JP2000193394A - Dust adherence prevention device of tubular heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the dust adherence prevention device of a tubular heat exchanger that is simple in structure and is advantageous in terms of time and economy. SOLUTION: In a device, a support 3 is provided at the upper part of a number of tubes 2 being arranged in the vertical direction of a tubular heat exchanger 1. In this case, link chain 6 where an upper end is connected to the support 3 and a lower end is drooped downward as compared with the tube 2 is suspended in each tube 2, and at the same time a driving device 7 is provided to transfer up and down movement onto the link chain 6 via the support 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing so-called dust adhering to the inside of a tube of a tube heat exchanger and for preventing the adhesion of dust to the tube.

[0002]

2. Description of the Related Art Generally, a tube type heat exchanger performs heat exchange by indirectly contacting a high-temperature gas and a low-temperature gas through a tube. At this time, dust adheres to the inside of the tube. However, the adhesion of the dust causes blockage of the tube through which the processing gas fluid passes, resulting in a significant decrease in heat exchange efficiency, and the inability to maintain the original performance of the heat exchanger.

By the way, the dust adhering to the inside of the tube is an extremely fine dust contained in the processing gas fluid flowing through the heat exchanger, and the dust particles gradually adhere to and accumulate in the tube. This is seized by the high temperature and becomes solid, eventually leading to blockage of the inside of the tube.

[0004] Further, dust tends to gradually adhere from the inlet side and the outlet side of the tube. In a heat exchanger usually used in a garbage incineration facility or the like, dust is generated once every one to two months. Although the removal operation was required, the removal operation has conventionally been performed manually using a device such as an electric rotary brush or a high-pressure air blow.

[0005] However, in the conventional manual removal operation, when the heat exchanger is stopped, for example, in the operation of removing the heat exchanger in the refuse incineration facility, the operation of the refuse incineration facility itself must be stopped. Due to the high temperature operation, a cooling period of at least one day is required for humans to enter the equipment and perform the removal work. Therefore, it is necessary to complete the dust removal work and resume operation of the waste incineration facility. They had to shut down for at least three days.

[0006]

In the conventional dust removing operation of the tubular heat exchanger, the operation of the entire facility to which the heat exchanger is attached must be stopped. It was extremely disadvantageous.

[0007]

According to the present invention, there are provided a plurality of tubes 2 arranged in a longitudinal direction of a tube heat exchanger 1, a support 3 provided above the tubes 2, and a support at the upper end. 3, a link chain 6 suspended from each tube 2 with its lower end hanging down from the tube 2 and a driving device 7 for transmitting vertical movement to the link chain 6 via the support 3. It becomes.

[0008] A large number of tubes 2 arranged in the longitudinal direction of the tube heat exchanger 1, a support 3 bridged in parallel above the tubes 2 in each row, and an upper end connected to the support 3 The link chain 6 has a lower end hanging down from the tube 2 and suspended in each tube 2, and a driving device 7 for transmitting vertical movement to the link chain 6 via the support 3. There may be.

A plurality of tubes 2 arranged in the longitudinal direction of the tube type heat exchanger 1, and a supporting arm 5 which is bridged in parallel above the tubes 2 at appropriate intervals and extends over a plurality of rows of tubes 2. And a link chain 6 whose upper end is connected to the support arm 5 of the support 3 and whose lower end is hung below the tubes 2 and suspended in a plurality of rows of tubes 2. 6, a driving device 7 that transmits vertical movement via the support 3 is also conceivable.

A plurality of tubes 2 arranged in the longitudinal direction of the tube type heat exchanger 1 are laid in parallel above the tubes 2 at appropriate intervals, and both ends are rotatably mounted on the shaft 4. A support arm 3 extending on both sides with a support arm 5 extending over a plurality of rows of tubes 2, an upper end connected to the support arm 5 of the support body 3, and a lower end hanging down below the tubes 2 to form a plurality of rows of tubes. A link chain 6 suspended in 2;
It is advantageous to have a structure including a driving device 7 that transmits the up-and-down motion by reciprocatingly rotating the support 3 to the link chain 6.

[0011]

In this way, a drive device such as an electric motor or an air cylinder is started to move a support member that quickly connects the upper end of the link chain, thereby moving the link chain up and down inside the tube. At this time, the driving device is operated by setting a condition with a timer such that the link chain moves up and down, for example, up and down at a rate of once per second according to the surrounding conditions such as the diameter of the tube. It is.

The link chain that moves up and down inside the tube includes a vertical movement of the link chain, a gap between a number of ring-shaped elements constituting the link chain, and
Combined with the wind pressure of the gas fluid passing through the tube,
The link chain itself causes a complicated motion other than the up and down motion, that is, an irregular motion such as a rolling motion, a circumferential motion, or a bouncing motion, and collides with various parts inside the tube.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a heat exchanger which is in contact with a flow path A in which a number of tubes 2 are arranged in a longitudinal direction and an outer surface of the tube 2 of the flow path A. And a flow path B.

3 is laid in parallel above the tube 2 at an appropriate interval, and each end is rotatably mounted on a shaft 4.
In the support 3, the center of the support arm 5 corresponding to the number of tubes 2 along the axial direction of the support 3 is fixed to the support 3, and the support arm 5 is stretched on both sides of the support 3. ing.

Reference numeral 6 denotes a link chain which is inserted into the tube 2 so as to be movable up and down. The upper end of a plurality of rows of link chains 6 extending in the axial direction of the support 3 is connected to the corresponding support arm 5 and the lower end. Hangs below the tube 2.

Reference numeral 7 denotes an electric motor or a driving device such as an air cylinder which transmits a reciprocating rotational motion at a predetermined angle to the support 3, and which reciprocates the rotational motion about the axis so that the swing angle can be adjusted. As a result, the support arm 5 moves in a seesaw motion, and the link chain 6 linked to the support arm 5 moves up and down. A universal joint 8 is interposed between the driving device 7 and the support 3, and the elongation and the shaft It corresponds to the misalignment of the mind.

In the embodiment shown in the drawings, a driving device such as an electric motor or an air cylinder is started to transmit a reciprocating rotational movement to a support to cause a seesaw motion of a support arm, and to connect a link chain connected to the support arm to a tube. Is moved up and down, but it is clear that the same operation and effect can be obtained even if the support or the support arm is moved up and down directly.

[0018]

As described above, according to the present invention, the link chain is suspended from above with all the tubes arranged in the longitudinal direction of the tube heat exchanger with the lower end hanging down from the tube. The link chain is moved up and down, and the movement of the link chain is not a simple up and down movement, but is extremely irregular due to the gap between the ring-shaped elements and the wind pressure of the gas fluid. It removes dust adhering to the inside of the tube by colliding with various places inside the tube, and also prevents dust from adhering to the inside of the tube.Because these operations are performed during operation of the heat exchanger, This is extremely advantageous both in terms of time and economy.

[Brief description of the drawings]

FIG. 1 is a side view schematically described.

FIG. 2 is a vertical sectional front view showing details of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube type heat exchanger 2 Tube 3 Support body 4 Axle attachment part 5 Support arm 6 Link chain 7 Drive device

Claims (4)

[Claims] 1. A plurality of tubes (2) arranged in a longitudinal direction of a tube heat exchanger (1), a support (3) provided above the tubes (2), and a support at an upper end. A support (3) is connected to a link chain (6) suspended in each tube (2) with its lower end hanging down from the tube (2) and connected to (3). And a driving device (7) for transmitting vertical movement through the device. 2. A plurality of tubes (2) arranged in the longitudinal direction of the tube heat exchanger (1), and a support (3) bridged in parallel above the tubes (2) in each row. )When,
A link chain (6) having an upper end connected to the support (3) and a lower end hanging down from the tube (2) and suspended in each tube (2);
Drive unit (7) for transmitting vertical movement via support (3)
Dust adhesion prevention device for tube type heat exchanger. 3. A plurality of tubes (2) arranged in the longitudinal direction of the tube heat exchanger (1), and are arranged in parallel above the tubes (2) at appropriate intervals and in a plurality of rows. A support (3) having a support arm (5) extending over the tube (2), an upper end connected to the support arm (5) of the support (3), and a lower end hanging down from the tube (2). It comprises a link chain (6) suspended in a plurality of rows of tubes (2) and a drive unit (7) for transmitting vertical movement to the link chain (6) via a support (3). Dust adhesion prevention device for tube heat exchanger. 4. A plurality of tubes (2) arranged in the longitudinal direction of the tube heat exchanger (1), and are arranged in parallel above the tubes (2) at appropriate intervals in parallel. Rotatably attached to the shaft (4) and a plurality of rows of tubes (2)
(3) with a support arm (5) extending over both sides
A link chain (6) having an upper end connected to the support arm (5) of the support (3) and a lower end hanging down from the tube (2) and suspended in a plurality of rows of tubes (2). ,
A dust adhesion preventing device for a tube type heat exchanger, comprising: a driving device (7) for transmitting a vertical motion by reciprocatingly rotating a support (3) to a link chain (6).