KR20030022485A - Method and apparatus for blower regenerating non-purge absorption air drier - Google Patents

Abstract

PURPOSE: A regeneration method of adsorbing air drier of exterior air suction regenerating type and equipment thereof are provided, which can regenerate air drier by circulating exterior air and internal air so that any loss of compressed air may be prevented thus maximizing production capacity of compressed air and energy. CONSTITUTION: The regeneration method comprises a first step of sucking exterior air and heating, and feeding the heated air to the dry towers(21,22) filled with moisture absorbent for heating the dry towers(21,22); a second step of evaporating moisture in the dry towers(21,22) by heating the tower and exhausting the evaporated moisture to outdoor; and a third step of circulating cooled internal air for cooling the heated dry towers(21,22).

Description

Regeneration method and apparatus for external air suction regenerative adsorption air dryer {Method and apparatus for blower regenerating non-purge absorption air drier}

The present invention relates to a method and apparatus for regenerating an external air suction regenerative adsorption air dryer, in which regeneration of a drying tower of an air dryer is performed by circulation of outside air and internal air so that loss of compressed air does not occur. The increase in production cost due to the loss of compressed air used for cooling is eliminated, the load of the air compressor is kept constant, and it can be used from low pressure air to high pressure air to minimize the loss of energy and maximize the production capacity of compressed air. It relates to a method and apparatus for regenerating an air dryer.

In general, the adsorption-type air dryer compresses air and inhales the saturated water vapor through the air compressor to compress the air, and then cools the compressed air with a cooler to remove moisture condensed first.

Refers to a device that removes moisture of wet air containing saturated steam that is not condensed by adsorption of a desiccant,

It uses two identical drying towers each containing a drying agent, one drying tower carries out the drying process while passing the compressed air through the inside drying agent, while the other drying tower is a part of the drying air from the drying process. Regeneration process is performed while passing through the drying agent inside the drying tower.

As a result, the two drying towers convert the drying process and the regeneration process at regular intervals to produce dried compressed air continuously.

As a conventional embodiment of the air dryer, looking at the air dryer shown in Figure 5 in detail,

A pair of drying towers 101 and 102 filled with a desiccant in the air dryer 100 is provided, and a compressed air inlet pipe 103 is connected to the lower side of the drying towers 101 and 102, and Dry air discharge pipe 104 is connected to the upper side, the outside air is sucked by the blower 105 and heated by the heater 106, and then sent to the drying tower (101) (102) to the drying tower (101, 102) Heating the drying tower 101 (102) by cooling the drying tower 101 (102) by moving a part of the produced dry air to the drying tower (101) (102) through a cooling air engine (107). 102 is configured to be reproduced.

In the regeneration process of the drying tower as described above, by using a part of the compressed air produced by the air dryer during cooling and regeneration, there is a problem that the loss of the produced compressed air occurs.

In addition, the loss of the dry air, there is a problem that the production cost of the dry air itself increases.

In addition, the loss of dry air has a problem of reducing the efficiency of energy while reducing the production efficiency of dry air.

In addition, due to the use of dry air, the load change of the air compressor used in the air dryer is very large, which causes the failure of the air compressor and causes inconveniences in operation and use. There is a problem that the disruption occurs.

In addition, by using a part of the compressed dry air, there is a problem that can be applied to a high pressure air dryer, but not applicable to a low pressure air dryer.

Accordingly, there is a problem that the utilization range or use range of the air dryer is reduced and the production cost of the dry air is increased.

Accordingly, the present invention has been made to solve the conventional problems as described above,

The purpose is to suck and heat the outside air and to heat the drying tower to the heated outside, to discharge the evaporated water from the drying tower, and to cool the circulation of the internal air on the drying tower and regeneration pipeline after the water discharge is completed. It is provided with a step, to provide a regeneration method of the air intake regenerative adsorption air dryer in which the drying tower is regenerated by purifying the outside air and the internal air without losing the compressed air discharged from the air dryer.

In addition, an object of the present invention is composed of a switching valve, a cooler, a heater, a blower to regenerate the drying tower of the air dryer by the circulation of external air and internal air, so that the outside air and the inside without loss of compressed air discharged from the air dryer The present invention provides a regeneration device of an outside air suction regeneration adsorption air dryer in which a drying tower is regenerated by air circulation.

In addition, the object of the present invention is provided with a pressure reducing pipe between the first switching valve and the outdoor air discharge pipe, so that the pressure inside the drying tower is gradually reduced before the drying tower is heated by heated outside air It is to provide a regeneration device of the adsorption air dryer.

In addition, an object of the present invention is to provide a regeneration apparatus of an external air suction regenerative adsorption air dryer to remove the condensate generated by the operation of the cooler when the internal air is circulated by providing a condensate separator on one side of the cooler.

In addition, an object of the present invention is provided with a shut-off valve in the inlet and outlet pipes of the heating and cooling air connected to the drying tower, the low-pressure section and the high-pressure section is separated and the safety of operation is secured, a pair of drying tower is drying and regeneration The present invention provides a regeneration apparatus of an external air suction regenerative adsorption air dryer which achieves a uniform pressure state with each other when exchanging processes.

In order to achieve the above object, the present invention comprises a first step of heating the inside of the drying tower by inhaling and heating the outside air, injecting the heated external air into the drying tower; A second step of evaporating the water inside the drying tower by the heating of the first step and discharging the evaporated water to the outside; Comprising a third step of cooling the heated drying tower after the second step of discharging water,

It is provided between the drying tower and the compressed air inlet pipe, one side is provided with an external air discharge pipe, the other side is provided with a compressed air inlet pipe to alternately connect the compressed air inlet pipe and the outdoor air discharge pipe to the drying tower. A first switching valve; A second switching valve provided at the other end of the outside air discharge pipe, one side of which is connected to an outside air discharge pipe, and an outside air suction pipe being connected to the outside air discharge pipe and the outside air suction pipe alternately; A cooler connected to one side of the second switching valve by a pipe so as to correspond to the outside air discharge pipe; A heater connected to the cooler by a pipe, the other end of which is connected to the drying air discharge pipe on the upper side of the drying tower by a pipe; Consists of a blower provided between the second switching valve and the heater,

The first switching valve is provided with a pressure reducing pipe between the air discharge pipe of the lower side, the cooler is provided with a condensate separator in the pipe of one side, the first opening and closing in the pipe connecting the heater and the drying tower A valve is provided, and a pipe having a second open / close valve is connected between the pipe between the first open / close valve and the drying tower and the dry air discharge pipe, and the third open / close valve is provided in the outside air discharge pipe. It is characterized by.

1 is a block diagram showing a dry tower regeneration method according to the present invention;

2 is a process chart showing a dry tower regeneration method according to the present invention;

3 is an overall configuration diagram of an air dryer according to the present invention;

4 is a configuration diagram showing a regeneration unit of the air dryer according to the present invention;

5 is a configuration diagram showing a conventional air dryer.

* Explanation of symbols for the main parts of the drawings

1: air dryer

10: inlet

11: air compressor 12: cooler 13: wet air storage tank

14: first filter 15: compressed air inlet pipe

20: drying part

21: 1st drying tower 22: 2nd drying tower

30: playback unit

31: first switching valve

311: outside air discharge pipe 312: pressure reducing pipe

32: second switching valve

321: outside air suction pipe 322: outside air suction filter

33: cooler

331: condensate separator

34: heater 35: blower 36: first opening and closing valve

37: second opening and closing valve 38: third opening and closing valve

40: dry air dry air discharge unit

41: dry air discharge pipe 42: second filter

50: control unit

51: control box

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention.

Looking at the block diagram showing the regeneration method of the air dryer according to the invention as shown in Figure 1,

In the regeneration of the air dryer, a first step (S1) of sucking and heating external air, injecting the heated external air into a drying tower to heat the inside of the drying tower,

A second step (S2) of evaporating the water inside the drying tower by the heating of the first step (S1) and discharging the evaporated water to the outside;

After discharging the water of the second step (S2) is finished, it is composed of a third step (S3) for cooling the heated drying tower by operating a cooler.

After discharging the moisture in the first step (S1) and the second step (S2), in the third step (S3), the external discharge pipe is blocked and the air in the internal pipe is cooled by internal circulation to cool the internal air. It is injected into a drying tower to be cooled.

Looking at the process diagram showing the regeneration method of the air dryer according to the invention as shown in Figure 2,

In order to regenerate the drying tower of the air dryer, the outside air is sucked in (S10) and then the outside air is heated by the operation of the heater (S11) to move to the inside of the drying tower, and the drying tower is heated (S12) to evaporate moisture. By heating, the heating step S1 is finished.

By discharging the water evaporated as described above to the outside of the drying tower (S20) is the discharge step (S2) is finished.

After the discharge (S2) is finished, the air inside the conduit is circulated (S30) in a state in which the inflow of external air is blocked, and the cooler is operated (S31) in the state where the internal air is circulated (S30). By cooling and circulating the cooled internal air to be transferred to the interior of the drying tower, cooling of the drying tower is performed (S32), thereby completing the regeneration of the drying tower as the cooling step (S3) is completed.

As described above, after the regeneration is completed by heating (S1), discharge (S2), and cooling (S3) of the drying tower, a replacement step (S4) of the drying tower is made.

First, the two drying towers are equalized to each other by opening and closing the appropriate pipe (S40), then the drying tower is replaced (S41), and the regeneration process of the replaced drying tower is started again, and the heated outside air is In order to reduce the pressure (S42) of the drying tower to be added (S10).

As described above, the replacement of the drying tower (S4) is made and the pressure reduction of the drying tower (S40) is made, and the first step of suction (S10) of the outside air is started, and all the processes are repeated and made continuously. .

The drying tower is alternately regenerated by the regeneration process of the continuous air dryer as described above, and the dried compressed air is continuously produced.

Looking at the overall configuration of the air dryer according to the invention as shown in Figure 3,

The air dryer 1 includes an inlet 10 for compressing outside air and introducing the same into the inside, a drying unit 20 for drying the compressed air introduced from the inlet 10, and the drying unit 20. A regeneration unit 30 for regenerating the drying towers 21 and 22 used in the drying process of the compressed air, and a dry air discharge unit 40 for discharging the dried compressed air discharged from the drying unit 20; The control unit 50 controls the inlet 10, the drying unit 20, the regeneration unit 30, and the dry air discharge unit 40 to achieve a smooth operation.

The inlet 10 is an air compressor (11) for sucking compressed air to make compressed air, a cooler (12) for cooling the compressed air, a wet air storage tank (13) for storing the cooled compressed air, The first filter 14 to filter the condensed water and foreign matter introduced when the compressed air is introduced, and the compressed air inlet pipe 15 for introducing the compressed air into the drying tower (21, 22).

Here, the cooler 13 serves to cool the compressed air that has become a high temperature by the heat of compression generated when the external air is compressed.

In addition, the drying unit 20 is provided with a first drying tower 21 and a second drying tower 22 into which compressed air is introduced by the compressed air inlet pipe 15, and the first drying tower 21. ) Performs the drying process of the compressed air, the second drying tower 22 performs the regeneration process, and the regeneration complete drying tower (21) (22) is exchanged again to perform the drying process by the alternating It is to carry out continuous drying of compressed air.

Here, the drying process of the drying tower (21, 22) is performed to remove the saturated steam that is not completely filtered by the first filter (14).

In addition, the regeneration unit 30 is a first switch valve 31 is provided with an external air discharge pipe 311 and the pressure reducing pipe 312, the second air suction pipe 321 and the second air suction filter 322 is provided. A switching valve 32, a cooler 33 having a condensate separator 331, a heater 34 for heating the sucked outside air, a blower 35 for sucking the outside air and circulating therein, and It is composed of opening and closing valves 36, 37, 38 to achieve a uniform pressure of the drying tower (21, 22).

Here, the first switching valve 31 is connected to the compressed air inlet pipe 15 on the side of the drying tower 21, 22 to perform the drying process, and the outside air discharge pipe on the side to perform the regeneration process ( 311).

In addition, the second switching valve 32 has one end of the outside air discharge pipe 311 is discharged to the outside air, the other side is provided with an outside air suction pipe 321 serves to introduce the sucked outside air into the inside. It is.

In addition, the condensate separator 331 serves to remove condensate generated when the cooler 33 operates.

In addition, the dry air discharge unit 40 is a dry air discharge pipe 41 for discharging the dried compressed air, and the second filter 42 for removing impurities such as dust of the drying agent generated during the discharge of the dried compressed air. It consists of.

In addition, the control unit 50 is provided with a control box 51 serves to control each part of the operation and opening and closing.

Looking at the configuration diagram showing the regeneration unit of the air dryer according to the invention as shown in Figure 4,

Looking at the regeneration process of the drying tower (21) 22 in a state in which the first drying tower 21 is a drying process and the second drying tower 22 is a regeneration process,

Compressed air inlet pipe 15 is connected to the first drying tower 21 by a first switching valve 31 to allow the compressed air to dry in the first drying tower 21, and the second drying. Tower 22 is to be connected to the outdoor air discharge pipe (311).

Then, the outside air is sucked from the outside air suction pipe 321 of the second switching valve 32 and the outside air suction filter 322 is provided in the suction process to allow the outside air to be sucked in the state of filtering external impurities.

The outside air so sucked is heated by the heater 34, and the heated outside air is introduced into the second drying tower 22 by the blower 35 to contain moisture in the interior of the drying towers 21 and 22. The drying agent is heated to allow the water to evaporate.

The evaporated water is discharged to the outside by the external air discharge pipe 311 connected to the lower side of the second drying tower 22.

When the water removal process of the drying material of the second drying tower 22 is completed as described above, the second drying tower 22 should be cooled,

At this time, the end of the outside air inlet pipe and the outside air discharge pipe 311 is connected by the valve switching of the second switching valve 32, so that the outside air discharge pipe 311 and the cooler 33 is connected.

In other words, the discharge of air to the outside is blocked and the internal circulation of the air is made.

When the cooler 33 is operated in the state where the internal circulation of air is made, the second drying tower 22 is naturally cooled.

The condensate generated during the cooling process is completely removed by the condensate separator 331 to minimize the water content of the circulated cooling air and to prevent damage to the regeneration unit 30 by water.

After the cooling of the second drying tower 22 is finished, the opening / closing valves 36, 37, 38 are operated to equalize the drying towers 21, 22, and then the drying towers 21, 22. The alternation of the drying tower is completed, and the drying process of the first drying tower 21 is finished and the drying process of the second drying tower 22 is started.

Here, when equalizing, the dry air discharged from the first drying tower 21 is closed by closing the first opening / closing valve 36 and the third opening / closing valve 38 and opening the second opening / closing valve 37. The first drying tower 21 and the second drying tower 22 are equalized by being injected into the second drying tower 22.

After the pressure of the drying towers 21 and 22 is equalized by opening and closing the open / close valves 36, 37 and 38, the second drying tower is switched by the valve of the first switching valve 31. It is to connect the compressed air inlet pipe 15 so that compressed air flows into (22).

In addition, the first drying tower 21 is connected to the outside air discharge pipe 311 to perform the same process as that of the second drying tower 22 to regenerate the first drying tower 21. will be.

Here, when the first drying tower 21 and the outside air discharge pipe 311 is connected, the pressure reducing pipe 312 provided in the outside air discharge pipe 311 is opened to lower the pressure of the first drying tower 21. After connecting the outside air discharge pipe 311,

It is to prevent damage to the equipment of the pipe or the regeneration unit 30 by the pressure difference between the pressure of the first drying tower 21 and the pressure of the outside air discharge pipe (311).

After the pressure is lowered as described above, the on-off valves 36 and 38 are opened and the drying and regeneration of the first drying tower 21 and the second drying tower 22 are repeated again, thereby continuously drying. To produce compressed air.

As described above, the present invention sucks and heats the outside air, heats the drying tower to the heated outside, discharges the evaporated water from the drying tower, and dries by circulating the internal air after the water is discharged. By providing a regeneration method of the air intake regenerative adsorption air dryer comprising the steps of cooling the tower, the air dryer is regenerated by the outside air without losing the compressed air discharged from the air dryer, thereby reducing the production cost due to the loss of the compressed air. The rise is eliminated and the load of the air compressor is kept constant, and the air can be used from low pressure air to high pressure air, thereby increasing its use range and minimizing energy loss, thereby maximizing compressed air production capacity.

In addition, the present invention provides a regeneration apparatus of an external air suction regenerative adsorption air dryer composed of a switching valve, a cooler, a heater and a blower to regenerate the drying tower of the air dryer by external air, thereby providing compressed air discharged from the air dryer. The air dryer is regenerated by the circulation of outside air and internal air without any loss of, thereby eliminating the increase in production cost due to the loss of compressed air, thereby maximizing the production capacity of compressed air and minimizing the loss of energy. Since the load of the air compressor is kept constant and can be used from low pressure air to high pressure air, the range of use thereof is expanded, thereby maximizing the convenience of use and securing the safety of the device.

In addition, the present invention provides a regeneration apparatus of an outside air suction regenerative adsorption air dryer provided with a pressure reducing pipe between the first switching valve and the outside air discharge pipe, so that the inside of the drying tower is heated before the drying tower is heated by the heated outside air. The pressure of the gas is gradually decreased to prevent damage to the pipe or damage to the equipment due to the pressure difference between the air inside the regeneration unit and the drying unit.

In addition, the present invention provides a regeneration device of an external air suction regenerative adsorption air dryer having a condensate separator on one side of the cooler, thereby removing condensate generated by the operation of the cooler during circulation of the internal air, thereby regenerating a drying tower. This has the effect of maximizing, and also has the effect of preventing damage due to corrosion of the device of the regeneration unit by moisture.

In addition, the present invention provides a regeneration device of the external air suction regeneration adsorption air dryer equipped with an on-off valve in the pipe connected to the regeneration unit and the drying unit, the pair of drying tower is uniform with each other during the exchange of drying and regeneration process The pressure state of the regeneration unit and the drying unit prevents damage to the pipe connected to the drying tower or equipment of the regeneration unit, thereby easily distinguishing between the low pressure unit and the high pressure unit, thereby ensuring the safety of operation. .

Claims (5)

A first step (S1) of sucking and heating external air, and injecting the heated external air into the drying towers 21 and 22 to heat the interior of the drying towers 21 and 22; A second step (S2) of discharging moisture inside the drying towers (21) and (22) by the heating of the first step (S1) to the outside; After the discharge of the water of the second step (S2) is finished, the outside air suction regenerative type comprising a third step (S3) of circulating the cooled internal air to cool the heated drying tower (21, 22) Regeneration method of adsorption air dryer. A pair of drying towers 21 and 22 filled with a drying material is provided, and a compressed air inlet pipe 15 is provided at the lower side of the drying tower 21 and 22, and the compressed air is dried on the upper side thereof. In the adsorption type air dryer (1) which is provided with a dry air discharge pipe (41) for discharging air to dry the compressed air by the continuous alternating of the drying tower (21) (22); It is provided between the drying tower (21) 22 and the compressed air inlet pipe 15, one side is provided with an external air discharge pipe 311, the other side is provided with a compressed air inlet pipe (15) A first switching valve 31 alternately connecting the compressed air inlet pipe 15 and the outdoor air discharge pipe 311 to the tower 21 and 22; It is provided at the other end of the outside air discharge pipe 311, one side of the outside air discharge pipe 311 is connected, the other side is provided with an outside air suction pipe 321 alternate between the outside air discharge pipe 311 and the outside air suction pipe 321. A second switching valve 32 connected to each other; A cooler (33) connected to one side of the second switching valve (32) so as to correspond to the external air discharge pipe (311); A heater (34) connected to the cooler (33) by a pipe, the other end of which is connected to the dry air discharge pipe (41) on the upper side of the drying tower (21) (22) by a pipe; Regeneration device of the outside air intake regenerative adsorption air dryer, characterized in that it comprises a blower (35) provided between the second switching valve (32) and the heater (34). The method of claim 2 wherein the first switching valve 31, Regeneration of the outside air intake regenerative adsorption air dryer, characterized in that the pressure reducing pipe 312 is provided between the outside air discharge pipe 311 of the lower side so that the pressure of the drying tower (21, 22) is gradually dropped. Device. The cooler (33) of claim 2, Regeneration device of a suction type air dryer, characterized in that the condensate separator 331 is provided on one side of the pipe. The method of claim 2; A first opening / closing valve 36 is provided in a pipe connecting the heater 34 and the drying towers 21 and 22, and between the first opening / closing valve 36 and the drying towers 21 and 22. A pipe having a second open / close valve 37 is connected between the pipe and the dry air discharge pipe 41, and the external air discharge pipe 311 is provided with a third open / close valve 38. Regeneration device of suction regeneration adsorption air dryer.