provided with an argon gas discharge pipe (13) and a high-purity oxygen desorption outlet pipe (14), and the high-purity oxygen desorption outlet pipe is connected with the high-purity oxygen storage tank (15) through a desorption outlet valve. The purpose of directly preparing 99.5 percent of oxygen from air is achieved.
Description
Technical Field
The invention relates to an oxygen preparation device, in particular to a preparation device and a preparation method of high-purity oxygen.
Background
For a long time, oxygen for ships to navigate in the ocean mainly depends on oxygen bottles carried on the ship body, the oxygen bottles need to be supplied at ports, and the oxygen in the oxygen bottles is generally prepared by a cryogenic air separation method at a shore base. The existing cryogenic air separation method for preparing high-purity oxygen has the defects that the occupied area of equipment is large, the arrangement on a ship is difficult to realize, and the ocean voyage time of the ship is limited due to the limitation of the ship site and the limited number of high-purity oxygen cylinders carried by the ship. Along with the development of large-tonnage novel ocean-going ships, the demand of high-purity oxygen in ship navigation is increasing, and the problem that the high-purity oxygen needs to be prepared on the ship on site is solved urgently at present by using less space. The pressure swing adsorption method is a method for preparing oxygen by a pressure adsorption and pressure reduction desorption method in a closed adsorption tower container, wherein air is compressed to 0.8MPa by a compressor, purified compressed air enters an oxygen preparation adsorption tower, oxygen molecules are adsorbed on a molecular sieve in the oxygen preparation adsorption tower, the molecular sieve is saturated by adsorption for 60 to 70 seconds, an air inlet valve is closed, an exhaust valve is opened, nitrogen which is not adsorbed is discharged, then the oxygen molecular sieve is subjected to pressure reduction desorption and desorption, and oxygen is desorbedThe absorption time is 5-10 seconds, and the desorbed oxygen is sent to an oxygen storage tank through an air generating valve; the general closed adsorption tower containers are arranged in pairs, and the automatic control program controls the two adsorption towers to alternately perform adsorption and desorption, thereby achieving the purpose of continuously producing oxygen. The oxygen obtained by pressure swing adsorption contains argon, the molecular sieve used in the method is zeolite molecular sieve, which is a kind of zeolite type crystalline aluminosilicate with microporous cubic lattice, the basic structural unit is tetrahedron formed by four oxygen anions surrounding a smaller silicon or aluminum ion, and the tetrahedron generally contains Li+、Na+、Ca2+The nitrogen and the oxygen are separated by utilizing the difference of the electric quadrupole moments of two gas molecules of nitrogen and oxygen, nitrogen molecules with large electric quadrupole moments are preferentially adsorbed by a molecular sieve under the action of cations, oxygen molecules with small electric quadrupole moments and inert argon molecules have poor adsorption capacity on the surface of zeolite, so that nitrogen is separated from oxygen and argon by a pressure swing adsorption method, and the proportion of oxygen to argon in the separated product gas is as follows: 20.94: 0.93, the maximum concentration of oxygen in the mixed gas after separation was 20.94 ÷ (20.94 + 0.93) × 100% = 95.75%. The carbon-based molecular sieve is a velocity separation type adsorbent with a microporous structure, and realizes gas separation by separating gas molecules with different diameters. In the equipment for preparing nitrogen by using compressed air, because the nitrogen in the compressed air accounts for about 78 percent and the oxygen accounts for about 21 percent, the carbon-based molecular sieves are applied to a large quantity of nitrogen-making devices and are not applied to small quantity of oxygen-making devices, and the ideal cost performance is obtained. If oxygen-argon mixed gas with the oxygen content of 93-95 percent is introduced into the carbon-based molecular sieve, separation of oxygen molecules and argon molecules is carried out, so that the preparation of high-purity oxygen becomes theoretically possible; however, the numerical range of the micropore diameter of the molecular sieve is selected, how to optimize the step sequence and parameters of the separation process and how to economically and efficiently improve the oxygen purity from 93 percent to 99.5 percent becomes a problem to be found and solved on site.
Disclosure of Invention
The invention provides a preparation device and a preparation method of high-purity oxygen, which solve the technical problem of preparing high-purity oxygen on a ship.
The invention solves the technical problems by the following technical scheme:
the general concept of the invention is: an oxygen production device and an oxygen production device of a carbon-based molecular sieve are respectively arranged on a ship, oxygen-argon mixed gas with the oxygen content of 93-95% is firstly produced, and then the produced oxygen-argon mixed gas with the oxygen content of 93-95% is sent into the oxygen production device of the carbon-based molecular sieve, so that oxygen with the oxygen content purity of 99.5% is obtained.
A preparation device of high-purity oxygen comprises a pressure swing adsorption oxygen preparation device and a carbon-based molecular sieve oxygen preparation device which are arranged on a ship, wherein a prepared oxygen output pipe with the oxygen content of 93 percent is arranged in the pressure swing adsorption oxygen preparation device, a prepared gas input pipe and a high-purity oxygen storage tank with the oxygen content of 99 percent are respectively arranged on the carbon-based molecular sieve oxygen preparation device, the microporous structure of a molecular sieve in the carbon-based molecular sieve adsorption tank in the carbon-based molecular sieve oxygen preparation device is 2.8A-2.9A, the symbol A represents angstrom, the angstrom is a commonly used metering unit of molecular diameter and is one order of magnitude smaller than nanometer, and 1 angstrom =0.1 nanometer =10 nanometer-10Rice; the preparation gas input pipe is provided with a second air compression pump, the prepared oxygen output pipe with 93 percent of oxygen content is communicated with the preparation gas input pipe through the second air compression pump, the preparation gas input pipe is communicated with the carbon-based molecular sieve adsorption tank through the gas inlet valve, the carbon-based molecular sieve adsorption tank is also respectively provided with an argon gas discharge pipe and a high-purity oxygen desorption output pipe, and the high-purity oxygen desorption output pipe is connected with the high-purity oxygen storage tank through the desorption output valve.
The device for preparing oxygen by using the pressure swing adsorption method is provided with a first air compression pump, an output port of the first air compression pump is connected with an air buffer tank, the air buffer tank is communicated with an adsorption type dryer sequentially through a first filter and a second filter, an output port of the adsorption type dryer is communicated with an adsorption tower sequentially through a third filter and a fourth filter, an oxygen desorption output port of the adsorption tower is communicated with a prepared oxygen storage tank through a desorption output valve, and the prepared oxygen output pipe with the oxygen content of 93% is arranged on the prepared oxygen storage tank.
A preparation method of high-purity oxygen is characterized by comprising the following steps: the method comprises the steps of respectively arranging a pressure swing adsorption oxygen production device and a carbon-based molecular sieve oxygen production device on a ship, wherein the microporous structure of a molecular sieve in a carbon-based molecular sieve adsorption tank in the carbon-based molecular sieve oxygen production device is 2.8A-2.9A, firstly preparing oxygen-argon mixed gas with the oxygen content of 93-95%, and then sending the prepared 93-95% oxygen-argon mixed gas into the carbon-based molecular sieve oxygen production device to obtain oxygen with the oxygen purity of 99.5%.
The invention relates to a design of a two-stage pressure swing adsorption high-purity oxygen generation device, which skillfully utilizes different characteristics of two molecular sieves, adopts a two-stage pressure swing adsorption mode in an innovative design, and realizes the purpose of directly preparing 99.5 percent of oxygen from air by jointly controlling two parts of pressure swing adsorption devices through a PLC (programmable logic controller).
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a preparation device of high-purity oxygen comprises a pressure swing adsorption oxygen preparation device and a carbon-based molecular sieve oxygen preparation device which are arranged on a ship, wherein a prepared oxygen output pipe 10 with the oxygen content of 93 percent is arranged in the pressure swing adsorption oxygen preparation device, a prepared gas input pipe 11 and a high-purity oxygen storage tank 15 with the oxygen content of 99 percent are respectively arranged on the carbon-based molecular sieve oxygen preparation device, and the microporous structure of a molecular sieve in a carbon-based molecular sieve adsorption molecular sieve tank 12 in the carbon-based molecular sieve oxygen preparation device is 2.8A-2.9A; the preparation gas input pipe 11 is provided with a second air compression pump 16, the prepared oxygen output pipe 10 with 93 percent of oxygen content is communicated with the preparation gas input pipe 11 through the second air compression pump 16, the preparation gas input pipe 11 is communicated with the carbon-based molecular sieve adsorption tank 12 through an air inlet valve, the carbon-based molecular sieve adsorption tank 12 is also respectively provided with an argon gas discharge pipe 13 and a high-purity oxygen desorption output pipe 14, and the high-purity oxygen desorption output pipe 14 is connected with a high-purity oxygen storage tank 15 through a desorption output valve.
A preparation method of high-purity oxygen is characterized by comprising the following steps: the pressure swing adsorption oxygen producing apparatus and the carbon-based molecular sieve oxygen producing apparatus are set separately on shipThe microporous structure of the molecular sieve in the carbon-based molecular sieve adsorption tank 12 in the oxygen production device is 2.8A-2.9A, wherein the symbol A represents angstrom, the angstrom is a common metering unit of molecular diameter and is one order of magnitude smaller than nanometer, and 1 angstrom =0.1 nanometer =10-10Rice; firstly, preparing oxygen-argon mixed gas with the oxygen content of 93-95%, and then sending the prepared 93-95% oxygen-argon mixed gas into a carbon-based molecular sieve oxygen generating device to obtain oxygen with the oxygen content purity of 99.5%.
Claims (2)
1. A preparation device of high-purity oxygen comprises a pressure swing adsorption method oxygen production device and a carbon-based molecular sieve oxygen production device which are arranged on a ship, wherein a prepared oxygen output pipe (10) with the oxygen content of 93 percent is arranged in the pressure swing adsorption method oxygen production device, and a prepared gas input pipe (11) and a high-purity oxygen storage tank (15) with the oxygen content of 99 percent are respectively arranged on the carbon-based molecular sieve oxygen production device, and the preparation device is characterized in that the microporous structure of a molecular sieve in a carbon-based molecular sieve adsorption tank (12) in the carbon-based molecular sieve oxygen production device is 2.8A-2.9A; the preparation gas inlet pipe (11) is provided with a second air compression pump (16), the prepared oxygen outlet pipe (10) with 93 percent of oxygen content is communicated with the preparation gas inlet pipe (11) through the second air compression pump (16), the preparation gas inlet pipe (11) is communicated with the carbon-based molecular sieve adsorption tank (12) through an air inlet valve, the carbon-based molecular sieve adsorption tank (12) is also respectively provided with an argon gas discharge pipe (13) and a high-purity oxygen desorption outlet pipe (14), and the high-purity oxygen desorption outlet pipe (14) is connected with the high-purity oxygen storage tank (15) through a desorption outlet valve.
2. The apparatus for preparing high purity oxygen according to claim 1, wherein a first air compression pump (1) is provided in the pressure swing adsorption oxygen production apparatus, an air buffer tank (2) is connected to an output port of the first air compression pump (1), the air buffer tank (2) is communicated with the adsorption dryer (5) sequentially through a first filter (3) and a second filter (4), an output port of the adsorption dryer (5) is communicated with the adsorption tower (8) sequentially through a third filter (6) and a fourth filter (7), an oxygen desorption output port of the adsorption tower (8) is communicated with the prepared oxygen storage tank (9) through a desorption output valve, and a prepared oxygen output pipe (10) with an oxygen content of 93% is provided on the prepared oxygen storage tank (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920713889.6U CN210635725U (en) | 2019-05-18 | 2019-05-18 | Preparation facilities of high-purity oxygen |
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| CN201920713889.6U CN210635725U (en) | 2019-05-18 | 2019-05-18 | Preparation facilities of high-purity oxygen |
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| CN210635725U true CN210635725U (en) | 2020-05-29 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127618A (en) * | 2019-05-18 | 2019-08-16 | 山西汾西重工有限责任公司 | A kind of preparation facilities of high purity oxygen gas and preparation method thereof |
| CN113023678A (en) * | 2021-04-27 | 2021-06-25 | 湖南万脉医疗科技有限公司 | Oxygen generation device of high-temperature carbonized ceramic-based molecular sieve membrane and use method thereof |
| CN114180529A (en) * | 2021-11-30 | 2022-03-15 | 湖南泰瑞医疗科技有限公司 | Medical oxygen purification device and method |
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2019
- 2019-05-18 CN CN201920713889.6U patent/CN210635725U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110127618A (en) * | 2019-05-18 | 2019-08-16 | 山西汾西重工有限责任公司 | A kind of preparation facilities of high purity oxygen gas and preparation method thereof |
| CN113023678A (en) * | 2021-04-27 | 2021-06-25 | 湖南万脉医疗科技有限公司 | Oxygen generation device of high-temperature carbonized ceramic-based molecular sieve membrane and use method thereof |
| CN114180529A (en) * | 2021-11-30 | 2022-03-15 | 湖南泰瑞医疗科技有限公司 | Medical oxygen purification device and method |
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Effective date of registration: 20220701 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. |