KR101126787B1 - Automatic cleaning system for small sized heat exchangers - Google Patents

Abstract

The present invention relates to an automatic cleaning device for a small heat exchanger, and more particularly, using a cleaning ball such as a sponge ball to automatically clean pollutants attached to the inner wall of a heat exchanger tube, but in a fluid flow direction. The present invention relates to a small heat exchanger automatic cleaning device capable of cleaning the inside of a heat exchanger tube of a heat exchanger in both directions with a simple configuration by changing a flow direction of a fluid (cooling water) using a switching device.

The present invention is a small heat exchanger automatic cleaning device using a plurality of cleaning ball, characterized in that configured to be able to clean the heat exchanger in both directions by switching the flow direction of the fluid in the forward or reverse direction by the fluid flow direction switching device. .

Heat exchanger, heat pipe, pollutant, cleaning device, cleaning ball, fluid flow direction changer

Description

Automatic cleaning system for small sized heat exchangers}

The present invention relates to an automatic cleaning device for a small heat exchanger, and more particularly, using a cleaning ball such as a sponge ball to automatically clean pollutants attached to the inner wall of a heat exchanger tube, but in a fluid flow direction. The present invention relates to a small heat exchanger automatic cleaning device capable of cleaning the inside of a heat exchanger tube of a heat exchanger in both directions with a simple configuration by changing a flow direction of a fluid (cooling water) using a switching device.

In general, a shell & tube type heat exchanger having a plurality of tubes arranged inside a shell has been widely used in a refrigerating device or a chemical plant. It is cooled by heat exchange.

However, when the heat exchanger is used for a long time, foreign substances such as microorganisms and dust in the air are introduced into the fluid, and they accumulate on the inner surface of the heat exchanger heat exchanger tube to form deposits such as scale and slime, thereby degrading the performance of the heat exchanger. Problems such as shortening have arisen, and these deposits need to be cleaned regularly.

The heat exchanger tube cleaning device for removing the deposits on the inner wall of the tube by forcibly passing the cleaning ball such as a sponge ball to the inside of the tube by using a flow of fluid as a method for cleaning the scale or slime accumulated on the inner surface of the heat exchanger tube and A number of methods have been applied and used, and the conventionally applied apparatus and methods pass through the cleaning ball by using compressed air or by using a forward and reverse circulation pump when the cleaning ball is input. And because the recovery is not made properly, and a separate facility for generating compressed air has to be installed, there is a problem that the efficiency of the facility decreases due to the increase in the cost of the facility and frequent failures. In the first place, since the price of the forward and reverse circulating pump is expensive, When the ball is collected, the cleaning ball is recovered by the suction force of the reversely rotating circulation pump, so that the flow resistance to the fluid flow increases, and wear occurs due to friction between the cleaning balls, which shortens the service life of the cleaning ball. there was.

As a method for solving such problems, Korean Patent Publication No. 10-0472308 discloses a heat exchanger automatic cleaning device using an eject, the main configuration of which is shown in Figure 1, the inlet pipe 11 on one side Discharge pipes 12 are formed on the other side, respectively, and are connected to a heat exchanger 10 having heat transfer tubes 13 therein, and a discharge pipe 12 of the heat exchanger 10, and discharged through the discharge pipe 12. A ball separator 20 having a separator plate 22 therein to separate the fluid and the washing ball 32, and the washing ball 32 to the heat exchanger 10 or the washing ball storage tank 30. The ball inlet conduit 24 and the ball recovery conduit 26 connected to the ball outlet 23 of the inlet pipe 11 and the ball separator 20 and the ball inlet conduit 24 and the ball so that the input or recovery is made. It is installed in parallel so as to communicate with the recovery conduit 26, so that the cleaning ball 32 can be collected inside. The cleaning ball storage tank 30 is provided with a collecting net 34, and is installed to communicate with the lower end of the cleaning ball storage tank 30 through the supply recovery conduit 36, the circulation pump at the time of recovery of the cleaning ball 32 Eject 40 and the fluid discharge pipe 28 to allow the cleaning ball 32 to be recovered from the ball separator 20 into the cleaning ball storage tank 30 where the pressure is lowered through the injection action of the fluid supplied from the 50. ) To the fluid inlet conduit (62) and the fluid inlet conduit (62) consisting of a fluid inlet conduit (62) and a fluid outlet conduit (64) so as to be resupplyed through the ejection (40). Installed in the circulation pump 50 for supplying fluid to the ejector 40 so that the injection and recovery of the cleaning ball 32 through the one-way rotation, and the fluid outflow conduit 64 on the outlet side of the ejector 40 It is installed, characterized in that consisting of an electric valve 70 for the cleaning ball 32 to be recovered or put in accordance with opening and closing The.

However, the configuration as described above operates a circulation pump that rotates in one direction while the electric valve installed in the ejection outlet side conduit is closed to supply a fluid to the cleaning ball storage tank in which the cleaning ball is collected and supply the cleaning ball through the supplied fluid. In addition to being introduced into the heat exchanger tube of the heat exchanger, the cleaning ball is passed through the fluid flow to remove the scale in the heat exchanger tube, and when the recovery ball is collected, the circulation pump is operated while the electric valve is opened. The cleaning ball can be recovered into the cleaning ball storage tank where the pressure has dropped through the suction force, so that the cleaning ball input and recovery time can be arbitrarily adjusted according to the installation site conditions, so that the cleaning ball can be smoothly added and recovered and Temporary stagnation of cleaning balls discharged to the ball separator, pressure loss and cleaning caused by stagnation Although there is an effect that can prevent the wear of the ball, it is difficult to apply to clean a small heat exchanger of less than about 125A of fluid pipe diameter in consideration of the installation cost and installation space because the configuration is complicated.

In addition, the use of small shell and tube type heat exchangers has been recently expanded, and the market scale has been expanded. However, the supply of the cleaning device for cleaning the small shell and tube type heat exchangers has not been properly achieved.

The present invention has been made in order to solve the above problems, the object of the present invention is to simplify the configuration, such as the need for a circulation pump or an auxiliary pipe for passing the cleaning ball, small heat exchanger automatic applicable to a small heat exchanger In providing a cleaning device.

In addition, the present invention can be used to clean the heat exchanger in both directions by switching the flow direction of the fluid flowing into the heat exchanger using the fluid flow direction switching device to increase the cleaning effect, as well as to insert and retrieve the cleaning ball Another object of the present invention is to provide a small heat exchanger automatic cleaning device which can omit the accessory piping and devices, thereby greatly reducing the installation cost and installation space.

According to an aspect of the present invention,

A small heat exchanger automatic cleaning device using a plurality of cleaning balls, characterized in that it comprises a fluid flow direction switching device for switching the flow direction of the fluid in the forward or reverse direction in order to clean the heat exchanger in both directions.

In addition, the present invention is a heat exchanger having a heat transfer tube therein, a pipe portion connected to the heat exchanger is supplied to supply the fluid to the inside of the heat exchanger, the fluid flow direction switching to adjust the flow direction of the fluid installed in the pipe portion A ball wrapper connected to one side between the device and the fluid flow direction switching device and the heat exchanger to receive the cleaning ball and a bolt wrap connected to the other side between the fluid flow direction switching device and the heat exchanger to hold the cleaning ball. Characterized in that it comprises a device.

At this time, the pipe portion is a fluid supply pipe for supplying a fluid into the heat exchanger, a fluid return pipe for recovering the fluid passing through the heat exchanger, and fluid supply / is connected between the fluid flow direction switching device and the ball recovery device A return pipe, a ball supply / recovery pipe connected between the ball recoverer and a heat exchanger, a ball recovery / supply pipe connected between the heat exchanger and the bolt wrap device, and the bolt wrap device and a fluid flow direction switching device Characterized in that consisting of a fluid return / supply pipe is installed between.

In addition, the fluid flow direction switching device is characterized in that consisting of a 4-way valve (4-ways valve).

In addition, the fluid flow direction switching device is characterized in that the combination of four two-way valve or a combination of two three-way valve.

On the other hand, the ball recovery device is provided with a first filtering net for filtering the cleaning ball, the flow control plate for adjusting the flow of fluid flowing through the pipe portion is installed on the upper side of the fluid flow direction switching device of the first filtering net is installed. It is done.

At this time, both sides of the ball recovery device is characterized in that the pipe connecting portion is installed horizontally connected to the pipe portion.

In addition, the inside of the bolt wrap device is characterized in that the inner cylinder for filtering the cleaning ball while passing the flow of the fluid is provided.

Here, the inner cylinder is formed at the end of the non-water-passing portion and the non-water-passing portion formed at the end of the first water passage, and the end of the first water passage to prevent the cleaning ball from being pushed into one side, Characterized in that it comprises a second water passage to prevent the ball from exiting to the front.

In addition, the end portion of the non-passing portion is characterized in that the fluid guide wing portion for extending the flow of the fluid is formed smoothly.

In addition, a separation plate having a through hole for separating the fluid and the cleaning ball is installed inside the bolt wrap device, and a ball holder having a second sieve for filtering the separated cleaning ball is connected to the bottom of the bolt wrap device. Characterized in that installed.

At this time, the induction plate for guiding the discharge direction of the cleaning ball to the lower end of the separating plate is formed bent, the ball holder is characterized in that the electric valve for controlling the flow of the fluid is connected.

According to the apparatus for automatically cleaning a small heat exchanger according to the present invention, there is no need for a separate power source such as a compressor or a pump for inputting and recovering a cleaning ball, and there is no need to install an accessory pipe in the field, thereby simplifying the device configuration. In addition, the device manufacturing cost can be reduced, and the installation space can be easily secured, so that the cleaning method using the cleaning ball can be applied to a small heat exchanger, which has been difficult to apply due to problems such as device cost and installation space.

In addition, according to the present invention by using a fluid flow direction switching device to change the flow direction of the fluid flowing into the heat exchanger to the cleaning ball to clean the heat exchanger heat pipe in both directions by the force of the cleaning ball acting on the pollutant The direction of action can be reversed and reversed to maximize the cleaning effect, and the need to install the accessory pipes can greatly shorten the movement path of the cleaning ball, thus reducing the wear of the cleaning ball. To have.

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

2 and 3 is a schematic view showing a small heat exchanger automatic cleaning device according to the present invention, Figure 4 (a), (b) is another embodiment of the fluid flow direction switching apparatus of the present invention shown in FIG. FIG. 5 is a front sectional view showing a ball recovering device among the present invention shown in FIG. 2, FIG. 6 is a front sectional view showing a bolt wrap device of the present invention shown in FIG. 2, and FIG. 6 is a perspective view showing the inner cylinder of the bolt wrap apparatus of the present invention shown in Figure 6, Figures 8 and 9 is a schematic view showing another embodiment of the automatic heat exchanger cleaning device according to the present invention, Figure 10 is in FIG. A cross-sectional view of the bolt wrap device and a detailed view of a separator plate of the present invention shown.

According to the present invention, the cleaning ball 150 is circulated into the heat exchanger tube 112 of the heat exchanger 110 to maintain the inside of the heat exchanger tube always in a clean state. The present invention relates to a small heat exchanger automatic cleaning device (100) capable of saving energy, and does not require a pump or the like for inserting and recovering the cleaning ball (150) as in the related art, and simply switches the fluid flow direction (120). By changing the flow direction of the fluid (cooling water) flowing into the heat exchanger 110 by using the cleaning ball 150 in the forward or reverse direction to clean the inside of the heat transfer pipe 112 of the heat exchanger 110 in both directions. It is characterized by what is made possible.

Therefore, the number and length of the pipes for circulating the cleaning ball 150 can be reduced, thereby simplifying the overall configuration, thereby reducing the manufacturing cost of the equipment and ensuring the installation space, and thus can be easily applied to the small heat exchanger 110. There is one advantage.

In more detail, the small heat exchanger automatic cleaning device 100 according to the present invention, as shown in Figure 2 and 3, the heat exchanger 110, piping 130, fluid flow direction switching device 120, It is configured to include a ball recovery machine 140 and the bolt wrap device (160).

First, the heat exchanger 110 is a small heat exchanger 110, which can obtain a wide range of heat transfer amount, and is formed in a shell & tube form having a wide application range and high reliability and efficiency. . The heat exchanger 110 has one or more heat transfer pipes 112 installed therein so that the fluid flowing through the pipe part 130 flows inside the heat exchanger 110 to exchange heat with the cooled fluid. .

Next, the pipe 130 is installed to be connected to the heat exchanger 110 to supply the fluid and the cleaning ball 150 to the inside of the heat exchanger 110 will be described later, but the fluid supply pipe 131 and the fluid It is composed of a return pipe 132, a fluid supply / return pipe 133, a ball supply / recovery pipe 134, a ball recovery / supply pipe 135 and a fluid return / supply pipe 136.

In addition, the fluid flow direction switching device 120 is installed in the central portion of the pipe 130 and serves to adjust the flow direction of the fluid coming through the fluid supply pipe 131, the ball recovery machine 140 is a fluid Installed on one side between the flow direction switching device 120 and the heat exchanger 110 serves to receive and store the cleaning ball 150 for cleaning the heat transfer pipe 112 provided inside the heat exchanger 110. The bolt wrap device 160 is installed on the other side between the fluid flow direction switching device 120 and the heat exchanger 110 to primarily clean the cleaning ball 150 used for cleaning the heat exchanger 110. It is to separate and stay.

In more detail, first, the pipe unit 130 includes a fluid supply pipe 131, a fluid return pipe 132, a fluid supply / return pipe 133, a ball supply / recovery pipe 134, and a ball as described above. It is composed of a recovery / supply pipe 135 and a fluid return / supply pipe 136, the fluid supply pipe 131 flows through the inside of the heat exchanger 110, the passage for supplying a fluid that allows heat exchange with the cooled fluid The fluid return pipe 132 is supplied through the fluid supply pipe 131 and passes through the inside of the heat exchanger 110 to serve as a passage for discharging the fluid used for heat exchange and cleaning to the outside. At one end of the fluid supply pipe 131 and the fluid return pipe 132 (a point where the fluid supply pipe 131 and the fluid return pipe 132 meet), the fluid flow direction switching device 120 is installed.

In addition, the fluid supply / return tube 133 is connected between the fluid flow direction switching device 120 and the ball recoverer 140 to supply the fluid supplied through the fluid supply pipe 131 to the ball recoverer 140. When the fluid supplied through the fluid supply pipe 131 by the fluid flow direction switching device 120 is sent to the fluid return / supply pipe 136, the inside of the heat exchanger 110 While passing through the fluid used in the heat exchange and cleaning fluid flow direction switching device 120 through the fluid return pipe 132 serves as a passage.

Next, the ball supply / recovery tube 134 is installed between the ball recoverer 140 and the heat exchanger 110 to clean the fluid and the fluid using the flow of the fluid supplied through the fluid supply / return tube 133. It serves as a passage for introducing the ball 150 into the heat exchanger 150, the fluid supplied through the fluid supply pipe 131 by the fluid flow direction switching device 120 is the fluid return / supply pipe 136 In the case of being sent to the interior of the heat exchanger 110 while passing through the interior of the fluid used for the heat exchange and cleaning ball 150 to serve as a passage for discharging the ball recovery unit 140.

Next, the ball recovery / supply pipe 135 is installed between the heat exchanger 110 and the bolt wrap device 160 so that the fluid supplied through the fluid supply pipe 131 is transferred by the fluid flow direction switching device 120. When supplied to the fluid supply / return tube 133 (hereinafter, referred to as 'forward passing'), the fluid and the washing ball 150 used for heat exchange and cleaning are passed through the inside of the heat exchanger 110, and the bolt wraps. Acts as a passage to discharge to the device 160, and the fluid supplied through the fluid supply pipe 131 is supplied to the fluid return / supply pipe 136 by the fluid flow direction switching device 120 (hereinafter ' The cleaning ball 150 stayed inside the bolt wrap device 160 together with the fluid using the flow of the fluid supplied through the fluid return / supply pipe 136 to the heat exchanger 110. It serves as a passage to supply internally.

In addition, the fluid return / supply pipe 136 is installed between the bolt wrap device 160 and the fluid flow direction switching device 120, the fluid supplied through the fluid supply pipe 131 is a fluid flow direction switching device ( In the case of the forward passage supplied to the fluid supply / return tube 133 by the 120, the fluid after the cleaning ball 150 is filtered by the bolt wrap device 160 is returned to the fluid through the fluid flow direction switching device 120. It serves as a passage for discharging to the pipe 132, otherwise, that is, in the case of the reverse passage serves as a passage for supplying the fluid supplied through the fluid supply pipe 131 to the bolt wrap device (160).

At this time, the fluid flow direction switching device 120 using a 4-way valve (122) (4-way valve 122) in each direction of the four-way valve 122, the fluid supply pipe 131, the fluid return pipe 132, By connecting and installing the fluid supply / return tube 133 and the fluid return / supply tube 136, the flow direction of the fluid supplied through the fluid supply tube 131 may be changed only by the operation of the four-way valve 122. However, if necessary, as shown in FIGS. 4A and 4B, four two-way valves 124 may be combined with each other, or two three-way valves 126 may be combined with each other to form a fluid flow direction switching device 120. The fluid supply pipe 131, the fluid return pipe 132, the fluid supply / return pipe 133 and the fluid return / supply pipe 136 may be in communication with each other by the configuration.

On the other hand, the ball recovery unit 140 is connected between the fluid supply / return pipe 133 and the ball supply / recovery pipe 134 is installed to accommodate the cleaning ball 150 therein, the As shown in FIG. 5, the ball reclaimer 140 is provided with a first sieve 142 for filtering and accommodating the washing ball 150, and the fluid flow direction switching device of the first sieve 142 ( The flow control plate 144 is installed on the upper side of the 120 to adjust the flow of the fluid flowing through the fluid supply / return tube 133 when the fluid passes in the forward direction so that the fluid flows from the bottom to the inside of the ball recoverer 140. It is configured to be discharged to the ball supply / recovery pipe 134 through the pipe connecting portion 146 to be described later while the cleaning ball 150 in the state accommodated in the first sieve 142 by upward. At this time, the flow control plate 144 is the cleaning ball 150 introduced through the ball supply / return pipe 134 during the reverse circulation of the fluid is accommodated in the first sieve 142 and the fluid supply / return pipe 133 It also prevents you from getting out of it.

That is, pipe connecting portions 146 connected to the fluid supply / return tube 133 and the ball supply / recovery tube 134 are formed at both upper sides of the ball recoverer 140, respectively. As shown in FIG. 5, the pipe connection part 146 connected to the supply / return tube 133 is installed to be connected to the outer cylinder of the ball recoverer 140 so that the fluid flowing through the fluid supply / return tube 133 is flow control plate. 144 so that the cleaning ball 150 accommodated in the interior of the first sieve 142 can be raised by flowing down into the bottom of the ball reclaimer 140 and upward, and the ball supply / recovery pipe 134 The pipe connecting portion 146 connected to the) is connected to the first sieve 142 is configured to be discharged through the ball supply / recovery pipe 134 raised by the flow of the cleaning ball.

At this time, the pair of pipe connecting portion 146 is installed horizontally so that it can be installed in a line with the fluid supply / return pipe 133 and the ball supply / return pipe 134 by automatic cleaning of the small heat exchanger according to the present invention The installation of the device 100 is configured to facilitate the plumbing work. That is, in the related art, the one side pipe connection part 146 into which the fluid is introduced is formed at the lower part of the ball recoverer 140 so that the cleaning ball is raised by the fluid flowing from the lower part. Since the pipe connection part 146 is formed at the lower and upper portions of the ball recovery machine 140, the pipe connection part 146 must be separately installed to match the pipes installed in a straight line when the heat exchanger cleaning device is installed. Compared to the hassle, the small heat exchanger automatic cleaning device 100 according to the present invention is configured to horizontally configure the pipe connecting portion 146 formed on both upper sides of the ball recovery machine 140, so as to separate There is no need to install the pipes.

In addition, a transparent portion 148 is installed on the upper surface of the ball recoverer 140 to visually check the flow and wear of the cleaning ball 150.

Meanwhile, the bolt wrap device 160 is installed between the ball recovery / supply pipe 135 and the fluid return / supply pipe 136 so that the washing ball 150 may be discharged from the heat exchanger 110 during forward circulation. To filter and discharge only the fluid through the fluid return / supply pipe 136, and in the reverse circulation, the cleaning ball 150 staying inside by the flow of fluid flowing through the fluid return / supply pipe 136. It serves to discharge through the ball recovery / supply pipe 135, the inside of the bolt wrap device 160 is provided with an inner cylinder 170 for filtering the cleaning ball 150 while passing the flow of fluid in the forward circulation It is.

6 and 7, the inner tube 170 includes a first water passage 172, a non-water passage 174, a second water passage 176, the first water passage portion 172 is formed on the side of the inner cylinder 170 so that the one end is in communication with the ball recovery / supply pipe 135 serves to prevent the cleaning ball 150 from exiting through the side of the inner cylinder 170 to the outside The non-water passing part 174 is formed at the other end of the first water passing part 172 so that a plurality of cleaning balls 150 are formed by the flow of fluid flowing through the ball recovery / supply pipe 135 in the forward circulation. The fluid return / supply pipe 136 side of the inner cylinder to serve to maintain a certain distance from each other without being driven, the second water flow portion 176 is formed perpendicular to the end of the non-water flow portion 174 is Serves to prevent the cleaning ball 150 from escaping through the fluid return / supply pipe 136 The.

In addition, at the end of the non-water passing portion 174, the fluid guide blade 178 is formed to extend in the horizontal direction outside of the second water passage 176, the fluid guide wing 178 is a fluid return / during the reverse circulation / It is to alleviate the lack of straightness of the fluid flow flowing through the supply pipe (136). That is, the flow of the fluid flowing through the second water passage 176 is restricted due to the cleaning ball 150 remaining in the inner cylinder 170 during the reverse circulation of the fluid, so that the fluid return / supply pipe 136 Fluid flowing through the flow into the space formed between the inner wall of the bolt wrap device 160 and the outer wall of the inner cylinder 170, the cleaning ball 150 remaining in the inner cylinder 170 is ball recovery / supply pipe 135 It may be difficult to discharge through the), the fluid guide vane 178 is guided to the fluid flowing through the fluid return / supply pipe 136 to the second water passage 176 to the second water passage By ensuring the straightness of the fluid flowing through the 176 is to ensure that the cleaning ball 150 located inside the inner cylinder 170 can be smoothly discharged through the ball recovery / supply pipe 135.

On the other hand, as shown in Figures 8 to 10, according to another embodiment of the small heat exchanger automatic cleaning device 100 using the fluid flow direction change in accordance with the present invention, the inner cylinder 170 inside the bolt wrap device 160 Instead of the separation plate 180 is formed, a ball holder 190 may be connected to the lower portion of the bolt wrap device 160, the separation plate 180 to separate the fluid and the cleaning ball 150 Through holes 182 are formed, and the ball holder 190 is provided with a second sieve 192 for accommodating the cleaning ball 150 separated by the separating plate 180.

That is, the separating plate 180 is installed diagonally inside the bolt wrap device 160 so that the fluid flowing through the ball recovery / supply pipe 135 when the fluid passes in the forward direction is returned to the fluid through the through hole 182. / Discharge to the supply pipe 136, the cleaning ball 150 is to stay inside the bolt wrap device (160).

At this time, the induction plate 184 is formed at the lower edge of the separating plate 180 is bent inwardly, the induction plate 184 stops the operation of the cleaning device 100 after passing the fluid forward, ball A certain amount of fluid flowing through the recovery / supply pipe 135 and the cleaning ball 150 serve to change the traveling direction so as to flow into the ball holder 190 connected to the lower portion of the bolt wrap device 160.

In addition, the ball holder 190 is provided with an electric valve 194 is connected to the electric valve 194 is a branch pipe connected between the fluid return / supply pipe 136 and the electric valve 194 in the reverse passage of the fluid Since the fluid is supplied to the ball holder 190 through the 137, the cleaning ball 150 accommodated in the second sieve network 192 of the ball holder 190 receives a heat exchanger through the ball recovery / supply pipe 135. 110) to be introduced into the interior. In addition, when the fluid passes through the cleaning operation of the heat exchanger tube 112 of the heat exchanger 110, the fluid entering the inside of the bolt wrap device 160 by opening the electric valve 194 is ball holder 190 Orienting so that the cleaning ball 150 staying in the interior of the bolt wrap device 160 is accommodated in the second sieve 192 of the ball holder 190.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation of the small heat exchanger automatic cleaning device 100 according to the present invention.

First, in one embodiment of the small heat exchanger automatic cleaning device 100 according to the present invention shown in Figure 2, the fluid flowing through the fluid supply pipe 131 by adjusting the fluid flow direction switching device 120 is the fluid flow direction Through the switching device 120 to be supplied to the fluid supply / return pipe 133 side (forward pass).

The fluid supplied to the fluid supply / return tube 133 is introduced into the ball recovery unit 140 and is introduced into the heat exchanger 110 through the ball supply / recovery tube 134 together with the cleaning ball 150. At this time, the fluid flowing into the ball recovery unit 140 is guided to the lower direction of the ball recovery unit 140 through the flow control plate 144, as shown in Figure 5, again by the bottom surface of the ball recovery unit 140 As it is raised to raise the cleaning ball 150 accommodated in the first sieve 142 is configured so that the cleaning ball 150 can be easily discharged to the ball supply / recovery pipe 134.

As described above, the cleaning ball 150 entrained in the fluid is introduced into the heat exchanger 110 to clean the contaminants attached to the inner wall of the heat transfer pipe 112 while passing through the inside of the heat transfer pipe 112 in the forward direction, and the cleaning is completed. The cleaning balls 150 are discharged through the ball recovery / supply pipe 135 installed in the heat exchanger 110 together with the fluid, and the inside of the inner cylinder 170 installed in connection with the ball recovery / supply pipe in the bolt wrap device 160. Is supplied.

Therefore, the cleaning ball 150 is filtered by the inner cylinder 170 to remain in the interior of the inner cylinder 170, the fluid is formed in the inner cylinder 170, the first and second water passages 172, 176 Out through the through the fluid return / supply pipe 136 and the fluid flow direction switching device 120 is discharged through the fluid return pipe 132. In this case, as shown in FIGS. 6 and 7 at the end of the inner cylinder 170, the non-passing portion 174 is formed, the cleaning ball 150 stays in the interior of the inner cylinder 170, the second passing portion 176 It is not crowded from the side.

On the other hand, through this process, the cleaning ball 150 stored in the ball recovery machine 140 is exhausted, or the cleaning ball 150 stays inside the inner cylinder 170 is a predetermined number or more flow of fluid If this is not smooth, the fluid flow direction switching device 120 is switched so that the fluid flowing through the fluid supply pipe 131 flows toward the fluid return / supply pipe 136 as shown in FIG. Reverse pass).

As such, when the flow direction of the fluid is changed, the cleaning balls 150 staying inside the inner cylinder 170 by the flow of the fluid flowing into the bolt wrap device 160 through the fluid return / supply pipe 136 are provided. Through the ball recovery / supply pipe 135 is supplied back into the heat exchanger (110). The cleaning ball 150 supplied to the inside of the heat exchanger 110 passes through the inside of the heat pipe 112 in the reverse direction to clean the contaminants that have not been cleaned in the previous process.

As described above, the cleaning balls 150 used to clean the heat transfer pipes 112 are introduced into the ball recovery machine 140 through the ball supply / recovery pipe 134 by the flow of the fluid and filtered by the first strainer. The fluid is received and discharged through the fluid supply pipe 132 through the fluid supply / return pipe 133 and the fluid flow direction switching device 120.

When all the cleaning balls 150 stayed in the inner cylinder 170 of the bolt wrap device 160 by the reverse flow of the fluid is released, the fluid flow direction switching device 120 is switched again to the fluid supply pipe 131 Fluid flowing through the flow in the direction of the fluid supply / return pipe 133 so that the cleaning ball 150 passes through the inside of the heat transfer pipe 112 in the forward direction, and repeats this process about 10 times, the heat exchanger (110) Heat exchange tube 112 of the circumference is cleaned about 10 times in a reciprocating, and finally the cleaning ball 150 is to be recovered to the first sieve 142 of the ball recovery machine 140 after the small heat exchanger automatic cleaning device according to the present invention The operation of 100 ends.

Next, in another embodiment of the small heat exchanger automatic cleaning device 100 according to the present invention shown in Figures 8 and 9, the fluid flowing through the fluid supply pipe 131 using the fluid flow direction switching device 120 Cleaning the inside of the heat exchanger tube 112 of the heat exchanger 110 in both directions by changing the direction is the same as the above-described embodiment, but there is a difference in the configuration of the bolt wrap device 160, so that the cleaning ball 150 is in the forward direction. After passing through the inside of the heat exchanger 110 there is a difference in the process of switching to the reverse direction in the bolt wrap device 160 and the position to store the cleaning ball 150 after the cleaning operation.

That is, when the fluid is supplied in the forward direction by the fluid flow direction switching device 120, the cleaning ball 150 stored in the ball recovery machine 140 is inside the heat transfer pipe 112 of the heat exchanger 110 by the flow of the fluid. After washing while passing through the ball recovery / supply pipe 135 is introduced into the interior of the bolt wrap device 160 with the fluid, wherein the cleaning ball 150 is installed diagonally inside the bolt wrap device 160 Filtered by the separation plate 180 to stay, the fluid exits through the through hole 182 formed in the separation plate 180 and passes through the fluid return / supply pipe 136 and the fluid flow direction switching device 120 It is discharged through the fluid return pipe (132). At this time, the electric valve 194 connected to the bolt wrap device 160 is kept in a closed state.

Next, the cleaning balls 150 stored in the ball recovering machine 140 are exhausted or the cleaning balls 150 staying inside the bolt wrap device 160 become a predetermined number or more, so that the fluid flows smoothly. If not, switch the fluid flow direction switching device 120 so that the fluid flowing through the fluid supply pipe 131 flows toward the fluid return / supply pipe 136 as shown in FIG. 9. The washing ball 150 stayed in the 160 passes through the heat exchanger tube 112 of the heat exchanger 110 in the reverse direction, and is cleaned and discharged through the ball supply / recovery tube 134 to the ball recovery machine 140. Are accepted.

The same process is repeated 10 times a day to maintain the inside of the heat exchanger tube 112 of the heat exchanger 110 to be clean, another embodiment of the present invention shown in Figure 8 and Figure 9 cleaning ball 150 There is an advantage that can be stored in the ball recovery machine 140 and the ball holder 190, that is, two places. In other words, one embodiment of the present invention described above is a washing device in a state in which the cleaning ball 150 is accommodated in the first sieve 142 of the ball recovery machine 140 after passing the cleaning ball 150 in the reverse direction ( 100 has to be stopped, but another embodiment of the present invention can accommodate the cleaning ball 150 in the ball reclaimer 140 and the ball holder 190, so after the forward pass or the reverse pass by the user's choice You can stop the operation.

In more detail, when stopping the operation of the cleaning device 100 after passing the cleaning ball 150 in the forward direction, open the electric valve 194 through the ball recovery / supply pipe 135 through the bolt wrap device 160 The cleaning balls 190 staying inside the bolt wrap device 160 are guided to the flow of the fluid by directing the flow of fluid flowing into the ball holder 190 connected to the lower portion of the bolt wrap device 160. By being accommodated in the second sieve 192 provided in the ball holder 190 by closing the electric valve 194 so that the cleaning ball 150 is not interfered with the flow of the fluid. At this time, the guide plate 184 formed on the lower end of the separating plate 180 installed inside the bolt wrap device 160 is a ball holder installed with a certain amount of fluid and the cleaning ball 150 connected to the lower portion of the bolt wrap device 160 It is induced to flow into the inside (190).

In addition, when the cleaning balls 150 are in the state accommodated in the second sieve 192, in order to operate the cleaning device 100 again to pass the cleaning ball 190 into the heat exchanger 110, first, Adjust the fluid flow direction switching device 120 so that the fluid supplied from the fluid supply pipe 131 flows in the reverse direction, that is, through the fluid return / supply pipe 136, and then open the electric valve 194 to return the fluid return / The fluid flowing into the supply pipe 136 flows into the lower portion of the ball holder 190 through the branch pipe 137 so that the cleaning balls 150 accommodated in the second sieve 192 are raised to recover the ball. It is to be introduced into the heat exchanger 110 through the 135. At this time, when all of the cleaning balls 150 accommodated in the second sieve 192 are released, the electric valve 194 is closed again to prevent the fluid from flowing into the branch pipe 137 so that the inside of the pipe 130 is opened. Allow it to pass smoothly.

Accordingly, the small heat exchanger automatic cleaning device 100 according to the present invention uses the fluid flow direction switching device 120 to switch the flow direction of the fluid flowing into the heat exchanger 110 so that the cleaning ball 150 is bidirectional. By allowing the heat exchanger 110 and the heat transfer pipe 112 to be cleaned, the force action direction of the cleaning ball 150 acting on the contaminant may be reversed and reversed to maximize the cleaning effect. There is no need for a separate power source such as a compressor or a pump to input and retrieve the cleaning ball 150, and there is no need to install an accessory pipe in the field, so the device configuration can be very simple, thereby reducing the device manufacturing cost. Various advantages, such as applying the cleaning method using the cleaning ball 150 to the small heat exchanger, which has been difficult to apply due to problems such as equipment cost and installation space due to easy installation space. That will.

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 small heat exchanger, and more particularly, using a cleaning ball such as a sponge ball to automatically clean pollutants attached to the inner wall of a heat exchanger tube, but in a fluid flow direction. The present invention relates to a small heat exchanger automatic cleaning device capable of cleaning the inside of a heat exchanger tube of a heat exchanger in both directions with a simple configuration by changing a flow direction of a fluid (cooling water) using a switching device.

1 is a schematic view showing a heat exchanger automatic cleaning device using a conventional eject.

2 and 3 is a schematic view showing a compact heat exchanger automatic cleaning device using a fluid flow direction change according to the present invention.

Figure 4 (a), (b) is a schematic diagram showing another embodiment of the fluid flow direction switching apparatus of the present invention shown in FIG.

Figure 5 is a front sectional view showing a ball recoverer of the present invention shown in FIG.

Figure 6 is a front sectional view showing a bolt wrap device of the present invention shown in FIG.

7 is a perspective view showing the inner cylinder of the bolt wrap device of the present invention shown in FIG.

8 and 9 is a schematic view showing another embodiment of a small heat exchanger automatic cleaning device using a fluid flow direction change according to the present invention.

10 is a cross-sectional view of the bolt wrap device of the present invention shown in Figure 8 and a detailed view of the separator.

Explanation of symbols on the main parts of the drawings

100: (automatic) cleaning device 110: heat exchanger

112: heat transfer pipe 120: fluid flow direction switching device

122: 4-way valve 124: 2-way valve

126: 3-way valve 130: piping

131: fluid supply pipe 132: fluid return pipe

133: fluid supply / return pipe 134: ball supply / return pipe

135: ball recovery / supply pipe 136: fluid return / supply pipe

137: branch pipe 140: ball recovery machine

142: first strainer 144: flow control plate

146: pipe connection 148: transparent portion

150: cleaning ball 160: bolt wrap device

170: inner barrel 172: first water passage

174: non-water passing 176: second water-passing

178: fluid guide wing 180: separation plate

182: through hole 184: guide plate

190: ball holder 192: second manure network

194: electric valve

Claims (12)

In a small heat exchanger automatic cleaning device using a plurality of cleaning balls, including a pipe, a ball recovery device, a bolt wrap device, It is provided in the pipe portion, and comprises a fluid flow direction switching device for switching the flow direction of the fluid (cooling water) in the forward or reverse direction to clean the heat exchanger in both directions, The pipe part includes a fluid supply pipe for supplying a fluid into the heat exchanger, a fluid return pipe for recovering the fluid that has passed through the heat exchanger, and a fluid supply / return pipe connected between the fluid flow direction switching device and the ball recovery device. And a ball supply / recovery pipe connected between the ball recoverer and the heat exchanger, a ball recovery / supply pipe connected between the heat exchanger and the bolt wrap device, and between the bolt wrap device and the fluid flow direction switching device. Small heat exchanger automatic cleaning device, characterized in that consisting of a fluid return / supply pipe connected to the installation. A heat exchanger having heat transfer tubes therein; A pipe part connected to the heat exchanger and configured to supply and recover fluid (cooling water) to the inside of the heat exchanger; A fluid flow direction switching device installed at the pipe to control a flow direction of the fluid; A ball recovery device connected to one side between the fluid flow direction switching device and the heat exchanger to accommodate a cleaning ball; It is configured to include a bolt wrap device is connected to the other side between the fluid flow direction switching device and the heat exchanger to hold the cleaning ball, The pipe part includes a fluid supply pipe for supplying a fluid into the heat exchanger, a fluid return pipe for recovering the fluid that has passed through the heat exchanger, and a fluid supply / return pipe connected between the fluid flow direction switching device and the ball recovery device. And a ball supply / recovery pipe connected between the ball recoverer and the heat exchanger, a ball recovery / supply pipe connected between the heat exchanger and the bolt wrap device, and between the bolt wrap device and the fluid flow direction switching device. It consists of a fluid return / supply pipe connected to The ball recovery device is provided with a first filtering net for filtering the cleaning ball, the flow control plate for adjusting the flow of fluid flowing through the pipe is installed on the upper side of the fluid flow direction switching device of the first filtering net, Small heat exchanger automatic cleaning device, characterized in that the two sides of the ball recovery unit is formed horizontally connected to the pipe connected to the pipe. delete The method according to claim 1 or 2, The fluid flow direction switching device is a small heat exchanger automatic cleaning device, characterized in that consisting of a 4-way valve (4-ways valve). The method according to claim 1 or 2, The fluid flow direction switching device is a small heat exchanger automatic cleaning device, characterized in that configured by combining four two-way valve or two three-way valve. delete delete 3. The method of claim 2, The inside of the bolt wrap device is a small heat exchanger automatic cleaning device, characterized in that the inner cylinder for filtering the cleaning ball while passing the flow of the fluid is provided. The method of claim 8, The inner cylinder has a first water passage to prevent the cleaning ball from escaping to the side, a non-water passing portion formed at the end of the first water passage to prevent the cleaning ball from being gathered in one place, and a cleaning ball formed at the end of the non-water passage. Small heat exchanger automatic cleaning device, characterized in that it comprises a second water passage so as not to escape to the front. The method of claim 9, Small end heat exchanger automatic cleaning device, characterized in that the fluid guide wing is extended to the end of the non-passing portion to facilitate the flow of the fluid. 3. The method of claim 2, A separation plate having a through hole for separating the fluid and the cleaning ball is installed inside the bolt wrap device, and a ball holder having a second sieve net for filtering the separated cleaning ball is installed at the bottom of the bolt wrap device. Small heat exchanger automatic cleaning device characterized in that. The method of claim 11, Induction plate for bending the discharge direction of the cleaning ball to the lower end of the separating plate is formed bent, the ball holder is characterized in that the auto-cleaning of the small heat exchanger is connected to the electric valve for controlling the flow of fluid Device

Images