KR101126786B1 - Automatic cleaning system for plate type heat exchangers - Google Patents

Abstract

The present invention relates to an automatic cleaning device for a plate heat exchanger, and more particularly, by applying a fluid flow control technology, fluid vibration generation technology, air bubble generation and injection technology, without disassembling assembly of the heat exchanger or input of chemicals, The present invention relates to an automatic cleaning device for a plate heat exchanger that can remove contaminants that are automatically attached to the plate heat exchanger at regular intervals and intervals even during operation.

In the automatic cleaning device for a plate heat exchanger, the fluid inlet provided in the plate heat exchanger is characterized in that the air bubble generation and distribution device for generating and introducing air bubbles into the fluid supplied to the plate heat exchanger is installed.

Plate, Heat Exchanger, Automatic Cleaning, Air Bubble, Pulsation, Flow Control, Ozone

Description

Automatic cleaning system for plate type heat exchangers}

The present invention relates to an automatic cleaning device for a plate heat exchanger, and more particularly, by applying a fluid flow control technology, fluid vibration generation technology, air bubble generation and injection technology, without disassembling assembly of the heat exchanger or input of chemicals, The present invention relates to an automatic cleaning device for a plate heat exchanger that can remove contaminants that are automatically attached to the plate heat exchanger at regular intervals and intervals even during operation.

 In general, various types of heat exchangers have been developed with different structures depending on the purpose of use, installation conditions, and fluid types, but the most commonly used heat exchangers are shell & tube and plate heat exchangers. .

Heat exchange performance of these heat exchangers decreases with use time. The main cause of the decrease in performance is contamination of heat exchanger heat pipes or heat transfer plates. By decomposing, the contaminants were manually cleaned with a brush or a cloth or immersed in chemicals for cleaning.

However, such a cleaning method has to stop the operation of the device during cleaning, so in the case of industrial use, it is necessary to interrupt or replace the product process, and it is inconvenient to disassemble the heat exchanger to clean and reassemble the heat exchanger, in particular, using chemicals. There is a risk of environmental pollution.

In addition, the heat transfer efficiency is maintained at the initial stage after the manual operation or chemical cleaning operation, but if the pollution source accumulates over time, the heat transfer efficiency is deteriorated sharply, there is a problem for the inconvenience or environmental pollution caused by the manual operation There is a need for an automatic decontamination device that can solve and continuously maintain high heat transfer efficiency.

By the way, in general, the tubular heat exchanger among the commonly used multi-tube heat exchanger and plate heat exchanger has been developed and spread to the sponge ball to pass through the tube to clean, but the plate heat exchanger to the device that can automatically clean The development is not done properly.

Recently, the use of plate heat exchangers in various industrial cooling devices, heavy chemical plants, pulp paper, semiconductors, ships, etc., where energy consumption is high, is rapidly increasing, and energy saving and environmental issues are becoming important issues these days. There is an urgent need for the development of automatic cleaning devices for machines.

In the conventional technology for the cleaning device of the plate heat exchanger, Korean Patent Publication No. 10-0894982 discloses a plate heat exchanger cleaning system, the main technical configuration of which is shown in FIG. Washing water storage tank for receiving and storing chemicals, washing water supply device for pumping the washing water of the washing water storage tank, compressed air supply device for generating and supplying compressed air, washing water inlet device for mixing out the washing water and compressed air, the plate heat exchange And a washing water outlet device for recovering the washing water discharged from the air to the washing water storage tank, wherein the washing water inlet device includes an atomizing nozzle having a washing water inlet, a compressed air inlet, and a washing water outlet, and the washing water supply device and the atomizing nozzle. Washing water inlet, phase with the compressed air supply The compressed air inlet of the atomization nozzle, the washing water outlet and the washing water storage tank are connected to each other through the forward washing pipes, the washing water is injected into the washing water inlet and compressed air is injected into the compressed air inlet, The washing water and the compressed air are mixed with each other to be converted into a particulate state, and are discharged to the washing water discharge port. The washing water in the particulate state provided from the outlet side pipe of the washing water inlet device is injected into the plate heat exchanger and washed. It is done.

However, the configuration as described above had to stop the work to clean the heat exchanger and to perform a separate cleaning work.

In addition, the configuration has a problem that can cause environmental pollution when used for a long time because the use of a separate chemical for cleaning the plate heat exchanger.

The present invention has been made to solve the above problems, the object of the present invention is to apply the flow control technology, fluid vibration generation technology, air bubble generation and injection technology of the heat dissipation and assembly of the heat exchanger Without this, to provide an automatic cleaning device for a plate heat exchanger that can remove the contaminants that are automatically attached to the plate heat exchanger at regular intervals and intervals even during operation of the device.

In addition, the present invention improves the operation efficiency of various industrial cooling devices, heavy chemical plants, pulp paper, semiconductors, ships, etc., which are recently consumed with high energy consumption, and improves the operation efficiency without adversely affecting the environment. Another object is to provide an automatic cleaning device for a plate heat exchanger that can eliminate the inconvenience caused by.

The present invention for achieving the above objects,

In the automatic cleaning device for a plate heat exchanger, the fluid inlet provided in the plate heat exchanger is characterized in that the air bubble generation and distribution device for generating and introducing air bubbles into the fluid supplied to the plate heat exchanger is installed.

At this time, the air bubble generation and distribution device, the air bubble supply nozzle is connected to the plate heat exchanger through the fluid inlet provided in the plate heat exchanger; An air compressor installed at an end of the air bubble supply nozzle to supply air bubbles into the plate heat exchanger; It characterized in that it comprises a regulator for adjusting the amount of air bubbles generated from the air compressor and a plurality of distribution heads for distributing air bubbles from the air bubble supply nozzle to the hot plate of the plate heat exchanger.

In addition, the air bubble generation and distribution device is characterized in that it further comprises an ozone generator is connected to the air bubble supply nozzle.

And, the fluid outlet provided in the plate heat exchanger is characterized in that the air separation device for separating the air present in the fluid used for heat exchange is connected.

In this case, the air separation device comprises a first air separation device for separating the air present in the phase separated from the fluid in the fluid used for heat exchange, and a second air separation device for separating the air dissolved in the fluid It is characterized by.

In addition, the first and second air separation device is characterized in that the air discharge valve for discharging the separated air to the outside, respectively installed.

On the other hand, between the fluid inlet for injecting the heat exchange fluid to the plate heat exchanger and the plate heat exchanger is characterized in that the fluid pulsation generating device for generating turbulence in the fluid flowing into the plate heat exchanger is installed.

In this case, the fluid pulsation generating device comprises a fluid drive pump for generating a pulsation in the fluid flowing into the plate heat exchanger, and the first and second control valves connected to the front and rear of the fluid drive pump, respectively, It features.

The fluid pulsation generating device may further include a control panel configured to control on / off and linear opening and closing of the first and second control valves.

In addition, the fluid inlet for injecting and discharging the heat exchange fluid in the plate heat exchanger and the fluid flow control device is connected between the fluid discharge portion and the plate heat exchanger to change the flow direction of the fluid by switching the flow path It is done.

In addition, the fluid flow control device is a first and second three-way valve for switching the flow path to change the flow direction of the fluid, and the first and second drive connected to the first and second three-way valve respectively Characterized in that it comprises a motor.

According to the automatic cleaning device for a plate heat exchanger according to the present invention, a contaminant present in a plate heat exchanger by applying fluid flow control technology, fluid vibration generation technology, air bubble generation and injection technology alone or simultaneously with the above three techniques. By maximizing the removal of the plate heat exchanger has an excellent effect to improve the operating efficiency.

In addition, according to the present invention further has the effect of automatically removing the pollutants in a certain time and a certain period without interruption of the heat exchanger.

In addition, according to the present invention, there is no input of a separate chemical material for cleaning the heat exchanger, so it is environmentally friendly, and it is possible to maintain a constant heat transfer efficiency.

According to the present invention, the present invention can be directly applied to existing equipment or new equipment of plate type heat exchanger which is rapidly being applied to various industrial cooling devices, heavy chemical plants, pulp paper, semiconductors, ships, etc. Additionally has an excellent effect.

Hereinafter, with reference to the accompanying drawings will be described in detail preferred embodiments of the automatic cleaning device for a plate heat exchanger according to the present invention.

Figure 2 is a schematic view showing a schematic view of an automatic cleaning device for a plate heat exchanger according to the present invention, Figure 3 is a configuration diagram showing in detail the air bubble generation and distribution device of the present invention shown in Figure 2, Figure 4 (a ), (b) is a view showing in detail the operational relationship between the air bubble generation and distribution device of the present invention shown in Figure 2, Figure 5 is a configuration diagram showing in detail the air separation device of the present invention shown in Figure 2, 6 is a configuration diagram showing in detail a fluid pulsation generating device of the present invention shown in Figure 2, Figure 7 is a configuration diagram showing a fluid flow control device of the present invention shown in FIG.

The present invention is applied to the plate heat exchanger automatically at regular intervals and intervals even during the operation of the device without disassembling or assembling the heat exchanger or applying chemicals by applying a fluid flow control technology, a fluid vibration generating technology, air bubble generation and injection technology. It relates to an automatic cleaning device for a plate heat exchanger that can remove the contaminants attached to the 100, the configuration is largely air bubbles generated in the fluid inlet 110 provided in the plate heat exchanger 100 and the distribution device (200) ) Is installed to be connected.

In more detail, the general plate heat exchanger 100 has a fluid inlet 110 and a fluid outlet 120, as shown in FIG. 2, where hot water flows on the left side and low temperature on the right side. The water flows. Therefore, the fluid inlet 110 is composed of a cold water inlet 111 provided at the lower right and the hot water inlet 112 provided at the upper left, the fluid outlet 120 is a cold water provided at the upper right. It consists of an outlet 121 and the hot water outlet 122 provided at the lower left.

In the plate heat exchanger 100, a plurality of hot plates 130 through which pipes connected to the fluid inlet 110 and the fluid outlet 120 are installed are arranged in a line, and the frame 140 for fixing the hot plates 130 is provided. ) Is installed.

The hot water of the plate heat exchanger 100 radiates heat to the hot plate 130 at a boundary, and the low temperature water is a continuous process of hydrothermally transferring the hot water and the cold water to each other. The left hot water portion of the plate heat exchanger 100 is connected to the process system, and the surface of the flow path formed on the hot plate 130 on the left side is generally in good condition due to excellent water quality management, but the cold water portion on the right side introduces supplemental water. And scale pollution is severely generated by atmospheric heat radiation and the like.

Therefore, the automatic cleaning device for a plate heat exchanger according to the present invention is installed by connecting the air bubble generation and distribution device 200 in the fluid inlet 110, in particular, the low temperature water inlet 111 provided in the plate heat exchanger (100) It is configured to effectively remove contaminants attached to the hot plate 130 of the plate heat exchanger 100 by generating air bubbles uniformly in the fluid supplied to the heat exchanger 100.

More specifically, the air bubble generating and distributing apparatus 200 may include an air bubble supply nozzle 210, an air compressor 220, a regulator 230, and a plurality of dispensing heads, as shown in FIGS. 3 and 4. It is configured to include a 240, the air bubble supply nozzle 210 is connected to the plate heat exchanger 100 is installed through the fluid inlet 110 of the plate heat exchanger 100 is air to the fluid supplied for heat exchange The air compressor 220 is installed at one end of the air bubble supply nozzle 210 and sprays compressed air to generate air bubbles into the plate heat exchanger 100. To make it possible.

In addition, the regulator 230 is connected to the front of the air compressor 220 is installed to adjust the amount of air bubbles generated by the air compressor 220, and serves to maintain a proper level or more, the distribution head 240 is coupled to the outer circumferential surface of the air bubble supply nozzle 210 serves to distribute the air bubbles introduced through the air bubble supply nozzle 210 to each of the hot plates 130.

That is, as shown in (b) of FIG. 4, the air bubble generating and distributing apparatus 200 having the above-described configuration may be provided by introducing air bubbles into the respective hot plates 130 provided in the plate heat exchanger 100. The fluid used in the heat exchange forms turbulent flow to remove contaminants attached to the hot plate 130 primarily, and at the same time, when the air bubbles hit the wall of the contaminant or the hot plate 130 in the fluid and burst or separate, The surrounding water is rapidly gathered into the space occupied so that the pollutants attached to the hot plate 130 can be removed by the pressure fluctuation that occurs momentarily.

In this case, an ozone generator 250 may be additionally installed in the air bubble generating and distributing apparatus 200. The ozone generator 250 is connected to the air bubble supply nozzle 210 and is generated from the air compressor 220. By injecting ozone in parallel with the air bubbles to serve to maximize the cleaning effect of the plate heat exchanger (100).

Meanwhile, an air separator 300 is connected to the fluid outlet 120 of the plate heat exchanger 100, particularly the cold water outlet 121, and the air separator 300 is discharged after being used for heat exchange. The air contained in the fluid is to be separated from the fluid before the heat-exchanged fluid is supplied to the place of use such as a radiator or a cooling tower through the fluid discharge unit 160.

In more detail, as shown in FIG. 5, the air separation device 300 includes a first air separation device 310 and a second air separation device 320, wherein the first air separation device ( 310 is installed to be connected to the fluid outlet 120 of the plate heat exchanger 100 to remove the air present in the phase separated from the fluid in the fluid flowing out after heat exchange, the density consisting of a container in the form of an expansion tank It is configured to separate air using a car.

In addition, the second air separation device 320 is connected between the first air separation device 310 and the fluid discharge unit 160 to remove the air dissolved in the fluid, dissolved in a liquid According to Henry's law that the weight of a given gas is proportional to the gas pressure, the pressure difference is used to separate the dissolved air in the fluid.

Therefore, it is possible to completely remove the air contained in the fluid used for the heat exchange by using the first and second air separation device (310, 320), the first and second air separation device (310) ( 320, the air discharge valve 330 is connected to each other is configured to discharge the separated air to the outside.

In addition, as shown in FIG. 5, the second air separation device 320 is connected to a pipe branched separately from a pipe connected between the fluid outlet 120 and the fluid discharge part 160 of the plate heat exchanger 100. It may be configured to be selectively used by installing, between the first air separation device 310 and the second air separation device 320 and between the second air separation device 320 and the fluid discharge unit 160. Respectively, the first and second valves 322 and 324 are installed to adjust the flow of the fluid flowing into the second air separation device 320.

In addition, the pump 326 is connected and installed between the second air separation device 320 and the second valve 324 to smoothly discharge the fluid filtered from the second air separation device 320 to the fluid discharge unit 160. Of course it can also be.

On the other hand, the automatic cleaning device for a plate heat exchanger according to the present invention may be configured to further include a fluid pulsation generating device 400, the fluid pulsation generating device 400 is a pulsation to the fluid flowing into the plate heat exchanger (100) By generating the fluid to form a turbulent flow to be able to more surely remove the contaminants attached to the hot plate 130 of the plate heat exchanger (100).

In more detail, as shown in FIG. 6, the fluid pulsation generating device 400 is provided in the fluid injector 150 and the plate heat exchanger 100 for injecting heat exchange fluid into the plate heat exchanger 100. It is connected between the fluid inlet 110, and comprises a fluid drive pump 410, the first and second control valves 420, 430.

In this case, the fluid drive pump 410 serves to generate pulsation in the fluid flowing into the plate heat exchanger 100 by pumping the fluid injected through the fluid inlet 150. The first and second control valves 420 and 430 are connected to the front and rear of the fluid driving pump 410, respectively, to activate turbulence of the fluid by activating pulsation of the fluid by on / off operation and linear opening and closing. At the same time to facilitate the formation of the fluid to be more smoothly supplied to the inside of the plate heat exchanger (100).

Therefore, the pulsation is generated by the fluid pulsation generating device 400 having the configuration described above is turbulent fluid is supplied to the inside of the plate heat exchanger 100 is attached to the hot plate 130 by vibrating the hot plate 130 Cracks can be generated or removed from contaminants such as scales.

In addition, the fluid pulsation generating device 400 may further comprise a control panel 450, the control panel 450 is the first and the first to adjust the magnitude of the pulsation generated in the fluid as needed It controls the on / off of the two control valves (420, 430) or the linear opening and closing, that is, the amount of opening and closing of the first and second control valves (420, 430).

On the other hand, the automatic cleaning device for a plate heat exchanger according to the present invention may be configured to further include a fluid flow control device 500, the fluid flow control device 500 is a fluid for heat exchange to the plate heat exchanger (100). It is installed between the fluid inlet 150 and the fluid outlet 160 and the plate heat exchanger 100 for injecting and discharging to serve to change the flow direction of the fluid to the right or reverse through the flow path switching will be.

In more detail, the fluid flow control apparatus 500 includes the first and second three-way valves 510 and 520 and the first and second driving motors 512 and 522 as shown in FIGS. 2 and 7. The first three-way valve 510 is one side is connected to the fluid outlet 120, in particular the cold water outlet 121 of the plate heat exchanger 100, the other both sides of the fluid outlet ( 160 or connected to the air separation unit 300 and the fluid inlet unit 150 or the fluid pulsation generating unit 400 to switch the flow path to change the flow direction of the fluid flowing out of the fluid outlet 120 in the forward or reverse direction It has a role to make it possible.

In addition, one side of the second three-way valve 520 is connected to the fluid inlet 110, particularly the low temperature water inlet 110, of the plate heat exchanger 100, and the other two sides are the same as the first three-way valve 510, respectively. Installed in connection with the fluid discharge unit 160 or the air separation unit 300 and the fluid inlet unit 150 or the fluid pulsation generating unit 400 to change the flow direction of the fluid flowing into the fluid inlet 110 to the reverse or reverse It is to play a role of converting the euro to the risk.

In addition, the first and second driving motors 512 and 522 are connected to the first three-way valve 510 and the second three-way valve 520, respectively, so that the first three-way valve 510 and the second three-way valve ( It is to serve to enable the flow of the fluid to be reversed or reversed through the flow path converted by 520.

In this case, as shown in FIG. 2, the first and second driving motors 512 and 522 are connected to and installed in the above-described control panel 450 so as to control the first and second driving motors 512 and 522. Of course, it is also possible to control the reverse operation.

Therefore, according to the automatic cleaning device for a plate heat exchanger according to the present invention, the plate heat exchanger 100 may be applied to the above-described fluid flow control technology, fluid vibration generation technology, air bubble generation and injection technology alone or simultaneously by applying the above three techniques. By maximizing the removal of contaminants present in), not only can the operation efficiency of the plate heat exchanger 100 be improved, but there is no input of chemicals for cleaning the heat exchanger, which is environmentally friendly and heat transfer efficiency. It is also excellent in terms of energy saving because it can be kept constant, and has various advantages, such as being able to automatically remove contaminants in a certain time and a certain period without stopping the heat exchanger.

Although the above embodiments have been described with respect to the most preferred examples of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

The present invention relates to an automatic cleaning device for a plate heat exchanger, and more particularly, by applying a fluid flow control technology, fluid vibration generation technology, air bubble generation and injection technology, without disassembling assembly of the heat exchanger or input of chemicals, The present invention relates to an automatic cleaning device for a plate heat exchanger that can remove contaminants that are automatically attached to the plate heat exchanger at regular intervals and intervals even during operation.

1 is a schematic view showing a conventional plate heat exchanger cleaning system as a whole.

Figure 2 is a schematic view showing a schematic view of an automatic cleaning device for a plate heat exchanger according to the present invention.

3 is a configuration diagram showing in detail the air bubble generation and distribution device of the present invention shown in FIG.

Figure 4 (a), (b) is a view showing in detail the operational relationship between the air bubble generation and distribution device of the present invention shown in FIG.

5 is a configuration diagram showing in detail the air separation apparatus of the present invention shown in FIG.

6 is a configuration diagram showing in detail the fluid pulsation generating device of the present invention shown in FIG.

7 is a configuration diagram showing in detail the fluid flow control apparatus of the present invention shown in FIG.

Explanation of symbols on the main parts of the drawings

100: plate heat exchanger 110: fluid inlet

111: cold water inlet 112: hot water inlet

120: fluid outlet 121: cold water outlet

122: low temperature water outlet 130: hot plate

140: frame 150: fluid inlet

160: fluid outlet 200: air bubble generation and distribution device

210: air bubble supply nozzle 220: air compressor

230: regulator 240: distribution head

250: ozone generator 300: air separation device

310: first air separation device 320: second air separation device

322: first valve 324: second valve

326: pump 330: air discharge valve

400: fluid pulsation generator 410: fluid drive pump

420: first control valve 430: second control valve

450: control panel 500: fluid flow control device

510: first three-way valve 512: first drive motor

520: second three-way valve 522: second drive motor

Claims (11)

In the automatic cleaning device for a plate heat exchanger, The fluid inlet provided in the plate heat exchanger is connected to the air bubble generation and distribution device for generating and introducing air bubbles into the fluid supplied to the plate heat exchanger, The air outlet provided in the plate heat exchanger is connected to the air separation device for separating the air present in the fluid used for heat exchange, The air separation device includes a first air separation device for separating air existing in phase separation with the fluid in the fluid used for heat exchange, and a second air separation device for separating air dissolved in the fluid. Automatic cleaning device for plate heat exchanger. The method of claim 1, The air bubble generation and distribution device, An air bubble supply nozzle connected to the plate heat exchanger through a fluid inlet provided in the plate heat exchanger; An air compressor installed at an end of the air bubble supply nozzle to supply air bubbles into the plate heat exchanger; Regulator for adjusting the amount of air bubbles generated from the air compressor and And a plurality of distribution heads for distributing air bubbles from the air bubble supply nozzle to the hot plate of the heat exchanger. 3. The method of claim 2, The air bubble generating and dispensing device further comprises an ozone generator connected to the air bubble supply nozzle, characterized in that the plate-type heat exchanger automatic cleaning device, characterized in that configured further. delete delete The method of claim 1, The first and second air separation device is an automatic cleaning device for a plate heat exchanger, characterized in that the air discharge valve for discharging the separated air to the outside is installed. In the automatic cleaning device for a plate heat exchanger, The fluid inlet provided in the plate heat exchanger is connected to the air bubble generation and distribution device for generating and introducing air bubbles into the fluid supplied to the plate heat exchanger, Between the fluid inlet for injecting the heat exchange fluid to the plate heat exchanger and the plate heat exchanger is connected to the fluid pulsation device for generating turbulence in the fluid flowing into the plate heat exchanger, The fluid pulsation generating device includes a fluid driving pump for generating pulsation in the fluid flowing into the plate heat exchanger, and first and second control valves connected to the front and rear of the fluid driving pump, respectively. Automatic cleaning device for plate heat exchanger. delete The method of claim 7, wherein The fluid pulsation generating device further comprises a control panel for controlling the on / off and linear opening and closing of the first and second control valves. The method according to claim 1 or 7, And a fluid flow controller connected to the plate heat exchanger to change the flow direction of the fluid through the flow path switching between the fluid inlet for injecting and discharging the heat exchange fluid into the plate heat exchanger and the plate heat exchanger. Automatic cleaning device for plate heat exchanger. The method of claim 10, The fluid flow control device includes a first and a second three-way valve for switching the flow path to change the flow direction of the fluid, and a first and second driving motors connected to the first and second three-way valves, respectively. Automatic cleaning device for a plate heat exchanger, characterized in that configured to include.

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