JPS6069496A - Cleaner element trapping device for pipe-type heat exchanger - Google Patents

Abstract

PURPOSE:To reduce the manufacturing cost by forming a body shell in a rectangular shape and forming a trapping screen to match a square flow passage section, and further to reduce the operating cost by eliminating a blind plate and reducing the fluid pressure loss as well as to improve the performance by prohibiting a deflected flow at the screen. CONSTITUTION:A cleaner element trapping device comprises a rectangular body shell 51, a rectangular trapping screen 52, a duct 53, a cleaner element extracting pipe 54 and a pressurized water outlet pipe 55, etc., and the body shell 51 is connected to a condensor cooling water outlet pipe via a diffuser etc. that transforms the shape of the fluid passage section from a circle to a square. As the body shell 51 is made by four flat plates which are welded together, no blind plate is required and the trapping screen 52 can take a simple configuration, resulting in a reduction of manufacturing cost of the overall device in comparison with conventional types. Further, when a condenser is being operated, the fluid pressure loss is reduced because there is no closed section by the blind plate in the flow passage, resulting in saving the operating cost. In addition, as there is no deflected flow, the trapping performance can be improved.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention involves putting a cleaning body such as a sponge ball into cooling water to clean the inside of the heat transfer tubes of a heat exchanger, and then capturing the cleaning body. The present invention relates to a cleaning body collection device for a tubular heat exchanger.

[Background of the invention]

FIG. 1 shows a schematic diagram of a condenser cleaning device. When the cleaning balls S introduced into the condenser shield door water inlet system 3 from the cleaning ball input pipe 5 pass through the heat transfer tube 2 built into the condenser 1 and come into contact with them, they remove water scale, foreign matter, etc. , removed and then discharged to the condenser circulation water outlet system 4. The discharged cleaning body S is extracted and collected by a collection device 6 disposed in the outlet system, and is again introduced into the condenser' and circulating water inlet system by the cleaning ball circulation pump 7.

An example of a conventional condenser washer collection device is shown from FIG. 2 to FIG. 6.

The cleaning body collection device is mainly used for 11. It consists of a collection grid 12, a duct 13, a cleaning body extraction pipe 14, a pressure water/spout pipe 15, etc. The fuselage 11 is condensed water that is not small! Ii) Connected to the cooling water outflow pipe from Jl, with flanges welded at both ends. DI' 1 body] At the bottom of 1, wash ljI body extraction-fi' on both sides in the diametrical direction.
1 is welded, and a flange is attached to the outer end of the body to connect it to a circulation system (not shown). The inner end of the body opens toward the upstream side of the cooling water, and corresponds to a cleaning body outlet 16 formed by a pair of collection racks 4 working together.

The duct 13 has a semicircular cross section, its opening faces upstream of the cooling water, and has a mountain-shaped slope with the apex at the center of the body, and its descending end is connected to the cleaning body extraction pipe 14. It is connected to the inner end of the lateral body.

The width of the duct 13 and the inner diameter of the cleaning body extraction pipe 14 are as follows.

All of them are sized so that a cleaning body S such as a sponge ball can easily pass through them.

The collection grid [2] has a large number of bars arranged side by side at appropriate intervals along the direction of flow of cooling water, and is arranged symmetrically on the upstream side of the duct 13. These bars are.

At the cleaning body capture position, near the side edge of Dak I~]3.

It extends toward the flow side and is inclined at an appropriate angle so as to form a V-shape with opposing collection gratings 12, and the upper end of the crosspiece is almost in contact with the inner wall of the body. The cleaning body extraction pipe 14 and the duct 13 are missing to form a cleaning body outlet 1G through which not only the cleaning body but also large foreign objects can pass. In this case, as shown in FIG. 6, the lower end of the crosspiece has a bent structure so that it can be locked to the side edge of the duct, and the collection grid 12 is fixed with a collection grid shaft 17. One end of this collecting grid shaft 17 protrudes outward from the j-barrel body 11, and the two collecting grids are connected to each other. - A handle 18 is fixed to its end shaft, and by operating this handle 18, the collection grid 12 can be swung. The width of the collection grid 12 is 5
, collection grid 1111 supported within the fuselage 11 ], 7
1 sky is made equal for each length of the grid, so the collection grid 1
A vertical flat plate 19 is provided adjacent to the crosspiece of the second side carpet.

One end of the pressure water jet pipe 15 is closed, and a straight pipe with a plurality of holes protruding toward the upstream side of the cooling water is inserted from the outside of the fuselage to the inside. (It is designed to be connected to a jet water pipe (not shown).

Therefore, when the cooling water mixed with the cleaning body and having been cleaned after passing through the heat transfer tube of the condenser flows from the upstream side of the body 11 through the cooling water outflow pipe, the cleaning body S is It collides with a pair of collection gratings 12, descends along the inclined crosspiece, and falls into the duct 13, as shown in FIG. The cleaning body S that has fallen into the duct 13 rolls along the slope of the duct 13, passes through the cleaning body outlet 16, enters the cleaning body extraction pipe 14, and is reliably captured.

7 to 9 show other conventional examples of condenser cleaning body collection devices.

In this case, the diameter of the body 31 is large, and if the configuration of the first example shown in FIG. For this purpose, the interior of the fuselage is roughly divided into two by a partition plate 30, and the configuration of the first example is applied to each cooling water passage having a roughly semicircular cross section. That is, in these figures, the cooling water flowing through the cooling water outflow pipe (not shown) reaches the body 31 and is divided into halves by the partition plate 30, and the cleaning water that has penetrated into the divided cooling water is removed. The body is
One semicircular cooling water passage 39 along the partition plate 30
65 collection gratings 3 across the center line M that almost bisects the
Collected by 2A and 32B.

The collected cleaning body falls along an appropriately set slope, and is placed on the center line M', Schiff h':! 3, and is turned according to the slope ISd of the duct 33, and is reliably extracted through the cleaning body extraction pipe 34;
It penetrates through, and has flanges in contact with 'I'LL on both ends, and is F- so that it can be connected to the jet water piping on either side due to the piping, and there is also a collection grid. 32
A, 32+3 can be swung through the collection grid tII 37 by operating the J111 collection grid shaft handle 38. A cleaning body outlet 13G is formed corresponding to the connection position with the data 1-33 cleaning 7fI body extraction pipe 34.

Therefore, even if the fuselage has a large diameter, by dividing the cold water passageway, the slope of the duct and the slope of the duct can both be set to appropriate values, and the fuselage Another conventional example is shown in FIGS. 10 to 12. In this case, the second example explained in FIGS. 7 to 9 is basically the same. However, as the diameter of the fuselage increases, if the cleaning body outlet is located on the fuselage wall side, the slope of the duct and the angle of inclination of the collection grid will deviate from the appropriate range, causing problems inside the duct. The duct 43 should be located along the center line that almost partially covers the cooling water passage 49, since the movement of the cleaning body and the inclination of the collecting grid may impede the descent of the cleaning body to the cleaning body outlet. , in opposite directions with the center of this center line as the top (
It is configured in a W-shape so that it descends at an appropriate gradient in the left-right direction in FIG. This descending end portion is connected to one end of a cleaning body extraction pipe 44 . Furthermore, a cleaning body outlet 46 is formed by cutting out a portion of the lower end of the bar of the lattice, corresponding to the connection point between the descending end of the duct 43 and the cleaning body outflow pipe 44 .

The crosspieces constituting the collection grids 42A and 42B extend from near the side edge of the W-shaped duct 43 toward the upstream side at the cleaning body collection position, and form a V-shape with the collection grids 42A and 42B facing each other. The crosspiece is inclined at an appropriate angle so as to form an angle, and the upper end of the crosspiece is almost in contact with the inner wall of the fuselage.

In this way, the conventional condenser washer i4'+salt collection device [row] is a condenser circulating water outlet system with a plurality of collection grates 7 on a cylindrical body with a diameter approximately equal to the piping diameter. ) ~ is installed in a swingable state, and the cleaning body is taken out from the circulating water 7.1'llf system by an extraction pipe installed downstream of the eLII.

However, as shown in FIGS. 2 to 4, in order to swing the collection grid 12, the collection grid 12 is placed on the midstream side of the collection grid axis 17. Vertical straightening plate] s + is provided so that it is spaced apart from the inner wall surface of the body (without wobbling, and in addition, in order to close the gap between this vertical flat plate 19 and the inner wall surface of the body, the vertical flat plate Jl dlE (I
At t'i, one blind stub 20 must be lined up in the direction of the flow and set at an angle.

This blind plate 20 not only requires a lot of effort in manufacturing, but also blocks the flow path, causing an increase in fluid pressure loss. Moreover, in the second and third conventional examples described above, the blind plate 40A is asymmetrical in the portion shown by I in FIG.

40B is installed, the drifting flow shown in FIG. 14 occurs, the cleaning body S is pressed against the collection grid 32, and the cleaning body is blocked at the lower part of the collection grid, impairing the collection performance.

In addition, in the conventional collection device using a cylindrical body, the contact portion Q between the collection grid 32B and the body inner wall surface 31 shown in FIG. 13 forms a complicated three-dimensional curve. It takes a lot of effort to produce.

[Purpose of the invention]

The purpose of the present invention is to reduce the manufacturing cost by making the body at the cleaning body collecting position square, and to eliminate the need for an m-plate.
A cleaning body collection device that reduces the condenser operating cost to 1 by reducing fluid pressure loss in the flow path, eliminates the occurrence of drift on the collection grid surface, and improves cleaning body collection performance. It is on offer.

[Summary of the invention]

The gist of the present invention is that the body of the cleaning body collecting device is square,
A feature is that the collection grid is configured to match the square cross-sectional shape of the flow path.

[Embodiments of the invention]

Embodiments of the present invention are shown in FIGS. 15 to 17. The cleaning body collecting device mainly has a rectangular body 5],
Square collection grid 52. Duct 53. Cleaning body extraction tube 54. It consists of a pressure water jet pipe 55'4. The body 51 is connected to a condenser cooling water outflow pipe (not shown) via a differential user (not shown) V that changes the cross-sectional shape of the flow path from circular to square.

The fuselage 5j has a structure in which four flat plates are assembled by welding.

Furthermore, the conventional blind plate is no longer necessary, and the collection grid 5
2 also clearly has a simple shape. Compared to the conventional type, the manufacturing cost of the entire installation+ffi is significantly reduced.

Furthermore, during condenser operation, there is no blockage in the flow path due to blind spots, so fluid pressure loss is reduced and operating costs can be saved.

Another embodiment of the present invention is shown in FIGS. 18 to 20. This is an application of the configuration of the first embodiment of the present invention to a cooling water passage which has a rectangular cross-section, with the body of the collection device being angled and the inside of the body being partitioned by a partition plate 60. At this time, not only is there an advantage in the first embodiment compared to the conventional method, but the occurrence of drifting on the upstream side of the collection grid 32 shown in FIGS. 13 and 14 is eliminated;
The collection performance of the cleaning body can be improved. Furthermore, the shape of the collection gratings 62A, 62B is different from that of the second example.
Not only is it simple, but it also has four collection gratings 62A,
62B can all be made the same shape, making it possible to significantly reduce production costs.

Further embodiments of the present invention are shown in FIGS. 21 to 23. In this case, the body of the third known example explained in FIGS. 10 to 12 is square, and the structure of the present invention is applied thereto.

[Effects of the Invention] According to the present invention, manufacturing costs can be reduced, and pressure loss can be reduced.
This reduces operating costs, eliminates the occurrence of drift, and improves collection performance.

[Brief explanation of the drawing]

Fig. 71 is a system diagram of a condenser cleaning device, Fig. 2 is a plan view of a conventional cleaning body collection device, Fig. 3 is a sectional view taken along the DI-m arrow in Fig. 2, and Fig. 4 is a A sectional view taken along the IV-IV arrow in Figure 2,
Figure 5 shows 1φ arrest! A perspective view of the IS device, FIG. 6 is a partially enlarged perspective view of the duct, FIG. 1 is a plan view showing the second conventional example, FIG. 9 is a sectional view taken along the Uζ-m arrow in FIG. 8, FIG. 10 is a plan view showing the third conventional example, FIG. 1I is a sectional view taken along the XJ-M arrow in FIG. 10, and FIG. is a sectional view taken along the ■-■ arrow in Fig. 11, and the 13th
The figure is a perspective view of the conventional second example.
Enlarged section XIV of the figure, sectional view viewed from the side, No. 15
(Fig. 16, a plan view of an embodiment of the present invention)
51ja is a cross-sectional view taken along the line - 20 is a sectional view taken along arrow XX in FIG. 19, FIG. 21 is a plan view of the third embodiment of the present invention, and FIG. Cross section 1-1 in the direction of the arrow, Figure 23 is XX111-X in Figure 22.
I = 7i plane (ne 1 along
... Collection grating, 53... Duct, 54 Cleaning body extraction tube, No. 1 [il No. 20 No. 1.r2 1st g mouth 111 country 210 ripe 27 dark 23 figure

Claims (1)

[Claims] 1. A collection grid provided in the cooling waterway to collect the cleaning body that has been introduced into the cooling water and washed the inside of the heat transfer tube of the heat exchanger, and by this collection grid. In a cleaning body collection device for a tubular heat exchanger equipped with a cleaning body extraction pipe for extracting the collected cleaning body to the outside of the commercial cooling water passage, the body is square and matches the cross-sectional shape of the body. A cleaning body collection device for a tubular heat exchanger, characterized by comprising a collection grid. 2. Claim 1, wherein the cooling water channel is formed into a plurality of pieces by dividing the inside of the cooling water pipe.
The cleaning body collection device for a tubular heat exchanger as described in 2.