JPS6130077Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a dust removal device for a heat exchanger, and in particular, relates to the structure of a dust removal device for a heat exchanger in which horizontally arranged heat exchanger tubes are supported by a tube plate. .

Generally, devices for removing dust attached to the heat exchanger tubes of a heat exchanger include a soot blower that blows away the dust attached to the heat exchanger tubes, or a device that applies a direct impact to the heat exchanger tubes by hitting the heat exchanger tubes with a hammer. There are devices that remove dust by applying impact to the heat exchanger tubes, but a method that uses a hammer body to impact the heat exchanger tubes is considered advantageous in terms of power costs and other factors.

FIGS. 1 and 2 show an example of a conventional dust removal device using this method.
and 4, and suspends the upper end of the bent pipe part with a metal fitting 5.
It is suspended from the ceiling of the main body 1 by. Reference numeral 6 denotes a rod for transmitting shock to the heat exchanger tube 2, and is provided within the main body 1 so as to be able to move horizontally across the main body 1.
The rods 6 are fitted with branch pieces 6a, and the branch pieces 6a collide with each heat exchanger tube 2 as the rod 6 moves, giving an impact to the heat exchanger tubes 2 to remove dust. 7 is a hammer, which is pivotally attached to the tip of an arm 9 fixed to a rotating shaft 8;
After the position of the rod reaches its limit position (the position shown by the dashed line in FIG. 2), it is suddenly swung down and a shock is transmitted to the end 10 of the rod 6. In the illustrated example, four arms 9 are fixed on a rotating shaft 8 as a common axis, and thereby apply an impact via four rods 6 to all eight vertical rows of heat exchanger tubes 2. Here is an example arranged so that it can give .

The above-mentioned conventional device can be used extremely efficiently for a heat exchanger in which the heat transfer tubes are arranged in a vertical direction as in this example, but Application of the above-mentioned conventional device to a container is almost impossible due to various difficult problems. That is, due to the nature of the hammering device using the hammer 7, the rotating shaft 8 must be arranged horizontally, but in this case, one rotating shaft is prepared for each of the many hammers arranged vertically. However, it is difficult to apply the above-mentioned conventional dust removal device to this type of horizontal piping heat exchanger because the arrangement and drive device become complicated and the device becomes extremely inefficient. However, as mentioned above, there were problems that made it almost impossible to realize it.

This invention was made for the purpose of solving the above-mentioned conventional problems by providing a dust removal device using hammering that can be applied extremely efficiently to horizontal piping heat exchangers.

Next, the configuration of this invented device will be explained in detail based on drawings showing embodiments. In FIGS. 3 and 4, a large number of heat transfer tubes 12 arranged horizontally inside the main body 11 of the heat exchanger are connected to a header 13.
and 14. Reference numeral 15 denotes a tube plate, which is penetrated by the heat exchanger tubes 12.
It is intended to support the In the illustrated example, twelve tube sheets 15 are arranged in four rows, and each tube sheet 15 in each row can swing in a plane perpendicular to the heat exchanger tubes 12 by hanging fittings 17 from a beam 16. They are hung one after another. Reference numeral 18 denotes a rod which is fixed to the side edge of the tube plate 15 and has its tip projected to the outside of the main body 11, and its end 19 is opposed to the hammer 7 of each hammering device. The hammers 7 are pivotally attached to the tips of arms 9 to which respective rotating shafts 8 are fixed, and apply an impact to the end portions 19 in a direction along a plane orthogonal to the heat exchanger tubes in accordance with the rotation of the rotating shafts 8. 20 is a motor for transmitting rotational power to the rotating shaft 8. As shown in the figure, the reason why the number of tube sheets in one row is three is to reduce the number of rotating shafts 8 to the minimum possible number, and to achieve effective rocking by the impact of one hammer. It is determined based on the maximum permissible weight of the tube sheet to cause heat exchanger to occur, and is appropriately selected depending on the capacity of the heat exchanger.

As in the present invention, a device for removing dust adhering to the circumferential surface of a heat exchanger tube is constructed by dividing the heat exchanger tube into a plurality of groups according to the upper and lower positions, and supporting each set with an independent tube plate. The tube sheets are suspended in a sash-like manner by hanging fittings in order to allow swinging in a plane perpendicular to the heat transfer tubes, and an impact along the plane is applied to each tube sheet. Since the hammer is applied to the end, the effect of the impact from the hammer is effectively and independently exerted on each set of heat transfer tubes, and the impact is applied to the adjacent mass. Compared to conventional methods, there is significantly less absorption and weakening caused by heat.

Furthermore, according to the configuration of the present invention, when the hammering method is adopted and applied to a horizontal piping heat exchanger, the hammer driving device is significantly simplified and extremely efficient dust removal action can be performed. Since the tube plate itself is used as a medium to transmit the impact of the hammer to the heat transfer tube, the configuration is further simplified, and other effects that could not be achieved with conventional equipment are achieved. Demonstrate.

Although the hammer device in the present device has been described using as a preferred example a type in which the hammer 7 is swung down by the rotation of the rotary shaft 8, the hammer device is of course limited to the type described above. Needless to say, a vibrator device, etc., which is normally used as a vibration source, is also included in the scope of the hammer device.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the conventional device, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view of the proposed device, and Fig. 4 is a sectional view taken along the - line in Fig. 3. be. 1, 11... Main body, 2, 12... Heat exchanger tube, 3,
4, 13, 14... Header, 5, 17... Hanging fitting, 6, 18... Rod, 6a... Branch piece, 7...
Hammer, 8... Rotation axis, 9... Arm, 10, 19
... End, 15 ... Tube sheet, 16 ... Beam, 20
……motor.

Claims (1)

[Scope of utility model registration request] In a heat exchanger in which heat exchanger tubes arranged horizontally are supported by a tube sheet, the heat exchanger tubes are divided into multiple sets according to their upper and lower positions, each set is supported by an independent tube sheet, and the tube sheet is used as a heat exchanger tube. A hammer for applying an impact to the end of each tube sheet in a direction along the plane to each of the tube sheets, which is suspended in a slanted manner by hanging fittings in order to enable rocking in orthogonal planes. A heat exchanger dust removal device equipped with a device.