JPS6361600B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device that applies vibration to a heat exchanger tube using a hammering force and removes dust attached to the heat exchanger tube, and particularly relates to a device that applies vibration to a heat exchanger tube using a hammering force and removes dust attached to the heat exchanger tube. This invention relates to a dust removal device for heat exchanger tubes, which is capable of effectively transmitting heat to the tubes, adjusts the timing of hammering depending on the state of dust adhesion, and completely removes dust from the entire heat exchanger.

[Conventional technology]

The converter emits high-temperature CO containing a large amount of dust.
Gas is generated. This high temperature CO gas is treated by the exhaust gas treatment device shown in FIG.

That is, high-temperature CO gas generated in the converter 1 is drawn into the hood 2 by the induced blower 6, cooled by the cooler 3, removed by dust removers 4 and 5, and sent to the switching damper 8. CO at the beginning and end of Yotsute blowing
The exhaust gas with a low concentration is combusted at the top of the chimney 7 and then released into the atmosphere, and the exhaust gas with a high concentration of CO at the peak of blowing is collected in the gas holder 9 as a valuable gas.

In order to recover the heat retained in this high-temperature exhaust gas,
A contact heat transfer surface 11 is arranged within the cooler 3 .

[Problem to be solved by the invention]

By the way, since the exhaust gas emitted from the converter mentioned above contains a large amount of dust, this dust is
As shown in the figure, once the dust 14 starts to adhere to the heat transfer tube 13, the cooling effect deteriorates.
Further adhesion grows to form heat exchanger tubes 13 as shown in FIG.
It blocks the space between.

This blockage due to dust will block the contact heat transfer surface 11, and the gas generated from the converter 1 will be
The skirt 1 was not completely attracted by the induced fan 6.
High temperature CO gas will blow out from the gap between converter 2 and converter 1, posing an explosion and danger to humans.

Installing a contact heat transfer surface in a converter exhaust gas treatment device as described above is associated with operational risks.

Conventionally, in order to reduce dust adhesion to heat transfer tubes, heat transfer tubes were suspended along the flow of exhaust gas.
The heat transfer tubes were sometimes vibrated to remove dust, but since the flow is parallel, the heat recovery rate is poor and a contact heat transfer surface with a large heat transfer surface is required, increasing the risk accordingly. There was a technical problem.

Therefore, the present invention aims to completely remove the dust attached to the heat exchanger tubes so that the heat exchanger tubes are disposed perpendicular to the gas flow and can be used as a contact heat transfer surface with high heat exchange efficiency. The purpose of this invention is to provide a dust removal device that can remove dust.

[Means to solve the problem]

In order to solve the above problems, the heat exchanger tube dust removal device according to the present invention is arranged in a heat exchange section of a converter exhaust gas treatment device consisting of horizontally arranged heat exchanger tubes, and is installed at any point in the longitudinal direction of the heat exchanger tubes, which are vertically separated from each other. It consists of a plurality of impact force transmitting devices, one each installed at An impact conduction tube that forms a cooling water flow path and has an impactor attached to one end thereof is passed through the casing and passed between the heat exchanger tubes to penetrate the heat exchanger, and a seal box is attached to the penetration part of the casing. , both ends of the impact conduction tube are sealed with the seal box via an impact buffer member, and an impact force is transmitted to each heat exchanger tube by an impact transmission member provided on the impact conduction tube; The device has an arm on a rotating shaft, a mallet is rotatably attached to the arm, and by changing the arm mounting angle, it is possible to adjust mutual hammering timing, and depending on the rotation speed of the shaft, It is characterized in that the hammering speed can also be adjusted.

[Effect]

According to the dust removing device according to the present invention configured as described above, by arbitrarily changing the angle at which the arm is attached to the rotating shaft of the striking device, the timing of striking the hammers of the two sets of striking devices can be changed. Moreover, by changing the rotational speed of the rotating shaft, the speed at which the hammer is struck can be changed. Further, the impact force applied to the impactor by hammering is transmitted to the impact conduction tube by the deflection of the impact buffer member, and the impact force on the casing is buffered. The impact force transmitted to the impact transmission tube is transmitted to the heat exchanger tube as vibration force by the impact transmission member. This vibration causes the dust adhering to the heat transfer tube to be detached, carried by the exhaust gas flow, and removed by a downstream dust remover.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a heat exchanger tube dust removal apparatus according to the present invention will be described with reference to the drawings. The dust removal device consists of an impact force transmission device and a striking device. First, the details of the impact force transmission device will be explained with reference to FIG.
is an impact conduction tube bent into a U-shape, and an impactor 16 is attached to one end thereof via a connecting member 20. This U-shaped impact conduction tube 15 passes between the heat exchanger tubes 13 and penetrates the casing 23, and its both ends are connected to the impact buffer member 18 in a seal box 19 provided in the penetrating portion of the casing 23.
is sealed through. Therefore, the impact force applied to the impactor 16 is transmitted to the impact conduction tube 15 by the deflection of the impact buffer member 18, and the impact force applied to the casing 23 is buffered.

The impact force transmitted to the impact transmission tube 15 in this manner is transmitted to the heat exchanger tube 13 as a vibration force by the impact transmission member 17. This impact transmission member 17 is
In the case of this embodiment, as shown in FIG. 5, the heat transfer tube 13 is fixed to the shock conduction tube 15 so as to be sandwiched therebetween using a disk.

In addition, 21 is a sealing member that makes the impact conduction pipe 15 slidable and seals the through hole of the casing 23, and 22 is a sealing lid that connects the inert gas supply pipe 2.
4, the seal box 19 is filled with inert gas to prevent the gas inside from leaking to the outside. Also, cooling water flows inside the shock conduction pipe 15 as shown by arrows A and B, so that it can withstand high temperature exhaust gas.

Next, the impact device corresponding to the impact force transmission device will be explained with reference to FIG.
It is rotatably connected to the arm 27. The arm 27 is fixed to a shaft 28 supported by a bearing 34, as shown in FIG. The shaft 28 is rotated by a drive 33. 29,30,3
1 and 32 are transmission devices for transmitting the rotation of the drive device 33 to the shaft 28. In the case of this embodiment, two sets of impact devices corresponding to two sets of impact force transmission devices are driven by one drive device 33. Further, as shown in FIG. 6, by arbitrarily changing the angle at which the arm is attached to the shaft 28, the striking timing of the hammers 25, 25' of the two sets of striking devices can be changed. In the case shown in the figure, the mallet 25' has already finished striking the impactor 16 and is in the next operation, and the mallet 25'
5 is in a state where the impactor 16 is struck.

To explain the operation of the dust removing device of the embodiment configured as described above, first, as shown in FIG.
is installed. During this installation, the arm 2
Adjust the mounting angle of 7 to balance the impact force transmission devices C to H.

For example, C and D are the parts where dust is most likely to adhere.
If this is the case, the rotational speed of the driving device 33 for C and D is increased, and the angle of the arm 27 of the striking device is changed so that the timing of hammering is continuous for C and D.
Alternatively, taking into consideration the interference with the natural frequency of the heat exchanger tubes 13, the timing is adjusted so that the entire heat exchanger is not damaged by vibration and the dust is likely to fall.

After adjusting the timing of hammering in this way, for example, the driving device 33 may be driven in the order of C, D, E, F, G, H, or C and D may be driven simultaneously depending on the situation. Hit a target with a hammer. This hammering force is transmitted as vibration force to the transmission pipe 13 by the impact force transmission device shown in FIG. That is, the impact force applied to the impactor 16 by hammering is transmitted to the impact conduction tube 15 by the deflection of the impact buffer member 18, and the impact force on the casing 23 is buffered. The impact force transmitted to the impact conduction tubes 15 is transmitted as a vibration force to each heat exchanger tube 13 by the impact transmission member 17, as shown in FIG. The dust released by this vibration is
The first
Dust is removed by dust removers 4 and 5 shown in the figure. Or,
By constantly vibrating the contact heat transfer surface 11 by operating the drive device 33, the dust is removed from the heat transfer tube 13.
carried by the exhaust gas stream without adhering to the

〔Effect of the invention〕

As detailed above, according to the dust removing device according to the present invention, the hammering timing of the two sets of striking devices can be adjusted by arbitrarily changing the angle at which the arm is attached to the rotating shaft of the striking device. Furthermore, by changing the rotational speed of the rotating shaft, the hammering speed can be changed. Further, the impact force applied to the impactor by hammering is transmitted to the impact conduction tube by the deflection of the impact buffer member, and the impact force on the casing is buffered. The impact force transmitted to the impact transmission tube is transmitted to the heat exchanger tube as vibration force by the impact transmission member. This vibration causes the dust adhering to the heat transfer tube to be detached, carried by the exhaust gas flow, and removed by a downstream dust remover.

In particular, since the impact conduction tube applies an impact to one point in the longitudinal direction of the heat exchanger tube, the impact needs to be small enough to remove dust, and the impact transmitted to the heat exchanger tube by each impact conduction tube is small enough to remove dust. In addition to being random in the longitudinal direction, together with adjusting the hammering timing of the striking device, dust can be effectively removed, and the striking device can be downsized.

Furthermore, the seal box prevents poisonous and explosive high temperature CO gas (exhaust gas) from escaping from the casing, and also buffers the impact from the striking device from being transmitted to the casing.

In addition, the heat transfer tube is not affected by the difference in thermal expansion between the shock conduction tubes, and the shock conduction tubes can withstand high-temperature exhaust gas because cooling water flows through them.

[Brief explanation of drawings]

Figure 1 is a schematic diagram of the entire converter exhaust gas treatment equipment;
2 and 3 are longitudinal cross-sectional views showing how dust adheres to heat transfer tubes, FIG. 4 is a side view showing the impact force transmission device in the dust removal device of the present invention, and FIG.
The figure is a view taken along the line X-X in FIG. 4, FIG. 6 is a side view of the striking device in the dust removal device of the present invention, FIG. 7 is a view taken along the line Y-Y in FIG. 6, and FIG. 8 is a contact view. FIG. 9 is a schematic diagram showing a state in which the impact force transmission device is attached to the heat transfer surface, and FIG. 9 is a plan view taken along the Z-Z arrow in FIG. 8. DESCRIPTION OF SYMBOLS 11...Contact heat transfer surface, 13...Heat transfer tube, 15...Impact conduction tube, 16...Impactor, 17...Impact transmission member, 1
8... Impact buffering member, 19... Seal box, 23
...Casing, 25, 25'...Mallet, 27...Arm,
28... Rotating shaft, 33... Drive device.

Claims (1)

[Claims] 1. A plurality of impact force transmission devices installed at arbitrary positions in the longitudinal direction of the heat exchanger tubes and separated vertically in the heat exchange part of the converter exhaust gas treatment equipment consisting of horizontally arranged heat exchanger tubes, and the impact force It consists of a striking device that alternately hammers the transmission device, and the impact force transmission device is bent into a U-shape to match the arrangement pitch of the heat transfer tubes to form a cooling water flow path, and an impactor is attached to one end of the impact force transmission device. A shock conduction tube consisting of the structure is passed through the casing and the heat exchanger through the space between the heat transfer tubes, and a seal box is attached to the penetration part of the casing.
Both ends of the impact conduction tube are sealed with the seal box via an impact buffer member, and an impact force is transmitted to each heat exchanger tube by an impact transmission member provided on the impact conduction tube. By installing an arm on the rotating shaft, rotatably attaching a mallet to the arm, and changing the arm installation angle,
A heat exchanger tube dust removal device characterized in that mutual hammering timing can be adjusted and hammering speed can also be adjusted by adjusting the rotational speed of a shaft.