KR100753190B1 - Regenerating process converting valve for absorption type air drying system - Google Patents

Abstract

A converting valve for a regeneration process of an absorption type dehumidifying system is provided to reduce load applied to each pipe during heating and cooling processes in the case that a dehumidifying system has large capacity, and to maintaining accuracy when the dehumidifying system is used for a long time. A first opening and shutting valve(7a) for heating is installed at a pipe branched from a discharge port of an air compressor(3) and connected to an upper part of an absorbing tower(2). A second opening and shutting valve(7b) for heating is installed at a pipe connected to a second cooler(9), being extended from a lower part of the absorbing tower. A third opening and shutting valve(7c) for cooling is installed at a pipe connected to the lower part of the absorbing tower, being branched from a discharge port of a first water separator(5). A fourth opening and shutting valve(7d) for cooling is connected to the second cooler, being extended from the absorbing tower.

Description

Regulating valve for regeneration of adsorption-type dehumidification system {REGENERATING PROCESS CONVERTING VALVE FOR ABSORPTION TYPE AIR DRYING SYSTEM}

1 is a block diagram showing an adsorption type dehumidification system is installed with a redirection valve for regeneration according to the present invention,

2 is a flow chart showing a heating process of a dehumidification process and a regeneration process of the adsorption type dehumidification system equipped with a regeneration direction switching valve according to the present invention;

3 is a flow chart showing a cooling process of a dehumidification process and a regeneration process of the adsorption type dehumidification system equipped with a redirection valve for regeneration according to the present invention.

<Explanation of symbols for main parts of the drawings>

1: first adsorption tower 2: second adsorption tower

3: air compressor 4: first cooler

5: 1st water separator 6: flow control valve

7: Directional valve for regeneration 7a: First opening / closing valve for heating

7b: second open / close valve for heating 7c: third open / close valve for cooling

7d: fourth open / close valve 8: heater

9: second cooler 10: second water separator

11: adsorption first direction switch 12: adsorption second direction switch

13: pre-treatment filter 14: post-treatment filter

15: dry air outlet 16: temperature controller

17: regeneration air shutoff valve 18: dew point measuring instrument

19: timer

The present invention relates to a switching valve, and more particularly, to a redirection valve for regeneration of an adsorption-type dehumidification system that has a small load on the piping of the heating or cooling process (regeneration process), is easy to repair, and maintains precision even for long-term use. It is about.

In general, the adsorption dehumidification system is composed of two adsorption towers in which an adsorbent is embedded, and one of the two adsorption towers is supplied with two adsorption towers alternately performing dehumidification and regeneration functions. And a control panel incorporating a directional valve for switching the valve, an electromagnetic valve and a timer for controlling the operation of the directional valve.

The adsorption type dehumidification system is classified into a non-heating type that does not require a heat source and a heating type that requires a heat source, depending on the method of regenerating the adsorbent in the adsorption tower. On the other hand, the heating type has the advantage of low consumption of regenerated air and high energy use efficiency as a heat source is required.

Here, the heating type for regenerating the adsorbent in the adsorption tower by the heat source is a heater built-in type with a heater built in the adsorption tower, a heater external type with a heater mounted outside the adsorption tower, and a blower mounted on one side of the compressed air supply pipe to absorb the adsorbent. It is divided into a blower purge type of heating and a circulation type of regenerating by circulating compressed air in itself to heat and cool the adsorbent.

Among these, the adsorption type dehumidification system which regenerates the adsorbent by circulation type has the advantage of consuming compressed air by circulating the compressed air in its own, so that the compressed air is not consumed. When the cooling temperature is too low to switch in the incomplete regeneration of the adsorbent has a disadvantage that the adsorption efficiency is lowered and effective operation efficiency is not achieved.

In order to solve this problem, the applicant of the present invention is to improve the regeneration efficiency of the adsorbent by preventing the cooling temperature of the regeneration air from being excessively lowered during the regeneration process, and to improve the operation efficiency by switching the adsorption tower according to the set dew point. He developed a dew point control device and received a patent registration (No. 437273) as of June 14, 2004.

However, since the adsorption-type dehumidification system is composed of a four-way valve for regenerative directional valve 7 for circulating the regenerated air in the regeneration process, when the dehumidification system is large, the load is difficult and the maintenance is difficult, and for a long time In use, there was a risk of leakage due to deterioration of precision.

The present invention has been made in order to solve the problems of the prior art as described above, when the dehumidification system is a large capacity of the adsorption-type dehumidification system is less load on each piping for the regeneration process, easy to repair and maintain precision even in long-term use It is an object to provide a redirection valve for regeneration.

In order to achieve the above object, the reorienting valve for regeneration of the adsorption type dehumidification system of the present invention,

First and second adsorption towers filled with an adsorbent therein to alternately dehumidify the humid air introduced from the outside, an air compressor for sucking and compressing the external humid air, and a first cooler for cooling the humid air discharged from the air compressor. And a first water separator for separating the water contained in the wet air cooled from the first cooler, a flow control valve installed at the discharge port side of the first water separator to maintain a constant amount of regenerated air, and the air. Directional valve for regeneration for circulating the regenerated air sorted through the pipe branched at the discharge port side of the compressor in the regeneration process, and a pipe branched at the discharge port side of the air compressor, installed on the pipe extending from the regeneration direction directional valve. A heater for heating the regenerated air introduced through the gas, a second cooler installed in communication with a port of the redirection valve, and a second A second water separator connected to the discharge port side of the cooler and a lower portion of each of the first and second adsorption towers and a redirection valve for regeneration are used to control the flow of wet air and regeneration air to the first and second adsorption towers. A first direction switch for adsorption, which is composed of a plurality of on / off valves, and an upper portion of the first and second adsorption towers and a heater to switch the flow control of the wet air and the regeneration air to the first and second adsorption towers. In the regeneration direction switching valve of the adsorption type dehumidification system comprising a second direction switching unit for adsorption composed of a plurality of open and close valves,

The regeneration direction switching valve is for heating is installed on the pipe connected to the second cooler while extending from the lower portion of the suction tower is installed on the pipe connected to the upper portion of the adsorption tower while branching from the discharge port side of the air compressor. A second open / close valve, a third open / close valve for cooling installed at a pipe connected to the lower portion of the adsorption tower while branching from the discharge port side of the first water separator, and a fourth open / close valve for cooling connected to the second cooler while extending from the adsorption tower Consists of the first, second, third, fourth open and close valve is composed of a two-way valve;

It is characterized by.

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

1 is a block diagram showing an adsorption type dehumidification system installed with a regeneration direction switching valve according to the present invention, Figure 2 is a heating process of the dehumidification process and regeneration process of the adsorption type dehumidification system is installed regeneration direction switching valve according to the present invention. 3 is a flowchart showing a cooling process of a dehumidifying process and a regenerating process of an adsorption type dehumidifying system equipped with a regeneration direction switching valve according to the present invention.

As shown, the adsorption dehumidification system provided with the regeneration direction switching valve of the present invention, the activated alumina (activated alumina) so that the first and second adsorption tower (1, 2) can adsorb moisture contained in the humid air therein. ), Silica gel (sorbead ws), alumina silica gel (alumina silica gel), molecular sieve (molecular sieves) and the like (desiccant) is filled.

The first and second adsorption towers 1 and 2 are respectively provided with filling / exhaust ports for replacing adsorbents on the outer and lower portions thereof, and a screen mesh made of stainless steel to prevent loss of the adsorbents on the inner and lower portions thereof. An air distributor is built in to properly distribute the flow of air.

The air compressor (3) is located at the top end and compresses wet air introduced from the outside to 7.0 kg / cm 2, and is a general type such as a screw type generating 150 ° C. compressed heat or a turbo type generating 120 ° C. compressed heat. The air compressor can be applied, the wet air is heated to about 100 ~ 150 ℃ by the heat of compression of the air compressor.

The first cooler 4 is installed at the discharge port side of the air compressor 3 to cool the wet air compressed at high and high pressure in the air compressor 3 to a temperature of 40 ° C or lower.

The first water separator 5 is a conventional cyclone type or demister type water separator for separating the condensed water of the wet air generated while being cooled in the first cooler 4.

The flow control valve 6 is installed at the discharge port side of the first water separator 5 to maintain a constant amount of regenerated air used in the regeneration process of the adsorption towers 1 and 2, where regeneration is performed. Air refers to air (about 30 to 40%) that is partially classified among the wet air discharged from the air compressor (3). The flow control valve 6 reduces the amount of regenerated air when the inlet pressure is high, and increases the amount of regenerated air when the inlet pressure is low.

The divert valve (7 (a, b, c, d)) for regeneration diverges from the wet water and the first water separator (5) sorted through piping branched between the air compressor (3) and the first cooler (4). The wet air sorted through the pipe is circulated to the regeneration process of the adsorption tower (1, 2).

The heater 8 is a kind of a conventional electric heater, which is installed on a pipe extending from one side of the first opening / closing valve 7a for heating among the regeneration direction switching valves, and is branched at the discharge port side of the air compressor 3. Some sorted regenerated air is heated to a predetermined temperature through the pipe.

Here, the predetermined temperature is a temperature of 185 ~ 205 ℃ when the adsorbent filled in the adsorption column is activated alumina (activated alumina), 120 ~ 150 ℃ when the silica gel (sorbead ws), molybcular sieves (molecular sieves) In the case of a temperature of 210 ~ 230 ℃.

The second cooler 9 is installed in communication with one port of the heating second switching valve 7b of the regeneration direction switching valve, and is heated by the heater 8 to absorb moisture of the adsorbent in the second adsorption tower 2. The reclaimed regenerated air is cooled to a temperature of 40 ° C or lower.

The second water separator 10 is installed at the discharge port side of the second cooler 9 and is a conventional cyclone type or demister for separating condensed water of regenerated air generated while being cooled in the second cooler 9. Demister type water separator.

The first direction switching part 11 for adsorption may include first to fourth on / off valves 11a installed to selectively communicate with lower portions of the first and second adsorption towers 1 and 2 and regeneration direction switching valves 7 for regeneration. 11b, 11c, and 11d).

Adsorption second direction switching unit 12 is the first to fourth opening and closing valves (12a, 12b, 12c) installed to selectively communicate with each of the upper and the heater (8) of the first and second adsorption tower (1, 2), 12d), and the dry air discharge port 15 communicates with the downstream side of the adsorption second direction switching unit 12.

The adsorption first and second direction switching units 11 and 12 intercept selective flow of humid air and regeneration air so that the first and second adsorption towers 1 and 2 alternately perform dehumidification and regeneration functions. do.

And, the dew point controller is installed on one side of the pipe extending to the lower side of the first and second adsorption tower (1, 2) in the temperature controller (TIC: Temperature Indicate Controller) for detecting the temperature of the recirculated air circulating A regeneration air shut-off valve 17 installed on a pipe at the discharge port side of the sensed second water separator 10 to block circulation of regeneration air according to the sensed cooling temperature of the regeneration air; It consists of a dew point meter (dew point meter) 18 installed on one side of the pipe extending on the upper side of the first and second adsorption tower (1, 2).

In particular, the regenerative directional valve for regeneration of the adsorption type dehumidification system according to the present invention includes the two directional valves for regeneration comprising four two-way valves 7a, 7b, 7c, and 7d, specifically, an air compressor 3. The first opening / closing valve 7a for heating, which is installed at the pipe connected to the upper part of the adsorption tower while branching from the outlet of the outlet, and the second opening / closing for heating is installed at the pipe connected to the second cooler 9 while extending from the lower part of the adsorption tower. It consists of a valve 7b.

In addition, a third open / close valve 7c for cooling installed in a pipe connected to the lower part of the adsorption tower while branching from the discharge port side of the first water separator 5 and cooling connected to the second cooler 9 while extending from the adsorption tower. And a fourth on / off valve 7d.

Preferably, by further comprising a pretreatment filter 13 using activated carbon, etc., between the first water separator 5 and the flow control valve 6, oil / water not removed by the first water separator 5. At the same time to remove the and to discharge through the auto drain (auto drain) to prevent contamination of the adsorbent.

More preferably, the post-treatment filter 14 is further provided on the dry air discharge port 15 side extending from the second direction switching valve 12 for the adsorption tower switching to remove the dust generated from the adsorbent and to use the compressed air. To prevent damage to various equipment.

On the other hand, the pretreatment filter 13 and the aftertreatment filter 14 bypass when the outlet pressure decreases in order to prevent the outlet pressure from being lowered due to excessive differential pressure of the adsorption towers 1 and 2 or malfunction of various valves. Automatically open the valve to keep the outlet pressure constant.

The redirection valve for regeneration of the adsorption type dehumidification system of the present invention configured as described above functions as follows.

First, the first adsorption tower 1 performs a dehumidification process, and the second adsorption tower 2 assumes a time when performing a regeneration process.

In the dehumidification process, after the external humid air is compressed to a high temperature and a high pressure by the air compressor 3, it is cooled by the first cooler 4 and the condensed water of the humid air is separated from the first water separator 5.

The humid air flows into the inlet formed in the lower portion of the first adsorption tower 1 via the flow control valve 6 and the first opening / closing valve 11a of the first direction switching part 11 for adsorption. The second and third on / off valves 11b and 11c are closed and the fourth on / off valve 11d is opened.

The wet air is adsorbed and dried while the wet air contacts the adsorbent while passing from the lower portion of the first adsorption tower 1 to the upper portion.

The dry air dried in the first adsorption tower 1 is intended to use the dry air through the dry air outlet 15 through the open third open / close valve 12c of the second direction switching part 12 for adsorption. It is supplied to the air storage tank or the main air line where it is used, wherein the first and fourth on-off valves 12a and 12d are closed and the second on-off valve 12b is opened.

Next, at the same time as the dehumidification process of the first adsorption tower 1, the regeneration process is performed in the second adsorption tower 2 as follows.

In the heating process of the regeneration process, a portion (30-40%) of the wet air is introduced through a pipe branched between the air compressor 3 and the first cooler 4, and heated to 200 ° C. while passing through the heater 8. And passes through the heating first on / off valve 7a of the regeneration direction switching valve.

Then, the water flows into the upper portion of the second adsorption tower 2 and moves downward to desorb water contained in the fine pores of the adsorbent, and again opens the fourth open / close valve 11d of the first direction switching unit 11 for adsorption. And the second heating and closing valve 7b for heating among the regeneration direction switching valves.

Next, after cooling to 40 ° C. in the second cooler 9, the condensate is separated from the second water separator 10, and the regenerated air thus cooled and the water is removed from the inlet wetted air in the flow control valve 6. When the heating process of the regeneration process is completed, the heater 8 is turned off.

On the other hand, the cooling process of the regeneration process, a portion (30-40%) of the wet air flows through the pipe branched between the first water separator 5 and the flow control valve 6, the cooling of the redirection valve for regeneration The adsorbent is introduced into the lower part of the second adsorption tower 2 through the fourth open / close valve 11d of the first direction switching part 11 for adsorption through the third open / close valve 7c for the adsorption and move upward. Cool.

The second cooler 9 is cooled to 40 ° C. via the second open / close valve 12b of the adsorption second direction switching valve 12 and the fourth open / close valve 7d for cooling among the regeneration direction switching valves. After the condensate is separated from the second water separator 10, the regenerated air thus cooled and the water is removed is joined with the inlet wet air at the flow control valve 6.

Therefore, since four two-way valves 7a, 7b, 7c, and 7d separated by heating or regeneration processes are used for the redirection valve for regeneration, one four-way is used even when the system is large in capacity. The load on each pipe is less than that of using a valve, it is easy to repair, and the precision can be maintained for long-term use.

Here, if the cooling of the adsorbent is too excessive, since the adsorbent may adsorb the regeneration air, when the temperature controller 16 detects that the refrigerating air has a cooling temperature of about 60 to 70 ° C., the regeneration air shutoff valve 17 is closed. By closing the circulation of excessively cooled regenerated air, the regeneration efficiency of the adsorbent can be further improved.

Subsequently, after the regeneration is performed by the heating and cooling process of the second adsorption tower 2, the regeneration air again joins the inlet-side wet air of the first adsorption tower 1 at the flow control valve 6, thereby providing the first adsorption tower ( Dehumidified in 1).

The directional valve for regeneration of the adsorption type dehumidification system of the present invention configured as described above has a small load on the piping of the heating or cooling process (regeneration process) when the dehumidification system has a large capacity, is easy to repair, and maintains precision even for long-term use. Exerting a useful effect.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made within the spirit and scope of the present invention, and such modifications or variations are attached thereto. Belong to the claims.

Claims (1)

First and second adsorption towers filled with an adsorbent therein to alternately dehumidify the humid air introduced from the outside, an air compressor for sucking and compressing the external humid air, and a first cooler for cooling the humid air discharged from the air compressor. And a first water separator for separating the water contained in the wet air cooled from the first cooler, a flow control valve installed at the discharge port side of the first water separator to maintain a constant amount of regenerated air, and the air. Directional valve for regeneration for circulating the regenerated air sorted through the pipe branched at the discharge port side of the compressor in the regeneration process, and a pipe branched at the discharge port side of the air compressor, installed on the pipe extending from the regeneration direction directional valve. A heater for heating the regenerated air introduced through the gas, a second cooler installed in communication with a port of the redirection valve, and a second A second water separator connected to the discharge port side of the cooler and a lower portion of each of the first and second adsorption towers and a redirection valve for regeneration are used to control the flow of wet air and regeneration air to the first and second adsorption towers. A first direction switch for adsorption, which is composed of a plurality of on / off valves, and an upper portion of the first and second adsorption towers and a heater to switch the flow control of the wet air and the regeneration air to the first and second adsorption towers. In the regeneration direction switching valve of the adsorption type dehumidification system comprising a second direction switching unit for adsorption composed of a plurality of open and close valves, The regeneration direction switching valve is for heating is installed on the pipe connected to the second cooler while extending from the lower portion of the suction tower is installed on the pipe connected to the upper portion of the adsorption tower while branching from the discharge port side of the air compressor. A second open / close valve, a third open / close valve for cooling installed at a pipe connected to the lower portion of the adsorption tower while branching from the discharge port side of the first water separator, and a fourth open / close valve for cooling connected to the second cooler while extending from the adsorption tower Consists of the first, second, third, fourth open and close valve is composed of a two-way valve; Directional valve for regeneration of the adsorption type dehumidification system, characterized in that.

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