KR20190127037A - A multi-stage heat exchange type drying system having a cleaning device - Google Patents

Abstract

Disclosed is a multi-stage heat exchange type drying system with cleaning equipment. According to the present invention, the multi-stage heat exchange type drying system with cleaning equipment includes: a first body taking first air discharged from a dryer from one side and discharging the air to the other side, and including a plurality of first heat exchange blocks installed at regular intervals and equipped with a first thermal medium circulation tube to circulate a thermal medium exchanging heat with the first air in a widthwise direction, and hollow first eddy creation blocks installed between the first heat exchange blocks to convert the flow of the first air having gone through the first heat exchange block into an eddy; and cleaning equipment having at least one part placed near the first heat exchange blocks to clean the first heat exchange blocks. According to the present invention, since the cleaning equipment is placed in a heat exchange device to remove dust attached on a heat exchange block, the dust can be quickly removed without disassembly and reassembly of the heat exchange device, and thus, efficiency and workability can be increased by significantly reducing the work suspension time.

Description

A multi-stage heat exchange type drying system having a cleaning device

The present invention relates to a drying system, and more particularly, it is possible to effectively remove the dust (dust) attached to the heat medium circulation tube inside the heat exchange block to prevent fouling (fouling) to corrode the heat transfer surface. The present invention relates to a drying system of a multi-stage separation heat exchange type having a cleaning device capable of improving thermal efficiency and durability of a heat exchanger.

In general, the industrial drying apparatus, particularly agricultural and marine product drying apparatus is provided with a drying chamber for stacking the stack containing the dry matter, and installed a burner and a blower having a heat exchanger in the heating chamber connected to the drying chamber, the external cold flowed into the air inlet The air is heated to dry the dry matter while passing through the drying chamber, and the waste heat passing through the drying chamber is discharged to the outside through the exhaust pipe.

However, since external cold air requires considerable time and excessive fuel consumption to heat the drying chamber to a desired temperature through a heat exchanger, thermal efficiency decreases, and there is increasing interest in a drying apparatus that reuses waste heat discharged from the drying chamber. An apparatus for recycling waste heat and feeding it back to the drying chamber has been developed and applied.

As an example, a Fin-tube multi-stage separate heat exchanger is disclosed in Korean Patent No. 10-1664142 filed and filed by the present applicant (name: drying system of a multi-stage separated heat exchange method).

However, since the waste heat air discharged from the drying chamber is corrosive and contains a large amount of dust containing contaminants, when the waste heat air containing dust passes through the heat exchanger, the waste heat air contains a large amount of heat on the fin-tube heat transfer surface. Of dust is attached, which can drastically lower the heat efficiency of the heat exchanger and cause fouling, which corrodes the heat transfer surface of the heat exchanger tube. Therefore, the heat efficiency of the heat exchanger is significantly reduced and the life of the heat exchanger is greatly increased. There is a big problem of being shortened.

Conventionally, for the purpose of removing dust, the worker has dismantled, cleaned and reassembled the device to clean the heat exchanger. There is a problem that the work production efficiency is reduced.

Republic of Korea Patent Publication No. 10-1664142 (2016.10.4 registration) Republic of Korea Patent Publication No. 2012-0070958 (2012.7.2 published) Korean Unexamined Patent Publication No. 2007-0034446

The present invention has been made in order to solve the above-mentioned conventional problems, it is possible to effectively remove the dust (dust) attached to the heat medium circulation tube inside the heat exchange block to prevent fouling (fouling) phenomenon to corrode the heat transfer surface. It is an object of the present invention to provide a drying system of a multi-stage separated heat exchange method that can be prevented and provided with a cleaning device that can improve the thermal efficiency and durability of a heat exchanger.

According to an aspect of the present invention, a heat exchanger for recovering heat from a high temperature and high humidity of the first air discharged from the dryer and heat exchanged with the low-temperature dry second air of the outside air, and discharged from the heat exchanger; A heating furnace for heating the second air, a blowing fan for supplying the first air discharged from the dryer to the heat exchanger, and then discharging it to the outside through the heating furnace A drying system including a blowing fan to supply to the dryer, wherein the heat exchange device, the first air discharged from the dryer flows in from one side and exits from the other side, the heat medium to heat exchange with the first air therein front and rear A plurality of first heat exchange blocks are installed at regular intervals so that the first heat medium circulation tube is installed to circulate in the width direction. A first main body between each of the first heat exchanging blocks, the first main body having an empty first vortex generating block installed therein so as to convert the flow of the first air passing through the first heat exchanging block into a vortex, and to clean the first heat exchanging block. A multistage separate heat exchange type drying system having a cleaning device including a cleaning device disposed at least partially adjacent to the first heat exchange block is provided.

The cleaning device is arranged to be adjacent to the first heat exchanger block located at the forefront to clean the surface of the first heat medium circulation tube of the first heat exchanger block at the foremost side into which the first air flows. It may be provided inside the first vortex generating block.

The washing apparatus includes a plurality of branch pipes each branched from a main pipe connected to a washing water pump provided outside the heat exchanger and provided with a plurality of washing water spray nozzles, and washing water to the plurality of branch pipes. A plurality of branch pipes may be provided in the plurality of branch pipes to selectively control the supply, and a control unit may be provided to control the opening and closing of the washing water control valve to control the supply of the washing water to the branch pipes.

The plurality of branch pipes may be provided to be spaced apart from each other along a height direction with respect to the installation bottom surface of the first heat exchange block.

The control unit controls the washing water control valve so that washing water spraying from the upper branch pipe and the lower branch pipe is sequentially performed with a predetermined time difference, without being simultaneously spraying the washing water through a plurality of branch pipes. Can be controlled.

The heat exchange device further includes a collecting plate for collecting the washing water for cleaning the surface of the first heat medium circulation tube, wherein the collecting plate is connected to a drain pipe for discharging the washing water outside, and the collecting plate is connected to the drain pipe. The bottom surface may be inclined downward.

The washing apparatus further includes a feedback unit for feeding back the washing water discharged to the drain pipe to a washing water tank for supplying washing water, wherein the feedback unit is provided on a feedback pipe connecting the drain pipe and the washing water tank. A feedback pump provided; And a water filter provided on the drain pipe and the feedback pipe on the feedback pump to filter foreign substances.

According to the drying system of the multi-stage separation heat exchange method provided with the washing | cleaning apparatus of this invention demonstrated above, a heat exchanger is provided by providing a washing | cleaning apparatus in a heat exchange apparatus in order to remove the dust etc. which adhered to the heat medium fin-tube of a heat exchange block. It is possible to quickly remove dust and the like without disassembly and reassembly of the machine, and thus, it is possible to significantly reduce the work interruption time as compared to the conventional method, thereby increasing work production efficiency.

In addition, since the entire heat exchange block has a predetermined height or more, when the washing water is sprayed simultaneously toward the heat medium circulation tube of the entire heat exchange block, it is not easy to clean the same / similar water pressure. By spraying zones sequentially from top to bottom without spraying water simultaneously, it is possible to spray water with sufficient water pressure even when the capacity of the wash water tank in which the wash water is stored is small, thereby compacting the whole system. Can be implemented.

In addition, since the washing water collected after the washing operation can be filtered and fed back to the washing water tank, there is an advantage in terms of resource recycling.

In addition, the bottom surface of the collecting plate is inclined downward so as to be concentrated toward the drain pipe, so that rapid drainage can be performed, thereby further reducing the waiting time for reactivation of the heat exchanger.

1 is a view schematically showing a drying system of a multi-stage separated heat exchange method having a washing apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a main part of FIG. 1. FIG.
3 is a side view of FIG. 2.
4 is a main configuration diagram of a heat exchanger of a drying system of a multi-stage separate heat exchanger having a washing apparatus according to an embodiment of the present invention.
5 is a view schematically showing a state in which a cleaning device is installed in a heat exchange device of a drying system of a multi-stage separate heat exchange type having a cleaning device according to an embodiment of the present invention.
6 is a perspective view schematically showing a washing apparatus of a drying system of a multi-stage separate heat exchange type including a washing apparatus according to an embodiment of the present invention.
7 is a view showing a state in which the collecting plate is installed on the bottom of the heat exchanger of the drying system of the multi-stage separated heat exchanger having a washing apparatus according to an embodiment of the present invention.
FIG. 8 is a view showing the collecting plate of FIG. 7, wherein (a) is a perspective view, (b) is a side cross-sectional view, and (c) is a rear view.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you. Like numbers refer to like elements in the figures.

The drying system of the multi-stage separation heat exchange method (hereinafter, referred to as a "drying system") provided with a cleaning apparatus according to a preferred embodiment of the present invention is a heat exchanger for removing fouling which causes a decrease in heat exchange efficiency of the device when the heat exchanger is operated. It can be carried out without any disassembly or reassembly, so it can reduce the labor of workers and improve the overall work productivity. Specifically, the heat exchanger tube in which the heat medium circulates is provided in a zigzag form in the heat exchanger. It is possible to facilitate the tube surface cleaning operation.

In addition, the present invention, by performing the sequential to the zones along the height direction of the heat exchanger without simultaneously performing the spraying of the washing water, it is possible to cause a sufficient washing effect even if the tank in which the washing water required for washing is not large capacity, Therefore, the entire system can be made compact and not large.

Hereinafter, the present invention will be described in detail with reference to Examples.

1 to 6, the drying system 10 according to an embodiment of the present invention, the dryer 100, the heating furnace 200, the first main body 300 and the second main body 400 It includes a heat exchange device 900, the main controller 1000 and the cleaning device 1000 to include.

After the cool air from the outside air flows into the inside of the heating furnace 200 through the blower fan 220, the heating furnace 200 heats the introduced air to a constant temperature. At this time, the external cold air is partially heated by the heat exchanger 900 and is supplied to the heating furnace 200.

The heating air of the heating furnace 200 is introduced into the dryer 100 through the supply line 210 by the operation of the blower fan 220, and the dryer 100 is provided with a drying chamber therein to dry the agricultural and marine products. The object is dried at a constant rate.

In addition, warm air (hereinafter referred to as 'first air') of waste heat discharged from the dryer 100 is introduced into the heat exchange device 900 through the discharge line 110. The heat exchanger 900 recovers heat from the warm first air and heats it to supply the cold air (hereinafter referred to as 'second air') of the outside air, and then discharges it through the exhaust fan 330.

That is, since the waste heat air discharged from the dryer 100 cannot be used directly because the humidity is high, the heat exchanger 900 recovers heat from the waste heat discharged from the drying chamber to supply heat to the cold and dry air of the outside air. To discharge.

1 to 5, the heat exchange apparatus 900 is a first warm air of the waste heat discharged from the dryer 100 is introduced into the inlet 310 of one side (left) and the outlet 320 of the other side (right) The first body 300 and the heat medium circulates through the inside, and is installed on the upper portion of the first body 300, the second air that is cold air from the other side (right side) to the inlet 410 It is introduced through the second body 400, the first body 300 and the second body 400, the heat medium is circulated inside and exited to the outlet (420) of one side (left) to provide a heat medium circulation path The heat medium connection pipe 530 and the heat medium circulation pipe 510, the heat medium circulation pump 500 for circulating the heat medium inside the first body 300 and the second body 400 and the cleaning liquid injection unit 600 .

The heat exchanger 900 is installed so as to be partitioned into the lower first body 300 and the upper second body 400, the first air of hot air is discharged through the first body 300, the external The second air passes through the second main body 400 such that the flow directions of the first air and the second air are opposite to each other.

The heat exchange between the first air and the second air is made by a heat medium, and the heat medium of the first body 300 flows into the first body 300 while circulating in the front and rear width directions of the first body 300. After the heat exchange with the first air, it is introduced into the second body 400 through the heat medium connecting pipe 530. The heat medium flowing into the second main body 400 circulates in the front and rear width direction of the second main body 400, and then heat-exchanges with the second air introduced into the second main body 400, thereby heating the heat medium circulating pipe 510. Through the first body 300 is introduced again. As described above, the heat medium absorbs heat from the warm first air flowing into the first main body 300 by circulating the first main body 300 and then flows into the second main body 400, and the second main body 400. The heat medium is introduced into the cold second air to supply heat.

A plurality of first heat exchange blocks 700 of the first body 300 are installed at regular intervals, and a plurality of second heat exchange blocks 800 of the second body 400 are also installed at regular intervals. The upper and lower first and second heat exchange blocks 700 and 800 corresponding to each other exchange heat medium. In addition, the first and second heat exchange blocks 700 and 800 installed in the upper and lower portions are thermally heated to each other through heat medium circulation tubes 726 and 826 which are arranged in multiple rows and multiple stages and circulate with the heat medium. Will be exchanged.

Meanwhile, first and second vortex generation locks 750 and 850 are installed between the first and second heat exchange blocks 700 and 800, respectively. Each of the first and second vortex generating blocks 750 and 850 is formed into an empty space to convert the flow of the first and second air passing through the first and second heat exchange blocks 700 and 800 into vortices. That is, the air passing through the first and second heat exchange blocks 700 and 800 has a substantially laminar flow by the first and second heat medium circulation tubes 726 and 826, and the first and second vortex generating blocks 750 and 850 in the empty space. It is converted into vortex as it flows in. Therefore, the flow rate of the air is lowered and the heat transfer time of the air is increased, and the waste air and the outside air are uniformly mixed and have a uniform temperature distribution, thereby increasing the thermal efficiency of the heat exchanger device.

3 to 6, at least a part of the first heat exchanger is used to clean the surface of the first heat exchange block 700 of the first body 300, specifically, the first heat medium circulation tube 726. The apparatus 1000 further includes a cleaning apparatus 1000 disposed to be adjacent to the block 700.

The cleaning apparatus 1000 may effectively remove dust (dust), etc. attached to the inside of the heat exchange block, to prevent fouling phenomenon that corrodes the heat transfer surface of the heat medium circulation tube. It is possible to extend the service life significantly while improving the thermal efficiency. The cleaning device 1000 may be driven in a stopped state of the heat exchanger.

In other words, more than a predetermined amount of agricultural and marine products are loaded into the dryer 100, and the agricultural and marine products are dried by hot air, which inevitably generates more than a certain amount of dust inside the dryer. The dryer 100 is connected to the first body 300 through a pipe, and the first air including dust generated inside the dryer is introduced into the first body 300 through the pipe. When the drying operation is repeated a plurality of times for a long time and the first air in the dryer is introduced into the first main body 300 for a long time, dust is attached to the first heat exchange block 700 of the first main body 300 and such dust By attachment, the heat exchange efficiency drops considerably.

In the present invention, the cleaning apparatus 1000 can prevent the fouling phenomenon in advance by intensively cleaning the heat exchange block, in which dust may be attached, especially among the plurality of heat exchange blocks.

Specifically, as shown in FIG. 5, the cleaning apparatus 1000 includes a first heat medium circulation tube of the first heat exchange block 700 on the foremost side into which the first air flows from among the plurality of first heat exchange blocks 700. 726 may be provided inside the first vortex generating block 750 disposed to be adjacent to the first heat exchange block 700 located at the forefront to clean the surface.

Here, the cleaning device 1000 has a state in which the first vortex generating block 750 is fixedly installed, and the operator can quickly clean the heat exchanger without disassembling and reassembling the heat exchanger block.

On the other hand, in the present invention, as described above, the cleaning device 1000 is the frontmost agent to which a relatively large amount of dust is attached among the plurality of first heat exchange block 700 inside the first body 300 into which the first air is introduced Intensive cleaning of the first heat exchange block 700, and part of the inside of the first vortex generating block 750, which is empty, can cause a sufficient cleaning effect without expanding the size of the entire apparatus and compact the entire apparatus. Can be implemented.

As shown in FIGS. 5 and 6, the washing apparatus 1000 is branched from the main pipe 1200 connected to the washing water pump 1100 provided outside the heat exchanger 900, respectively, and sprays a plurality of washing water. It includes a plurality of branch pipes 1400, the nozzle 1300 is installed, and the outer frame 1500 surrounding the plurality of branch pipes 1400 in the circumferential direction. The washing water is applicable to water, washing liquid and the like. 6, the inner configuration including the outer frame 1500 is disposed in the vortex generating block 700 inside the heat exchange device 900.

The washing water pump 1100 is connected to the washing water storage tank 1600 in which the washing water is stored and is connected to a pipe to suck the washing water and supply the washing water to the plurality of washing water injection nozzles 1300.

In the present invention, the plurality of branch pipes 1400 are provided with a washing water control valve 1700, respectively, to selectively control the supply of the washing water to the plurality of branch pipes 1400, and the washing water control valve 1700 is opened. The controller (not shown) is provided to control the blocking to control the supply of the washing water to the branch pipe 1400. Here, the washing water control valve 1700 may be applied as a solenoid valve that can be controlled on and off by an electrical signal.

The present invention, rather than simultaneously washing the entire first heat exchange block 700, specifically the first heat medium circulation tube 726, the first air flows to be performed from the upper side to the lower side sequentially. . Therefore, even if the washing water storage tank 1600 is not a large-capacity tank, sufficient washing water can be supplied to the washing water injection nozzles 1300 of the plurality of branch pipes 1400, and the apparatus can be made compact.

In addition, according to the present invention, by selecting the branch pipe 1400 of the plurality of branch pipes 1400 so that the washing water is sprayed sequentially, the washing water is sprayed while maintaining a predetermined or more washing water spray pressure. . In other words, when the washing water is sprayed simultaneously through the plurality of branch pipes 1400 in the state in which the capacity of the washing water pump 1100 is preset, the injection pressure may decrease, but the sequential washing water spraying method is applied as in the present invention. In this case, the drop of the injection pressure can be prevented to a certain degree, thereby preventing the efficiency of the cleaning operation from falling.

To this end, the plurality of branch pipes 1400 are preferably provided to be spaced apart from each other along the height direction with respect to the installation bottom surface of the first heat exchange block 700, the control unit (not shown) is a plurality of branch pipes (1400) Supplying the washing water to the sequential progress.

The control unit is a washing water control valve so that the washing water injection through the plurality of branch pipes 1400 is not performed at the same time, and the washing water injection from the branch pipe located at the upper side is sequentially performed with a set time difference. Control 1700. In the related drawings, three branch pipes 1400 are shown, but the present invention is not limited thereto. However, the three branch pipes 1400 will be described based on three for convenience of description.

Specifically, first, the controller operates the washing water pump 1100 to supply the washing water, and the main valve 1800 provided on the pipe connecting the branch pipe 1400 and the washing water pump 1100 has an open state. . The main valve 1800 may be applied as a ball valve that can be manually operated by an operator or a solenoid valve that can be controlled on and off by an electrical signal.

Next, the control unit opens the first washing water control valve 1710 connected to the first branch pipe 1410 positioned at the uppermost portion to perform the washing water spraying operation through the nozzle, and the washing water is discharged through the nozzle. 1 is injected forward toward the heat exchange block 700. The control unit turns off the first washing water control valve 1710 after the washing water spraying operation is performed for a predetermined time. At this time, the second washing water control valve 1720 and the third washing water control valve 1730 also have an off state.

Next, the control unit opens the second washing water control valve 1720 connected to the second branch pipe 1420 located about 1 to 2 seconds after the washing water spraying operation in the first branch pipe 1410 is stopped. Open to allow washing water to be sprayed through the nozzle. The control unit turns off the second washing water control valve 1720 after the washing water spraying operation is performed for a predetermined time. At this time, the first washing water control valve 1710 and the third washing water control valve 1730 also have an off state.

Subsequently, the control unit opens the third washing water control valve 1730 connected to the third branch pipe 1430 positioned approximately 1 to 2 seconds after the washing water spraying operation in the second branch pipe 1420 is stopped. Open to allow washing water to be sprayed through the nozzle. The control unit turns off the third washing water control valve 1730 after the washing water spraying operation is performed for a predetermined time. At this time, the first washing water control valve 1710 and the second washing water control valve 1720 also have an off state.

The control unit may be repeatedly performed a plurality of times using the three-stage injection process as one cycle.

As described above, according to the present invention, by sequentially performing the multi-stage washing water spraying operation from the upper side to the lower side, the washing water sprayed when the washing water is sprayed through the uppermost nozzle is dust on the surface of the heat medium circulation tube on the corresponding spraying area in front. In addition to the removal of (dust), it moves downward along the surface of the heat medium circulation tube and provides water to dust, which is fixed on the surface of the heat medium circulation tube located at the lower side, in advance, thereby spraying the second washing water in the next step. Also, when the washing water spraying operation is sequentially performed through the nozzle 1300 and the third washing water spraying nozzle 1300, there is also an advantage that the fixed dust and the like are more easily removed.

On the other hand, after the cleaning device 1000 is operated, the washing water remains on the bottom surface of the heat exchanger 900. However, when such washing water cannot be discharged quickly, it is inconvenient in terms of work efficiency such as time delay for reactivation of the heat exchanger. A dot will occur.

The present invention employs a discharge structure for draining the washing water remaining at the bottom of the heat exchange device 900 more quickly.

As shown in FIG. 7, the heat exchanger 900 further includes a collecting plate 2000 for collecting the washing water that has washed the surface of the first heat medium circulation tube 726, and the collecting plate 2000 has an outside of the washing water. A drain pipe 2100 for discharging is connected.

The collecting plate 2000 is provided such that the bottom surface is inclined downward toward the drain pipe 2100 to enable rapid discharge of the washing water.

Specifically, as shown in FIG. 8 (b), when viewed from the side, the bottom surface of the collecting plate 2000 is inclined downward toward the drain pipe 2100, and as shown in FIG. When viewed from the rear surface of the collecting plate 2000 is also inclined to face the drain pipe 2100. This structure can induce a rapid external discharge of the rinsing water and improve the work productivity by reducing the delay time of reactivation of the heat exchanger.

In the present invention, as shown in Figure 7, the washing apparatus 1000, the feedback unit 1900 for feeding back the washing water discharged to the drain pipe 2100 to the washing water storage tank 1600 for supplying the washing water It further includes. Through the feedback unit 1900, since the washing water after washing can be recycled again, an advantage occurs in terms of recycling resources. As the washing operation is performed repeatedly for a long time and the washing water is recycled, the recycling value can be seen to increase.

The feedback unit 1900 is provided on the feedback pump 1920, the drain pipe 2100, and the feedback pump 1920 provided on the feedback pipe 1910 connecting the drain pipe 2100 and the washing water storage tank 1600. The water purification filter 1930 is provided on the feedback pipe 1910 to filter foreign matter. The water filter 1930 is mounted on the feedback pipe 1910 to facilitate replacement, and the worker may periodically replace it to prevent the filtering efficiency from being reduced.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the following claims.

10: drying system 100: dryer
110: discharge line 200: heating furnace
210: supply line 300: first body
310,410: inlet 320,420: outlet
400: second body 500: heat medium circulation pump
510: heat medium circulation tube 530: heat medium connector
700: first heat exchange block 800: second heat exchange block
726,826: 1st, 2nd heating medium circulation tube
900: heat exchanger 100: cleaning device
1100: washing water pump 1300: washing water spray nozzle
1400: branch piping 1600: washing water storage tank
1700: washing water control valve 1900: feedback unit
1910: feedback piping 1920: feedback pump
1930: water filter 2000: collecting plate
2100: drain pipe

Claims (6)

A heat exchanger that recovers heat from the first hot and humid air discharged from the dryer and heat-exchanges with the low-temperature dry second air of the outside air, and then heats the second air discharged from the heat exchanger. And a blower fan for supplying the first air discharged from the dryer to the heat exchanger and then discharging it to the outside, and a blower fan for supplying the second air discharged from the heat exchanger to the dryer through the heating furnace. As a drying system comprising:
The heat exchanger,
The first heat exchange block in which the first heat medium is discharged from the dryer flows from one side and exits from the other side, and the first heat medium circulation tube is installed to circulate in the front and rear width direction for the heat medium to heat exchange with the first air therein is a predetermined interval It is provided with a plurality, and between the first heat exchange block includes a first main body is provided with a first vortex generating block is empty inside to convert the flow of the first air passing through the first heat exchange block into a vortex ,
A cleaning device disposed at least partially adjacent to the first heat exchange block to clean the first heat exchange block,
The cleaning device,
A first vortex generation is disposed to be adjacent to the first heat exchange block located in the foremost position to clean the surface of the first heat medium circulation tube of the first heat exchange block on the foremost side of the first heat exchange block of the plurality of first heat exchange block Drying system of the multi-stage separation heat exchange method having a cleaning device, characterized in that provided in the block. The method of claim 1,
The washing apparatus includes a plurality of branch pipes each branched from a main pipe connected to a washing water pump provided outside the heat exchanger, and a plurality of washing water spray nozzles are installed.
Each of the plurality of branch pipes is provided with a washing water control valve to selectively control the supply of the washing water to the plurality of branch pipes, and controls the opening and closing of the washing water control valve to control the supply of the washing water to the branch pipes. Control system is provided so that the multi-stage separation heat exchange type drying system having a cleaning device. The method of claim 2,
And the plurality of branch pipes are spaced apart from each other along a height direction with respect to an installation bottom surface of the first heat exchange block. The method of claim 2,
The control unit,
The washing water control valve is controlled so that the washing water injection is sequentially performed at a predetermined time difference from the branch pipe located at the upper side and the washing water spraying at the lower branch pipe, rather than the spraying of the washing water through the plurality of branch pipes. The drying system of the multistage separation heat exchange system provided with the washing apparatus. The method of claim 2,
The heat exchange device further includes a collecting plate for collecting the washing water for washing the surface of the first heat medium circulation tube,
A drain pipe for draining the washing water outside is connected to the water collecting plate, and the water collecting plate has a washing device characterized in that the bottom surface is inclined downward toward the drain pipe. The method of claim 5,
The washing apparatus further includes a feedback unit for feeding back the washing water discharged to the drain pipe to the washing water tank for washing water supply.
The feedback unit,
A feedback pump provided on a feedback pipe connecting the drain pipe and the washing water tank; And
And a water purifying filter provided on the drain pipe and the feedback pipe on the feedback pump to filter foreign substances.

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