KR100467791B1 - Heat exchanger self cleaning apparatus using mixture of water and solid particles - Google Patents

Abstract

The present invention relates to a heat exchanger automatic cleaning device using a mixed fluid for automatically cleaning the inner circumferential surface of the vertical heat exchanger tube of the heat exchanger with a mixed fluid of water and solid particles, the configuration of the exhaust gas is introduced into the body of the vertical heat transfer tube A heat exchanger configured to allow heat transfer to the cooling fluid flowing into the fuselage by a cooling fluid pump and passing through the outside of the vertical heat pipe; A mixed fluid collecting part formed to collect a mixed fluid formed of water and solid particles under the fuselage; A storage tank connected to a pipe line from a lower portion of the mixed fluid collecting part and provided to accommodate and flow the mixed fluid; A mixing unit provided to uniformly mix the solid particles stacked in the water tank with water; Comprising an ejector is provided on the pipe connected to the upper side of the body from one side of the water tank so that the mixed fluid uniformly mixed by the mixing unit and a washing unit equipped with a mixed fluid spray nozzle at the end of the pipe will be.

By providing the automatic heat exchanger cleaning device as described above, the inner circumferential surface of the vertical heat exchanger tube of the heat exchanger is automatically cleaned with a mixed fluid of water and solid particles to completely remove the contaminants solidified on the inner surface of the heat exchanger tube and contaminants in the heat exchanger tube. The heat transfer performance is remarkably improved by reducing the ventilation loss due to the accumulation of heat, and further, it has the effect of preventing the blockage of the heat pipe due to solidified contaminants.

Description

Heat exchanger self cleaning apparatus using mixture of water and solid particles}

The present invention relates to a heat exchanger cleaning device for automatically cleaning the inside of a heat exchanger used for recovering waste heat from the exhaust gas of an industrial furnace, such as an industrial furnace, and more specifically, to the inner peripheral surface of the vertical heat transfer tube of the heat exchanger The present invention relates to a heat exchanger automatic cleaning device using a mixed fluid for automatically cleaning with a mixed fluid of solid particles.

In general, a heat exchanger used for recovering waste heat from an exhaust gas such as an industrial furnace or a boiler of an industry is configured such that exhaust gas containing a large amount of pollutants, dust, and corrosive gas flows into the heat transfer.

Therefore, there are various problems such as contaminants, dust, and the like, which are fixed to the heat exchanger tube of the heat exchanger, thereby deteriorating the heat transfer performance or blocking the heat transfer tube itself.

In addition, in order to solve the above problems, the heat exchanger may be dismantled and water may be directly injected into the heat pipe to wash the contaminants. However, in this case, the operation performance of the heat exchanger will be reduced since the operation of the heat exchanger should be stopped. There is a problem that takes a lot of time, manpower and equipment during the cleaning.

In addition, even when directly sprayed with water as described above, there is a problem that it is difficult to completely clean the contaminants solidified for a long time and bound to the heat transfer tube.

In addition, in some cases, water is automatically sprayed inside the heat exchanger to clean the heat pipe, but it is structurally very difficult to spray water at high pressure on all sides of the heat pipe during operation of the heat exchanger. There is a problem that does not completely remove the pollutants.

In order to solve the above problems, there is a 'solid particle circulating fluidized bed heat exchanger for exhaust gas waste heat recovery' (patent registration No. 10-0242226) registered by the present applicant.

It consists of supplying solid particles to clean the inner surface of the heat pipe and circulating in the fuselage of the heat exchanger and the heat pipe. However, when the internal surface of the heat pipe is wet due to condensation of water vapor contained in the exhaust gas, the solid particles are inside. There is a problem in that the adhesion to the cotton to promote the accumulation of contaminants.

In addition, when the inner surface of the heat transfer tube is dried, the solid particles do not flow along the heat transfer surface and most of them fall into a state not in contact with the inner wall of the heat transfer tube.

In addition, the solid particle transfer device of the heat exchanger is very expensive, and even if provided with an expensive transfer device, it is very difficult to spray the solid particles in the upper part of the heat exchanger to be uniformly distributed in the heat exchanger.

Accordingly, the present invention is to improve the conventional solid-state circulating fluidized bed heat exchanger for exhaust gas waste heat recovery in order to solve the conventional problems as described above,

The object is to provide a heat exchanger automatic cleaning device using a mixed fluid for automatically cleaning the inner peripheral surface of the vertical heat exchanger tube of the heat exchanger with a mixed fluid of water and solid particles.

It is also an object of the present invention to provide a heat exchanger automatic cleaning device using a mixed fluid to remove the foreign matter attached to the solid particles while mixing and mixing the water and solid particles uniformly in a simple structure.

In addition, an object of the present invention is to provide a heat exchanger automatic cleaning device using a mixed fluid to filter and filter out fine contaminants such as dust in the water used for washing the vertical heat transfer tube.

It is also an object of the present invention to provide an apparatus for automatically cleaning a heat exchanger using a mixed fluid in which solid particles are mixed with water in a predetermined space inside a reservoir.

In addition, an object of the present invention is to provide a heat exchanger automatic cleaning device using a mixed fluid to maintain a constant water level of the reservoir by the supply and discharge of water.

In addition, an object of the present invention is to provide a heat exchanger automatic cleaning device using a mixed fluid to form a water surface in the mixed fluid collecting portion to collect condensed water and to be evaporated and discharged by the exhaust gas.

In addition, an object of the present invention is to provide a heat exchanger automatic cleaning device using a mixed fluid for controlling the amount of condensate flowing into the reservoir by adjusting the supply amount of the cooling fluid.

In addition, an object of the present invention is to provide a heat exchanger automatic cleaning device using a mixed fluid to form water and solid particles of an alkaline material to wash the inside of the heat exchanger and at the same time neutralize the acidic material.

In order to achieve the above object, the present invention is the exhaust gas is introduced into the interior of the fuselage, passing through the vertical heat pipe, the heat transfer to the cooling fluid flowing into the fuselage by the cooling fluid pump to pass through the outside of the vertical heat pipe occurs In a heat exchanger configured to be; A mixed fluid collecting part formed to collect a mixed fluid formed of water and solid particles under the fuselage; A storage tank connected to a pipe line from a lower portion of the mixed fluid collecting part and provided to accommodate and flow the mixed fluid; A mixing unit provided to uniformly mix the solid particles stacked in the water tank with water; Comprising an ejector is provided on the pipe connected to the upper side of the body from one side of the water tank so that the mixed fluid uniformly mixed by the mixing unit and a washing unit equipped with a mixed fluid spray nozzle at the end of the pipe It is characterized by.

In addition, the mixing unit is provided with a pump on the pipe connected to one side of the reservoir, the water transported by the pump is connected to the pipeline so that one side of the ejector and into the lower side of the reservoir, the end of the pipe downwards The water spray nozzle is mounted, characterized in that the water of the reservoir is configured to be sprayed on the solid particles are laminated to the lower portion and mixed with the water.

In addition, the pump is characterized in that the strainer is provided on the pipeline connected to the reservoir on one side.

In addition, the reservoir is characterized in that the filter net is attached to prevent the inflow of solid particles into the inner center.

In addition, the reservoir is provided with a float valve to the upper side, characterized in that the discharge port is provided on one side of the reservoir to the top of the float valve.

In addition, the reservoir is characterized in that installed on one side of the mixed fluid collecting part so that the water surface is formed in the mixed fluid collecting part in the same line as the water surface therein.

In addition, the reservoir is electrically connected to the cooling fluid pump to the inside is characterized in that the water level sensor for detecting to regulate and regulate the flow rate of the cooling fluid.

In addition, the water and the solid particles are characterized in that formed of an alkaline material that neutralizes acid to prevent corrosion of the fuselage and the vertical heat pipe.

1 is a longitudinal cross-sectional view of the cleaning apparatus according to the present invention;

2 is a longitudinal sectional view showing an operating state of the cleaning apparatus according to the present invention;

3 is a longitudinal sectional view showing another embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

1: cleaning device

10: mixed fluid collecting unit 20: reservoir

30: mixing part

31: pump 32: water spray nozzle

40: washing unit

41: ejector 42: mixed fluid spray nozzle

50: mixed fluid

2: heat exchanger

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

Looking at the entire longitudinal section of the cleaning apparatus according to the invention as shown in Figure 1,

The cleaning apparatus 1 includes a mixed fluid collecting part 10 at a lower portion of the heat exchanger 2, and a storage tank 20 is provided at one side of the mixed fluid collecting part 10, and the The mixing part 30 is provided at one side, and the washing part 40 is provided as the heat exchanger 2 in the reservoir 20.

In a more detailed configuration, the heat exchanger (2) is provided with a plurality of vertical heat transfer tubes (4) in the interior of the cylindrical body (3) upright, the body 3 of the upper and lower parts of the vertical heat transfer tube (4) An exhaust gas inlet 6 and an exhaust gas outlet 7 are provided above and below a cooling fluid inlet 8 and a cooling fluid outlet 9 and a cooling fluid pump 5 provided above and below the vertical heat transfer pipe 4. ) Is provided and configured.

Here, the heat exchanger (2) is discharged through the exhaust gas outlet (7) while the exhaust gas is introduced from the exhaust gas inlet (6) and passes through the vertical heat pipe (4), the outside of the vertical heat pipe (4) It is configured to transfer heat to the flowing cooling fluid.

In this heat transfer process, dust or contaminants contained in exhaust gas accumulate on the inner circumferential surface of the vertical heat transfer tube 4, and water vapor contained in the exhaust gas condenses in the vertical heat transfer tube 4, thereby adhering dust or contaminants. Will be fixed.

In addition, the cleaning device (1) is a device for removing the dust and contaminants adhered and fixed to the inner peripheral surface of the vertical heat pipe (4) with a mixed fluid (50) formed of water (51) and solid particles (52), The mixed fluid collecting part 10 is integrally attached to the lower part of the body 3 and is formed in an inverted cone to serve as a collecting space of the mixed fluid 50.

In addition, the reservoir 20 is connected to the pipeline in the lower portion of the mixed fluid collecting unit 10 is provided to accommodate the mixed fluid 50 is introduced, the filter net 21 is horizontally attached to the center thereof, The float valve 22 and the discharge port 23 is provided on the upper side, and the bottom surface thereof is formed in an inverted cone shape so that the solid particles 52 to be stacked are easily mixed.

Here, the reservoir 20 is a space in which the mixed fluid 50 collected by the mixed fluid collecting part 10 moves to be accommodated in a pipeline and at the same time, the water 51 and the solid particles 52 are mixed together. It serves as a uniformly mixed space.

In addition, the filter net 21 prevents the solid particles 52 mixed with the water 51 at the lower portion of the reservoir 20 from entering the upper portion of the reservoir 20 and passes only the water 51. Thus, the solid particles 52 are isolated and mixed with the water 51 uniformly in a predetermined space, and at the same time, the solid particles 52 having a somewhat large mass flow into the pipe provided in the reservoir 20 and are blocked. To prevent it.

In addition, the float valve 22 is connected to the pipe into which the water 51 flows into the outside of the reservoir 20, and when the reservoir 20 reaches the minimum water level, the float valve 22 opens to supply the water 51, and supplies When the water 51 reaches a certain level, the water is automatically closed to stop the supply of the water 51, thereby maintaining a constant quantity of water in the reservoir 20.

In addition, the outlet 23 may be discharged to the outside when the condensed water generated by the heat exchanger 2 is introduced into the reservoir 20 through the mixed fluid collecting unit 10 and the quantity of the inside of the reservoir 20 is increased. It is.

In addition, the mixing part 30 is provided with a pump 31 on the pipe connected to one side of the reservoir 20 of the upper portion of the filter net 21, the water 51 is transferred by the pump 31 It is connected in a pipeline so as to flow into the lower side of the reservoir 20 of the lower portion of the filter net 21, the water spray nozzle 32 is mounted downward at the end of the pipeline, the reservoir 20 and the pump ( The strainer 33 is mounted on the conduit between 31).

Here, the mixing part 30 serves to mix the solid particles 52 stacked on the lower part of the reservoir 20 and the water 51 existing therein, and at the same time, the contamination on the solid particles 52. It is to wash the material.

In addition, the pump 31 serves to transfer the water 51 on the upper side of the water storage tank 20 to the lower side thereof in a pipe line, and the water spray nozzle 32 is transferred by the pump 31. The water 51 is to be sprayed and mixed to the solid particles 52 stacked in the lower portion of the reservoir 20.

In addition, by cleaning the outer circumferential surface of the solid particles 52 by the injection of water 51, the cleaning performance for the vertical heat pipe (4) of the solid particles 52 is maintained in a state of maximal cleaning The high cleaning efficiency of the device 1 is maintained for a long time.

In addition, the strainer 33 filters the water 51 containing fine contaminants or dust flowing into the upper portion of the reservoir 20 through the filter net 21 while flowing through the pump 31 to filter the water. By purifying itself, the mixture fluid 50 is purified as a whole to improve the washing ability of the vertical heat transfer pipe 4 while at the same time minimizing the pollution of the water 51 not discharged through the outlet 23.

In addition, the washing unit 40 is an ejector 41 on the pipe connected to the upper side of the body 3 from one side of the reservoir 20 of the lower portion of the filtering network 21 so that the mixed fluid 50 is evenly mixed. Is provided, and the mixed fluid injection nozzle 42 is mounted downward in the upper portion of the body 3 at the end of the conduit.

Here, the washing unit 40 transfers the mixed fluid 50 uniformly mixed by the mixing unit 30 and sprayed from the upper portion of the vertical heat transfer tube 4 inside the fuselage 3 to inject the vertical heat transfer tube 4. By riding and flowing down, the pollutants or dust adhered to or adhered to the inner circumferential surface of the vertical heat pipe 4 are washed with water 51 or scraped with solid particles 52 to be cleaned.

In addition, the ejector 41 sucks the mixed fluid 50 formed in the lower portion of the water storage tank 20 and forcibly transfers the upper portion to the upper portion. Is connected is provided to transfer the mixed fluid 50 with the water (51).

In other words, the ejector 41 has a pipe in which the mixed fluid 50 is introduced and a pipe in which the water 51 conveyed by the pump 31 is introduced are connected together so that the mixed fluid 50 and the water 51 are connected. The mixed fluid spray nozzle 42 is transferred to the upper portion of the vertical heat transfer pipe 4 more easily by the conveying force of the ejector 41 and the conveying force of the pump 31. It is to be strongly sprayed through.

On the other hand, looking at the longitudinal cross-sectional view showing the operating state of the cleaning device according to the invention as shown in Figure 2,

First, the heat exchanger (2) flows the exhaust gas discharged from the industrial furnace of the industry into the exhaust gas outlet (7), passes through the vertical heat pipe (4), and exhausts it to the exhaust gas outlet (7), and the cooling fluid pump (5). The cooling fluid flows into the cooling fluid inlet (8), flows out of the vertical heat pipe (4), exits through the cooling fluid outlet (9), and circulates, so that exhaust gas of high heat passes through the vertical heat pipe (4). Through the heat transfer to the cooling fluid will occur.

At this time, the exhaust gas passing through the vertical heat pipe 4 contains contaminants, dust, and the like, and is adhered to and adhered to the inner wall of the vertical heat pipe 4.

The contaminants or dust stuck in this way are washed with the mixed fluid 50 of the water 51 and the solid particles 52 sprayed by the cleaning device 1.

Here, looking at this washing process, the water spray nozzle of the mixing section 30 toward the solid particles 52 isolated from the upper portion of the water tank 20 to the lower portion of the filtering network 21 by the pump 31 The mixed fluid 50, which is sprayed through the 32 and is uniformly mixed with the water 51 and the solid particles 52, is ejected into the upper inside of the body 3 of the heat exchanger 2 by the ejector 41. It is coming in.

The mixed fluid 50 introduced in this way is injected downward from the inside of the fuselage 3 by the mixed fluid injection nozzle 42 toward the upper surface of the vertical heat pipe 4, and thus the mixed fluid 50 injected as described above. Is to be cleaned by scraping or washing the contaminants or dust adhered to the inner wall while flowing down by its own weight along the inner wall of the vertical heat pipe (4).

Then, the mixed fluid 50 to clean the contaminants and dust as described above is continuously flowing down or collected in the mixed fluid collecting unit 10, the mixed fluid 50 collected in this way again through the water tank ( It is introduced into the lower side of 20).

In addition, the solid particles 52 are sinked downward in the mixed fluid 50 introduced into the lower portion of the reservoir 20 as described above, and the stacked solid particles 52 are formed by the water spray nozzle 32. As the contaminants stuck to the outer surface of the solid particles 52 fall, they are mixed with the water 51 uniformly and again supplied to the upper part of the body 3 through the ejector 41.

In this way, the mixed fluid 50 is collected, stored and mixed again and supplied to the heat exchanger 2, and the process of collecting again while cleaning the vertical heat pipe 4 is repeated continuously. It will be cleaned automatically.

The reason why the solid particles 52 fall down or flow down due to their own weight in the vertical heat transfer pipe 4 without being adhered by the condensed water in the circulating process is that the water 51 has a good flowability to the solid particles 52. It is because of giving.

In addition, the water 51 is attached to the inner wall of the vertical heat pipe (4) for a long time can not wash the contaminants, etc. solidified, but the solid particles 52 are washed away as it scratches, so this contaminant is also suitable It can be cleaned and removed.

Therefore, the solid particles 52 and the water 51 play a complementary role to each other and are properly mixed to form the mixed fluid 50, thereby effectively cleaning the vertical heat transfer pipe 4 of the heat exchanger 2. .

On the other hand, looking at the longitudinal cross-sectional view showing another embodiment of the present invention, as shown in FIG.

The exhaust gas flows into the exhaust gas inlet 6 into the heat exchanger 2, passes through the vertical heat pipe 4, and is discharged through the exhaust gas outlet 7, wherein exhaust gas is formed on the inner wall of the vertical heat pipe 4. The water vapor contained in the condensed water will be generated.

The condensate generated as described above flows into or falls into the mixed fluid collecting part 10 and flows into the reservoir 20, and the quantity of the reservoir 20 is increased by the introduced condensate. It is discharged to outside through 23).

However, since the water 51 discharged as described above contains fine pollutants, dust, and the like of the exhaust gas, it is waste water, and such waste water is a source of water pollution.

Therefore, the cleaning device (2) is configured to suppress the discharge of the waste water as described above, and to form a water surface having a constant height inside the mixed fluid collecting part 10 provided in the lower part of the body 3 of the heat exchanger 2 ( The reservoir 20 of 1) is properly installed on one side of the body 3 to fill the water 51.

In addition, the water surface formed inside the mixed fluid collecting part 10 is preferably formed to be somewhat lower than the exhaust gas outlet 7 provided on the lower side of the body (3).

When the water surface is formed inside the mixed fluid collecting unit 10 as described above, the exhaust gas flowing from the exhaust gas inlet 6 of the heat exchanger 2 and discharged to the exhaust gas outlet 7 meets the water surface. A certain amount of water 51 is evaporated and discharged together with the exhaust gas.

In this way, when the water 51 is evaporated and discharged to the exhaust gas outlet 7, condensed water generated by the exhaust gas is removed to prevent an increase in the quantity of the water storage tank 20, and thus the discharge of waste water is naturally suppressed. .

On the other hand, as a configuration for suppressing the discharge of another waste water, the water level sensor 24 is mounted to the inside of the reservoir 20, a control box known in the figure not shown receiving a signal according to the detection of the water level sensor 24 By controlling the cooling fluid pump 5 is appropriately configured so that the flow rate of the cooling fluid to the outside of the vertical heat pipe (4) is adjusted or intermittent.

When the inflow of the cooling fluid in the heat exchanger (2) is reduced or stopped by the above configuration, the temperature difference between the vertical heat transfer pipe (4) and the exhaust gas is reduced to reduce or eliminate condensate water is properly controlled will be.

By adjusting the amount of condensate as described above, the increase in the amount of water in the reservoir 20 is properly adjusted to suppress the discharge of waste water.

Therefore, the present cleaning device 1 effectively cleans contaminants and at the same time controls the discharge of waste water by controlling the inflow of the cooling fluid due to the formation of water surface inside the mixed fluid collecting unit 10 and the mounting of the water level sensor 24. It is composed.

On the other hand, the body 3 of the heat exchanger 2 and the interior of the vertical heat pipe 4 are corroded by the exhaust gas, because the exhaust gas contains acidic contaminants.

In order to prevent corrosion of the fuselage 3 and the vertical heat pipe 4, the mixed fluid 50 is formed of an alkaline material.

In other words, the mixed fluid 50 is formed of water 51 and solid particles 52, wherein the water 51 is provided with an alkaline alkaline liquid, and the solid particles 52 are also alkaline. It is provided with limestone, and neutralizes the inside of the body 3 of the heat exchanger 2 and the vertical heat transfer tube 4 during the cleaning process of the cleaning device 1 by circulation of the mixed fluid 50.

As such, when the acidity of the contaminant is neutralized by the alkaline mixed fluid 50, corrosion of the body 3 and the vertical heat pipe 4 is prevented, thereby greatly increasing the life of the heat exchanger 2 and maximizing heat transfer performance. To be maintained.

Therefore, the cleaning device 1 cleans the inside of the heat exchanger 2 to improve heat transfer performance, and forms the mixed fluid 50 used for the cleaning with an alkaline material to prevent corrosion of the heat exchanger 2. As a result, the life of the heat exchanger 2 is configured to be significantly increased in the state where the heat transfer performance is maximized.

As described above, the present invention automatically cleans the inner circumferential surface of the vertical heat exchanger tube of the heat exchanger with a mixed fluid of water and solid particles, completely removes the contaminants solidified on the inner surface of the heat exchanger tube and ventilates due to the accumulation of contaminants in the heat exchanger tube. The heat loss performance is remarkably improved by reducing the loss, and furthermore, it has the effect of preventing the heat pipe clogging due to solidified contaminants.

In addition, the present invention is a simple structure to uniformly mix and mix water and solid particles to remove foreign substances attached to the solid particles at the same time, the uniform transport and spraying of the solid particles is made accordingly even washing of the heat pipe is made solid It has the effect of improving the washing power of the particles.

In addition, the present invention is to filter out the fine contaminants and foreign substances such as dust from the water used for the washing of the vertical heat transfer tube, has the effect of minimizing the generation of waste water and significantly improving the washing ability of the mixed fluid.

In addition, the present invention is to ensure that the solid particles are mixed with water in a predetermined space inside the reservoir, to prevent the solid particles from being discharged to the outside and to be evenly mixed with water, thereby having a sufficient washing with a small amount of solid particles. .

In addition, the present invention is to maintain the constant level of the water tank by the supply and discharge of water, it is possible to smoothly mix the water and the solid particles inside the reservoir tank has the effect of a stable circulation of the mixed fluid.

In addition, the present invention is to collect the condensed water in the mixed fluid collecting portion and to discharge the collected condensed water by evaporation by the exhaust gas, to prevent the increase in the number of the reservoir tank and accordingly discharge of the waste water due to the increase of the reservoir volume Has the effect of being suppressed.

In addition, the present invention controls the amount of condensed water flowing into the reservoir by adjusting the supply amount of the cooling fluid, thereby preventing the increase in the quantity of the reservoir and thereby suppressing the discharge of waste water due to the increase of the reservoir volume.

In addition, the present invention by washing the inside of the heat exchanger and at the same time neutralizing the acidic material therein, while the smooth heating of the vertical heat pipe is carried out has the effect of preventing corrosion of the fuselage and the vertical heat pipe.

Claims (8)

delete Exhaust gas flows into the fuselage 3 and passes through the vertical heat pipe 4, and enters the fuselage 3 by the cooling fluid pump 5 to the cooling fluid passing through the outside of the vertical heat pipe 4. It is installed in the heat exchanger (2) is configured to heat transfer, the mixed fluid collecting portion formed to collect the mixed fluid 50 formed of water 51 and the solid particles 52 to the lower portion of the body ( 10); A reservoir 20 connected to a pipe line from the lower portion of the mixed fluid collecting part 10 so that the mixed fluid 50 is introduced and received; An ejector 41 is provided on a conduit connected from one side of the reservoir 20 to the upper side of the body 3 so that the mixed fluid 50 is forcibly transferred, and the mixed fluid injection nozzle 42 at the end of the conduit. In the heat exchanger automatic cleaning device using a mixed fluid consisting of a washing unit 40 is mounted; A pump 31 is provided on a pipe connected from one side of the reservoir 20, and water 51 transferred by the pump 31 is one side of the ejector 41 and a lower side of the reservoir 20. It is connected in a pipeline to be introduced into the inside, the water injection nozzle 32 is mounted downward at the end of the pipeline, while the water 51 of the reservoir 20 is sprayed on the solid particles 52 that are laminated thereunder Heat exchanger automatic cleaning device using a mixed fluid, characterized in that the mixing unit 30 for uniformly mixing the solid particles 52 and water (51). The pump 31 according to claim 2, Heater automatic cleaning device using a mixed fluid, characterized in that the strainer 33 is provided on the pipeline connected to the reservoir 20 on one side. The reservoir 20 of claim 2, Heat exchanger automatic cleaning device using a mixed fluid, characterized in that the filter net 21 is attached to prevent the inflow of solid particles (52) to the inner center. The reservoir 20 of claim 2, Float valve 22 is provided on the upper side, the heat exchanger automatic cleaning device using a mixed fluid, characterized in that the discharge port 23 is provided on one side of the reservoir 20 above the float valve (22). The reservoir 20 of claim 2, Heat exchanger automatic cleaning device using a mixed fluid, characterized in that installed on one side of the mixed fluid collecting part 10 so that the water surface is formed in the interior of the mixed fluid collecting part 10 in parallel with the surface of the inside. The reservoir 20 of claim 2, Heat exchanger automatic cleaning device using a mixed fluid, characterized in that the water level sensor 24 is electrically connected to the cooling fluid pump (5) inside to sense to control and regulate the flow rate of the cooling fluid. The method of claim 2 wherein the water 51 and the solid particles 52, Heat exchanger automatic cleaning device using a mixed fluid, characterized in that formed of an alkaline material to neutralize the acid to prevent corrosion of the body (3) and the vertical heat pipe (4).