JPH0420550Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for removing scale attached to the inner wall of an electrolyte heat pipe, and particularly relates to an improvement thereof.

[Prior Art] Conventionally, this type of equipment involves inserting a stainless steel tube with an outer diameter of approximately 1/3 of the inner diameter of the tube into a tube on which scale has adhered, and then supplying pressurized water through the stainless steel tube. A device is known that is configured to spray pressurized water into a tube to remove scale from the inner wall of the tube, which has been previously washed with a cleaning agent (for example, NaOH).

[Problems to be Solved by the Invention] However, the above-mentioned apparatus has a problem in that the scale cannot be completely removed because the scale is removed only by water pressure.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a device for removing scale from the inner wall of an electrolyte heat pipe, which has a simple structure and can completely remove scale.

[Means for solving problems]

In order to solve the above problems, the apparatus for removing scale from the inner wall of an electrolyte heat pipe according to the present invention has a nozzle part 3 protruding from the tip of a cylindrical main body part 2, and an outer periphery of the nozzle part 3. A spray nozzle 1 has a shape in which a plurality of injection ports 4 are protruded in the radial direction, and sprays fluid at a pressure of 50 to 150 kg/cm ² onto the inner wall of the tube where scale is attached; A flexible fluid supply pipe 5 that supplies fluid to the spray nozzle 1; and a substantially rectangular shaft disposed in a circular shape at a constant interval from each other on the outer peripheral wall of the main body 2 of the spray nozzle 1. It is composed of a plurality of plates long in the direction, each outer peripheral wall surface of which is curved concentrically with the main body part 2 of the spray nozzle 1, and each of its tip parts has a shape that protrudes further in the tip direction than the tip of the nozzle part 3. a plurality of cutting tools 11 having a plurality of cutting tools 1;
It is characterized by being located at an interval of 1.

[Effect]

In the present invention, the nozzle portion 3 of the spray nozzle 1 is inserted into the tubular body of the electrolyte heat pipe, and the fluid is sprayed in the radial direction from the injection port 4 at a pressure of 50 to 150 kg/cm ² .

Then, the scale on the inner wall of the tube is scraped off by the tip of each cutting tool 11, and at the same time, it is removed by the jet of the pressure fluid.

The removed scale is transferred to each cutting tool 11 along with the fluid.
is discharged through an interval of

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 3.

The device for removing scale from the inner wall of a pipe according to the present invention includes:
It includes a spray nozzle 1 that sprays fluid, and a blade 10 installed on the outer circumferential side of the spray nozzle 1 that removes scale.

The spray nozzle 1 includes a cylindrical main body 2 having a stepped portion, and a truncated conical nozzle 3 provided at the tip of the main body 2. A plurality of injection ports 4 are bored in the side circumference of the nozzle part 3, and the main body part 2
The nozzle portion 3 communicates with a flexible fluid supply pipe 5 connected to the rear end. This fluid supply pipe 5 has a weight of 50 to 150 kg/kg.
A fluid such as water having a pressure of cm ² is supplied, and the fluid is injected from the injection port 4 of the nozzle portion 3 toward the inner wall of the tube body.

The blade 10 is composed of a plurality of cutting tools 11, and each blade 911 is fixed to the stepped portion of the main body 2 at a predetermined interval so as to surround the main body 2. The blade 11 is a substantially rectangular plate curved to match the cylindrical shape of the main body 2 and the inner wall of the tube into which the device is inserted, and the outer diameter of the blade 10 is approximately equal to the inner diameter of the tube. It is composed of Further, the tip of each cutting tool 11 is formed into a wedge shape so that it can scrape off scale by coming into contact with the inner wall of the tube body.

Next, referring to FIG. 3, a procedure for removing scale from the inner wall of a tube using this device will be explained.

Here, a heat pipe 20 of a shell-and-tube heat exchanger used to adjust the temperature of an electrolytic solution in copper refining will be taken as an example. An electrolytic solution containing H ₂ SO ₄ as a main component is passed through the heat pipe 20.
The electrolytic solution is heated to a predetermined temperature by the above-mentioned heat from the boiler. It is assumed that a scale 22 mainly composed of CaSO ₄ containing As, Sb, Bi, etc. generated as the heat exchanger operates is attached to the inner wall 21 of the heat pipe 20.

First, inside the heat pipe 20 as a pipe body,
Fill with NaOH and leave it for about 2 days, scale 2
Thoroughly soak 2 in NaOH. After removing NaOH, the scale removing device is inserted into the heat pipe 20 and pressed, and a fluid having a pressure of 50 to 150 kg/cm ² is supplied to the fluid supply pipe 5. The scale 22 adhering to the inner wall 21 of the heat pipe 20 is scraped off by the tip of each cutting tool 11, and is also reliably removed from the inner wall 21 by the high pressure fluid injected from the nozzle part 3.

During the removal work, it is conceivable that the scale 22 scraped off may become clogged in the heat pipe 20, making it impossible to continue scraping off the scale 22 with the blade 10. However, in this embodiment, the blade 1
0 is composed of a plurality of cutting tools 11, each cutting tool 11
There is pressurized fluid and scraped scale 22 in between.
Since there is a gap to allow the particles to escape backwards, the removal work continues without interruption.

The heat pipe 20 to be cleaned in this embodiment is a straight pipe, but since the fluid supply pipe 5 in this embodiment is made of a flexible material, The scale removing device of this embodiment can also be applied to the above. Further, the work of pressing the scale removing device in the heat pipe 20 to scrape off the scale 22 may be performed by a worker operating the fluid supply pipe 5;
This may be done using some kind of drive device. Further, in this embodiment, the blade 10 has six cutting tools 11.
However, the number, shape, arrangement interval, etc. of the cutting tools 11 can be set as appropriate depending on the inner diameter of the pipe to be cleaned, the nature of the scale, the state of its adhesion, etc.

[Effect of idea]

As explained above, according to the apparatus for removing scale from the inner wall of an electrolyte heat pipe according to the present invention, the nozzle part 3 is provided protrudingly from the tip of the cylindrical main body part 2 of the spray nozzle 1, and the nozzle A plurality of injection ports 4 are drilled in the outer peripheral part of the part 3 in the radial direction, and fluid is injected in the radial direction from the injection ports 4 at a pressure of 50 to 150 kg/cm ² . The scale on the internal body wall can be directly removed by the above-mentioned injection of the pressurized fluid, and the scale can be efficiently scraped off at the same time by the cutting edges of the plurality of cutting tools 11 disposed on the outer peripheral wall of the main body 2. It has the effect of removing.

Further, according to the present invention, a plurality of cutting tools 11 each made of a plurality of substantially rectangular plates long in the axial direction are arranged on the outer peripheral wall of the cylindrical main body 2 of the spray nozzle 1 at regular intervals. The spray nozzles 1 are arranged in a circle, and the plurality of injection ports 4 of the spray nozzles 1 are positioned at intervals between the protruding tips of the respective cutters 11.
The scale and fluid scraped off by the tip of the blade and simultaneously removed by the pressure fluid are removed by each blade 11.
The scale is easily discharged downstream through the interval, and the pipe body is not clogged by the removed scale.

Further, each of the plurality of cutting tools 11 is provided such that its circular outer peripheral wall protrudes radially outward from the outer peripheral wall of the cylindrical main body 2 of the spray nozzle 1, and a space is formed between each of the cutting tools 11. Because of this, the contact area with the inner wall surface of the tube is small, and the frictional resistance during scale removal work is also reduced, making it possible to perform the scale removal work easily.

Therefore, according to the present invention, an excellent effect can be obtained in that the scale removal work on the inner wall of the electrolyte heat pipe can be carried out efficiently and in a short time.

[Brief explanation of the drawing]

Fig. 1 is a front view of a device for removing scale from the inner wall of a tube which is an embodiment of the present invention, Fig. 2 is a right side view of Fig. 1, and Fig. 3 is a diagram of the same embodiment inserted into a heat pipe. It is a partial sectional view showing a scale removing device. 1...Spray nozzle, 5...Fluid supply pipe, 1
0...blade, 11...cutting tool, 20...heat pipe as a pipe body, 21...inner wall, 22...scale.

Claims (1)

[Claims for Utility Model Registration] A shape in which a nozzle part 3 is protruded from the tip of a cylindrical main body part 2, and a plurality of injection ports 4 are bored in the outer peripheral part of the nozzle part 3 in a radial direction. a spray nozzle 1 which injects fluid at a pressure of 50 to 150 Kg/cm ² onto the inner wall of the tube on which scale is attached; a flexible fluid supply pipe 5 that supplies fluid to the spray nozzle 1; The main body 2 of the nozzle 1 is made up of a plurality of substantially rectangular axially long plates disposed in a circle at regular intervals on the outer circumferential wall of the main body 2 of the nozzle 1, and each outer circumferential wall of the plate is arranged in a circular manner at regular intervals. A plurality of cutting tools 11 are curved concentrically with the nozzle section 2, and each tip thereof has a shape that protrudes further in the distal direction than the tip of the nozzle section 3, and the plurality of injection ports 4 is the plurality of cutting tools 1
1. A device for removing scale on the inner wall of an electrolyte heat pipe, characterized in that the devices are located at intervals of 1.