JP6033715B2 - Cleaner collection device for tube heat exchanger - Google Patents

Description

  The present invention relates to a cleaning body collecting device used for a heat transfer tube cleaning device installed for the purpose of cleaning the inside of a heat transfer tube of a tubular heat exchanger.

  In a tubular heat exchanger used in a power plant, heat is exchanged through cooling water through a heat transfer tube. Seawater or the like is used as the cooling water, but with operation, foreign matters such as marine organisms and slime (adhesive substances derived from bacteria) adhere to the inner surface of the heat transfer tube, resulting in a problem that the heat transfer performance deteriorates.

  As a method of preventing deterioration in heat transfer performance, a cleaning body (sponge ball) is included in the cooling water, and the cleaning body is passed through the heat transfer tube together with the cooling water, and the marine organisms and slime adhered to the inner surface of the heat transfer tube are cleaned. A cleaning method using a heat transfer tube cleaning device that is removed by the above is widely known. The diameter of the cleaning body is generally slightly larger than the inner diameter of the heat transfer tube.

  In cleaning the heat transfer tubes of the tubular heat exchanger by the heat transfer tube cleaning device, the cleaning body is introduced into the cooling water passage from the upstream side of the tubular heat exchanger. Cleaning is performed by the cleaning body passing through the inside of the heat transfer tube of the tubular heat exchanger. The cleaning body that has passed through the inside of the heat transfer tube is collected by a cleaning body collecting device installed on the downstream side of the tubular heat exchanger. The cleaning body collected by the cleaning body collecting device is taken out from the cooling water passage and flows into the cleaning body recovery device by the circulation pump. And the washing | cleaning body which flowed into the washing | cleaning body collection | recovery device is returned in the system | strain of a heat exchanger tube cleaning apparatus, when washing | cleaning of a heat exchanger tube is continued and implemented. That is, the heat exchanger tube of the tubular heat exchanger is continuously washed again from the upstream side of the tubular heat exchanger.

  As described above, the cleaned body after the heat transfer tube cleaning is captured and recovered by the cleaning body collecting device installed on the downstream side of the tubular heat exchanger, but could not be captured and recovered by the cleaning body collecting device. Since the cleaning body is discharged to the outside together with the cooling water, there is a need for a cleaning body collecting device that can capture and recover the supplied cleaning body more reliably.

  Conventionally, for example, a cleaning body collection device described in Patent Document 1 has been proposed as a cleaning body collection device that more reliably collects a cleaning body flowing through a cooling water passage. In the cleaning body collecting device described in Patent Document 1, a collection grid installed in a V shape so that the upstream side expands in the cooling water passage, and the cleaning body collected by the collection grid is used as the cooling water passage. In the cleaning body collecting apparatus provided with the cleaning body extraction pipe for extracting outside, in order to rectify the drift from the upstream, a rectifying member for dividing the cooling water passage between the collection grids is provided.

  In the cleaning body collecting apparatus described in Patent Document 1, the cleaning body adheres to the collection grid and stagnates because the flow from the upstream side is rectified by the rectifying member and the cleaning body flows along the rectified streamline. It can flow along the collection grid without doing so. Thereby, the cleaning body which flows through a cooling water channel | path can be stably collected with respect to the drift of the cooling water from an upstream side, and the collection | recovery performance of a cleaning body is improved.

Japanese Unexamined Patent Publication No. 04-214199

  In the cleaning body collection device described in Patent Document 1, since a collection grid installed in a V shape is used so that the upstream side expands in the cooling water passage, It was necessary to install a cleaning body extraction pipe and a flow regulating member.

  Therefore, the material and structure used for the pipe (cleaning body extraction pipe) for taking out the cleaning body from the central part of the body of the cleaning body collecting device must be strong enough to withstand the stress generated by the cooling water flow. Yes, the internal structure is complicated.

  The purpose of the present invention is to simplify the internal structure, and further to suppress the phenomenon that the cleaning body adheres to and stays in the collection grid and to obtain a good recovery performance of the cleaning body. An object of the present invention is to provide a device for collecting a cleaning device for genus.

  In order to solve the above-mentioned problems, the present invention is configured as described in the claims.

  Specifically, for example, the structure of the collection grid is changed to a reverse V shape in which the upstream side is expanded from a V shape in which the upstream side is expanded, and a cleaning body outlet is provided on the body side surface of the cleaning device collection device.

  As a preferred embodiment, a cooling water guide rectifying plate is installed on the side surface of the body of the cleaning device collecting device.

  According to the present invention, it is possible to simplify the internal structure, and it is possible to obtain a good recovery performance of the cleaning body by suppressing the phenomenon that the cleaning body adheres to and stays on the collection grid.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a longitudinal cross-sectional view of the washing body collection apparatus for tubular heat exchangers which shows one Example of this invention. It is AA arrow sectional drawing of FIG. FIG. 6 is another example of a cross-sectional view taken along the line AA in FIG. 1.

  Hereinafter, the structure and function of a cleaning body collecting apparatus for a tubular heat exchanger (hereinafter referred to as a cleaning body collecting apparatus) which is an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of the cleaning body collecting apparatus of the present embodiment, and FIG. 2 is a sectional view taken along arrow AA in FIG.

  The cleaning body collecting device is a device that constitutes the heat transfer tube cleaning device installed in the cooling water passage for the purpose of cleaning the inside of the heat transfer tube of the tubular heat exchanger. The collector is mainly composed of a cylindrical cleaning body collector body 2, a collection grid 3 for collecting the cleaning body flowing in the cooling water, and a cleaning body collected by the collection grid 3. Has a cleaning body outlet 6 for taking out the water from the cooling water passage.

  The cylindrical cleaning body collecting apparatus body 2 is installed on the downstream side of the tubular heat exchanger.

  The collection grid 3 is attached to the collection grid axis 4, and when the collection grid axis 4 is rotated by the drive device 9, the collection grid 3 is shown as a solid line and a two-dot chain line as shown in FIG. 1. The posture shown by can be taken. In FIG. 1, the solid line indicates the case where the collection grid 3 is in the cleaning body collecting position.

  In this embodiment, as shown in FIG. 1, when the collection grid 3 is at the cleaning body collection position, the collection is performed so as to have an inverted V shape in which the downstream side is expanded with respect to the flow of the cooling water. A lattice 3 is constructed and arranged. That is, when the collection grid 3 is at the cleaning body collecting position, the upper ends of the left and right collection grids 3 are in contact with the central portion of the cleaning body collection device body 2.

  Further, in this embodiment, as shown in FIG. 2, the collection grid 3 is configured to have a width smaller than that of the cleaning body collection apparatus body 2, and the closing plates 8 are installed on both sides of the collection grid 3. doing. The closing plate 8 is installed on the inner wall of the cleaning body collecting apparatus body 2 so that all the cooling water passes through the collecting grid 3 when the collection grid 3 is at the cleaning body collecting position. By using the closing plate 8, the plane of the collection grid 3 can be formed in a rectangular shape, and the structure of the collection grid 3 is simplified. In FIG. 2, a part of the collection grid 3 (left side of the drawing) is not shown. Reference numeral 10 denotes a reinforcing member for the collection grid 3.

  In the present embodiment, the cleaning body collected by the collection grid 3 is taken out from the cooling water passage by providing the cleaning body outlet 6 below the cleaning body collector body 2. The cleaning body outlet 6 is connected to the body wall surface below the cleaning body collecting device body 2, i.e., on the side wall of the cleaning body collecting device body in the vicinity of the upper surface of each end side on the side of the collection grid. It is comprised by attaching.

  By disposing the collection grid 3 in an inverted V shape, the cleaning body collected by the collection grid 3 is the upper surface on the end side on the expanded side of the inverted V shape, that is, the cleaning body collection device body 2. Collected on the wall side. Then, the cleaning body is taken out from the cleaning body outlet 6 provided on the wall surface of the cleaning body collecting apparatus body 2. Therefore, compared with the conventional cleaning body collection device provided with the cleaning body extraction pipe in the central part of the cleaning body collection device body 2, a cleaning body collection device having a simplified internal structure can be obtained.

  Further, in this embodiment, a cooling water guide rectifying plate 5 for improving the recovery performance of the cleaning body and an induction member for guiding the cleaning body to the cleaning body outlet 6 are provided on the inner wall of the cleaning body collecting device body 2. 7 is provided.

  The cooling water guide rectifying plate 5 is composed of a semi-elliptical plate 5a and a parallel plate 5b. The semi-elliptical plate 5a is provided with a certain angle (inclined so that the downstream side is located on the cylinder center side) so that the semi-elliptical part is in contact with the inner wall of the cleaning body collecting apparatus body 2. The parallel flat plate 5b is a flat plate provided substantially parallel to the axial direction of the cleaning body collecting apparatus body 2 from the end of the semi-elliptical plate 5a toward the downstream side. The lower end of the parallel plate 5b is in contact with the guide member 7 (upstream guide member 7a).

  The surface of the cleaning body collecting device body 2 side is flattened by the cooling water guide rectifying plate 5, and the drift from the upstream side is rectified as compared with the case of the cylindrical inner surface, and the cleaning body adheres to and stays on the collection grid 3 Can be prevented, and the recovery performance of the cleaning body can be improved. In addition, a rectification | straightening member is not limited to this, Various forms can be taken.

  The guide member 7 is installed at the downstream end of the cooling water guide rectifying plate 5. The guide member 7 includes an upstream guide member 7a and a downstream guide member 7b. In the present embodiment, the distance between the upstream guide member 7a and the downstream guide member 7b is a substantially equal distance as shown in FIG. Further, as shown in FIG. 2, the upstream guide member 7a and the downstream guide member 7b are provided so as to be exactly fit between the left and right closing plates 8. Further, as shown in FIG. 1, when the collection grid 3 is in the cleaning body collecting position, the guide member 7 has a larger space between the upstream guide member 7 a and the collection grid 3 than the cleaning body. The body is configured to pass between them, and the lower end side of the collection grid 3 is in contact with the downstream side guide member 7b so that the cleaning body does not flow downstream. And as shown in FIG. 2, the central part of the guide member 7 is installed perpendicular to the axial direction of the cleaning body collecting device body 2, and its both sides are located upstream as it goes to the end, It is installed at an angle with respect to the axial direction.

  By installing the guide member 7 in this way, the cleaning body is guided to the center along the inclined surface of the guide member 7. The cleaning body outlet 6 is located at the center of the guide member 7 between the upstream guide member 7a and the downstream guide member 7b, and the cleaning body guided to the center by the guide member is removed from the cleaning body. It is collected from the exit.

  Further, as described above, the space between the upstream guide member 7a and the collection grid 3 is formed larger than the cleaning body. In this embodiment, the upstream guide member 7a and the collection grid 3 The gap is formed at a smaller interval than the foreign matter. In this way, by forming a parallel duct with the collection grid 3 and the guide member 7, the cleaning body can be passed, while preventing a foreign matter larger than the cleaning body from blocking the cleaning body outlet 6. it can.

  In this embodiment, the upstream guide member 7a of the guide member 7 protrudes from the cooling water guide rectifying plate 5 (parallel plate 5b) to the central portion side of the cleaning body collecting device body 2 by a certain length. By adopting such a structure, generation of forced separation convection is promoted on the downstream side of the upstream guide member 7a, and the stagnation of the cleaning body is prevented.

  In the above-described embodiment, one cleaning body outlet 6 is provided on the wall surface on one side of the cleaning body collector body 2. However, a plurality of cleaning body outlets may be provided. A case where a plurality of cleaning body outlets are provided on the wall surface on one side of the cleaning body collecting apparatus body 2 will be described with reference to FIG. 3 is a cross-sectional view taken along the line AA of FIG. 1, as in FIG. In the present embodiment, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description of the same components is omitted.

  In this embodiment, as shown in FIG. 3, a plurality of cleaning body outlets 16-1 and 16-2 are provided on the wall surface on one side of the cleaning body collecting device body 2. By installing a plurality of cleaning body outlets in accordance with the size of the cooling water passage, a large cleaning body collecting device can be used.

  In this embodiment, the guide member 17 (the upstream guide member 17a and the downstream guide member 17b) is corrugated so that the cleaning body outlets 16-1 and 16-2 are positioned at the lowermost part of the guide member. It is installed in the shape. That is, as shown in FIG. 3, the guide member is divided into two regions in the width direction, and each central part of the divided guide member is installed perpendicular to the axial direction of the cleaning body collecting device body 2. The both sides of each central portion are installed obliquely with respect to the axial direction so as to be positioned upstream as they are separated from the respective central portions. And the washing body outlet 16-1, 16-2 is located in each center part. By comprising in this way, a guidance member can be reduced in size even when providing multiple cleaning body outlets 16-1 and 16-2.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 ... Cooling water flow direction 2 ... Cleaning body collection apparatus body 3 ... Collection grating | lattice (position at the time of cleaning body collection)
4 ... Collection grating shaft 5 ... Cooling water guide rectifying plate 5a ... Semi-elliptical plate 5b ... Parallel plate 6 ... Cleaning body outlet 7 ... Guiding member 7a ... Upstream guiding member 7b ... Downstream guiding member 8 ... Closing plate 9 ... Drive unit 10 ... reinforcing member 16-1 ... cleaning body outlet 16-2 ... cleaning body outlet 17 ... guide member 17a ... upstream side guiding member 17b ... downstream side guiding member

Claims (9)

A cleaning device collecting device for a tubular heat exchanger used in a heat transfer tube cleaning device for cleaning the inside of the heat transfer tube of the tubular heat exchanger,
A cleaning body collecting device body installed downstream of the tubular heat exchanger;
It is a collection grid that is installed in the body of the cleaning body collecting device and captures and collects the cleaning body, and is arranged in an inverted V shape that expands the downstream side, and on each end side upper surface on the expansion side A collection grid for collecting the cleaning bodies;
A cleaning body take-out port for taking out the cleaning body captured and collected by the collection grid from the body of the cleaning body collection device, and in the vicinity of the upper surface of each end side on the expansion side of the collection grid It has a cleaning body outlet provided on the side wall of the cleaning body collecting device body,
A cooling water guide rectifying member is provided on the inner wall of the cleaning body collecting device body,
The cooling water guide rectifying member is composed of a semi-elliptical plate and a parallel plate,
The semi-elliptical plate is provided so as to be inclined so that the semi-elliptical part is in contact with the inner wall of the cleaning body collecting apparatus body, and the downstream side is located on the central side of the cleaning body collection apparatus body,
The parallel plate is provided substantially parallel to the axial direction of the cleaning body collecting device body from the end of the semi-elliptical plate located on the cleaning body body of the cleaning body body toward the downstream side. A cleaning body collecting device for a tubular heat exchanger. In the washing body collection apparatus for tubular heat exchangers according to claim 1 ,
A guiding member for guiding the cleaning body collected on the inner wall side of the cleaning body collecting device body to the cleaning body take-out port by the collection grid is provided on the inner wall of the cleaning body collection device body. A cleaning body collecting device for a tubular heat exchanger. In the washing body collection apparatus for tubular heat exchangers according to claim 1 ,
A guide member for guiding the cleaning body collected on the inner wall side of the cleaning body collecting apparatus body by the collection grid to the cleaning body outlet is provided on the inner wall of the cleaning body collection apparatus body,
The guide member has an upstream guide member installed at a downstream end of the cooling water guide rectifying member, and a downstream guide member installed at a distance from the upstream guide member,
The cleaning body collecting device for a tubular heat exchanger, wherein the cleaning body outlet is provided between the upstream side guiding member and the downstream side guiding member and at a central portion of the guiding member. A cleaning device collecting device for a tubular heat exchanger used in a heat transfer tube cleaning device for cleaning the inside of the heat transfer tube of the tubular heat exchanger,
A cleaning body collecting device body installed downstream of the tubular heat exchanger;
It is a collection grid that is installed in the body of the cleaning body collecting device and captures and collects the cleaning body, and is arranged in an inverted V shape that expands the downstream side, and on each end side upper surface on the expansion side A collection grid for collecting the cleaning bodies;
A cleaning body take-out port for taking out the cleaning body captured and collected by the collection grid from the body of the cleaning body collection device, and in the vicinity of the upper surface of each end side on the expansion side of the collection grid It has a cleaning body outlet provided on the side wall of the cleaning body collecting device body,
A cooling water guide rectifying member is provided on the inner wall of the cleaning body collecting device body,
A guide member for guiding the cleaning body collected on the inner wall side of the cleaning body collecting apparatus body by the collection grid to the cleaning body outlet is provided on the inner wall of the cleaning body collection apparatus body,
The guide member has an upstream guide member installed at a downstream end of the cooling water guide rectifying member, and a downstream guide member installed at a distance from the upstream guide member,
The cleaning body collecting device for a tubular heat exchanger, wherein the cleaning body outlet is provided between the upstream side guiding member and the downstream side guiding member and at a central portion of the guiding member. In the washing body collection apparatus for tubular heat exchangers according to claim 4 ,
The guide member is configured to have a substantially uniform distance between the upstream guide member and the downstream guide member,
The central portion of the guide member is installed so as to be substantially perpendicular to the axial direction of the cleaning body collector body,
The pipe characterized in that both sides of the central portion of the guide member are installed obliquely with respect to the axial direction of the cleaning body collecting device body so as to be located upstream as it goes toward the end of the guide member. Cleaner collection device for type heat exchanger. In the washing body collection apparatus for tubular heat exchangers according to claim 4 or 5 ,
A cleaning unit for a tubular heat exchanger, characterized in that the interval between the upstream guide member and the collection grid is larger than the cleaning unit and smaller than foreign matter. apparatus. In the pipe | tube-type heat exchanger cleaning body collection apparatus as described in any one of Claims 4-6 ,
The cleaning body collecting device for a tubular heat exchanger, wherein the upstream guide member is configured to protrude from the cooling water guide rectifying member toward a central portion of the cleaning body collecting device body. In the washing body collection apparatus for tubular heat exchangers according to claim 1 ,
A cleaning body collecting device for a tubular heat exchanger, wherein a plurality of the cleaning body outlets are provided on each of the side walls of the body of the cleaning body collecting device. A cleaning device collecting device for a tubular heat exchanger used in a heat transfer tube cleaning device for cleaning the inside of the heat transfer tube of the tubular heat exchanger,
A cleaning body collecting device body installed downstream of the tubular heat exchanger;
It is a collection grid that is installed in the body of the cleaning body collecting device and captures and collects the cleaning body, and is arranged in an inverted V shape that expands the downstream side, and on each end side upper surface on the expansion side A collection grid for collecting the cleaning bodies;
A cleaning body take-out port for taking out the cleaning body captured and collected by the collection grid from the body of the cleaning body collection device, and in the vicinity of the upper surface of each end side on the expansion side of the collection grid It has a cleaning body outlet provided on the side wall of the cleaning body collecting device body,
A cooling water guide rectifying member is provided on the inner wall of the cleaning body collecting device body,
A plurality of the cleaning body outlets are provided on each of the side walls of the cleaning body collector body,
A guide member for guiding the cleaning body collected on the inner wall side of the cleaning body collecting apparatus body by the collection grid to the cleaning body outlet is provided on the inner wall of the cleaning body collection apparatus body,
The guide member includes an upstream guide member installed at a downstream end of the cooling water guide rectifying member, and a downstream guide member installed at substantially equal intervals from the upstream guide member. Have
The guide member is provided with a plurality of places installed so as to be substantially perpendicular to the axial direction of the cleaning body collecting apparatus body, and both sides of the vertically installed places are installed vertically. It is installed obliquely with respect to the axial direction of the cleaning body collecting device body so as to be located upstream as it moves away from
The plurality of cleaning body outlets are disposed between the upstream side guiding member and the downstream side guiding member, and the guiding member is substantially perpendicular to the axial direction of the cleaning body collecting device body. A cleaning body collecting device for a tubular heat exchanger, which is provided at each of a plurality of installed locations.

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