TW526088B - Dehumidifying method for compressed gas and its apparatus - Google Patents

Abstract

This invention is to reduce running costs both a dehumidifying method for compressed gas and its apparatus; in which during an energy saving operation, adsorbents in both absorbing cylinders are concurrently deteriorated to suppress variation in dew point when a normal operation is restored; thereby replacement operations of adsorbents of both cylinders are simultaneously carried out. In a method for dehumidifying compressed air: a drying process, in which gas is adsorbed and dried in one of two adsorbing cylinders 3, 4 each charged with adsorbents, and a regenerating process, in which a part of the obtained dried gas is led to the other adsorbing cylinder to desorb the moisture from the adsorbents concurrently performed, and these processes are alternately performed by switching from one cylinder to the other to continuously supply dry gas; under predetermined conditions, for example, if the relationship between the dew point (dew point under pressure) Ta and a set dew point (dew point under pressure) Ts is Ta ≤ Ts in dried gas, the drying process is continued alternately between both cylinders, while a process for purging of desorbed moisture from each cylinder that is suspended is provided.

Description

526088 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the Invention (1) [Technical Field to which the Invention belongs]

The present invention relates to a dehumidification method and a device for dehumidifying and drying a wet compressed gas by using an adsorbent, and more particularly to an energy-saving operation to prevent early deterioration of the adsorbent. [Previous technology] In conventional dehumidifiers, two containers were filled with activated alumina, silica gel, synthetic zeolite, or chlorinated chloride for continuous supply of dry air. Sorbents for sorbents such as lithium chloride. Wet compressed air is introduced into one of the suction cylinders to be sucked and dried, and supplied to a designated supply place. At the same time, a part of the obtained dry air is introduced into the other suction tube, and the moisture is removed from the sorbent which absorbed moisture in the previous stage and the dehumidifying ability is reduced, and this moisture is removed from the suction tube. regeneration. 21% of the dry air obtained in this regeneration process will be released into the atmosphere. This type of drying of compressed air is performed on one suction tube, while the other suction tube is used to regenerate the adsorbent, and after a specified time has passed, the switching between the two suction tubes is switched. Open and close to supply dry air continuously. However, since the dehumidifier is designed based on the most severe summer conditions in which ambient temperature and intake air temperature rise, for example, use in winter or when the burden on the supply site is reduced, the absorption function of the adsorbent is reduced. I hope that the purpose of long life can be achieved. (Please read the precautions on the back before filling this page) Install!丨 Order. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) · 4-526088 A7 _ B7 V. Description of the invention (2) In the past, it was performed as energy-saving operation as shown in Figure 11. Even when the switching action of the switch is stopped, the exhaust valves connected to each suction cylinder will be closed. For example, as long as the wet compressed air is continuously introduced into the B cylinder, it will be dehumidified and dried. Both stop the regeneration operation. [Problems to be Solved by the Invention] During the energy-saving operation, the switching operation of the switch is stopped, and the exhaust valves of the suction cylinders are all closed, and the exhaust air reduces the amount of dry air. . However, due to conditions, the above energy-saving operation may continue for a long time. At this time, only the sorbent in one sorption tube performs the absorbing function, and the sorbent in the other sorption tube has no effect. Therefore, after returning to standard operation, the moisture content of the adsorbent that has been dehumidified and dried in the adsorption cartridge will not be balanced with the moisture adsorption amount of the adsorbent in the other adsorption cartridge that has no effect. . In fact, the dew point temperature of the dry air supplied from the party that has continued to dehumidify and dry is higher than the dew point temperature of the dry air supplied. As a result, the sorbent on the application side for a long period of time is deteriorated earlier than the sorbent on the other side, and it becomes necessary to replace the sorbent with a new one. When the sorbent on either side deteriorates, in general, both sides must be replaced at the same time, which will cause "unnecessary renewal for the other side", which will have a bad influence on the running cost. The purpose is to provide the two sides (please read the precautions on the back before filling this page) by suppressing the discharge of dry air by exhausting during energy-saving operation. Printed on the paper by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -5. Printed by the Employees’ Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 526088 Α7 Β7 V. Description of the invention ( 3) The degradation of the sorbent in the sorption tube can be carried out uniformly. When returning to the standard operation, it can suppress the fluctuation of the dew point temperature between the sorption tubes, so that the exchange time of each sorbent can be consistent and eliminated. Unnecessary exchange 'A method and device for dehumidifying compressed gas to achieve the effect of reducing operating costs. [Means for solving the problem] In order to solve the above-mentioned problems and achieve the object, the dehumidification method and device of the compressed gas of the present invention are constituted by the following. (1) Equipped with one of two sorbents filled with sorbent, a wet compressed gas is introduced into the drying process for adsorption and dehumidification, and a part of the dry gas obtained from the drying process is introduced into the previous stage. The other absorption tube, which reduces the moisture absorption capacity during the drying process, detaches the moisture from the sorbent, and discharges the separated moisture from the absorption tube for the regeneration process. The drying process and the regeneration process are absorbed in two ways. The dehumidification method of continuously supplying dry gas is alternately switched between the cylinders, which is characterized in that: under the specified conditions, the drying process can be stopped and the moisture can be stopped interactively while continuing between the two suction cylinders; The process of stopping the exhaust of each suction tube. (2) According to the dehumidification method of compressed gas (1) above, the above-specified conditions are the dew point temperature (dew point under pressure) of the dry gas obtained during the drying process, T a and the set dew point temperature (dew point under pressure).

Ts is equal or lower (TaSTs). (3) It is provided with two suction tubes filled with a sorbent, and a passage and an exhaust means for communicating the two suction tubes by a switching means, in which a wet compressed gas is introduced into one suction The tube is dehumidified and dried by suction. This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 7〇Z " — II ------- JAW — — — — — — — ^ «— — — — 1 — I a ^ _wi (Please read the notes on the back before filling this page) 526088 A7 B7 V. Description of the invention (4) Part of the dry gas is introduced in the previous stage to reduce the moisture absorption capacity. Party

I The suction tube removes moisture from the sorbent, and exhausts the detached moisture from the suction tube for regenerating by means of exhaust. Based on the switching action of the above switching means, The dehumidification device that alternately switches between drying and regeneration between the cylinders and continuously supplies dry gas is characterized by: the continued switching of the switching means under the specified conditions, on the one hand, the humidity is alternately continued between the two cylinders. The compressed gas is dehumidified and dried, and it has control means to control each suction tube to stop the exhausting means. Since the means shown in (1) to (3) are adopted, the so-called energy-saving operation starts under the specified conditions. At this time, the amount of exhaust gas is suppressed to a small amount, and the sorbent in the two cylinders is degraded. The operation is performed uniformly. When returning to the standard operation, the dew point temperature between the adsorption tubes can be suppressed, and the exchange time of each adsorbent can be the same. (4) In one of the two suction cylinders filled with the sorbent, a wet compressed gas is introduced for the drying process of adsorption and dehumidification, and a part of the dry gas obtained from the drying process is introduced in the previous stage. The drying process makes the hygroscopic ability reduce the other sorbent cylinders to detach the moisture from the sorbent, and the detached moisture is discharged by the sorbent for the regeneration process. These are switched alternately between the two sorption cylinders. In the dehumidification method in which the drying process and the regeneration process are performed so as to continuously supply the drying gas, it is characterized in that, while the regeneration process is stopped under the specified conditions, the regeneration process will be performed at the specified frequency during the stop process. t (5) The dehumidification method of compressed gas as described in (4) above, in which the regeneration process is stopped under the above-mentioned specified conditions, and the above-mentioned drying process is in accordance with the Chinese National Standard (CNS) A4 (210 X 297) (%) (Please read the notes on the back before filling this page) · 1111111-5J Xin-_ Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs's Consumer Cooperatives 526088 A7 B7 V. Description of the invention (5) The two suction cups are interactively Continue, or continue on only one suction tube. (Please read the precautions on the back before filling out this page) (6) There are two suction tubes filled with sorbent, and the way to connect these suction tubes by switching means and exhaust means, Among them, the wet compressed gas is introduced into one suction tube, sucked and dehumidified and dried, and a part of this dry gas is introduced into the other suction tube, which reduces the moisture absorption capacity in the previous stage, and the moisture is separated from the adsorbent. In addition, the exhausted moisture is exhausted from the suction tube by the exhaust means for regeneration. Based on the switching action of the switching means described above, the two suction tubes are alternately switched between drying and regeneration, and continuously supplied. The dry gas dehumidification device is characterized in that when the energy-saving operation of stopping the regeneration process is performed under specified conditions, it is provided with a control means to control the regeneration process at a specified period during the energy-saving operation ^ Economic Printed by the Ministry of Intellectual Property Bureau's Consumer Cooperative because it uses the means shown in (4) to (6) to stop the regeneration process under specified conditions, even if it is an energy-saving operation. Mandatory exhaust is performed for the two suction cylinders at a specified period, so the exhaust volume can be suppressed to a small amount while the deterioration of the adsorbent can be uniformly performed. When returning to the standard operation, it can be suppressed in each The dew point temperature between the suction tubes can make the exchange of each suction tube the same. [Embodiment of the invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 shows a perspective view of the appearance of a compressed gas dehumidifier. This dehumidifying device is printed by the stand 1 on the lower side, and the paper size installed on this stand 1 is in accordance with the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -8-Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 526088 A7 B7 V. Description of the invention (9) 3 3, and the halfway part of the communication path 33 from this port is connected to the exhaust branch path 34 of the above-mentioned exhaust valve 27. The exhaust valve 27 is a general electromagnetic on-off valve, and is electrically connected to the control circuit 25. In response to a control signal from this control circuit 25, a switching operation is performed to pass or block the exhaust gas introduced from the exhaust branch path 34. The exhaust gas system derived from here is silenced by being guided to the muffler 28, and then released to the outside. The control circuit 25 is provided with a circuit that receives a detection signal from the temperature sensor 23 and converts it into a dew point temperature (dew point under pressure) T a. This dew point temperature T a is stored with a preset dew point temperature (pressure). Lower dew point) T s comparison circuit, and a circuit for controlling the switching of the switching valve 26 and the opening and closing of the exhaust valve based on the result of this comparison. The adsorption device formed by the above structure performs the following functions. And, the compressed gas system is explained by compressed air. When the valve body f of the switching valve 26 is in the position shown in FIG. 2, the drying process is performed in the B cylinder 4, and the boosting process or the regeneration process is performed in the A cylinder 3. That is, the wet The compressed air is guided from the inlet 10 of the input joint 15 through the introduction path 30 to the third port c of the switching valve 2 6 and from the B cylinder communication path 32 to the B cylinder through the fourth port d. Within 4 When the wet compressed air passes from the lower part to the upper part in the B cylinder 4, it is dried because it is adsorbed and dehumidified by the adsorbent 17 filled therein. i IIIIII e illll · — — · < Please read the notes on the back before filling this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -12-Employees of Intellectual Property Bureau, Ministry of Economic Affairs Printed by the Consumer Cooperative 526088 A7 --B7 V. Description of Invention (1〇) The process was carried out. In addition, the check valve 1 8 B provided on the upper part is pushed and guided

I Discharge the supply path 20 of connector 5 and supply it from supply port 9 to the designated supply and delivery place. In addition, part of the dry air sent from the upper opening of the B cylinder 4 will be introduced into the exhaust chamber 22, and the flow rate will be reduced due to the exhaust hole 12. The exhaust chamber 22 at the upper part of the A cylinder 3 will be introduced into A Within tube 3. Then, by filling the sorbent 17 in the A cylinder 3, the moisture absorbed by the sorbent 17 during the previous stage of drying will be removed. The exhaust air after the moisture is removed is guided from the first port a through the second port through the A tube communication path 3 1 and is guided to the port communication path 33. Since the fifth port e is closed, the exhaust air is guided from the port communication path 3 3 to the exhaust branch path 34. When the exhaust valve 27 is closed, the exhaust air will be blocked here, so the pressure in the A cylinder 3 will rise and cause a boosting process. When the exhaust valve 27 is in the open state, the exhaust air will be guided to the muffler 28 through the exhaust valve 27, and after it is silenced, it will be released to the outside to form a regeneration process. When the valve body f of the switching valve 26 is in the position shown in Fig. 3, a drying process is formed in the A cylinder 3, and a boosting process or a regeneration process is formed in the B cylinder 4. That is, the wet compressed air supplied to the dehumidifier is introduced from the inlet 10 of the input connector 15 to the third port c of the switching valve 2 6 through the guide path 30 and through the second port b is guided into the A cylinder 3 from the A cylinder communication path 3 1. This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -13 · — —— — — — — — — — --IIIII — — — — — — — a ^ nwi (Please read first Note on the back, please fill in this page again) 526088 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (11) When the wet compressed air passes from the bottom to the top of the A tube, it is filled here. A drying process in which the sorbent 17 adsorbs, dehumidifies, and dries is performed. In addition, a check valve 18 A provided in this upper part is pushed and pushed, and the supply and delivery path 20 of the guide discharge connector 5 is supplied from the supply and supply port 9 to the designated supply and output place. In addition, a part of the dry air sent from the opening at the upper end of the A cylinder is introduced into the exhaust chamber 22 and the flow rate is reduced due to the exhaust hole 12. The exhaust chamber 22 at the upper part of the B cylinder 4 is introduced into the B cylinder 4 within. This dry air will pass through the sorbent 17 filled in the B cylinder 4, and the moisture absorbed by the absorbent 17 during the previous stage of the drying process will be removed. The exhaust air after the moisture is removed is guided from the B-tube communication path 3 2 through the fourth port d from the fifth port e, and the guide port communication path 3 3 〇 because the first port Since the port system is closed, the exhaust air is guided from the port communication path 33 to the exhaust branch path 34. When the exhaust valve 27 is in the closed state, the exhaust air will be blocked in this package, so the pressure in the B cylinder 4 will rise to form a boosting process. When the exhaust valve 27 is in the open state, the exhaust air will be guided to the muffler 28 through the exhaust valve 27, and after it is silenced, it is released to the outside to form a regeneration process. Next, as shown in Figs. 4 (A) to (D), the switching surfaces of the flow path structure of the dehumidification function described above will be sequentially explained. Fig. 4 (A) shows that the wet compressed air is guided to the B cylinder 4 through the switching valves 2, 6 and is sucked and dried by the adsorbent 17 filled therein. The dried compressed air will be supplied to the supply and delivery point through the check valve 18 B. — — — — — — — — — — — — Aw · IIIIIII ^ · 1111111 · (Please read the notes on the back before filling out this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -14-526088 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the Invention (12) In addition, a part of the dry air discharged from the B tube 4 will be guided to the A tube 3 through the exhaust 1 hole 12 but Since the exhaust valve 27 'is closed, the pressure in the cylinder 3 will be increased to the operating pressure. That is, the drying process is formed in the B cylinder 4 and the pressure increasing process is formed in the A cylinder 3. In FIG. 4 (B), the switching valve 26 is switched and the exhaust valve 27 is opened to open. The wet compressed air will be directed to the A cylinder 3 through the switching valve 2 6, and it will be sucked and dried by the adsorbent 17. The dried compressed air will be supplied through the check valve 18 A. In addition, a part of the dry air supplied from the A cylinder 3 is guided to the B cylinder 4 through the exhaust hole 12 to remove moisture from the sorbent. This exhaust air will pass through the open exhaust valve 27, and the guide muffler 28 will be discharged from this package to the outside. That is, the drying process is performed in the A cylinder 3, and the regeneration process is performed in the B cylinder 4. In Fig. 4 (C), the exhaust valve 27 is closed when the switching valve 26 is maintained in its original state. Therefore, in the A cylinder 3, the drying process will be continuously performed, and in the B cylinder 4, the pressure increasing process to the operating pressure will be performed. In Fig. 4 (D), the switching valve 26 is switched, and the exhaust gas closed 27 is opened. The wet compressed air is guided to the B cylinder 4 through the switching valve 26, and after the regeneration, the adsorption drying process is performed by the adsorbent 17. The dried compressed air is supplied through a check valve 18 B. In addition, a part of the dry air discharged from the B cylinder 4 will be guided to the A cylinder 3 through the exhaust hole 12 to form exhaust air for removing moisture from the sorbent. This paper applies the Chinese National Standard (CNS) A4 Specifications (210 X 297 mm) -15-— — — — — — — — — — ^ — — — — — — ^ »— — — 1 — (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 526088 A7 ____ B7 V. Description of the invention (13) 'Exhaust valve 2 7 is discharged from the muffler 2 8 to the outside. That is

I 'performs the drying process in the B cylinder 4 and the regeneration process in the A cylinder 3. After that, switch to the state shown in Figure 4 (A) and repeat the above 4 processes in sequence. In standard operation, the control shown in Figure 6 will be formed. Even if the above-mentioned control circuit 25 and 5 control the switching valve in minute intervals, the switching between the drying process of the absorption and dehumidification of the A cylinder 3 and the drying process 3 of the absorption and dehumidification of the B cylinder 4 is about two intervals. Minutes are carried out. In addition, the control circuit 25 is performed almost in accordance with the time when the switching valve exhaust valve 27 is opened, and is controlled so that each time the exhaust valve 27 is closed, the switching valve 26 is switched to the previous state. Of the state. For example, since the drying process of suction and dehumidification is performed in the A cylinder 3, the control exhaust valve 27 is opened after switching the switching valve 26 for a few seconds, and the pressure fluctuation at the start of the regeneration exhaust of the B cylinder 4 is controlled. The above-mentioned exhaust valve 27 is only set to open for 90 seconds, and in between, the B cylinder 4 will continue the regeneration process. Moreover, when about 90 seconds after the dehumidification and drying of the A cylinder 3 starts, the exhaust valve will be closed, so the pressure increasing process will be performed in the B cylinder 4. After the pressure increasing process of the B cylinder 4 will continue for about 30 seconds, after a total of about 120 seconds (2 minutes), the switching valve 26 will switch to the B cylinder 4 for the drying process of adsorption and dehumidification for about 120 seconds (2 minute). After a few seconds from this switching, the exhaust valve 27 is controlled to open. After the A cylinder 3 continues the regeneration process for about 90 seconds, the exhaust valve 27 will be closed for about 30 seconds. It becomes a boost process. This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) -16 · — — — — — — — — — JAW- · 1111111 ^ · 11111111 (Please read the precautions on the back before filling in this Page) 526088 A7 B7 printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (14) As a result, after about 120 seconds (2 minutes), it was sucked on the side of A tube 3 as described previously. The drying process of dehumidification and the 4 side of the B cylinder become a regeneration and boosting process, and the cycle is repeated as follows. The above-mentioned temperature sensor 2 3 detects the temperature of the compressed air after absorption, dehumidification and drying, and transmits the detection signal to the control circuit 25, where the dew point temperature (dew point under pressure) T a is calculated, and the result is induced by the output force. Voltage to output. -For example, the amount of air required from supply port 9 to the supply site is extremely reduced, and the load is small, or the temperature of the compressed air introduced from the inlet 10 is very low. In addition, dry conditions will move to energy-saving operation. Actually, the flow chart shown in Figure 5 is used as a basis. Compared with the standard full-flow operation, when the flow is low, it will switch to energy-saving operation. That is, from the beginning to the stage S1, the standard operation will be started. Moving from this standard operation to stage S 2, the temperature sensor 23 will detect the temperature of the supplied dry air ^ In stage 3, the control circuit 25 receiving the detection signal sent from the temperature sensor will convert it into the dew point temperature (Dew point under pressure) Ta. Next, at stage S4, the control circuit will compare the set dew point temperature (dew point under pressure) T s, which is recorded in advance, to the calculated dew point temperature T a. When the calculated dew point temperature T a is lower than the set dew point temperature T s or equal, (Ta < Ts) ′ will form Yes and move to stage S 5, and the energy-saving operation to be described later will begin. In addition, 'when the calculated dew point temperature T a is higher than the set dew point temperature T s', it will become N 〇 This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 male f -17- " III I- ------------- — — — — — — — (Please read the notes on the back before filling out this page) 526088 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs B7 V. Invention Description ( 15) Return to the standard operation of stage S1.

I Figure 7 shows the first example of control for energy saving operation. Set the dew point T s in the control circuit 25 in advance. For example, the dew point under pressure is 40 ° C. When the calculated dew point temperature T a is equal to or lower than the set dew point temperature T s, energy-saving operation The start signal will be sent. The switching valves 2 and 8 switch the dehumidification and drying of the A cylinder 3 and the dehumidification and drying of the B cylinder 4 as described above. In addition, for the A cylinder 3, when the dehumidification and drying are switched, the exhaust valve 27 is opened at almost the same time to regenerate the exhaust of the B cylinder 4, and then the exhaust valve 27 is closed to increase the pressure. After two minutes, the B cylinder 4 was switched to dehumidification and drying for almost the time required to regenerate and exhaust the A cylinder 3, and then pressurize. When the load is very small, or the temperature of the compressed air is very low, the dew point temperature will drop from-40 ° C to -45 ° C. Also, although the switching of the switching valve 26 is controlled to continue for two minutes, the exhaust valve is kept closed. Therefore, the A and B cylinders 3 and 4 will have almost equal wet compressed gas to be introduced into the sorbents 17 in each of the cylinders 3 and 4, and they will perform equal suction functions. In this way, the dryness of the dry air supplied will not change and will remain constant. Because the exhaust valve 27 is closed, and because the moisture is not removed from the sorbent 17, the dew point temperature T a will gradually rise again from a temperature of 45 ° C. In this way, the switching of the switching valve 26 is performed at a designated cycle (for example, 3 cycles: 12 minutes), and the exhaust valve 27 is opened. The opening of this exhaust valve 2 7 means that one of the switching valves 2 6 is used. The paper size applies the Chinese National Standard (CNS) A4 (210 x 297 mm) -18--------- --- ^ — I—I—11 (Please read the precautions on the back before filling in the $ page) 526088 A7 _ B7 V. Description of the invention (16) (Please read the precautions on the back before filling in this page) Cycle. That is, when the dehumidification and drying of the A cylinder 3 is switched, the regenerative exhaust will be performed in the B cylinder 4 at almost the matching time, and when the dehumidification and drying of the B cylinder 4 is switched, the regenerative exhaust will be performed in the A cylinder 3 at almost the matching time. However, due to the repeated operation of dehumidification and drying during energy-saving operation, the moisture stored in the barrels 3 and 4 of A and B will be exhausted, and the absorption of the sorbent 17 will have a certain degree of response. After that, the control of the switching valve 2 6 ″ is continued as described above, and the exhaust valve is closed in the specified period. Because switching to energy-saving operation like this, the exhaust volume will be reduced and the energy loss will be reduced. In addition, since each of the tubes 3 and 4 is performed at a fixed period, the deterioration of the sorbent 17 can be minimized. · When the load returns to its original state, or the temperature of the compressed air introduced again rises, because the calculated dew point temperature is higher than the set dew point temperature T s, the control circuit 25 will re-control back to the previous description Full flow standard operation. '' Even if the consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints it back to standard operation, in the energy-saving operation, the dehumidification and drying of the A and B cylinders 3 and 4 have continued to be uniform, so the drying obtained from the dehumidification and drying process between each other There is almost no dew point change in the air. In addition, during the energy-saving operation, the degradation of the sorbent 17 of the barrels 3 and 4 of A and B is uniformly performed. Therefore, if it is necessary to replace, the adsorption of the barrels 3 and 4 of A and B can be replaced at the same time. Agent. The above is that when the load is very small, only a small amount of compressed air after dehumidification and drying can be supplied to enable energy-saving operation. However, the following explains the difference between this low-flow energy-saving operation and the full-flow operation previously described. Paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm)-怊 _ 526088 Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 5. Invention Description (17), the so-called energy saving in medium flow Operational. 1 As shown in the eighth figure, the switching valve 2 6 is switched every 2 minutes, and the dehumidification and drying process is continued in the barrels 3 and 4 of A and B. On the one hand, when it is judged that the calculated dew point temperature T a is equal to or lower than the set dew point temperature T s, it enters an energy-saving operation. That is, in conjunction with the dehumidification and drying switching of the A cylinder 3, the exhaust valve 27 will close at the same time, and the regeneration exhaust of the B cylinder 4 will be interrupted. However, the load is so large that the dew point temperature T a becomes higher than the set dew point temperature T s because the regeneration exhaust gas is interrupted. There, in accordance with the dehumidification and drying switching of the B cylinder 4, the exhaust valve 27 will be opened at almost the same time, and the A cylinder 3 will be regenerated and exhausted. -Because the dew point temperature T a becomes lower than the set dew point temperature again, for the dehumidification switching of the A cylinder 3, the exhaust valve 27 is closed at the same time, and the regeneration exhaust of the B cylinder 4 is interrupted. In the following, the energy-saving operation of the medium flow rate is performed in the four cycles of dehumidification and drying of the A and B barrels 3 and 4 of the switching valve 26. When the dew point temperature T a is higher than the set dew point temperature T s, the The exhaust valve 27 is opened, and regenerative exhaust is performed in the corresponding cylinders 3 and 4. Therefore, it is possible to control the dew point temperature and the like when returning to the standard operation as much as possible. In addition, although it is not particularly shown in the figure, depending on the conditions, it can also be carried out in different levels in a low-flow energy operation. That is, the low-flow and energy-saving operation that has been described previously, for the four and four cycles of the dehumidification and drying of the A and B barrels 3 and 4 of the switching valve 26 ---------- ^- — — — — — I— ^-— — — — — — 1— (Please read the notes on the reverse side before filling out this page) This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)- 20-526088 A7 ---- B7 V. Description of the invention (18) The exhaust valve 2 7 is opened, but it is not limited to this. t (Please read the precautions on the back before filling in this page) When the set dew point temperature T s recorded beforehand reaches 100%, for example, the dew point under pressure-60 ° C or-8 Ot: as the reference, the switching valve 2 6 The dehumidification and drying is switched to opening the exhaust valve 27 every 6 cycles or 8 cycles, and energy-saving operation with less flow is required. Fig. 9 'shows a second example of the control of the energy-saving operation, and the start signal of the energy-saving operation is transmitted in the same manner as the above-mentioned current situation. The switching valves 2 and 8 switch between the dehumidification and drying of the A cylinder 3 and the dehumidification and drying of the B cylinder 4 as described above. In addition, the dehumidification switching for the A cylinder 3 is almost matched with opening the exhaust valve 27 at the same time, and the B cylinder 4 is regenerated and exhausted, and the exhaust valve 27 is closed to increase the pressure. After 2 minutes, in conjunction with the dehumidification switch of the B tube 4, the A tube 3 is regenerated and exhausted at about the same time, and then boosted. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. When the load becomes small or the temperature of the compressed air introduced is very low, the dew point temperature will drop from-40 ° C to -45 ° C. Next, although the control switching for the switching valve 26 continues below the interval of 2 minutes, the exhaust valve is kept closed. Therefore, compressed air is introduced into the A and B cylinders 3 and 4 almost evenly, and the sorbents 17 in the cylinders 3 and 4 perform equal suction functions with each other. Therefore, the dryness of the supplied dry air will not change and remain constant. Because the exhaust valve 27 is closed, the moisture removed from the sorbent 17 will not be removed, so the dew temperature T a will gradually rise again from 45 ° C. In this way, the switching of the switching valves 26 is performed at a specified cycle (for example, 3 cycles:

1 2 points), the exhaust valve 2 7 will be controlled at the next A. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm). 21 Employees ’Cooperatives, Intellectual Property Bureau, Ministry of Economic Affairs Print 526088 A7 __ B7 V. Description of the invention (19), B rain tube 3, 4 is switched in a cycle of dehumidification and drying.

That is, based on the start of the switching cycle of the switching valve 26, the exhaust valve 27 will be controlled in the fourth cycle. Specifically, with the switching of the dehumidification and drying of the A cylinder 3, the B cylinder 4 will be regenerated and exhausted at about the same time, and with the switching of the dehumidification and drying of the B cylinder 4, the A cylinder 3 will be regenerated and exhausted at about the same time. . Therefore, in the repeated operation of dehumidification and drying during energy-saving operation, the moisture accumulated in the barrels 3 and 4 of A and B will be forcibly removed, and the adsorption of the sorbent 17 will be restored to a certain level. After that, control such as the switching of the control switching valve 26 and the control of the exhaust valve 27 every 4 cycles are continued. The above-mentioned mode will not be changed during the continuous energy saving and source operation. Reducing the amount of exhaust gas will reduce energy loss and perform so-called energy-saving operations. In addition, the sorbent in each cylinder 3 and 4 is forcedly vented in a specified period, so the degradation of the sorbent 17 can be suppressed to a minimum. When the load returns to the original state, or the compressed air is introduced When the temperature rises again, since the calculated dew point temperature becomes higher than the set dew point temperature, the control circuit 25 will return to the standard operation of the full flow rate previously explained. Even when returning to standard operation, in the energy-saving operation, for the release agents 17 of the barrels 3 and 4 of A and B, the removed moisture is forcibly discharged evenly, and the regeneration process is performed, so the dry air obtained The dew point has hardly changed. In addition, in the energy-saving operation of the sorbents in the A and B cylinders 3 and 4, the paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 22- 'I--I JAW · 1111111 ^ -1111111 (Please read the notes on the back before filling out this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Employee Consumption Cooperative, 526088 A7 _ B7 V. Description of the invention (20) The degradation of 7 will be carried out evenly, as there are exchanges If necessary, it is only necessary to exchange the sorbents 17 of the barrels 3 and 4 of A and B at the same time. In addition, in the energy-saving operation of stopping the regeneration process described previously, 'Although the exhaust valve 17 is controlled to be opened to a cycle of dehumidification and drying switching for each of A, B barrels 3, 4 of 4 switching valves 26, But it is not limited to this. Figure 10 (A) (B) shows the third example of energy-saving operation control. As shown in Fig. 10 (A), it is also possible to control the exhaust valve 27 to open every five dehumidification and drying switching cycles. The number of cycles is determined to correspond to, for example, the dew point caused by absorption of dry air. Various conditions such as load were changed to make appropriate changes. In addition, in energy-saving operation, there is no limitation on dehumidifying and drying switching for the A, B cylinders 3, 4 of the switching valve 26. For example, as shown in FIG. 10 (B), when the exhaust valve 27 is closed to stop the regeneration process, the switching valve 26 can also be switched from the A cylinder 3 to the B cylinder 4 for energy-saving operation. However, even in this state, it is necessary to control the exhaust valve 2 7 to be opened at a designated period so that the sorbent 17 for each of the cylinders 3 and 4 is uniformly and compulsorily exhausted. [Effects of the invention] According to the inventions described in claims 1 to 3 of the scope of the patent application, during the so-called energy-saving operation, on the one hand, the dehumidification and drying are continued on the two suction cylinders. This paper applies the Chinese national standard (CNS) ) A4 size (210 X 297 mm) · 23 · ---------- ^ 丨 1 · Packing -------- Order --- (Please read the notes on the back before filling (This page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Employee Consumer Cooperatives. 526088 A7 B7 V. Switching of the description of invention (21), because the regenerative exhaust in each cylinder is stopped, and the drying is inhibited by the exhaust.

I At the same time as the amount of air is discharged, the degradation of the sorbent in the two sorption cartridges will progress uniformly, and the fluctuation in the dew point temperature between the sorption cartridges will be suppressed when returning to standard operation. The sorbent exchange time of the suction tube will be the same. Eliminating unnecessary exchange will reduce the cost of operation. ^ According to the inventions described in the fourth to sixth aspects of the patent application scope, in the so-called energy-saving operation, because Forcibly evacuate the sorbent of each sorbent cartridge at a specified period, so the amount of dry air is kept at a small amount by exhausting, and the degradation of the sorbent of the two sorbent cartridges is evenly performed. When the return to standard operation is suppressed, the change in the dew point temperature between the suction tubes improves the reliability. At the same time, the exchange time of the sorbents of the two suction tubes will be the same, eliminating unnecessary exchanges to achieve the drop operation. The effect of cost. [Brief Description of the Drawings] FIG. 1 is a perspective view showing an external appearance of a dehumidifying device according to an embodiment of the present invention. Fig. 2 is a schematic sectional view of a dehumidifier of the same embodiment. Fig. 3 is a schematic cross-sectional view of the dehumidifier according to the same embodiment, and Fig. 3 is a diagram of a different process from Fig. 2. Figures 4 to 4 show the switching sequence of the flow path constituting the dehumidification function in the same embodiment. Fig. 5 is the same flowchart of switching from standard operation to energy-saving operation in the embodiment. This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 mm) -24---- — — — — — — — — — — — — — 11111111 (Please read the note on the back first Please fill in this page again for the matters) 526088 A7 B7 V. Description of the invention (22) Figure 6 is the same as the control explanatory diagram of the standard operation of the embodiment. Fig. 7 is a diagram illustrating a first example of control during energy-saving operation at a low flow rate in the same embodiment. Fig. 8 illustrates the control during the energy-saving operation during the flow rate in the embodiment. Fig. 9 is a diagram illustrating a second example of the control during the energy-saving operation when the flow rate is small in the embodiment. Fig. 10 A and B are explanatory diagrams of a third example of control during energy-saving operation at a low flow rate in the same embodiment. Fig. 11 is an explanatory diagram of control during conventional energy-saving operation. [Illustration of drawing number] (Please read the notes on the back before filling this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 3 Suction tube (A tube) 4 Suction tube (B tube) 1 7 Suction agent 2 3 Temperature sensor 2 5 Control circuit (control means) 2 6 Switching valve (switching means) 2 7 Exhaust means (exhaust valve) 3 0 Introduction path 3 1 A tube communication path 3 2 B tube communication path 3 3 Port Communication path 3 4 Exhaust divergence path This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) -25-

Claims (1)

526088 A8 B8 C8 D8 VI. Application for Patent Scope No. 89 1 105 1 No. 1 Patent Application in Chinese Revised Patent Scope (Please read the precautions on the back before filling out this page) Amended in May 91 of the Republic of China1. A compressed gas The dehumidification method is to introduce wet compressed gas into one of two sorption cylinders filled with sorbent, perform a drying process of adsorption and dehumidification, and introduce a part of the dry gas obtained by the drying process. The drying process in the previous stage reduces the moisture absorption capacity of the other suction tube, and the moisture is removed from the adsorbent, and the regeneration process of removing the removed moisture from the suction tube is performed simultaneously, and in the This dehumidification method that alternately switches the drying process and the regeneration process between the two suction cylinders so as to continuously supply the compressed gas of the drying gas is characterized in that it is provided with one side between the two suction cylinders under the predetermined conditions. While the drying process is continued alternately, the stopping process of the discharged moisture from each suction cylinder is stopped. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs2. If the compressed gas dehumidification method of item 1 of the scope of patent application, the above-mentioned conditions are the dew point temperature (pressure dew point) of the dry gas obtained during the drying process. Set dew point temperature (dew point under pressure) Ts is equal or lower (TaSTs). 3. A type of compressed gas dehumidification device, which is two suction tubes filled with an adsorbent, and a communication path that connects the suction tubes with a switching means and an exhaust means, in which the wet compressed gas is introduced One suction tube absorbs moisture and dries, and then introduces a part of this dry gas into the other suction tube to remove moisture from the sorbent that has reduced the moisture absorption capacity in the previous stage, and exhausts it by means of exhaust. The removed moisture is removed from the suction tube and reprocessed at the same time: Regeneration, the paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm)-526088 A8 B8 C8 D8 VI. Application for patent scope (please read the back first (Notes for filling in this page, please fill in this page) Based on the above-mentioned switching method, the drying and regeneration are alternately switched between the two suction cylinders, so that it can continuously supply dry gas. It is characterized by: On the one hand, the switching of the switching means is continued, so that the wet compressed gas is continuously dehumidified and dried alternately between the two suction cylinders, and the control means for stopping the exhaust means for each suction cylinder is controlled. 4 · A method for dehumidifying compressed gas, in which one of the two suction cylinders filled with an adsorbent is introduced with a wet compressed gas for adsorption and dehumidification drying process, and a part of the drying gas obtained by the drying process is introduced In the previous stage of the drying process, the other suction tube that reduced the moisture absorption capacity removes moisture from the sorbent, and removes the removed moisture from the suction tube while performing a regeneration process. These drying processes are related to The regeneration process is alternately switched between the two suction cylinders so that it can continuously supply dry gas. It is characterized by having the energy-saving operation of stopping the regeneration process under predetermined conditions, and in the energy-saving operation with the predetermined Cycle to carry out the regeneration process. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. If the compressed gas dehumidification method of item 4 of the patent application scope, in the above energy-saving operation, the above-mentioned drying process is continued between the two suction cups interactively, or Only continue to suck the tube on one side. 6. A kind of compressed gas dehumidification device, 2 suction tubes filled with sorbent, and the communication path that connects these suction tubes by switching means and exhaust means to introduce wet compressed gas to one side The suction tube is made to absorb and dehumidify and dry, and a part of this dry gas is introduced into the other suction tube to remove the moisture from the absorbing agent that has reduced the moisture absorption capacity in the previous stage, and by exhausting Removal of the removed moisture from the suction tube at the same time by air means. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) 526088 A8 B8 C8 D8 々, the scope of patent application and the above switching means The switching is used as a reference, and the drying and regeneration are alternately switched between the two suction cylinders so that the dry gas can be continuously supplied. It is characterized by having the above-mentioned regeneration process stopped under a predetermined condition and operated in a ken-g source. At the same time, control means to perform the regeneration process at a predetermined cycle in the energy-saving operation of the province. -------- · Installation-- (Please read the precautions on the back before filling out this page) Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Employee Consumer Cooperatives This paper is sized to the Chinese National Standard (CNS) A4 (210X 297) Mm)