JPS61243298A - Shell and tube type heat exchanger - Google Patents

Abstract

PURPOSE:To permit cleaning of internal surfaces of tubes and the continuous operation of the heat exchanger by a method wherein an endless linear body, passing through the inside of two pieces of tube and being wound around pulleys located at both sides of the axial directions of the tubes respectively, is provided in all of the tubes while a brush is fixed to respective linear bodies and the liner bodies are turned through the pulleys. CONSTITUTION:Dirty gas flows into the heat exchanger through a gas inlet port 4 and flows out of a gas outlet port 7. On the other hand, refrigerant flows into the heat exchanger through a refrigerant inlet port 6 and flows out of a refrigerant outlet port 5. Accordingly, the heat exchange between the dirty gas and the refrigerant is effected during passing through the tubes 9 and the dirty gas is cooled. In this case, substances in the dirty gas are adhered to and accumulated on the internal surfaces of the tubes 9. When a motor is operated upon proper timing to turn the pulleys 11, the linear bodies 10 are turned and the brushes 13 pass through the tubes 9 alternately, therefore, the substances on the internal surfaces of the tubes 9 are scraped off and are flowed out of a dust outlet port 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to shell-and-tube heat exchangers.

2. Description of the Related Art Conventionally, a heat exchanger has not been used to cool or heat dirty gas containing substances that may adhere to heat transfer surfaces. That is, such gases are either released into the atmosphere without undergoing heat exchange, or are passed to a downstream device.

Problems to be Solved by the InventionHowever, 5. For example, the waste gas discharged from a glass melting furnace contains boric acid, and if it is discharged as it is from the chimney, it will cause pollution. It is necessary to install a heat exchanger as a container, and after cooling, separate the precipitated boric acid using a cyclone dust collector and release it into the atmosphere. In this case, boric acid will precipitate on the heat transfer surface of the heat exchanger. When it is absolutely necessary to exchange heat with dirty gas like this, it is necessary to frequently stop and clean the heat exchanger.

SUMMARY OF THE INVENTION An object of the present invention is to provide a shell-and-tube heat exchanger that solves the problems of the conventional art.

Means for Solving the Problems In order to solve the above problems, the shell-and-tube heat exchanger of the present invention passes through the inside of two tubes and is wound around pulleys located on both sides of the tubes in the axial direction. A plurality of twisted endless linear bodies are provided so that one linear body penetrates through all the tubes, and a brush that can come into contact with the inner surface of the tube is fixed to each of these linear bodies, The structure includes a drive device that rotates the linear body via the pulley.

Operation According to the above configuration, when the pulley is rotated by the drive device, the linear body rotates, and the brush attached to the leg of the linear body scrapes off the adhered substances on the inner surface of the tube. Therefore, the inner surface of the tube can be cleaned with the brush, and the shell-and-tube heat exchanger does not need to be stopped frequently, allowing continuous operation.

Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Fig. 1 is a schematic cross-sectional view of a shell and tube heat exchanger according to an embodiment of the present invention. The casing (1) has a gas inlet (4) that communicates with the space (2), a refrigerant outlet (5) that communicates with the space (2), and a refrigerant population ( 6), and a gas outlet (7) and a dust outlet (8) communicating with the space (Q).In the space (2), both ends of one are inserted into the holes of the partition walls (2) and (3). A large number of fixed tubes (9) are arranged as shown in Figure 2, and a plurality of baffle plates (not shown) are installed to make the refrigerant meander. In order to make the drawing clear, four tubes (9) are shown in the horizontal direction of the figure, but in reality, six tubes (9) are arranged at appropriate intervals as shown in Figure 2. In other words, inside the casing (1),
As shown in Figure 2, six tubes (9) are arranged in six rows, making a total of 86 tubes (91).The number of tubes (9) to be installed can be determined arbitrarily. Bye.

Said tube +9) is two adjacent tubes (9)
is one set, and for each set of tubes (9), there is one endless linear body αQ made of wire rope or chain, and two pieces located on both sides of the tube (9) in the axial direction. Pulleys (6) (goods) are provided respectively. The linear body αG is wound around the pulley αη, and one brush 4 having an outer diameter approximately equal to the inner diameter of the tube (9) is fixed to each linear body (10). .The above pulley α is old.

As shown in FIG. 2, each row is externally fixed to a common rotating shaft σ4, and each rotating shaft σ◆ is individually driven by an electric motor (G) as a driving device. The rotating shaft Q4 is rotatably supported at both ends by bearings αQv) located outside the casing (1), and
1) is connected to the output shaft of the electric motor (to) located outside. Note that the pulley (material) may be driven by an electric motor (g).

The operation of the above configuration will be explained below. Dirty gas flows into the space prisoner through the gas inlet (4) and into the tube (9).
), the refrigerant reaches the space (0), flows out from the gas outlet (7), and reaches, for example, a downstream dust remover.On the other hand, the refrigerant flows into the space CB from the refrigerant inlet (6) and passes through the baffle plate (not shown in Figure 1). The refrigerant flows out from the refrigerant outlet (5) in a meandering manner. Therefore, the dirty gas exchanges heat with the refrigerant while passing through the tube (9) and is cooled. At this time, substances in the dirty gas adhere and accumulate on the inner surface of the tube (9). Therefore, operate the electric motor (g) as appropriate,
When the pulley (B) is rotated.

As the linear body 01m rotates and the brushes 4 alternately pass through the inside of the tube (9), the substance on the inner surface of the tube (9) is scraped off by the brush □, and the dust outlet (8 ). In addition, the drive of the pulley (6) is as follows.
This may be performed sequentially for each column, or may be performed all at the same time. Further, the above-mentioned cleaning may be performed as appropriate depending on the state of accumulation of substances on the inner surface of the tube (9), and may be performed periodically or constantly.

In this way, since the inner surface of the tube (9) can be automatically cleaned by the brush □□□, continuous operation of the heat exchanger is possible without frequently stopping the operation, greatly increasing the operating efficiency. I can do it.

In the above embodiment, an electric motor (g) was used as the drive device, but it goes without saying that the configuration is not limited to this.

Further, in the above embodiment, one endless linear body αO
Although one brush 4 is attached to the holder, a plurality of brush holders may be attached.

Further, in the above embodiments, a vertical shell-and-tube heat exchanger has been described as an example, but the present invention can of course be applied to a horizontal shell-and-tube heat exchanger.

Effects of the Invention As stated above (according to the present invention, the inner surface of the tube can be automatically cleaned, there is no need to stop the operation of the heat exchanger as frequently as in the past, continuous operation is possible, and operation efficiency is improved. In addition, since the endless linear body was made to pass through two tubes and the brush was fixed to this linear body, rotational force was simply applied to the linear body through the pulley. The brush can be moved simply by applying the force, and the brush drive mechanism can be configured simply.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a shell-and-tube heat exchanger according to an embodiment of the present invention, and FIG.
It is a schematic sectional view along the -1 line. (9)--tube, αct--linear body, east exit...
・Pulley, Q3-brush, (g) ・Shaft motor

Claims (1)

[Claims] One linear body passes through each tube through an endless linear body that passes through the inside of one or two tubes and is wound around a pulley located on both sides of the tube in the axial direction. A shell and tube characterized in that a plurality of these linear bodies are provided, a brush that can come into contact with the inner surface of the tube is fixed to each of these linear bodies, and a drive device that rotates the linear bodies via the pulley is provided. type heat exchanger.