KR101384263B1 - Apparatus for generating concentrated gas being capable of controlling concentration flow rate of desorbed gas - Google Patents

Abstract

The present invention relates to: a method of selectively collecting oxygen or nitrogen in the air using a pressure circulation absorption method (hereinafter called ′PSA′); and an apparatus for generating concentrated gas, which controls the concentration and the flow rate of the concentrated gas using the concentration of desorbed gas while measuring the concentration during a regeneration of an absorption tower in real time.

Description

A concentrated gas generator which controls the concentration and flow rate of the concentrated gas by using the concentration of desorbed gas {APPARATUS FOR GENERATING CONCENTRATED GAS BEING CAPABLE OF CONTROLLING CONCENTRATION FLOW RATE OF DESORBED GAS}

The present invention provides a method for selectively recovering oxygen or nitrogen in air by a pressure circulating adsorption method (hereinafter referred to as 'PSA'), and real-time measurement of the concentration at the time of desorption of the adsorption tower. A concentrated gas generator for controlling the flow rate.

Today, concentrated gas generators are used in many different places. Most commonly, oxygen is supplied to confined spaces in offices and homes to help recover the fatigue accumulated in the daily lives of modern people and to activate the cells, and to provide oxygen to patients in operating rooms and ambulances in hospitals. Medical concentrated gas generator is used.

In addition, various types of concentrated gas generators have been used for automobiles for supplying oxygen in sealed vehicles, for filling air tanks for divers, and for use in wastewater treatment plants or fish farms.

In addition, it is stored for a long time by the storage and packaging of food using nitrogen, it is used for heat treatment oxidation prevention and dangerous gas removal.

These small-scale enriched gas generators include an adsorption tower including a ZMS and CMS adsorption bed that separates nitrogen and oxygen from air, an operation unit related to air compression , storage, and discharge, a control unit for opening and closing a valve, Consists of a pipe for joining.

The concentrated gas generator is concentrated by adsorbing relatively superior nitrogen or oxygen into the adsorption bed from the compressed air supplied into the adsorption tower including a ZMS (nitrogen adsorbent) and a CMS (oxygen adsorbent) adsorption bed. Generates nitrogen and oxygen. The gas concentrated in this manner is supplied to the required place via the concentrated gas storage tank, and the gas adsorbed in the adsorption tower is separated from the adsorption tower while being at atmospheric pressure when releasing the air pressure applied to the adsorption tower.

Is referred to as: (Pressure Swing Adsorption PSA) method In this way, the supply of compressed air into the adsorption column and compressing method for generating enriched gas by a method of desorption of the adsorbed gas in the adsorption tower at atmospheric pressure swing adsorption.

The PSA method is a technology for selectively separating and concentrating nitrogen and oxygen in the atmosphere to produce high purity oxygen and nitrogen, and has an advantage of high energy efficiency.

In order to produce nitrogen and oxygen in PSA type gas generator, many parts such as adsorption tower, solenoid valve, concentrated gas storage tank, and air compressor are used, and piping and piping are used for connection between parts.

1 is a block diagram showing a conventional PSA concentrated gas generator.

Referring to FIG. 1, an air inlet, an air compressor, an air regulator, a first pressure gauge, a supply valve, a silencer, an adsorption tower, a circulation valve, a flow control valve, a discharge valve, a storage tank, a pressure switch, and a controller are included. It is also composed of a water filter, a combined filter, a first safety valve, a check valve, a needle valve, a second pressure gauge, a second safety valve, and a third pressure gauge.

The air compressor is connected to the air intake port and the control unit to suck outside air under the control of the control unit, compresses the air passing through the air intake port, and then supplies the compressed air to the internal flow path of the concentrated gas generator.

The air regulator 100 is connected to the air compressor to adjust the pressure of the compressed air passed through the air compressor.

The moisture filter filters a predetermined amount of moisture contained in the compressed air, and the coalescing filter removes impurities of the compressed air that have passed through the moisture filter.

The supply valve 130 is connected to the air regulator 100 and a control unit (not shown), and selectively regulates a flow path of the compressed air passing through the air regulator 100 to inlet and first of the first adsorption tower 180. 2 alternately connect the inlets of the adsorption tower 190.

In addition, the supply valve 130 selectively connects the inlet port of the first adsorption tower 180 and the inlet port of the second adsorption tower 190 with the silencer 140 to allow the inlet port of the first adsorption tower 180 and the second adsorption tower 190. Compressed air discharged from the inlet of the discharge through the silencer 140 to the outside.

The first discharge valve 240 and the second discharge valve 250 discharge 99.99% of pure nitrogen and 90% of pure oxygen according to ZMS (nitrogen adsorbent) and CMS (oxygen adsorbent) having selective adsorption properties to discharge oxygen and nitrogen. It serves to supply the storage tank (290).

The first flow control valve 220 and the second flow control valve 230 serves to adjust the amount of cleaning for the regeneration of the adsorption tower during the desorption.

By selectively controlling the time at which the first discharge valve 240 and the second discharge valve 250 are simultaneously opened, the concentration and storage amount of the finally produced concentrated gas are adjusted.

The circulation valve 170 and the check valves 200 and 210 serve to increase the recovery rate of the supply air.

The conventional concentrated gas generator is a method of controlling the amount of cleaning by selectively controlling the discharge time by using the flow control valves (220, 230) and selectively opening the discharge valves (240, 250) at the same time.

However, the pressure switch of the storage tank simply closes the discharge valves (240, 250) when the amount of concentrated gas is high, and opens the discharge valves (240, 250) when the amount of the gas is low. It is difficult to match the concentrations of the two adsorption towers 180 and 190 and the concentration imbalance of the adsorption towers 180 and 190 is generated.

Therefore, there is a problem that the variation in concentration and manufacturing time is prolonged and the production capacity is lowered when the concentrated gas is used.

In addition, the circulation valve 170 serves to increase the recovery rate of the supply air, but there is no production of concentrated gas during the time that the pressures are equalized to both adsorption towers 180 and 190, thereby lowering the yield.

However, the same pressure time during pressurization in the adsorption tower (180, 190) is not able to regenerate at a fixed flow rate and concentration, and the concentration and storage volume by adjusting the concentration and storage volume by opening and closing the discharge valve (240, 250) It is difficult to balance the two adsorption towers 180 and 190 filled with the adsorbent, resulting in an unbalanced concentration of one adsorption tower 240 and 250. As a result, there is a problem in that the concentration variation occurs when using the concentrated gas.

The present invention has been made to solve the above problems, by improving the conventional PSA method to improve the problems of the conventional method for selectively concentrating oxygen and nitrogen using a concentrated gas generator, and the conventional concentrated gas generation It is an object of the present invention to provide a concentrated gas generator which controls the concentration and flow rate of the concentrated gas by using the improved form of desorbed gas, which can shorten the production time, increase the yield, and selectively control the concentration and the yield, compared to the apparatus. It is done.

In addition, an object of the present invention is to provide a method for generating a concentrated gas for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas.

In order to achieve the above object, the concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention is provided with an adsorbent having a selective adsorption degree for a specific gas in the air In the concentrated gas generating device for separating the specific gas by passing the compressed air through the compressed adsorption tower, and storing the gas except the specific gas in the air in the storage tank,

A first filter which removes a certain amount of oil contained in the compressed air passing through the air compressor to prevent the inflow into the adsorbent having selective adsorption property; .

A first regulator for adjusting the pressure of the compressed air passing through the air compressor to maintain the compressed air at a constant pressure;

A first needle valve controlling a flow rate according to the adsorption saturation of the compressed air;

A first air supply valve (8) for selectively controlling the adsorption time according to the amount of the adsorbent by intermitting an air passage to the adsorption towers (12, 14) of the compressed air passing through the first regulator and the first needle valve; A second air supply valve 10;

An adsorption tower, in which a first adsorption tower and a second adsorption tower are installed in parallel to separate the specific gas from the compressed air introduced through the supply valve and discharge the gas except the specific gas from the air to the outlet;

The first purge valve 16 and the second purge valve 18 which desorb the gas adsorbed by the adsorbent in the first adsorption tower 12 and the second adsorption tower 14 for regeneration (cleaning, desorption) and discharge the air to the atmosphere. );

The gas adsorbed by the adsorbent in the first purge valve 16 and the second purge valve 18 of the first adsorption tower 12, the second adsorption tower 14 is desorbed for regeneration to remove noise during air discharge. Giving silencer (20);

The concentrated adsorption gas separated by the adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14 is sent to the storage tank 40 to increase the air regeneration amount during pressurization and desorption. First and second discharge pressure equalizing valves 28 and 30 to equalize the pressures of the first and second adsorption towers 12 and 14 for the purpose.

The flow rate of the storage tank 40 is controlled by sending a concentrated gas having low adsorption to the storage tank 40 separated by the adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14. A second needle valve for controlling pressure;

When the pressure of the low concentration adsorption gas separated by the adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14 passing through the discharge pressure check valve is less than the pressure of the storage tank 40. A first check valve 34 to prevent backflow;

It is a storage space of a low adsorption gas concentrated gas separated by an adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14, and the second adsorption tower 14 in the first adsorption tower 12. Storage tank 40 which can use the flow rate of the stored concentrated gas when the output of the concentrated gas is reduced and the uniform flow rate cannot be supplied in real time when switching to the;

A first flow meter (36) for sending a flow rate for detection to a second detection sensor (40) for measuring the purity of said concentrated gas;

A second detection sensor 38 for detecting a real-time purity of the concentrated gas so that a user easily grasps the change in purity;

A second flow meter 56 for detecting a change in flow rate by the user by detecting and displaying the discharge flow rate of the concentrated gas at any time;

The first air supply valve (8), the second air supply valve (10), the first purge valve

16, the second purge valve 18, the first discharge pressure check valve 28, the second discharge pressure check valve 30, the second detection sensor 38, the control unit electrically connected to the second flow meter 56 (58);

The controller 58 reads the flow rate of the second flow meter 56 to determine whether to produce a concentrated gas, and when a signal for supplying the flow rate to the concentrated gas is generated, the first air supply valve 8 and the second purge valve ( 18), by simultaneously opening the first discharge pressure check valve 28 to introduce compressed air into the first adsorption tower 12 to produce a concentrated gas,

At this time, in order to reduce the amount of compressed air used, the first exhaust pressure check valve 28 and the second discharge pressure check valve 30 are simultaneously opened, and the concentrated gas in the first adsorption tower 12 is introduced into the second adsorption tower 14. Kept at the same pressure,

The second air supply valve (10), the first purge valve (16), the second discharge pressure equalizing valve (30) are opened at the same time to introduce compressed air into the second adsorption tower (14) to produce a concentrated gas. ,

The concentrated gas generator further includes a first detection sensor 22 connected to the muffler 20 and electrically connected by the control unit.

The concentrated gas generator further includes a cleaning valve 42 disposed between the storage device and the first and second discharge pressure equalizing valves 28 and 30.

The cleaning valve 42 measures the real-time discharge purity of the first adsorption tower 12 and the second adsorption tower 14 with respect to a part of the concentrated gas of the storage tank 40, and adjusts the proportional control to adsorb the adsorbent. Characterized in that the portion of the concentrated gas stored in the storage tank for regeneration of the adsorbent when the desorbed gas is desorbed to selectively enter the first adsorption tower 12 or the second adsorption tower 14,

In the storage tank 40, the cleaning valve 42, the second check valve 44, and the cleaning valve 42 are disposed between the first discharge pressure equalizing valve 28 and the second pressure equalizing valve 30. The concentrated gas moves to the outlet of the first adsorption tower 12 or the second adsorption tower 14, and prevents the concentration of the gas from the first adsorption tower 12 or the second adsorption tower 14 to the storage tank 40. Second check valve 44;

And a third needle valve 46 for controlling the flow rate of the concentrated gas by measuring the real-time discharge purity of the concentrated gas of the storage tank 40 to the first adsorption tower 12 or the second adsorption tower 14. Characterized in that

The adsorbent is ZMS (nitrogen adsorbent), characterized in that the gas other than the specific gas in the air is oxygen,

The adsorbent is CMS (oxygen adsorbent), characterized in that the gas other than the specific gas in the air is nitrogen.

In order to achieve the above another object, the concentrated gas generation method for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention, the adsorbent having a selective adsorption degree for a specific gas in the air In the concentrated gas generating method of generating a concentrated gas by separating the specific gas by passing the compressed air to the first and second adsorption tower equipped with a second, and storing the gas except the specific gas in the air in the storage tank,

When the first air supply valve 8, the first discharge pressure equalizing valve 28, and the second purge valve 18 are opened at the same time, compressed air flows into the first adsorption tower 12, and the oxygen gas flows from the first air. It is selectively separated by the adsorbent packed in the adsorption tower 12, the separated gas is stored in the storage tank 40 through the first discharge pressure check valve 28, and at the same time the second purge valve 18 is opened A first step of desorbing and regenerating the gas adsorbed to the adsorption tower (14);

The first discharge pressure equalizing valve 28 and the second pressure equalizing pressure valve 30 are opened in order to match the pressure with the low pressure second suction column 14 in the high pressure first suction tower 12. The second air supply valve 8 is opened together so that the concentrated gas is produced and introduced into the storage tank 40;

When the second air supply valve 10, the second discharge pressure equalization valve 30, and the first purge valve 16 are opened at the same time as the first step, the compressed air flows into the second adsorption tower 14. The introduced air is selectively separated from the adsorbent filled in the second adsorption tower 14, and the separated gas is stored in the storage tank 40 through the second discharge pressure equalizing valve 30 and simultaneously opened. The purge valve 16 desorbs and regenerates the gas adsorbed on the first adsorption tower 12, and at this time, a part of the concentrated gas together with the desorbed gas is discharged through the first purge valve 16. When the purity of the concentrated gas discharged through the purge valve 16 is lower than the set purity, the washing valve 42

A third step of opening a portion of the concentrated gas stored in the storage tank 40 to be introduced into the first adsorption tower 12 for cleaning;

When the flow rate is zero, the concentrated gas generator stops and the pressure in the storage tank 40 decreases below the use pressure. And a fourth step of operating.

According to the present invention, a concentrated gas generator and a method of generating a concentrated gas, which control the concentration and flow rate of the concentrated gas by using the concentration of desorbed gas, provide a method for the concentration of the concentrated gas from which the first detection sensor is discharged in real time during cleaning in the adsorption column. The amount of concentrated gas stored in the storage tank used for cleaning the adsorption tower by detecting the purity and opening the cleaning valve to supply a part of the concentrated gas from the storage tank to the adsorption tower when the discharge gas is lower than the set value. It is effective to control.

In addition, the circulation valve 170 of the conventional concentrated gas generator shown in FIG. 1 serves to increase the recovery rate of the supply air, but the supply valve is closed during the pressure equalization to both of the adsorption towers 180 and 190, thereby reducing the pressure of the compressed air. Since there is no production of new concentrated gas through inflow, the production time of the concentrated gas is long and the yield decreases.

However, in the present invention, the problem of lowering the output during the time when the pressures of the two adsorption towers are equalized by the conventional circulation valve is opened at the same time by opening the first and second discharge equalization valves and the air supply valve which is the pressure valve at the same time. There is a remarkable effect of increasing the production time and the production amount of the concentrated gas by opening the air supply valve, which is a pressurized valve, which is not pressurized gas, so that the concentrated gas is produced in the adsorption tower.

1 is a configuration diagram showing a concentrated gas generator according to a conventional comparative example.
Figure 2 is a block diagram showing a condensation gas generator for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention.

Hereinafter, the concentrated gas generator and the concentrated gas recovery method for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to a preferred embodiment of the present invention will be described in detail.

In order to clearly understand the working relationship of the components according to the present invention, the air flow is indicated by a solid line and the control signal is indicated by a dotted line.

Figure 2 is a block diagram showing a condensation gas generator for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention.

Referring to FIG. 2, air is introduced into the concentrated gas generator according to the present invention along the flow path and compressed air according to ZMS (nitrogen adsorbent) or CMS (oxygen adsorbent) having selective adsorption to the adsorption towers 12 and 14. Separate concentrated gas of oxygen or nitrogen.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first filter (2).

The first filter 2 serves to prevent the inflow into the adsorbent having selective adsorption by removing a certain amount of oil contained in the compressed air passing through the air compressor.

The concentrated gas generator which controls the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first regulator (4).

The first regulator 4 maintains the compressed air at a constant pressure by adjusting the pressure of the compressed air passing through the air compressor to maintain the same adsorption time of the first adsorption tower 12 and the second adsorption tower 14. Play a role.

The concentrated gas generator which controls the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first needle valve 6.

The first needle valve 6 serves to control the flow rate according to the adsorption saturation of the compressed air.

The concentrated gas generator for controlling the concentration and flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first air supply valve 8 and a second air supply valve 10.

The first air supply valve 8 and the second air supply valve 10 serve to selectively control the adsorption time according to the amount of the adsorbent by intercepting a flow path of air to the adsorption towers 12 and 14.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first adsorption tower 12 and a second adsorption tower 14.

The first adsorption tower 12 and the second adsorption tower 14 are provided with an adsorbent for preferentially adsorbing characteristic gases therein.

In this case, ZMS (nitrogen adsorbent) or CMS (oxygen adsorbent) may be used as the adsorbent.

When ZMS (nitrogen adsorbent) is used in the first adsorption tower 12 and the second adsorption tower 14 according to the present invention, nitrogen in the air is preferentially adsorbed, and oxygen having low adsorption degree is discharged. At this time, the concentration of oxygen is about 90 ~ 95%.

As another example, when CMS (oxygen adsorbent) is used in the first adsorption tower 12 and the second adsorption tower 14 according to the present invention, oxygen in the air is preferentially adsorbed, and nitrogen having low adsorption degree is discharged. At this time, the concentration of nitrogen is about 99.00 ~ 99.99% including argon and other gases.

In the following, the present invention is explained assuming that ZMS (nitrogen adsorbent), which is an adsorbent for adsorbing nitrogen in the first adsorption tower 12 and the second adsorption tower 14, is used for explanation.

The concentrated gas generator for controlling the concentration and flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a first purge valve 16 and a second purge valve 18.

The first purge valve 16 and the second purge valve 18 serve to desorb the gas adsorbed by the adsorbent in the first adsorption tower 12 and the second adsorption tower 14 to the atmosphere for regeneration. .

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a silencer (20).

The silencer 20 desorbs nitrogen, which is gas adsorbed by the adsorbent, from the first adsorption tower 12, the first purge valve 16 of the second adsorption tower 14, and the second purge valve 18 for regeneration. It acts to remove noise when emitting to the atmosphere.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first detection sensor 22.

The gas (nitrogen) adsorbed by the adsorbent in the first adsorption tower 12 and the second adsorption tower 14 is desorbed for regeneration of the adsorbent and released to the atmosphere, and some of the separated gaseous oxygen gas is adsorbed for regeneration. It is released together with nitrogen, which is a gas.

The first detection sensor 22 measures the real-time purity when a part of the oxygen gas, which is a concentrated gas, is released during cleaning of the adsorption column, and only if the purity of the oxygen gas is detected below the set value. In addition, a partial amount of the concentrated gas from the storage tank 40 to the second adsorption tower 14 is controlled to be opened by the proportional control of the washing valve 42 to minimize the loss of the concentrated gas.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a first pressure gauge 24 and a second pressure gauge 26.

The first pressure gauge 24 and the second pressure gauge 26 frequently detect and display the gas pressure in the first adsorption tower 12 and the second adsorption tower 14 so that the user can easily grasp the pressure change of the inlet air. Can be.

The concentrated gas generator for controlling the concentration and flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a first discharge pressure equalizing valve 28 and a second discharge pressure equalizing valve 30.

The first exhaust pressure equalizing valve 28 and the second pressure equalizing valve 30 are oxygen gas which is a low adsorption gas separated by an adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14. To the storage tank 40, and also serves to equalize the pressure of the first adsorption tower 12 and the second adsorption tower 14 for the purpose of increasing the regeneration amount of compressed air during pressurization and desorption. .

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a second needle valve (32).

When the second needle valve 32 sends oxygen gas, which is a low adsorption concentrated gas, separated into an adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14 to the storage tank 40. The pressure in the storage tank 40 is controlled by adjusting the flow rate.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first check valve 34.

The first check valve 34 is the pressure of the storage tank 40 is the pressure of the oxygen gas is a low adsorption concentrated gas separated by an adsorbent having a selective adsorption capacity in the first adsorption tower 12, the second adsorption tower 14 When less, it serves to prevent backflow.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a storage tank (40).

The storage tank 40 is a storage space for oxygen gas, which is a low adsorption gas concentrated gas separated by an adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14, and the first adsorption tower 12. In the case of switching to the second adsorption tower (14), the output of the concentrated gas is reduced, and thus, it is possible to supply the stored flow rate when the uniform flow rate cannot be supplied in real time.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a first flow meter 36.

The first flow meter 36 serves to send a flow rate for detection to the second detection sensor 40 in order to measure the purity of the oxygen gas, which is a concentrated gas.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a second detection sensor 38.

The second detection sensor 38 detects the real-time purity of the oxygen gas, which is a concentrated gas, so that the user can easily grasp the change in purity.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a washing valve 42.

The cleaning valve 42 is a portion of the oxygen gas that is a concentrated gas of the storage tank 40, the oxygen gas discharged through the purge valve (16, 18) from the first adsorption tower 12 and the second adsorption tower (14) By measuring the real-time discharge purity, if the purity of the oxygen gas falls below the set value, the purity of the discharged oxygen gas is controlled by adjusting the amount of opening of the cleaning valve 42 by proportional control.

As described above, the cleaning valve 42 has a portion of the oxygen gas, which is a concentrated gas for regeneration of the adsorbent when the nitrogen gas adsorbed to the adsorbent in the adsorption towers 12 and 14, is transferred to the first adsorption tower 12 or the second adsorption tower 14. The opening amount is selectively adjusted according to the sensing value of the first detection sensor.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a second check valve 44.

The second check valve 44 moves the concentrated gas from the storage tank 40 to the outlet of the cleaning valve 42, the second check valve 44, the first adsorption tower 12, or the second adsorption tower 14. And it serves to prevent the movement of the concentrated gas from the first adsorption tower 12 or the second adsorption tower 14 to the storage tank 40.

The concentrated gas generator for controlling the concentration and flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a third needle valve 46.

The third needle valve 46 adjusts the flow rate of the concentrated gas by measuring the real-time discharge purity of the concentrated gas of the storage tank 40 to the first adsorption tower 12 or the second adsorption tower 14.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a third pressure gauge 48.

The third pressure gauge 48 easily detects and displays the pressure of the oxygen gas, which is the concentrated gas in the storage tank 40, in which the oxygen gas, which is a concentrated gas having low adsorption, is separated into an adsorbent having selective adsorption performance. Understand the pressure change of the inlet air.

The concentrated gas generator for controlling the concentration and flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a safety valve (50).

The safety valve 50 serves to reduce the internal pressure by opening to the outside when the pressure of the concentrated gas is raised to more than 9.0 bar of the internal pressure of the storage tank (40). That is, the safety valve 50 is provided to prevent safety accidents due to deformation or distortion of the pipe itself, which may be generated by the internal pressure of the storage tank 40 rising to 9.9 bar or more.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a second filter 52.

The second filter 52 serves to prevent dust backflow due to a decrease in strength due to a poor adsorbent.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a second regulator 54.

The second regulator 54 serves to adjust the actual operating pressure by controlling the supply pressure of the concentrated gas.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention includes a second flow meter (56).

The second flow meter 56 detects and displays the flow rate of the oxygen gas, which is a concentrated gas, at any time, so that the user can easily grasp the change in the flow rate.

The concentrated gas generator for controlling the concentration and the flow rate of the concentrated gas by using the concentration of the desorbed gas according to the present invention includes a controller 58.

The control unit 58 is the first air supply valve 8, the second air supply valve 10, the first purge valve 16, the second purge valve 18, the first detection sensor 22, the first It is electrically connected to the discharge pressure equalizing valve 28, the second pressure equalizing valve 30, the second detection sensor 38, the cleaning valve 42, the second flow meter 56.

First, the control part 58 reads the flow volume of the 2nd flowmeter 56, and determines whether a concentrated gas was produced. When a signal of the flow rate supply to the concentrated gas is generated, the first air supply valve 8, the second purge valve 18, and the first discharge pressure equalizing valve 28 are simultaneously opened to introduce the compressed air into the first adsorption tower 12. To produce oxygen gas which is a concentrated gas.

In parallel with this, the purity (30%) of the oxygen gas flowing out from the first adsorption tower 14 discharged to the muffler 20 is detected by the first detection sensor 22 to determine whether it is pure (for example, 10% oxygen purity). If detected), the cleaning valve 42 is selectively adjusted (opening the washing valve 42 proportionally) and regenerated.

Next, when the adsorption of nitrogen, which is a component of high adsorption in compressed air, is saturated with the adsorbent in the first adsorption tower 12, the oxygen purity discharged from the first detection sensor 22 to the atmosphere is often detected. When the concentration decreases, the valve is controlled step by step by sending a signal that determines when the adsorption of nitrogen, which is a component adsorbed in the compressed air, to the adsorbent in the first adsorption tower 12 is saturated.

At this time, in order to reduce the amount of compressed air used, the first discharge pressure check valve 28 and the second discharge pressure check valve 30 are simultaneously opened, and oxygen, which is a concentrated gas in the first adsorption tower 12, is introduced into the second absorption tower 14. To maintain the same pressure.

Then, the second air supply valve 10, the first purge valve 16, and the second discharge valve 30 are simultaneously opened to introduce compressed air into the second adsorption tower 14 to generate concentrated gas.

In parallel with this, the oxygen purity discharged to the silencer 20 is detected by the first detection sensor 22, and the cleaning valve 42 is adjusted by proportional control according to the purity to regenerate the adsorbent.

More specifically, when the compressed air flows into the concentrated gas generator to explain the process of generating the concentrated gas is as follows.

First, the first adsorption tower 12 and the second adsorption tower 14 are provided with an adsorbent that preferentially adsorbs a specific gas therein.

In this case, ZMS (nitrogen adsorbent) is used as the adsorbent.

In the first stage, when the first air supply valve 8, the first discharge pressure equalizing valve 28, and the second purge valve 18 are simultaneously opened, compressed air flows into the first adsorption tower 12 and oxygen is introduced from the introduced air. The gas is selectively separated by the adsorbent packed in the first adsorption tower 12, and the separated oxygen gas is stored in the storage tank 40 through the first discharge pressure check valve 28.

The second purge valve 18 opened at the same time desorbs and regenerates the nitrogen gas adsorbed to the second adsorption tower 14.

At this time, the cleaning valve 42 is opened by proportionally controlling the purity of the oxygen gas detected by the first detection sensor 22.

That is, instead of opening the cleaning valve 42 at 100% at a time, the range of 0 to 100% of the opening of the cleaning valve 42 is proportionally adjusted in accordance with the purity of the detected oxygen gas.

In the second stage, the first discharge pressure equalizing valve 28 and the second pressure equalizing valve (28) for adjusting pressure with the low pressure second suction tower 14 in the high pressure first adsorption tower 12 to increase the recovery rate of the compressed air ( 30).

At this time, since the first air supply valve 8 is open together, oxygen gas, which is a concentrated gas, is produced and introduced into the storage tank 40.

When the second air supply valve 10, the second discharge pressure equalizing valve 30, and the first purge valve 16 are simultaneously opened in the same manner as in the first step to the third step, the compressed air to the second adsorption tower 14 is The introduced and introduced air is selectively separated from the adsorbent filled in the second adsorption tower 14, and the separated oxygen gas is stored in the storage tank 40 through the second discharge pressure check valve 30.

The simultaneously opened first purge valve 16 desorbs and regenerates the nitrogen gas adsorbed on the first adsorption tower 12.

At this time, a portion of the oxygen gas which is a concentrated gas together with the desorbed nitrogen gas is also discharged through the first purge valve 16. 42 may be opened to allow a portion of the oxygen gas, which is a concentrated gas stored in the storage tank 40, to flow into the first adsorption tower 12 for cleaning.

For example, when it is detected that the purity of the oxygen gas discharged together with the nitrogen gas adsorbed through the first purge valve 16 for cleaning the first adsorption tower 12 drops from 30% to 10%, the cleaning valve ( 42) is opened and a portion of the oxygen gas, which is a concentrated gas, flows into the first adsorption tower 12 from the storage tank 40 for cleaning.

Repeated step by step as described above, the flow rate is often detected and displayed by the second flow meter 56, when the use flow rate is 0 (when not in use), the concentrated gas generator stops, and the pressure in the storage tank 40 When it is lower than the working pressure, it is operated to minimize the power consumption due to the loss of compressed air.

Hereinafter, the present invention will be described in detail with reference to the preferred embodiments.

[Examples]

Fill the adsorption column with ZMS (nitrogen adsorbent) with selective adsorption, 1st filter, 1st regulator, 1st needle valve, 1st air supply valve, 2nd air supply valve, 1st adsorption tower, 2nd adsorption tower, 1st Purge valve, 2nd purge valve, silencer, 1st detection sensor, 1st pressure gauge, 2nd pressure gauge, 1st pressure equalization valve, 2nd detection sensor, storage tank, cleaning valve, 2nd check valve, 3rd needle Concentration which controls the concentration and flow rate of the concentrated gas using the concentration of the desorbed gas according to the present invention consisting of a valve, a third pressure gauge, a safety valve, a second filter, a second regulator, a second flow meter, a controller, and a pressure switch. A gas generator was manufactured.

Comparative Example: Prior Art of FIG.

A concentrated gas generator is manufactured under the same conditions as the embodiment according to the present invention, but instead of the cleaning valve 42 for cleaning the embodiment according to the present invention, the first flow control valve 220 and the second flow control valve 230 are provided. And a circulation valve 170 necessary for equalization for regeneration in each adsorption tower (180, 190) to produce a concentrated gas generator.

[Experimental Example]

If the operation to be carried out in accordance with the present invention and the oxygen content in the oximeter of the components of the gas prior art via the technology comparative example it is produced in 93% evaluation function to evaluate which is produced by the compressed air volume and enriched gas flowing into the flow The experiment was carried out, and the results are shown in Table 1 below. At this time, the oxygen concentration is% and the flow rate is expressed as Nm 3 / hr.

Table 1 below shows the results of the functional evaluation of the concentrated gas generator.

division
Oxygen purity
Compressed Air Volume
The amount of concentrated gas produced
Example
93%
61 N㎥ / hr
6.1 N㎥ / hr
Comparative Example
93%
60 N㎥ / hr
5 N㎥ / hr

Example 93% 61 Nm 3 / hr 6.1 Nm 3 / hr

Comparative Example 93% 60 Nm 3 / hr 5 Nm 3 / hr

As can be seen from the experimental results of the embodiment according to the present invention and the comparative example according to the present invention, the amount and volume of the adsorbent of the concentrated gas generator of the comparative example when producing a concentrated gas producing 6.1 Nm 3 / hr in 93% oxygen purity It can be reduced by about 18%, the amount of compressed air is also reduced by about 16% compared to the produced concentrated gas is estimated to improve the efficiency of the concentrated gas generator of the embodiment according to the present invention.

While the preferred embodiments of the present invention have been described above using specific terms, such description is for illustrative purposes only and that various changes and modifications may be made without departing from the spirit and scope of the following claims. Day. Such modified embodiments are not to be understood individually from the spirit and scope of the present invention, but are to be regarded as falling within the scope of the appended claims.

2: first filter 32: second needle valve
4: first regulator 34: first check valve
6: first needle valve 36: first flow meter
8: first air supply valve 38: second detection sensor
10: second air supply valve 40: storage tank
12: first adsorption tower 42: cleaning valve
14: second adsorption tower 44: second check valve
16: first purge valve 46: third needle valve
18: second purge valve 48: third pressure gauge
20: silencer 50: safety valve
22: first detection sensor 52: second filter
24: first pressure gauge 54: second regulator
26: second pressure gauge 56: second flow meter
28: first discharge equalization valve 58: control unit
30: second discharge equalization valve

Claims (6)

In a concentrated gas generating apparatus for separating the specific gas by passing the compressed air through an adsorption tower equipped with an adsorbent having a selective adsorption degree for the specific gas in the air, and storing the gas except the specific gas in the storage tank ,
A first filter for removing an amount of oil contained in the compressed air passing through the air compressor to prevent the inflow into the adsorbent having selective adsorption;
A first regulator for adjusting the pressure of the compressed air passing through the air compressor to maintain the compressed air at a constant pressure;
A first needle valve controlling a flow rate according to the adsorption saturation of the compressed air;
A first air for selectively controlling the adsorption time according to the amount of the adsorbent by interrupting a flow path of air to the first and second adsorption towers 12 and 14 of the compressed air passing through the first regulator and the first needle valve A supply valve 8 and a second air supply valve 10;
A second gas installed in parallel to separate the specific gas from the compressed air introduced into the inlet through the first air supply valve 8 and the second air supply valve 10 and to discharge the gas excluding the specific gas from the air to the outlet; A first adsorption tower and a second adsorption tower;
The first purge valve 16 and the second purge valve 18 which desorb the gas adsorbed by the adsorbent in the first adsorption tower 12 and the second adsorption tower 14 to the atmosphere for regeneration of the adsorbent. ;
The gas adsorbed by the adsorbent at the first purge valve 16 connected to the first adsorption tower 12 and the second purge valve 18 connected to the second adsorption tower 14 is desorbed for regeneration of the adsorbent. A silencer 20 to remove noise when emitting to the air;
The low adsorption gas separated by the adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14 is sent to the storage tank 40,
The first adsorption tower 12 for the purpose of increasing the regeneration amount of the compressed air when pressurizing the compressed air into the first and second adsorption towers 12 and 14 and desorbing the gas adsorbed by the adsorbent; A first discharge pressure equalizing valve 28 and a second discharge pressure equalizing valve 30 for equalizing the pressures of the second adsorption tower 14;
The flow rate of the storage tank 40 is controlled by sending a concentrated gas having low adsorption to the storage tank 40 separated by an adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14. A second needle valve for controlling pressure;
Low concentration of adsorption separated by an adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14 passing through the first discharge pressure check valve 28 and the second discharge pressure check valve 30 A first check valve 34 for preventing backflow when the pressure of the gas is less than the pressure of the storage tank 40;
It is a storage space of a low adsorption gas concentrated gas separated by an adsorbent having selective adsorption performance in the first adsorption tower 12 and the second adsorption tower 14, and the second adsorption tower 14 in the first adsorption tower 12. Storage tank 40 which can use the flow rate of the stored concentrated gas when the output of the concentrated gas is reduced and the uniform flow rate cannot be supplied in real time when switching to the;
A first flow meter (36) for sending a flow rate for detection to a second detection sensor (38) for measuring the purity of said concentrated gas;
A second detection sensor 38 for detecting a real-time purity of the concentrated gas so that a user easily grasps the change in purity;
A second flow meter 56 for detecting a change in flow rate by the user by detecting and displaying the discharge flow rate of the concentrated gas at any time; And
The first air supply valve 8 and the second air supply valve 10 and the first purge valve 16 and the second purge valve 18 and the first discharge pressure equalizing valve 28 and the second discharge pressure equalizing valve ( 30 and a controller 58 electrically connected to the second detection sensor 38 and the second flow meter 56; Lt; / RTI >
The controller 58 reads the flow rate of the second flow meter 56 to determine whether to produce a concentrated gas, and when a signal for supplying the flow rate to the concentrated gas is generated, the first air supply valve 8 and the second purge valve (18) and the first discharge pressure equalizing valve (28) are simultaneously opened to introduce compressed air into the first adsorption tower (12) to produce concentrated gas,
After the compressed air flows into the first adsorption tower 12, the first exhaust pressure check valve 28 and the second discharge pressure check valve 30 are simultaneously opened to reduce the amount of the compressed air used, thereby allowing the first air pressure to be reduced. The concentrated gas in the adsorption tower 12 is introduced into the second adsorption tower 14 and maintained at the same pressure.
Desorption, characterized in that to open the second air supply valve 10, the first purge valve 16 and the second discharge valve 30 at the same time to enter the compressed air into the second adsorption tower 14 to produce a concentrated gas. A concentrated gas generator for controlling the concentration and flow rate of the concentrated gas using the concentration of the gas.
The method according to claim 1,
The concentrated gas generator further includes a first detection sensor 22 connected to the muffler 20 and electrically connected by the control unit.
And a cleaning valve 42 provided between the storage tank 40, the first discharge pressure equalizing valve 28, and the second discharge pressure equalizing valve 30, wherein the cleaning valve is formed of the storage tank 40. For a portion of the concentrated gas, the real-time discharge purity of the first adsorption tower 12 and the second adsorption tower 14 is measured and adjusted in proportional control to the storage tank for regeneration of the adsorbent upon desorption of the gas adsorbed on the adsorbent. The concentration and flow rate of the concentrated gas are controlled by using the concentration of the desorbed gas, which is characterized in that a part of the stored concentrated gas selectively controls the inflow of the first adsorption tower 12 or the second adsorption tower 14. Enriched gas generator.
3. The method of claim 2,
Between the cleaning valve and the first and second discharge pressure equalizing valve,
The concentrated gas moves from the storage tank 40 to the outlet of the first adsorption tower 12 or the second adsorption tower 14, and the storage tank in the first adsorption tower 12 or the second adsorption tower 14 A second check valve 44 which prevents the movement of the condensed gas into a 40; And
A third needle valve 46 for adjusting the flow rate of the concentrated gas by measuring the real-time discharge purity of the concentrated gas of the storage tank 40 to the first adsorption tower 12 or the second adsorption tower 14 is measured. A concentrated gas generator for controlling the concentration and flow rate of the concentrated gas using the concentration of the desorbed gas, characterized in that it comprises a.
The method according to claim 1,
And the adsorbent is ZMS, and the gas except for the specific gas is oxygen. The concentrated gas generator is configured to control the concentration and flow rate of the concentrated gas by using the concentration of the desorbed gas.
The method according to claim 1,
And the gas adsorbent is CMS, and the gas except for the specific gas is nitrogen. The concentrated gas generator is configured to control the concentration and flow rate of the concentrated gas by using the concentration of the desorbed gas.
delete

Images