CN114180529A - Medical oxygen purification device and method - Google Patents
Medical oxygen purification device and method Download PDFInfo
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- CN114180529A CN114180529A CN202111442148.7A CN202111442148A CN114180529A CN 114180529 A CN114180529 A CN 114180529A CN 202111442148 A CN202111442148 A CN 202111442148A CN 114180529 A CN114180529 A CN 114180529A
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- 239000001301 oxygen Substances 0.000 title claims abstract description 149
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 149
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 138
- 238000000746 purification Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001179 sorption measurement Methods 0.000 claims abstract description 252
- 238000003860 storage Methods 0.000 claims abstract description 24
- 238000004458 analytical method Methods 0.000 claims abstract description 19
- 239000002808 molecular sieve Substances 0.000 claims abstract description 15
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 230000001105 regulatory effect Effects 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 15
- 238000003795 desorption Methods 0.000 claims description 9
- 230000003584 silencer Effects 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims 2
- 239000007789 gas Substances 0.000 abstract description 20
- 238000005265 energy consumption Methods 0.000 abstract description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 239000007788 liquid Substances 0.000 description 5
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001868 water Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0062—Water
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0068—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0098—Other impurities
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- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a device and a method for purifying medical oxygen, wherein the device comprises an electric cabinet and a purification system electrically connected with the electric cabinet, the purification system comprises an empty tank, a primary adsorption tower group, a balance tank, a secondary adsorption tower group and an oxygen storage tank which are sequentially connected, the adsorption tower group is also communicated with the secondary adsorption tower group through a first pipeline valve group, a compressor is arranged on the first pipeline valve group, the oxygen storage tank is connected with the compressor, the primary adsorption tower group is communicated with the outside through a second pipeline valve group, the primary adsorption tower group and the secondary adsorption tower group are filled with carbon molecular sieves, and the adsorption towers of the primary adsorption tower group are alternately subjected to pressure rise adsorption and pressure drop analysis; the method comprises the steps of gas inlet, pressure swing purification, sub-oxygen reutilization, secondary adsorption, secondary analysis, pressure equalization and adsorption tower set flow exchange; the invention has small size, low energy consumption, high safety, fast speed and convenient obtaining of medical oxygen with the concentration not less than 99.5 percent, and can start and stop oxygen supply at any time.
Description
Technical Field
The invention relates to the field of medical technology industry, in particular to a device and a method for purifying medical oxygen.
Background
The traditional Pressure Swing Adsorption (PSA) method for purifying oxygen can only produce oxygen-enriched air with the concentration of 93 plus or minus 3 percent because argon and other impurity gases cannot be separated. The standard requirement concentration of medical oxygen reaches 99.5%, so that the oxygen purified by the traditional pressure swing adsorption method cannot meet the medical requirement.
Pressure swing adsorption oxygen generating equipment (also called PSA oxygen generating equipment) selectively adsorbs impurities such as nitrogen, carbon dioxide, water and the like in air by utilizing a PSA special molecular sieve under the conditions of normal temperature and normal pressure, thereby obtaining oxygen with higher purity (93 +/-3%). The traditional molecular sieve oxygen preparation method cannot separate oxygen from argon, so that the concentration of the obtained oxygen has an upper limit which cannot reach more than 99.5%.
At present, medical oxygen with the concentration of 99.5 percent is generally prepared by a cryogenic method. The air separation principle of the cryogenic method is that air is used as a raw material, and the air is liquefied into liquid air through compression, purification and heat exchange. The liquid air is mainly a mixture of liquid oxygen and liquid nitrogen, and the liquid oxygen and the liquid nitrogen are separated by rectification by utilizing the difference of boiling points of the liquid oxygen and the liquid nitrogen to obtain nitrogen and oxygen. But the oxygen production equipment by the cryogenic process is complex, the energy consumption is high, and a great deal of time is needed for restarting the oxygen supply once the oxygen production is stopped. The liquid oxygen is prepared by the cryogenic method, and has larger potential safety hazard in transportation and use.
Disclosure of Invention
The invention aims to provide a device and a method for purifying medical oxygen, which solve the problems that the prior art for purifying oxygen can not meet medical requirements, and the prior art for meeting medical requirements has the disadvantages of complex equipment, high energy consumption, long time consumption for restarting and potential safety hazards.
The invention is realized in such a way that the device comprises an electric cabinet and a purification system electrically connected with the electric cabinet, wherein the purification system comprises an empty tank, a primary adsorption tower group, a balance tank, a secondary adsorption tower group and an oxygen storage tank which are sequentially connected, the adsorption tower group is also communicated with the secondary adsorption tower through a first pipeline valve group, a compressor is arranged on the first pipeline valve group, the oxygen storage tank is connected with the compressor, the adsorption tower group is communicated with the outside through a second pipeline valve group,
the first-stage adsorption tower group and the second-stage adsorption tower group are filled with carbon molecular sieves, and pressure-rising adsorption and pressure-reducing analysis are alternately performed among adsorption towers of the first-stage adsorption tower group.
The invention further improves the following steps: the purification device also comprises a buffer tower arranged between the oxygen storage tank and the secondary adsorption tower group.
The invention further improves the following steps: the outlet of the empty tank is communicated with the first-stage adsorption tower group through an adjusting valve A,
the outlet of the first-stage adsorption tower group is communicated with the second-stage adsorption tower group sequentially through an electric control valve D, a compressor and an electric control valve N, the outlet of the first-stage adsorption tower group is communicated with the second-stage adsorption tower group sequentially through an electric control valve C, the compressor and the electric control valve N,
the inlet of the first-stage adsorption tower group is communicated with the balancing tank sequentially through an electric control valve E, the compressor and an electric control valve K, the inlet of the first-stage adsorption tower group is communicated with the balancing tank sequentially through an electric control valve F, the compressor and an electric control valve K,
the outlet of the first-stage adsorption tower group is connected with a silencer through a pressure regulating valve B,
the outlet of the second-stage adsorption tower group is communicated with the inlet of the balancing tank through an electric control valve R, the outlet of the second-stage adsorption tower group is communicated with the buffer tower through an electric control valve L, the compressor and an electric control valve S in sequence,
the outlet of the buffer tower is communicated with the oxygen storage tank through a filter and a pressure regulating valve C in sequence,
the two ends of the compressor are communicated through an electric control valve M.
The invention further improves the following steps: the first-level adsorption tower group comprises an adsorption tower A and an adsorption tower B, and the adsorption tower A and the adsorption tower B are respectively connected with the empty tank, the second-level adsorption tower group and the balance tank through pipeline valve groups.
The invention further improves the following steps: adsorption tower A with pass through electric control valve G or electric control valve H entry between the adsorption tower B and pass through electric control valve A with governing valve A connects, adsorption tower B entry pass through electric control valve B with governing valve A connects, adsorption tower A export pass through electric control valve I with governing valve B connects, adsorption tower B export pass through electric control valve J with governing valve B connects.
The invention further improves the following steps: and the electric control valve E and the electric control valve F are connected with a pipeline connected with the electric control valve N through an electric control valve P and a silencer.
The invention further improves the following steps: and pressure sensors are arranged on a pipeline connected with the compressor and the electric control valve S, at the inlet of the empty tank, at the outlet of the primary adsorption tower group, at the inlet of the balance tank, at the outlet of the secondary adsorption tower group and at the outlet of the buffer tower.
The invention further improves the following steps: the pipeline between the pressure regulating valve A and the primary adsorption tower set is provided with a needle valve A for measuring oxygen concentration, a needle valve B for measuring oxygen concentration is arranged between the pressure regulating valve and the silencer, a needle valve C for measuring oxygen concentration is arranged between the outlet of the secondary adsorption tower set and the electric control valve R, and a needle valve D for measuring oxygen concentration is arranged between the pressure regulating valve C and the ball valve C.
The invention further improves the following steps: and a filter is arranged at the inlet of the compressor.
The invention further improves the following steps: a ball valve A is arranged between the pressure regulating valve B and the silencer, a ball valve B is arranged between the electric control valve R and the balance tank, and a ball valve C is arranged between the pressure regulating valve C and the oxygen storage tank.
The invention further improves the following steps: and the outlet of the secondary adsorption tower group is communicated with the balance tank through an electric control valve Q.
A method for purifying medical oxygen, comprising the steps of:
step one, based on the purification device;
step two, air inlet: oxygen-containing air is used as an air inlet source and stably enters the adsorption tower group through a pipeline valve group between an empty tank and the adsorption tower group, and the oxygen concentration at the position is measured;
step three, pressure swing purification of the adsorption tower set: at least one group of adsorption towers A in the primary adsorption tower group is subjected to pressure-increasing adsorption, and at least one group of adsorption towers B is subjected to pressure-decreasing analysis;
step four, the oxygen-containing air only enters the adsorption tower group to be subjected to pressure-boosting adsorption; simultaneously, carrying out vacuum-pumping analysis on the adsorption tower to be subjected to pressure reduction analysis, and enabling the analyzed oxygen to enter a secondary adsorption tower group for pressure-boosting adsorption and pressure reduction analysis again; pumping oxygen generated in the secondary adsorption tower group into an oxygen storage tank;
and step five, when the preset time is reached, the adsorption tower A and the adsorption tower B in the adsorption tower group perform adsorption and desorption process exchange, so that the adsorption tower A performs depressurization and desorption and the adsorption tower B performs pressure-rise adsorption, and the step four is executed, and the steps are circulated in sequence.
The invention further improves the following steps: and (3) reutilization of the sub-oxygen: and (4) allowing the sub-oxygen stored in the balance tank to enter an adsorption tower to be subjected to pressure boosting adsorption for re-purification.
Before the fifth step, the pressure equalization of the adsorption tower set can be carried out first, and then the exchange of the technological process can be carried out, wherein the pressure equalization specifically comprises the following steps: other valves are closed, a pipeline valve group between adsorption towers of the adsorption tower group is opened, pressure equalization is carried out between the adsorption towers, meanwhile, an electric control valve forming loop connection at two ends of a compressor is opened, and the compressor is started in a self-circulation process; pressure equalization is carried out firstly, and then the exchange of the process flows of the adsorption tower A and the adsorption tower B is carried out, so that the energy consumption can be effectively reduced, and the energy is saved.
The purification principle of the device is as follows: the device is designed according to the idea that oxygen-enriched air is purified by using a molecular sieve to obtain oxygen with the concentration of more than or equal to 99.5% (the highest concentration can reach 99.8%), the preparation principle is based on the fact that the diffusion rates of the oxygen and other gases in the molecular sieve are different, the diffusion rate of the oxygen on the surface of the carbon molecular sieve is higher than that of the other gases under a certain pressure, and the molecular sieve preferentially adsorbs oxygen, so that most of the oxygen is enriched in the molecular sieve. The molecular sieve itself has a characteristic that the adsorption capacity for oxygen increases when pressurized and the adsorption amount for oxygen decreases when depressurized. By utilizing the characteristics, a set of device with the pressure-changing characteristic and a special pipeline valve bank are designed for purification, so that oxygen with the concentration of more than or equal to 99.5 percent is obtained.
The invention has the beneficial effects that: the method adopts a pressure swing adsorption method to purify the air with the oxygen concentration of more than 80 percent to obtain the medical oxygen with the concentration of more than or equal to 99.5 percent, has small and exquisite equipment, low energy consumption and high safety, can start and stop oxygen supply at any time, has higher speed and is more convenient to obtain the medical oxygen with the concentration of not less than 99.5 percent; wherein, the adsorption tower is used for adsorbing oxygen by adopting a carbon molecular sieve, other gases are discharged, and medical oxygen with the concentration of more than or equal to 99.5 percent is obtained after analysis; the method comprises the following steps of carrying out secondary purification, and improving the recovery rate of oxygen; the adsorption and the desorption between the adsorption tower A and the group B are alternately carried out, so that the oxygen purification efficiency is improved; the principle and the structure of the device and the corresponding valve group system control program enable the whole device to have superior performance, simultaneously enable the oxygen purification speed to be high, and continuously operate, and compared with the traditional deep cooling method for preparing medical oxygen, the device is more convenient and energy-saving.
Drawings
FIG. 1 is a top view of a medical oxygen purifier according to the present invention;
fig. 2 is a schematic structural diagram of a purification system provided by the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
A purification device for medical oxygen comprises an electric cabinet 0 and a purification system electrically connected with the electric cabinet 0, wherein the purification system comprises an empty tank 1, a primary adsorption tower group 2, a balance tank 3, a secondary adsorption tower group 5, a buffer tower 6 and an oxygen storage tank 10 which are sequentially connected through a pipeline valve group, the primary adsorption tower group 2 is further connected with the secondary adsorption tower group 5 through the pipeline valve group, the buffer tower 6, the primary adsorption tower group 2 and the pipeline valve group connected with the secondary adsorption tower group 5 are provided with a compressor 4, the pipeline valve group connected with the balance tank 3 and the primary adsorption tower group 2 is connected through the compressor 4, the primary adsorption tower group 2 is communicated with the outside through the pipeline valve group,
the adsorption towers of the first-level adsorption tower group 2 are communicated through a pipeline valve group, the first-level adsorption tower group 2 and the second-level adsorption tower group 5 are filled with carbon molecular sieves, and the adsorption towers of the first-level adsorption tower group 2 are alternately and continuously subjected to pressure-raising adsorption and pressure-lowering analysis.
The outlet of the empty tank 1 is communicated with the primary adsorption tower group 2 through a regulating valve A31,
the outlet of the first-stage adsorption tower group 2 is communicated with the second-stage adsorption tower group 5 sequentially through an electric control valve D14, a compressor 4 and an electric control valve N114, the outlet of the first-stage adsorption tower group 2 is communicated with the second-stage adsorption tower group 5 sequentially through an electric control valve C13, the compressor 4 and the electric control valve N114,
the inlet of the first-stage adsorption tower group 2 is communicated with the balance tank 3 through an electric control valve E15, the compressor 4 and an electric control valve K111 in sequence, the inlet of the first-stage adsorption tower group 2 is communicated with the balance tank 3 through an electric control valve F16, the compressor 4 and an electric control valve K111 in sequence,
the outlet of the first-stage adsorption tower group 2 is connected with a silencer through a pressure regulating valve B32,
the outlet of the secondary adsorption tower group 5 is communicated with the inlet of the balance tank 3 through an electric control valve R118, the outlet of the secondary adsorption tower group 5 is communicated with the buffer tower 6 through an electric control valve L112, the compressor 4 and an electric control valve S15 in sequence,
the outlet of the buffer tower 6 is communicated with an oxygen storage tank 10 through a filter 8 and a pressure regulating valve C33 in turn,
the two ends of the compressor 4 are communicated through an electric control valve M113.
The first-stage adsorption tower group 2 comprises an adsorption tower A21 and an adsorption tower B22, wherein the adsorption tower A21 and the adsorption tower B22 are respectively connected with the empty tank 1, the second-stage adsorption tower group 5 and the balance tank 3 through pipeline valve groups.
The adsorption tower A21 is communicated with the adsorption tower B22 through an electric control valve G17 or an electric control valve H18), the inlet of the adsorption tower A21 is connected with the regulating valve A31 through an electric control valve A11, the inlet of the adsorption tower B22 is connected with the regulating valve A31 through an electric control valve B12, the outlet of the adsorption tower A21 is connected with the regulating valve B32 through an electric control valve I19, and the outlet of the adsorption tower B22 is connected with the regulating valve B32 through an electric control valve J110.
The electric control valve E15 and the electric control valve F16 are connected with the pipe connected with the electric control valve N114 through an electric control valve P116 and are connected with a silencer.
And pressure sensors 9 are arranged on a pipeline connected with the compressor 4 and the electric control valve S115, on the inlet of the empty tank 1, on the outlet of the primary adsorption tower group 2, on the inlet of the balance tank 3, on the outlet of the secondary adsorption tower group 5 and on the outlet of the buffer tower 6.
The pressure regulating valve A31 with be equipped with the needle valve A41 that is used for surveying oxygen concentration on the pipeline between the first order adsorption tower group 2, be equipped with the needle valve B42 that is used for surveying oxygen concentration between pressure regulating valve 32 and the silence ware, the export of second order adsorption tower group 5 with be equipped with the needle valve C43 that is used for surveying oxygen concentration between the automatically controlled valve R118, pressure regulating valve C33 with be equipped with the needle valve D44 that is used for surveying oxygen concentration between the ball valve C103.
A filter 8 is arranged at the inlet of the compressor 4.
A ball valve A121 is arranged between the pressure regulating valve B32 and the silencer, a ball valve B122 is arranged between the electric control valve R118 and the balance tank 3, and a ball valve C123 is arranged between the pressure regulating valve C33 and the oxygen storage tank 10.
The outlet of the secondary adsorption tower group 5 is communicated with the balance tank 3 through an electric control valve Q117.
The device using method comprises the following steps:
after the device is opened, oxygen-containing air with the concentration more than 80 percent provided by the front-end oxygen generating host enters the empty tank 1, medical pure oxygen with the concentration more than or equal to 99.5 percent and meeting the standard can be continuously generated from the oxygen outlet of the buffer tower 6 after being purified by the purification system, and the oxygen-containing air can be stored in the oxygen storage tank 10 for use.
The first embodiment is as follows:
the embodiment provides a purification device of medical oxygen as shown in fig. 1-2, the device air inlet air supply is the oxygen-enriched air, the gas of gas outlet is medical oxygen, mainly comprise electric cabinet and purification system, the electric cabinet can control the operating condition of purification system, including opening, shutting down, scram, and purification process etc., the purification system includes the base, adsorption tower A, adsorption tower B, second grade adsorption tower, the compensating tank, the pure oxygen buffer tower, the oxygen compressor, and special valves pipeline, the inside major structure of purification system is as shown in the following fig. 1:
the names and main functions of the components in the invention are as follows:
an empty tank 1: the oxygen-enriched storage tank temporarily stores oxygen-enriched air, namely an air source, so that the air entering the adsorption tower keeps a stable air pressure.
The first-stage adsorption tower group 2: comprises an adsorption tower A and an adsorption tower B, which adsorb and resolve oxygen and alternately and circularly work to complete the purification of the oxygen.
The compressor 4: the compressor is an oxygen compressor and provides power for the adsorption and desorption cycles of the entire system.
And (3) balance tank: the gas exiting the secondary adsorption tower is stored and equilibrated to a concentration greater than 93% but not up to the standard of pure oxygen of greater than 99.5%, referred to in the present system as sub-oxygen.
A secondary adsorption tower group 5: in this embodiment, the second-stage adsorption tower set 5 is an adsorption tower, stores part of 99.5% oxygen product gas, and performs secondary purification on substandard gas.
A buffer tower 6: the obtained oxygen with the concentration of 99.5 percent is dried by a pure oxygen buffer tower, and the dew point is reduced.
The electrically controlled valves A-I correspond to the reference numerals 11-19 in FIG. 2, the electrically controlled valves J-N correspond to the reference numerals 110-114 in FIG. 2, the electrically controlled valve S corresponds to the reference numeral 115 in FIG. 2, and the electrically controlled valves P-R correspond to the reference numerals 116-118 in FIG. 2: and a pneumatic normally closed shuttle valve is adopted and is controlled to be opened and closed by an electric control system.
And (3) a filter 8: the main functions are dust removal, water removal, bacteria removal and the like for the gas flowing through.
Ball valve A, B, C is labeled as reference numerals 121, 122 and 123 in fig. 2: the control of the gas flow is realized by changing the opening degree of the valve.
Needle valves A-D correspond to reference numerals 41-44 in FIG. 2, respectively: the needle valve is used in cooperation with the quick connector and is mainly used for measuring the oxygen concentration at the position.
The pressure regulating valves a-C correspond to reference numerals 31-33 in fig. 2, respectively, and reduce the pressure of the gas flowing therethrough and maintain a stable outlet pressure.
And a pressure sensor 9 for testing and returning the gas pressure data of each outlet.
The control mode of the components is as follows:
all components and parts of the device are controlled by an electric control system, and main action links such as air inlet, pressure adsorption, pressure equalization, waste gas exhaust, pressure reduction analysis air extraction, sub-oxygen recycling and the like are realized by controlling the opening and closing of all valves and an oxygen compressor and controlling the duration of action. The device has a specially designed valve group system control program.
The working principle of the invention is as follows:
firstly, air intake. Oxygen-containing air with the concentration of 80 percent and the pressure of 0.4Mpa is taken as an air inlet source and stably enters through a pressure regulating valve A31. At the moment, the needle valve A41 is matched with a quick connector for use and is mainly used for measuring the oxygen concentration at the position, the valve A11 or the valve B12 is opened after the host program judges that the concentration meets the air inlet requirement, and the adsorption tower A21 and the adsorption tower B22 start to alternately and continuously perform pressure-increasing adsorption and pressure-reducing analysis processes.
And secondly, taking two adsorption towers as an example, carrying out double-tower pressure swing purification. Taking the process of pressure-increasing adsorption in the adsorption tower a21 and pressure-decreasing desorption in the adsorption tower B22 as an example, at this time, the valve a11 is opened, the valve B12 is closed, the oxygen-containing air only enters the adsorption tower a21 for pressure-increasing adsorption, the carbon molecular sieve adsorbent in the adsorption tower a21 selectively adsorbs oxygen, and other impurity gases enter subsequent pipelines and are released and discharged through the valve I19. Meanwhile, the adsorption tower B22 (which has been subjected to the previous cycle of pressure-increasing adsorption process) is subjected to a vacuumizing desorption process, the valve D14 is opened, oxygen adsorbed by the adsorbent is desorbed and extracted through the vacuumizing of the oxygen compressor 4, the valve N114 is opened at the same time, and the extracted oxygen enters the secondary adsorption tower set 5 to prepare for the second purification.
Thirdly, the sub-oxygen is reused. At this time, other valves are closed, the valve K111, the valve I19 and the valve E15 are opened, the balance tank 3 stores the sub-oxygen after the previous round of purification, and the gas enters the adsorption tower A21 for re-purification.
And fourthly, two-stage adsorption. Other valves are closed, the valve D14 and the valve I19 are opened, the adsorption tower B22 continues to analyze, the valve N114 and the valve R118 are opened, the analyzed gas enters the secondary adsorption tower group 5 after being pressurized for second purification, and the generated sub-oxygen after purification is discharged and enters the balance tank 3 for storage for next reuse.
And fifthly, secondary analysis. Other valves are closed, the valve D14 and the valve I19 are opened, and the adsorption tower B continues to analyze; and opening a valve L112 and a valve S115, pumping out the oxygen adsorbed in the secondary adsorption tower group 5 by a compressor, and introducing the oxygen into the pure oxygen buffer tower 6 for dewatering and drying to reduce the dew point.
Sixthly, pressure equalizing of the A/B tower of the adsorption tower: the other valves are closed, valve H18 is opened, pressure equalization is carried out on adsorption towers A and B, valve M113 is opened, and oxygen compressor 4 is started to carry out the self-circulation process.
And seventhly, exchanging the process flows of the adsorption tower A and the adsorption tower B.
After the oxygen in the buffer tower is detected to reach the pressure and the concentration, the oxygen is further sterilized and dried by a filter and enters an oxygen storage tank for collection.
The oxygen prepared by the device completely accords with the regulations of various indexes related to medical and aviation oxygen in GB 8982-2009 oxygen for medical and aviation breathing and Chinese pharmacopoeia through the detection of a third-party professional institution.
Example two:
a method for purifying medical oxygen, comprising the steps of:
step one, based on the purification device in the embodiment one;
step two, air inlet: oxygen-containing air with the concentration of more than 80% is used as an air inlet source, the oxygen-containing air stably enters the air inlet source through a pipeline valve bank between the empty tank 1 and the primary adsorption tower group 2, the oxygen concentration at the oxygen inlet source is measured, and a valve on the pipeline valve bank between the empty tank 1 and the primary adsorption tower group 2 is opened after the main machine program in the electric cabinet 0 judges that the concentration meets the air inlet requirement;
step three, taking two adsorption towers as an example, performing double-tower pressure swing purification: the adsorption tower A21 in the first-stage adsorption tower group 2 is used for pressure boosting adsorption, the adsorption tower B22 is used for pressure reduction and resolution, a valve on a pipeline valve group connected with the adsorption tower A21 is opened, a valve on a pipeline valve group connected with the adsorption tower B22 is closed, oxygen-containing air only enters the adsorption tower A21 for pressure boosting adsorption, the carbon molecular sieve adsorbent selectively adsorbs oxygen, and other impurity gases are released and exhausted through the pipeline valve group communicated with the outside through the first-stage adsorption tower group 2; meanwhile, the adsorption tower B22 which has finished the pressure-increasing adsorption process in the previous round is vacuumized and analyzed, a pipeline valve group communicated with the primary adsorption tower group 2 and the secondary adsorption tower group 5 is opened, the oxygen adsorbed by the adsorbent is analyzed and extracted by vacuumizing the compressor 4, and the extracted oxygen enters the secondary adsorption tower group 5 to prepare for the second round of purification;
step four, reutilization of the dioxygen: at the moment, other pipeline valve banks are closed, the pipeline valve bank connected with the adsorption tower A21 and the balance tank 3 is opened, the previous round of purified sub-oxygen is stored in the balance tank 3, and the gas enters the adsorption tower A21 for re-purification;
step five, secondary adsorption: other valves are closed, a pipeline valve group connected with the adsorption tower B22 and the secondary adsorption tower group 5 is opened, the desorption gas is pressurized and then enters the secondary adsorption tower group 5 for second-round purification, the adsorption tower B22 continues to be desorbed, a pipeline valve group connected with the balance tank 3 and the secondary adsorption tower group 5 is opened, and the generated dioxygen after purification is discharged and enters the balance tank 3 for storage for next reuse;
step six, secondary analysis: opening a pipeline valve group connecting the adsorption tower A21 and the secondary adsorption tower group 5, and continuing to analyze the adsorption tower B22; a pipeline valve group connected with the secondary adsorption tower group 5 and the buffer tower 6 is opened, oxygen adsorbed in the secondary adsorption tower group 5 is pumped out by a compressor and enters the buffer tower 6 for dewatering and drying, and the dew point is reduced;
step seven, pressure equalization of the first-stage adsorption tower group 2: other valves are closed, a pipeline valve group between the adsorption towers of the first-stage adsorption tower group 2 is opened, pressure equalization is carried out between the adsorption towers, meanwhile, an electric control valve forming loop connection at two ends of the compressor 4 is opened, and the compressor 4 is started in a self-circulation process;
and step eight, exchanging the process flows of the adsorption tower A21 and the adsorption tower B22.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A purification device of medical oxygen is characterized in that: the device comprises an electric cabinet (0) and a purification system electrically connected with the electric cabinet (0), wherein the purification system comprises an empty tank (1), a primary adsorption tower set (2), a balance tank (3), a secondary adsorption tower set (5) and an oxygen storage tank (10) which are sequentially connected, the primary adsorption tower set (2) is also communicated with the secondary adsorption tower set (5) through a first pipeline valve set, a compressor (4) is arranged on the first pipeline valve set, the oxygen storage tank (10) is connected with the compressor (4), the primary adsorption tower set (2) is communicated with the outside through a second pipeline valve set,
the first-stage adsorption tower group (2) and the second-stage adsorption tower group (5) are filled with carbon molecular sieves, and pressure-rising adsorption and pressure-reducing analysis are alternately performed among adsorption towers of the first-stage adsorption tower group (2).
2. The purification apparatus of medical oxygen according to claim 1, further comprising a buffer column (6) interposed between the oxygen storage tank (10) and the secondary adsorption column set (5).
3. The purification device of medical oxygen as claimed in claim 1, wherein the outlet of the empty tank (1) is communicated with the primary adsorption tower set (2) through a regulating valve A (31),
the outlet of the first-stage adsorption tower group (2) is communicated with a second-stage adsorption tower group (5) through the first pipeline valve group, the inlet of the first-stage adsorption tower group (2) is communicated with the balancing tank (3) through a third pipeline valve group, a compressor (4) is arranged on the third pipeline valve group,
the outlet of the secondary adsorption tower group (5) is communicated with the inlet of the balancing tank (3) through a fourth pipeline valve group, the outlet of the secondary adsorption tower group (5) is communicated with the oxygen storage tank (10) through a compressor (4),
and the two ends of the compressor (4) are communicated through a fifth pipeline valve group.
4. The purification apparatus of medical oxygen as claimed in claim 3, wherein the primary adsorption tower set (2) comprises an adsorption tower A and an adsorption tower B, the adsorption tower A and the adsorption tower B are respectively connected to the first pipeline valve set through a seventh pipeline valve set, the adsorption tower A and the adsorption tower B are respectively connected to the regulating valve A (31) through an eighth pipeline valve set, and the adsorption tower A and the adsorption tower B are respectively connected to the third pipeline valve set through a ninth pipeline valve set.
5. The apparatus of claim 4, wherein the adsorption tower A and the adsorption tower B are connected by a tenth valve bank.
6. A purification apparatus for medical oxygen according to claim 3, wherein pressure sensors (9) are arranged on the pipeline connecting the compressor (4) and the oxygen storage tank (10), the inlet of the empty tank (1), the outlet of the primary adsorption tower set (2), the inlet of the equilibrium tank (3), the outlet of the secondary adsorption tower set (5) and the outlet of the buffer tower (6).
7. The purification apparatus of medical oxygen as claimed in claim 3, wherein a needle valve A (41) for measuring oxygen concentration is provided on the pipeline between the pressure regulating valve A (31) and the primary adsorption tower set (2), a silencer and a needle valve B (42) for measuring oxygen concentration are provided on the second pipeline valve set, a needle valve C (43) for measuring oxygen concentration is provided on the fourth pipeline valve set, and a needle valve D (44) for measuring oxygen concentration is provided on the pipeline valve set between the oxygen storage tank (10) and the compressor (4).
8. The apparatus of claim 7, wherein a ball valve A (121) is disposed between the pressure regulating valve B (32) and the silencer, a ball valve B (122) is disposed on the fourth pipeline, and a ball valve C (123) is disposed between the compressor (4) and the oxygen storage tank (10).
9. A method for purifying medical oxygen is characterized in that: the method comprises the following steps:
step one, based on the purification device of any one of claims 1 to 8;
step two, air inlet: oxygen-containing air is taken as an air inlet source and stably enters through a pipeline valve group between the empty tank (1) and the primary adsorption tower group (2), and the oxygen concentration at the position is measured;
step three, pressure swing purification of the adsorption tower set: at least one group of adsorption towers A in the primary adsorption tower group (2) performs pressure-increasing adsorption, and at least one group of adsorption towers B performs pressure-decreasing analysis;
step four, the oxygen-containing air only enters the adsorption tower group to be subjected to pressure-boosting adsorption; meanwhile, the adsorption tower to be subjected to decompression analysis is subjected to vacuum pumping analysis, and the oxygen subjected to analysis enters a secondary adsorption tower set (5) to be subjected to pressure boosting adsorption and decompression analysis again; oxygen generated in the secondary adsorption tower group (5) is pumped out and enters an oxygen storage tank (10);
and step five, when the preset time is reached, the adsorption tower A and the adsorption tower B in the adsorption tower group (2) perform adsorption and desorption process exchange, so that the adsorption tower A performs depressurization and desorption and the adsorption tower B performs pressure-boosting adsorption, and the step four is executed, and the steps are circulated in sequence.
10. The method of claim 9, wherein the step of purifying the medical oxygen comprises: the method further comprises the following steps: and (3) reutilization of the sub-oxygen: and the sub-oxygen stored in the balancing tank (3) enters an adsorption tower to be subjected to pressure boosting adsorption for re-purification.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5766310A (en) * | 1996-07-19 | 1998-06-16 | Litton Systems Incorporated | Single stage secondary high purity oxygen concentrator |
| CN1470312A (en) * | 2003-07-04 | 2004-01-28 | 黄公连 | Single-tower pressure-swing adsorption air-separating method |
| CN104340961A (en) * | 2014-11-18 | 2015-02-11 | 武汉恒业通气体设备有限公司 | Pressure swing adsorption oxygen generating equipment and method |
| CN106744699A (en) * | 2017-03-17 | 2017-05-31 | 武汉恒业通气体设备有限公司 | A kind of omnibus control system and oxygen purification integral system and method |
| CN210635725U (en) * | 2019-05-18 | 2020-05-29 | 山西汾西重工有限责任公司 | Preparation facilities of high-purity oxygen |
| CN112004774A (en) * | 2020-04-14 | 2020-11-27 | 成都盈辰科技有限公司 | Method for producing oxygen by adopting pressure swing adsorption technology |
-
2021
- 2021-11-30 CN CN202111442148.7A patent/CN114180529A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5766310A (en) * | 1996-07-19 | 1998-06-16 | Litton Systems Incorporated | Single stage secondary high purity oxygen concentrator |
| CN1470312A (en) * | 2003-07-04 | 2004-01-28 | 黄公连 | Single-tower pressure-swing adsorption air-separating method |
| CN104340961A (en) * | 2014-11-18 | 2015-02-11 | 武汉恒业通气体设备有限公司 | Pressure swing adsorption oxygen generating equipment and method |
| CN106744699A (en) * | 2017-03-17 | 2017-05-31 | 武汉恒业通气体设备有限公司 | A kind of omnibus control system and oxygen purification integral system and method |
| CN210635725U (en) * | 2019-05-18 | 2020-05-29 | 山西汾西重工有限责任公司 | Preparation facilities of high-purity oxygen |
| CN112004774A (en) * | 2020-04-14 | 2020-11-27 | 成都盈辰科技有限公司 | Method for producing oxygen by adopting pressure swing adsorption technology |
Non-Patent Citations (1)
| Title |
|---|
| 金浩 等: ""弥散供氧的实验及仿真研究"", 《低温与特气》 * |
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