KR101828030B1 - Heat exchanger washing apparatus and heat exchanger washing method using the same - Google Patents

Abstract

The present invention relates to a heat exchanger cleaning apparatus and a heat exchanger cleaning method using the same, wherein the heat exchanger cleaning apparatus includes a cleaning tank having a storage space in which a cleaning liquid mixed with a cleaning agent and purified water is contained, A cleaning unit for cleaning the cleaning liquid to remove foreign matters adhered to the outer circumferential surface of the cleaned object heat exchanger connected to the spray unit and immersed in the cleaning liquid, A cleaning liquid supply part for supplying the cleaning liquid to the spray tube so that the spray liquid can be sprayed to the spray tube and an air supply part for supplying air to the spray tube so that high pressure air can be sprayed through the spray hole.
The heat exchanger cleaning apparatus and the heat exchanger cleaning method using the same according to the present invention can remove the foreign substances adhered to the heat exchanger by spraying the cleaning liquid at high pressure or generating a large number of bubbles in the washing tank immersed in the heat exchanger, So that damage to the heat exchanger can be minimized and the cleaning efficiency is also excellent.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger washing apparatus and a heat exchanger washing method using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger cleaning apparatus and a heat exchanger cleaning method using the same, and more particularly, to a heat exchanger cleaning apparatus that cleans a heat exchanger through a cleaning liquid in which a cleaning agent and purified water are mixed, and a heat exchanger cleaning method using the same.

Heat exchangers are used in various fields as a device for heat exchange between a low-temperature fluid and a high-temperature fluid. For example, as a heater, a preheater, a superheater, a reheater, a cooler, a condenser and an evaporator in a chemical industry such as a power plant, a gas turbine, a heating device, an air conditioner, a refrigerating device and a catalytic reactor.

A hot water inlet and a cooling water outlet are formed at the upper side of the heat exchanger, and a hot water outlet and a cooling water inlet are provided at the lower side of the side. In the heat exchanger, a plurality of heat exchange plates are aligned and positioned, and through holes are formed in upper and lower portions of the heat exchange plate to allow hot water or cooling water to pass therethrough. The hot water or cooling water flowing along the spaces between the heat exchange plates contains foreign matter. Such foreign matter is deposited on the heat exchange plate, and the deposited foreign matter (hereinafter referred to as 'scale') interrupts heat exchange and lowers heat exchange efficiency. Particularly hot water flows along the piping and thus contains less foreign matter that can be scaled, but cooling water generally contains foreign substances that can be scaled by using water exposed to the atmosphere.

In order to remove such a scale, the heat exchanger is disassembled to clean each heat exchanger plate. However, since the distance between the heat exchange plates is as small as 3 mm or less, a large amount of work is required to remove the scale, and the operation is very delicate and the operation efficiency is lowered. And the operation is stopped while the heat exchanger is being cleaned. Further, in the case of a welded type heat exchanger, disassembly is impossible and maintenance is difficult.

Korean Patent Laid-Open No. 10-2012-0110499: Washing nozzle for heat exchanger and cleaning device for heat exchanger using same

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems described above, and it is an object of the present invention to provide a heat exchanger cleaning apparatus for spraying a cleaning liquid at a high pressure or generating a large number of bubbles in a cleaning tank immersed in a heat exchanger, And an object of the present invention is to provide a method of cleaning a heat exchanger.

In order to accomplish the above object, the present invention provides a cleaning apparatus for a heat exchanger, comprising: a cleaning tank having a housing space in which a cleaning liquid mixed with a cleaning agent and purified water is contained; and a plurality of nozzles formed in the housing space, A spraying unit connected to the spraying unit for spraying the cleaning liquid through the spraying hole to remove foreign substances adhering to the outer circumferential surface of the heat exchanger to be cleaned immersed in the cleaning liquid, A cleaning liquid supply part for supplying the cleaning liquid; and an air supply part for supplying air to the spray tube so that high pressure air can be sprayed through the spray hole.

According to another aspect of the present invention, there is provided a heat exchanger cleaning apparatus, comprising: a separation tank installed in the cleaning tank for supporting the heat exchanger in a spaced relation to the spray tube; And is formed on the upper outer circumferential surface of the spray pipe facing the heat exchanger so as to be sprayed toward the heat exchanger.

The cleaning liquid supply unit may include a connection pipe having one end connected to the cleaning tank and the other end connected to the injection pipe and a supply pump provided in the connection pipe for supplying the cleaning liquid contained in the cleaning tank to the injection pipe do.

According to another aspect of the present invention, there is provided a method of cleaning a heat exchanger, comprising: a cleaning liquid injecting step of injecting a cleaning liquid mixed with a cleaning agent and purified water into a cleaning tank; And a plurality of spray holes formed in the outer circumferential surface of the washing tank to spray a high-pressure washer fluid toward the heat exchanger to remove foreign substances adhering to the outside of the heat exchanger, And an injection cleaning step of alternately injecting a cleaning liquid or high-pressure air.

Wherein the injection cleaning step includes a first spar step for injecting the cleaning liquid contained in the cleaning tank into the spray tube for a predetermined first spar time so that the flow of the cleaning liquid passing through the outer circumferential surface of the heat exchanger is generated, A bubbling step of spraying high-pressure air to the spray tube so as to generate a large number of bubbles in the cleaning liquid contained in the washing tank to remove foreign matter remaining on the outside of the heat exchanger when the step is completed, And a second spar step for injecting the cleaning liquid accommodated in the cleaning tank into the spray tube for a predetermined second sparse time to remove the foreign matter adhered to the heat exchanger once completed.

In the meantime, the method of cleaning a heat exchanger according to the present invention is characterized in that a foreign substance adhered to the outer circumferential surface of the heat exchanger in a state where the heat exchanger is immersed in the cleaning liquid is set between the heat exchanger setting step and the injection cleaning step, Quot; is called.

According to another aspect of the present invention, there is provided a method of cleaning a heat exchanger, comprising: a drainage step of discharging a washing liquid and a foreign substance contained in the washing tank to the outside, when the drain cleaning step is completed; A cleaning liquid and a cleaning liquid accommodated in the cleaning tank in the spray tube so that the cleaning liquid and the air can be sprayed through the spray hole when the purified water injection step is completed, And a rinsing step of alternately injecting high-pressure air.

The method further includes a drying step of discharging purified water from the washing tank and injecting high-pressure air into the spray pipe to dry the heat exchanger when the rinsing step is completed.

In the meantime, the method of cleaning a heat exchanger according to the present invention may further include an internal cleaning step of removing foreign substances adhered to the inside of the heat exchanger before the injection of the cleaning liquid or after the injection cleaning step, A tank injecting step of injecting a washing liquid mixed with a cleaning material and a purified water to clean the inside of the heat exchanger; and an inlet port of the heat exchanger through which the heat exchanging medium is injected, A pipe connection step of connecting the discharge port of the heat exchanger through which the heat exchange medium is discharged and the storage tank through a return pipe; A pumping step of operating an injection pump installed in the pipe, A stopping step of stopping the injection pump for a predetermined stopping time so that foreign substances adhered to the inner circumferential surface of the heat exchanger may be called into the washing liquid, and a step of stopping the injection pump so that the washing liquid is circulated into the heat exchanger And a scale removal step for operating the pump.

The inner cleaning step may include a tank bleeding step of discharging the cleaning liquid and the foreign substances contained in the receiving tank to the outside when the scale removing step is completed, and injecting purified water into the receiving tank when the tank is emptyed, And circulating the purified water through the heat exchanger by operating an injection pump.

The heat exchanger cleaning apparatus and the heat exchanger cleaning method using the same according to the present invention can remove the foreign substances adhered to the heat exchanger by spraying the cleaning liquid at high pressure or generating a large number of bubbles in the washing tank immersed in the heat exchanger, So that damage to the heat exchanger can be minimized and the cleaning efficiency is also excellent.

1 is a perspective view of a heat exchanger cleaning apparatus according to the present invention,
Figure 2 is a cross-sectional view of the heat exchanger cleaning apparatus of Figure 1,
3 is a perspective view of the internal cleaning apparatus used in the heat exchanger cleaning method according to the present invention,
4 is a block diagram of an internal cleaning stage of the heat exchanger cleaning method according to the present invention,
FIG. 5 is a block diagram of an external draining step of a heat exchanger cleaning method in accordance with the present invention.

Hereinafter, a heat exchanger cleaning apparatus 100 according to a preferred embodiment of the present invention and a heat exchanger cleaning method using the same will be described in detail with reference to the accompanying drawings.

1 and 2 show a heat exchanger cleaning apparatus 100 according to the present invention.

Referring to the drawings, a heat exchanger washing apparatus 100 includes a washing tank 110 having a receiving space 111 in which a cleaning liquid mixed with a cleansing agent and purified water is contained, and a washing tank 110 installed in the receiving space 111, A spraying part 120 including a spraying tube 121 having a plurality of spraying holes formed on an outer circumferential surface thereof and a foreign matter adhered to the outer circumferential surface of the washing subject heat exchanger 15 connected to the spraying part 120 and immersed in the washing liquid, A cleaning liquid supply unit 130 for supplying the cleaning liquid to the spray tube 121 so that the cleaning liquid can be sprayed through the spray hole to remove high pressure air, And an air supply unit 140 for supplying air to the air supply unit 121.

The washing tank 110 is formed in a rectangular parallelepiped shape having a receiving space 111 therein. In addition, the washing tank 110 is opened at the top to inject the heat exchanger 15 into the washing tank 110 or to inject the washing liquid. Although not shown in the drawing, the washing tank 110 is provided at its lower portion with a drain pipe for discharging a cleaning liquid or foreign substance contained in the washing tank 110 to the outside, As shown in Fig.

The jetting unit 120 includes a plurality of jetting pipes 121 installed in the washing tank 110 and a manifold 122 connected to the jetting pipes 121 to be drawn into the receiving space 111 Respectively.

The spray tubes 121 extend in the front-rear direction, and a plurality of the spray tubes 121 are arranged to be spaced apart from each other in the left-right direction. A plurality of jetting holes are formed in the upper outer peripheral surface of the jetting tube 121 corresponding to the receiving space 111 of the washing tank 110 so that the fluid flowing through the flow channel can be ejected. Respectively.

At this time, the spray tube 121 is installed at a lower portion of the receiving space 111, and is supported at a predetermined distance from the bottom surface of the washing tank 110 by a plurality of spacers. The lower end of the spacing plate is fixed to the bottom surface of the washing tank 110 and the upper end of the spacing plate is fixed to the lower outer circumferential surface of the spray tube 121 and a plurality of the spacing plates are spaced apart from each other along the longitudinal direction of the spray tube 121.

The manifold 122 extends in the left-right direction, and the front ends of the injection tubes 121 protruding outside the washing tank 110 are connected. The manifold 122 has a communication passage formed therein so as to communicate with the flow path of the spray tube 121.

The cleaning liquid supply unit 130 includes a connection pipe 131 having one end connected to the cleaning tank 110 and the other end connected to the manifold 122 and a connection pipe 131 provided at the connection pipe 131, And a supply pump 132 for supplying the received cleaning liquid to the spray tube 121. At this time, the connection pipe 131 is provided with a first opening / closing valve for selectively opening and closing the internal flow path of the connection pipe 131.

The air supply unit 140 includes an air injection pipe 202 141 having one end connected to the manifold 122 and an air injection pipe 202 141 141 provided at the end of the air injection pipe 202 And a compressor 142 for injecting high-pressure air into the manifold 122 through the manifold 122. At this time, a second opening / closing valve is provided in the air injection pipes 202 and 141 so that the internal flow path of the air injection pipes 202 and 141 can be selectively opened and closed.

The heat exchanger cleaning apparatus 100 according to the present invention is installed inside the cleaning tank 110 and is provided with a spacing support part 150 for supporting the heat exchanger 15 so as to be spaced upward from the spraying tube 121 ).

The spacing support unit 150 includes a plurality of support plates 151 disposed between the spray tubes 121 and a support plate 151 fixed to the lower surface of the support plates 151 to support the support plate 151 above the bottom surface of the cleaning tank 110 As shown in FIG.

The support plate 151 is disposed inside the cleaning tank 110 and has a predetermined thickness and is formed in a plate shape extending in the front-rear direction along the spray tube 121. It is preferable that the support plate 151 is made of stainless steel excellent in corrosion resistance so as to prevent corrosion to the cleaning liquid.

The upper end of the support leg 152 is fixed to the lower surface of the support plate 151 and the lower end of the support leg 152 is fixed to the bottom surface of the cleaning tank 110. A plurality of support legs 152 are provided so as to be spaced apart from each other along the longitudinal direction of the support plate 151. The support leg 152 is longer than the length from the bottom surface of the cleaning tank 110 to the upper outer peripheral surface of the spray tube 121 so that the support plate 151 can be positioned above the spray tube 121, .

The heat exchanger cleaning method using the heat exchanger cleaning apparatus 100 configured as described above will be described in more detail as follows. The heat exchanger cleaning method includes an internal cleaning step of cleaning the internal flow path of the heat exchanger 15 and an external cleaning step of cleaning the exterior of the heat exchanger 15 using the heat exchanger cleaning apparatus 100.

The inner cleaning step is a step of cleaning the inner flow path of the heat exchanger (15) using the inner cleaning apparatus (200). The internal cleaning apparatus 200 will be described in detail as follows.

The internal cleaning apparatus 200 includes a storage tank 201 having an injection space into which a cleaning liquid mixed with a cleaning agent and purified water is injected to clean the interior of the heat exchanger 15, And the other end of which is connected to an inlet of a heat exchanger 15 into which a heat exchange medium is injected, and the other end of which is connected to the heat exchanger 15 And an infusion pump 204 installed in the infusion tube 202 for pumping the washing solution contained in the storage tank 201 and injecting the cleaning solution into the heat exchanger 15 .

4, the internal cleaning step includes a tank injection step, a pipe connection step, a pumping step, a stop step, a descaling step, a tank emptying step, and a purified water circulation step.

The tank injecting step is a step of injecting the cleaning liquid mixed with the cleaning material and the purified water into the accommodating tank 201 to clean the inside of the heat exchanger 15. [ At this time, the operator prepares the cleaning liquid by adjusting the ratio of the cleaning material and the purified water according to the type of the heat exchange medium used in the heat exchanger 15. [ At this time, a commercially available cleaning material may be used for cleaning.

The piping connection step connects the injection pipe 202 of the internal cleaning device 200 to the inlet of the heat exchanger 15 when the tank injection step is completed and connects the inlet pipe 202 of the internal cleaning device 200 to the outlet of the heat exchanger 15. [ And connecting the return pipe 203. The operator connects the injection pipe 202 and the return pipe 203 to the heat exchanger 15 so as to communicate the internal flow path of the storage tank 201 and the heat exchanger 15 with each other.

The pumping step is a step of operating the injection pump 204 installed in the injection tube 202 so that the cleaning solution is injected into the heat exchanger 15 when the piping connection step is completed. When the injection pump 204 is operated, the cleaning liquid contained in the accommodation tank 201 is injected into the heat exchanger 15 through the injection pipe 202, and the cleaning liquid passed through the heat exchanger 15 passes through the return pipe 203 And then flows into the receiving tank 201. At this time, the injection pump 204 operates at a pressure of 3 kg / cm ² or less, and the operator can check the occurrence of the leakage of the cleaning liquid to the injection tube 202, the return pipe 203 and the heat exchanger 15.

Stopping the infusion pump 204 for a predetermined stop time so that foreign substances adhered to the inner circumferential surface of the heat exchanger 15 can be called into the washing liquid when the washing liquid is filled into the heat exchanger 15 to be. The operator can stop the injection pump 204 for about 30 minutes, but the stopping time of the injection pump 204 is not limited to this, but can be changed according to the size of the heat exchanger 15. [

The scale removing step is a step of operating the injection pump 204 so that the washing liquid can be circulated into the heat exchanger 15 when the stopping step is completed. The worker passes the washing liquid through the injection pump 204 into the heat exchanger 15 to transfer the foreign matter dissolved in the heat exchanger 15 to the washing tank. At this time, the injection pump 204 may be operated for about 30 minutes, but the operation time of the injection pump 204 may be changed according to the size of the heat exchanger 15, not limited thereto.

On the other hand, the operator may stop the infusion pump 204 or extend the operating time of the infusion pump 204 depending on the amount of foreign matter that has flowed into the cleaning tank after 30 minutes or the cleanliness inside the heat exchanger 15 . At this time, in order to check the cleanliness of the inside of the heat exchanger 15, the endoscope camera equipment is pulled into the heat exchanger 15 and the degree of washing inside the heat exchanger 15 is measured through the image taken through the endoscope camera equipment .

The tank emptying step is a step of discharging the cleaning liquid and the foreign substances contained in the accommodating tank 201 to the outside when the descaling step is completed. At this time, the worker separates the injection pipe 202 and the return pipe 203 from the heat exchanger 15 as well as the receiving tank 201, and then the inside of the heat exchanger 15, the injection pipe 202 and the return pipe 203). ≪ / RTI > After the discharge of the washing liquid and the foreign substance is completed, the inlet tube 202 and the return tube 203 are connected to the inlet and outlet of the heat exchanger 15, respectively.

The purified water circulation step is a step of injecting purified water into the storage tank 201 when the tank empty step is completed and circulating the purified water into the heat exchanger 15 by operating the injection pump 204. The purified water injected into the heat exchanger 15 through the injection pump 204 passes through the inside of the heat exchanger 15 and then flows into the receiving tank 201 through the return pipe 203, And transfers the foreign matter remaining in the storage tank 201 to the storage tank 201. At this time, the operator can operate the injection pump 204 for about 30 minutes, but the operation time of the injection pump 204 is not limited to this but can be changed according to the size of the heat exchanger 15. [

When the purified water circulation step is completed, the operator separates the injection pipe 202 and the return pipe 203 from the heat exchanger 15 to clean the outside of the heat exchanger 15. [ Meanwhile, although the internal cleaning step has been described as proceeding before the external cleaning step, the internal cleaning step is not limited thereto but may be performed after the external cleaning step.

5, the external cleaning step includes a cleaning liquid injection step, a heat exchanger setting step, a boiling step, an injection cleaning step, a drainage step, a water injection step, a rinsing step and a drying step.

The cleaning liquid injecting step is a step of injecting a cleaning liquid mixed with a cleaning agent and purified water into the washing tank 110 of the heat exchanger cleaning apparatus 100. At this time, the operator adjusts the ratio of the cleaning material and the purified water according to the type of the fluid passing through the outside of the heat exchanger 15 to prepare the cleaning liquid. At this time, a commercially available cleaning material may be used for cleaning.

The heat exchanger setting step is a step of setting the to-be-cleaned heat exchanger (15) inside the washing tank (110) to be immersed in the washing liquid when the washing liquid injecting step is completed. The operator places the to-be-cleaned heat exchanger 15 on the upper surface of the support plates 151 of the spacing support part 150 provided inside the cleaning tank 110. When the heat exchanger 15 mounted on the upper surface of the support plates 151 is not immersed in the cleaning liquid injected into the cleaning tank 110, the cleaning liquid is supplied to the cleaning tank 110 so that the heat exchanger 15 is immersed in the cleaning liquid. Inject.

In the step of calling, the foreign substance adhered to the outer circumferential surface of the heat exchanger (15) in a state where the heat exchanger (15) is immersed in the washing liquid is called the washing liquid for a predetermined time. The operator can leave the heat exchanger 15 immersed in the cleaning liquid for 30 minutes to 1 hour while the duration is not limited thereto but can be changed according to the size of the heat exchanger 15 .

The injection cleaning step is installed inside the cleaning tank 110 so that a high-pressure cleaning solution is injected toward the heat exchanger 15 to remove foreign substances adhered to the outside of the heat exchanger 15, and a plurality of injection holes And alternately injecting the cleaning liquid or high-pressure air into the spray tube 121 formed therein. At this time, the injection cleaning step includes a first spar step, a first bubbling step and a second spar step.

The first spa stage is a step of injecting the washing liquid contained in the washing tank 110 into the spray tube 121 for a predetermined first spa time so that the flow of the washing liquid passing through the outer circumferential surface of the heat exchanger 15 is generated to be. The operator operates the feed pump 132 of the heat exchanger cleaner 100 during a first sparse time of about 20 minutes. The cleaning liquid in the cleaning tank 110 is pumped to a high pressure by the supply pump 132 and injected into the manifold 122 and supplied to the spray pipes 121 through the manifold 122. The washing liquid injected into the spray tubes 121 is injected upward through a spray hole formed in the spray tube 121. The cleaning liquid discharged through the spray holes flows through the outer circumferential surface of the heat exchanger 15 and removes foreign matter adhering to the outer circumferential surface of the heat exchanger 15. [

In the meantime, although it has been described that the first spa time is 20 minutes, the first spa time is not limited thereto but may be changed according to the size of the heat exchanger 15.

In the first bubbling step, when the first spar step is completed, the first bubbling step is performed to remove foreign substances remaining outside the heat exchanger (15), so that the bubbles can be generated in the cleaning liquid contained in the cleaning tank (110) And injecting the high-pressure air into the air supply pipe 121. The operator operates the compressor 142 to inject high-pressure air into the manifold 122. [ The air injected into the manifold 122 is supplied to the spray tubes 121 and is sprayed toward the heat exchanger 15 through the spray holes formed in the spray tubes 121, To generate bubbles. The bubbles collide with the outer circumferential surface of the heat exchanger (15) and remove foreign matter adhering to the outer circumferential surface of the heat exchanger (15).

At this time, the operator operates the compressor 142 for about 10 minutes to generate bubbles. The operation time of the compressor 142 is not limited to this but can be changed according to the size of the heat exchanger 15. [

In the second spar step, when the first bubbling step is completed, the washing liquid contained in the washing tank 110 is supplied to the spray tube 121 by a predetermined second sparge (not shown) so as to remove foreign matter adhering to the heat exchanger 15 again. For a period of time. The operator operates the feed pump 132 of the heat exchanger cleaning apparatus 100 during a second sparge time of about 5 minutes. The cleaning liquid in the cleaning tank 110 is pumped to a high pressure by the supply pump 132 and injected into the manifold 122 and supplied to the spray pipes 121 through the manifold 122. The washing liquid injected into the spray tubes 121 is injected upward through a spray hole formed in the spray tube 121. The cleaning liquid discharged through the spray holes flows through the outer circumferential surface of the heat exchanger 15 and removes foreign matter adhering to the outer circumferential surface of the heat exchanger 15. [

Meanwhile, although it has been described above that the second sparse time is 5 minutes, the second sparse time is not limited to this but can be changed according to the size of the heat exchanger 15. [

The operator may stop the infusion pump 204 according to the amount of the foreign matter introduced into the washing tank 110 or the clean condition outside the heat exchanger 15 after the lapse of the second spa time, It can also be activated.

The drainage step is a step of discharging the cleaning liquid and foreign substances contained in the cleaning tank 110 to the outside when the injection cleaning step is completed. The operator opens the drain pipe provided in the cleaning tank 110 to discharge the cleaning liquid and foreign substances contained in the cleaning tank 110 to the outside.

The water injection step is a step of injecting purified water into the washing tank 110 so that the heat exchanger 15 set in the washing tank 110 is immersed when the drainage step is completed.

The rinsing step is a step of alternately injecting the cleaning liquid and the high-pressure air contained in the cleaning tank 110 into the spray tube 121 so that the cleaning liquid and the air can be sprayed through the spray holes when the water purification step is completed. At this time, the rinsing step includes a third spar step and a second bubbling step.

In the third spar step, the cleaning liquid contained in the cleaning tank 110 is injected into the spray tube 121 for a predetermined third spa time to clean the outer circumferential surface of the heat exchanger 15 when the purified water injection step is completed . The operator operates the feed pump 132 of the heat exchanger cleaning apparatus 100 during the third sparge time. The purified water in the cleaning tank 110 is pumped to the high pressure by the supply pump 132 and injected into the manifold 122 and supplied to the spray tubes 121 through the manifold 122. [ The purified water injected into the spray tubes 121 is injected upward through a spray hole formed in the spray tube 121. The purified water discharged through the spray holes flows through the outer circumferential surface of the heat exchanger 15 and rinses the outer circumferential surface of the heat exchanger 15 again.

The second bubbling step may include a step of bubbling the washing liquid stored in the washing tank 110 to remove a foreign material remaining outside the heat exchanger 15 when the third sparging step is completed, And injecting the high-pressure air into the air supply pipe 121. The operator operates the compressor 142 to inject high-pressure air into the manifold 122. [ The air injected into the manifold 122 is supplied to the spray tubes 121 and is sprayed toward the heat exchanger 15 through the spray holes formed in the spray tubes 121, To generate bubbles. The bubbles collide with the outer circumferential surface of the heat exchanger (15) and remove foreign matter adhering to the outer circumferential surface of the heat exchanger (15).

At this time, the operator operates the compressor 142 for about 10 minutes to generate bubbles. The operation time of the compressor 142 is not limited to this but can be changed according to the size of the heat exchanger 15. [

In the drying step, the purified water is discharged from the washing tank 110 and the high-pressure air is injected into the spray pipe 121 to dry the heat exchanger 15 when the rinsing step is completed. The operator opens the drain pipe of the washing tank 110 to discharge the washing liquid and foreign substances contained in the washing tank 110 to the outside. When the drain of the washing liquid is completed, the operator operates the compressor 142 to perform heat exchange And the machine 15 is dried. Through the drying step, the purified water remaining on the outside of the heat exchanger (15) is dried to prevent the heat exchanger (15) from being corroded by the purified water.

In the heat exchanger cleaning apparatus 100 constructed as described above and the heat exchanger cleaning method using the same, the cleaning liquid is sprayed at a high pressure or a large number of bubbles are generated in the cleaning tank 110 in which the heat exchanger 15 is immersed, 15, it is possible to minimize the damage of the heat exchanger 15 and to improve the cleaning efficiency because the brushing operation by the cleaning brush is not required.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

100: Heat exchanger cleaning device
110: Cleaning tank
111: accommodation space
120:
121: Distributor
122: manifold
130:
131: Connector
132: Feed pump
140:
141: Air injection tube
142: Compressor
150:
151: Support plate
152: support leg
200: Internal cleaning device
201: Storage tank
202: injection tube
203: return pipe
204: Infusion pump

Claims (10)

delete delete delete A cleaning liquid injecting step of injecting a cleaning liquid mixed with a cleaning agent and purified water into the inside of the cleaning tank;
A heat exchanger setting step of setting the to-be-cleaned heat exchanger to be immersed in the cleaning liquid, when the cleaning liquid injecting step is completed;
The washing liquid or the high-pressure air is alternately injected into the spray tube, which is installed in the washing tank so that a high-pressure washing liquid is sprayed toward the heat exchanger to remove foreign substances adhered to the outside of the heat exchanger, An injection cleaning step,
The injection cleaning step
A first spar step of injecting the cleaning liquid contained in the cleaning tank into the spray tube for a predetermined first spar time so that a flow of the cleaning liquid passing through the outer circumferential surface of the heat exchanger is generated;
A bubbling step of spraying high-pressure air to the spray tube to generate a large number of bubbles in the cleaning liquid contained in the cleaning tank to remove foreign matter remaining on the outside of the heat exchanger when the first spar step is completed;
And a second spa stage for injecting the washing liquid accommodated in the washing tank into the spray tube for a predetermined second spa time so as to remove foreign matter adhered to the heat exchanger once the bubbling step is completed Gt;
delete 5. The method of claim 4,
And a step in which the foreign substance adhered to the outer circumferential surface of the heat exchanger in a state in which the heat exchanger is immersed in the cleaning liquid is called to the cleaning liquid for a predetermined period of time between the heat exchanger setting step and the injection cleaning step Of the heat exchanger.
The method according to claim 4 or 6,
A drainage step of discharging the cleaning liquid and the foreign substances contained in the cleaning tank to the outside when the injection cleaning step is completed;
A water purification step of injecting purified water into the washing tank so that the heat exchanger set in the washing tank is immersed when the drainage step is completed;
And a rinsing step of alternately injecting the cleaning liquid and the high-pressure air contained in the cleaning tank into the spray tube so that the cleaning liquid and the air can be sprayed through the spray holes when the purified water injection step is completed A heat exchanger cleaning method.
8. The method of claim 7,
Further comprising a drying step of discharging purified water from the washing tank and injecting high-pressure air into the spray tube when the rinsing step is completed, thereby drying the heat exchanger.
5. The method of claim 4,
And an internal cleaning step of removing impurities adhering to the inside of the heat exchanger before the cleaning liquid injection step or after the injection cleaning step,
The internal cleaning step
A tank injecting step of injecting a cleaning liquid mixed with a cleaning material and a purified water into the storage tank for cleaning the inside of the heat exchanger,
Wherein the inlet port of the heat exchanger through which the heat exchanging medium is injected is connected to the accommodating tank through an injection pipe when the tank injecting step is completed and the outlet of the heat exchanger through which the heat exchanging medium is discharged is connected to the accommodating tank through a return pipe A piping connection step,
A pumping step of operating an injection pump installed in the injection tube to inject the cleaning solution into the heat exchanger when the piping connection step is completed,
A stopping step of stopping the injection pump for a predetermined stop time so that foreign substances adhered to the inner circumferential surface of the heat exchanger may be called into the washing liquid when the washing liquid is filled into the heat exchanger,
And a scale removing step of operating the injection pump so that the washing liquid can be circulated into the heat exchanger when the stopping step is completed.
10. The method of claim 9,
The internal cleaning step
A tank emptying step of discharging the cleaning liquid and the foreign substances contained in the receiving tank to the outside when the scale removing step is completed;
Further comprising a purified water circulation step of injecting purified water into the storage tank and circulating the purified water into the heat exchanger by operating the injection pump when the tank is empty.

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