JP2003024758A - Pipe interior washing fluid mixer and pipe interior washing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pipe interior washing fluid mixer capable of using washing particles wetted with a liquid as an abrasive material. SOLUTION: The pipe interior washing fluid mixer is constituted so as to discharge an abrasive material-containing gas-liquid mixed fluid to be sent into a pipe to be washed to a discharge port in order to remove the adherend on the inner wall surface of the pipe to be washed and equipped with a first flow channel receiving the supply of air, a second flow channel receiving the supply of the abrasive material, a third flow channel receiving the supply of a pressurized liquid, a first nozzle for discharging the air mixed abrasive material by sucking the abrasive material from the second flow channel using the air from the first flow channel as an operation fluid and a second nozzle for discharging an air-liquid mixed fluid to the discharge port by sucking the air mixed abrasive material from the first nozzle using the pressurized liquid from the third flow channel as an operation fluid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning facility for an inner wall surface of a water pipe or the like, and for example, cleaning particles to be used when cleaning is conducted by connecting to a water pipe such as an internal pipe of a cooler using river water. And a cleaning fluid.

[0002]

2. Description of the Related Art Conventionally, there has been a water pipe inner wall surface cleaning device for cleaning the inside of a heat exchanger thin tube arranged inside an air cooler of a generator. This cleaning apparatus is an apparatus for sending cleaning particles, a liquid, and a gas under pressure into a pipe to be cleaned to remove deposits on a wall surface inside the pipe to be cleaned.

The main part of this apparatus is a mixer for pumping the above-mentioned cleaning particles, liquid and gas into the pipe to be cleaned. As the configuration of the mixer that sends out a mixed flow of cleaning particles, air, and water, in many cases, the cleaning particles supplied with compressed air and the cleaning particles at a position facing the cleaning fluid channel communicating with the pipe to be cleaned. An inflow pipe is provided, and the cleaning fluid flow path and the cleaning particle inflow pipe are coaxially arranged. A pressurized water inflow pipe for supplying pressurized water is provided from the side of this axis.

[0004]

As described above, the cleaning particles made of resin mixed in the compressed air need to be dried, and once used, they can be reused immediately because they are wet with water. It was necessary to always prepare dry cleaning particles and collect them until the cleaning of the pipe to be cleaned was completed.

It is an object of the present invention to obtain a mixer or an in-pipe cleaning facility which can use cleaning particles wet with liquid as an abrasive material. Further, it is an object of the present invention to obtain a mixer capable of improving the cleaning ability and shortening the cleaning time by improving the function of the mixer, or to obtain the in-pipe cleaning equipment.

[0006]

A pipe cleaning fluid mixer according to a first aspect of the present invention contains an abrasive material to be pressure-fed into a pipe to be cleaned in order to remove deposits on an inner wall surface of the pipe to be cleaned. An in-pipe cleaning fluid mixer that discharges a gas-liquid mixed fluid to a discharge port, the first flow path receiving a gas supply, the second flow path receiving a abrasive material, and the first flow path receiving a pressurized liquid. 3 flow paths, a first nozzle that discharges the gas-mixed abrasive material by drawing in the abrasive material from the second flow path using the gas from the first flow path as a working fluid, and the pressurized liquid from the third flow path. A second nozzle is provided as a working fluid for drawing the gas-mixed abrasive material from the first nozzle to discharge the gas-liquid mixed fluid to the discharge port.

According to a second aspect of the present invention, there is provided an in-pipe cleaning fluid mixer in which the abrasive material according to claim 1 contains cleaning particles made of synthetic resin and a liquid, and the abrasive material is introduced into the second flow path. It further comprises a positive displacement pump for pumping.

According to a third aspect of the present invention, there is provided a pipe cleaning fluid mixer according to the first or second aspect, in which the third flow passage is provided on the central axis and the outer periphery of the third flow passage is provided. A coaxial flow path having a second flow path having a circular flow path cross section, and a coaxially provided first flow path having a circular flow path cross section at the outer circumference of the second flow path, The first nozzle forms an annular discharge port with the outlet of the second flow passage on the inner peripheral side and the outlet of the first flow passage on the outer peripheral side as inlets, and the second nozzle forms the outlet of the third flow passage on the central axis. A concentric nozzle whose inlet is the annular discharge port of the first nozzle on the outer periphery of the nozzle is formed.

The pipe cleaning fluid mixer according to the invention described in claim 4 further comprises a rectifying means for imparting a swirling flow to the flow of the gas flowing from the first flow passage to the first nozzle. It is a thing.

According to a fifth aspect of the present invention, there is provided an in-pipe cleaning facility according to any one of the first to fourth aspects, in which the in-pipe cleaning fluid mixer is discharged from the discharge port of the mixer. It is provided with a means for introducing the gas-liquid mixed fluid into the pipe to be cleaned and a separation means for separating the solid particles in the abrasive material from the fluid after cleaning discharged from the pipe to be cleaned.

According to a sixth aspect of the present invention, there is provided an in-pipe cleaning equipment, wherein a swirling flow is applied to a fluid after cleaning, which is discharged from the inside of the pipe to be cleaned, on the upstream side of the separating means according to the fifth aspect. It further comprises a cyclone cleaning device for self-cleaning the solid particles therein.

The pipe cleaning equipment according to the invention described in claim 7 is further provided with a cleaning means for washing the solid particles during or after separation by the separation means according to claim 5 or 6 with water.

According to the eighth aspect of the present invention, there is provided an in-pipe cleaning facility, wherein the solid particles separated by the separating means according to any one of the fifth to seventh aspects are mixed as the abrasive material component in the in-pipe cleaning fluid. It is equipped with a recirculation means for circulating it to the container.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a first flow path for supplying a gas and a second flow path for supplying an abrasive material.
A flow path, a third flow path to which a pressurized liquid is supplied, and a first nozzle that discharges a gas-mixed abrasive material by drawing in the abrasive material from the second flow path using the gas from the first flow path as a working fluid. And a second nozzle which discharges the gas-mixed abrasive material from the first nozzle as a working fluid by drawing in the gas-mixed abrasive material from the first nozzle to the discharge port as the gas-liquid mixed fluid. Thereby, the cleaning particles wet with the liquid can be used as the abrasive material.

That is, the mixer of the present invention discharges the gas-liquid mixed fluid containing the abrasive material to be pressure-fed into the pipe to be cleaned in order to remove the deposits on the inner wall surface of the pipe to be cleaned. In particular, the negative pressure is applied at a point where the first flow path and the second flow path join together when the gas flows toward the discharge port by the first flow path to which the abrasive material supplied from the second flow path is supplied with the gas. Then, the force to pull in the abradable material works, and it is possible to obtain a mixer in which the abradable material in a wet state containing the cleaning particles made of synthetic resin and the liquid can be used, and from the fluid after the cleaning of the pipe to be cleaned is completed. It is also possible to separate and collect solid particles and repeatedly use them as washed granules.

That is, the abradable material of the present invention supplies the cleaning particles in the abradable material to the second flow path by the self-weight of the cleaning particles, mechanical driving, etc. unless they are in a wet state, and the first flow path and the second flow path. It is also possible to draw in by negative pressure at the confluence point with, but in the case where cleaning particles made of synthetic resin and liquid are contained as the abrasive material, it is necessary to mechanically drive the particles to the second flow path. And As a mechanically driven pressure feeding method, any conveyance machine capable of pressure feeding the wet abrasive material may be used. As a preferred embodiment, a positive displacement pump capable of pressure-feeding in a wet state can be used, but in addition, a mohno pump, a gear pump, a conveying device with spiral rotary blades, and the like can be used.

Regarding the first flow path, if the drawing force of the second nozzle for discharging the pressurized water from the third flow path as the working fluid is strong, the gas of atmospheric pressure may be supplied, but it is preferable. By supplying the pressurized gas from the compressor, the drawing force of the abrasive material at the first nozzle is increased.

In a preferred embodiment of the mixer of the present invention, a third channel is provided on the central axis, and a second channel having an annular channel cross-sectional shape is provided coaxially on the outer periphery of the third channel. And a triple coaxial flow channel configuration in which a first flow channel having an annular flow channel cross-sectional shape is provided coaxially on the outer periphery of the second flow channel, and the first nozzle has an inner peripheral side outlet of the second flow channel and an outer peripheral side. Of the first flow path of the second nozzle is formed into an annular discharge port, and the second nozzle is concentric with the outlet of the third flow path on the central axis and the circular discharge port of the first nozzle on the outer periphery thereof. Forming a nozzle. This makes it possible to smoothly feed the abrasive material and form the mixed fluid.

That is, the cross-sectional shape of the second flow path to which the abrasive material of the present invention is supplied is formed by forming an annular flow path coaxially with the outer circumference of the third flow path. As a result, the supply of the abrasive material can be performed in a state with as little resistance as possible, and can be performed in a state where the air flow inside the mixer is not obstructed as much as possible. That is, in pumping an abrasive material containing cleaning particles made of a synthetic resin and a liquid, the greatest concern is the clogging of the abrasive material. Therefore, the structure that obstructs the supply of the abrasive material is eliminated as much as possible. In addition, it is a good idea to eliminate as much as possible the structure that obstructs the drawing of the abrasive material due to the negative pressure at the confluence of the first flow path and the second flow path.

Specifically, the first nozzle forms an annular discharge port with the outlet of the second flow passage on the inner peripheral side and the outlet of the first flow passage on the outer peripheral side as inlets, and the second nozzle is on the central axis. By forming the concentric nozzle having the outlet of the third flow path and the annular discharge port of the first nozzle on the outer periphery thereof as the inlet, the structure for inhibiting the supply of the abrasive material is minimized, and Second
The structure that obstructs the drawing of the abrasive material due to the negative pressure at the confluence point with the flow path is also a structure that is as low as possible.

[0021] As a preferred mode, in the one further provided with a rectifying means for giving a swirl flow to the flow of the gas flowing from the first flow path to the first nozzle, the discharge port is jetted as a swirl flow. It becomes a structure. Due to the generation of this swirling flow, the negative pressure at the confluence point of the first flow path and the second flow path becomes large, so that smooth cleaning particles are supplied and the fluid resistance is generated at the liquid mixing point. It can be reduced and the effect of cleaning the inner wall surface of the pipe to be cleaned by the swirling flow can be increased.

The rectifying means is formed by spiral fins or grooves. Since the formation position may be at least formed in the first flow path, it may be formed on the mixer side wall surface or the second flow path side wall surface. Also, preferably the first of the mixer
Since the flow passage is provided coaxially in the outer periphery of the second flow passage in the annular flow passage cross-sectional shape, it is necessary to install the fins or grooves at symmetrical positions with respect to the axis in order to generate the swirling flow. Two
The swirling flow is weakly generated with one sheet, and turbulent flow may be generated with six or more sheets. Therefore, it is considered that attachment of 3 to 5 fins or grooves is good.

The cleaning particles contained in the abradable material of the present invention may have a specific gravity of less than 1 or a specific gravity of more than 1 as long as they form a mixed flow of gas and pressurized fluid. . However, when the flow velocity of the mixed flow is the same, the washing particles having a large specific gravity are more advantageous because the impact force is increased and the washing efficiency is improved. Therefore, it is preferable to use a material having a specific gravity of the cleaning particles of 1 or more and 1.5 or less, for example, about 1.06 to 1.42. This is because the cleaning particles having a specific gravity smaller than 1 may have a poor impact force on the inner wall of the pipe to be cleaned, and the cleaning particles having a specific gravity larger than 1.5 may cause a problem in pumping in the equipment.

The shape of the cleaning particles can be any shape as long as it forms a mixed flow of gas and pressurized fluid. In a preferred embodiment, the size is such that it can be easily introduced into the pipe to be cleaned together with the mixed flow, and can be easily separated by a separating device thereafter.
Any particle size (average particle size) may be used. It should be noted that pellets 2 to 5 as raw materials for plastic products are inexpensive because of their advantages.
The mm particle diameter (average particle diameter) can be used as it is.

Further, when the cleaning particles are supplied, for example, the discharge pressure of the pump for sending pressure to the second flow path is 0.75MP.
In addition, a circuit for constantly injecting water may be provided at a portion where the cleaning particles are introduced into the pump to ensure continuous smooth pressure-feeding of the cleaning particles.

The present invention as an in-pipe cleaning facility includes the above-mentioned in-pipe cleaning fluid mixer, means for introducing the gas-liquid mixed fluid discharged from the discharge port of the mixer into the pipe to be cleaned, and the inside of the pipe to be cleaned. Since the separation means is provided for separating the solid particles in the abrasive material from the discharged fluid after cleaning, the solid particles separated by the separation means are used again as an abrasive material and as a mixed fluid by the second flow path. It is possible to discharge, and it is possible to significantly reduce the number of cleaning particles used as the pipe cleaning equipment compared to the conventional pipe cleaning equipment.

As the separating means of the present invention, any separating means can be used as long as it is capable of separating the solid particles in the abrasive material from the fluid introduced into the pipe to be cleaned and discharged from the pipe to be cleaned. For example, dust that floats in the water from the wastewater that has passed through the pipe to be washed and sand that settles in the water.
The solid particles in the abradable material are removed from the sludge by a sieve, mesh,
It may be separated by a slit or the like.

[0028] In a preferred embodiment, a cyclone cleaning device is further provided on the upstream side of the separating means to self-clean the solid particles in the abrasive material by giving a swirling flow to the fluid after cleaning discharged from the pipe to be cleaned. Prepare This cyclone cleaning device sends the fluid discharged from the inside of the pipe to be cleaned to the inner wall of the cylinder in a tangential direction, swirling the fluid in a spiral shape to remove dirt such as sludge attached to solid particles in the abrasive material, It has the effect of facilitating the washing of the separated solid particles.

As a preferred embodiment of the present invention, a washing means for washing the solid particles during or after the separation by the separating means with water is further provided. For example, the fluid discharged from the inside of the pipe to be cleaned is introduced into the cyclone cleaning device, and further, the fluid that has passed through this cyclone cleaning device is introduced onto the slanted mesh plate, and the solid particles in the abrasive material roll on the mesh plate. While flowing down, dust and the like smaller than the mesh pass through the mesh. When the solid particles flow down on the mesh plate,
Clean water is sprayed from above the mesh plate with a shower. As a result, the solid particles can be effectively washed, and the solid particles can smoothly flow down.

In the present invention, there is provided a recirculation means for circulating the solid particles separated by the separation means as a component of the abrasive material into the pipe cleaning fluid mixer. As the recirculation means, any means may be used as long as it introduces the above-mentioned mixer into the second flow path. For example, a conduction path or the like that is guided to the upstream side of the above-described positive displacement pump as a preferable mode by its own weight or mechanical drive is raised.

[0031]

EXAMPLES Example 1. Configuration of In-Pipe Cleaning Equipment and Mixer FIG. 1 is an explanatory view showing the configuration of an embodiment of the in-pipe cleaning equipment of the present invention. As shown in FIG. 1, the pipe cleaning equipment of the present invention comprises a pipe cleaning fluid mixer 1 for generating a mixed fluid of liquid, gas and cleaning particles made of synthetic resin, and a feed pipe for guiding the mixed fluid to a pipe 8 to be cleaned. 5, a return pipe 6 for the fluid discharged from the pipe to be cleaned 8, a separation device 7 for separating solid particles from the fluid discharged from the pipe to be cleaned 8, and a compression for supplying compressed air used in the mixer 1. Air supply means 2 and cleaning particle supply means 3 for supplying cleaning particles used in the mixer 1;
It comprises a pressurized water supply means 4 for supplying pressurized water used in the mixer 1 and a drainage means 9 for storing dirty water in the mixed fluid returned from the pipe to be cleaned 8.

FIG. 2 is an explanatory view showing the structure of the mixer used in the pipe cleaning equipment shown in FIG. The mixer 1 has a triple concentric arrangement of a compressed air supply conduit 12 as a first flow path, a cleaning particle supply conduit 13 as a second flow path, and a pressurized water supply conduit 14 as a third flow path in a substantially concentric pattern from the outer peripheral direction. A coaxial flow path is formed, and a compressed air supply line 12 and a cleaning particle supply line 13 are provided.
The first nozzle 17 for drawing in the cleaning particles from the cleaning particle supply pipe line 13 is formed at the tip end portion of and using compressed air as the working fluid, and the pressurized water is used as the working fluid at the tip end part of the pressurized water supply pipe line 14 from the first nozzle. It is connected to the second nozzle 20 and the discharge port 16 while drawing in the air-mixed cleaning particles to generate a mixed fluid.

Compressor 2 as compressed air supply means 2
The compressed air supply line 12 communicating with the compressor 2 is connected to the compressor 2
Compressed air from 2 is supplied, and is concentrically supplied between the outermost wall inside the mixer 1 and the partition wall of the cleaning particle supply conduit 13, and the discharge port 1 is reduced in diameter at the first nozzle 17 portion at the tip.
Introduced in 6. A fixed blade 15 is arranged on the outermost wall portion where the diameter reduction starts, and a spiral flow flowing into the discharge port 16 is generated.

Cleaning particles are supplied to the inside of the compressed air supply line 12 from a cleaning particle supply hopper 28 as the cleaning particle supply means 3 via a hose pump 27 which is a positive displacement pump. In this hose pump 27, an elliptical rotor squeezes a flexible hose 29 to push out cleaning particles therein to the mixer 1. A water injection circuit 21 for constantly injecting water into the portion of the hopper 28 where the cleaning particles are introduced into the pump 27.
In order to achieve continuous and smooth transfer and supply of cleaning particles.

Further, the spiral flow by the fixed blades 15 becomes a negative pressure at the supply port portion where the cleaning particles are supplied to the first nozzle 17, and a force for drawing the cleaning particles into the first nozzle 17 of the mixer 1 works. As a result, even the wet cleaning particles can be smoothly introduced into the mixer 1 to generate a mixed fluid.

A reservoir tank 26 and a pressure pump 25 are arranged as the pressurized fluid supply means 4. Pressurized water as a pressurized fluid, which is pressurized by the pressurizing pump 25, is introduced into the pressurized water supply pipe line 14 arranged on the central axis of the mixer. The tip end portion of the pressurized water supply pipeline 14 is arranged so as to coincide with the axis of the discharge port 16, and the compressed air from the compressed air supply pipeline 12 is swirled by the fixed blades 15 from the first nozzle 17 to the pressurized water supply pipeline. When moving toward 14, the negative pressure generated by the flow of compressed air draws the cleaning particles from the cleaning particle supply line 13 into the inside of the first nozzle 17, and the second nozzle 2
At 0, it is mixed with the pressurized water from the pressurized water supply pipe line 14 to form a mixed fluid, which is discharged from the discharge port 16.

Pressurized water supply line 14 and cleaning particle supply line 1
3, the tip end portion of the pressurized water supply pipe line 14 is provided with an injection port 18 in which the diameter of the intermediate portion is expanded in a droplet shape, and the cleaning particle supply pipe line 13 is provided with one enlarged diameter part of the injection port 18. Is provided with a nozzle body 19 that forms a cone-shaped outlet. By disposing the injection port 18 and the nozzle body 19 in communication with the pressurized water supply pipe 14 and the cleaning particle supply pipe 13, respectively, the structure for inhibiting the supply of cleaning particles is minimized and the interior of the mixer is minimized. The structure that hinders the attraction of the cleaning particles due to the negative pressure is also as low as possible.

The mixed fluid produced in the mixer 1 shown in FIG. 2 is introduced into the pipe 8 to be cleaned through the feed pipe 5 as shown in FIG. The mixed fluid that has cleaned the inside of the pipe to be cleaned 8 is returned to the return pipe 6 of the main pipe cleaning facility. In addition, the introduction switch 1
By setting 0, the flow direction of the mixed fluid can be reversed to the flow direction of the return, whereby the adhering matter separated from the inner wall surface of the pipe to be cleaned or the cleaning particles can be more reliably discharged to the outside.

The mixed fluid wastewater that has passed through the inside of the pipe to be cleaned 8 and returned to the return pipe 6 has foreign substances such as dust inside the pipe to be cleaned 8 and dirt such as sludge clouded in the drainage of the fluid and adhered to the surface of the cleaning particles. There is. Therefore, it is necessary to remove foreign matters and dirt when the cleaning particles are separated by the separating device 7.

FIG. 3 is an explanatory view showing the structure of a separation device used in the pipe cleaning equipment shown in FIG. As shown in FIG. 3, the separation device 7 is roughly divided into a cyclone washing tower 31.
And an inclined separation plate 32. Cyclone washing tower 31
Is equipped with a column container 33 having a cylindrical inner wall having a reduced diameter at the top of the column and having a degassing pipe 34, and an introduction pipe 35 attached tangentially to the inner wall of the cylinder.

The cyclone washing tower 31 has a cylindrical inner wall, and the mixed fluid wastewater is sent tangentially to this inner wall, and the washing particles in the mixed fluid wastewater are swirled vigorously in a swirling manner to perform self-cleaning, that is, washing. Sludge such as sludge adhering to the particles is removed from the washed particles. The air in the mixed fluid drainage is discharged from the degassing pipe 34 during the swirling, and the cleaning particles from which the dirt has fallen and the drainage are discharged from below the tower container 33 to the upstream part of the inclined separation plate 32.

The inclined separating plate 32 is provided with a large number of holes of a size that does not allow cleaning particles to pass through, and the upper and lower portions are covered by the similarly inclined outer jacket member 36. The inclined separation plate 32 rolls or slides the cleaning particles in the drainage of the mixed fluid discharged to the upstream portion, allows the drainage to pass through the inclined separation plate 32, and stores it in the receiving tank 37 along the inclination of the lower mantle member 36a. . The sewage passes through the sewage pipe 40, and after the suspended matter is settled in the sewage collection tank 41 serving as the drainage means 9, the wastewater is subsequently treated and discharged.

The washing particles that roll or slide down along the inclination of the inclined separating plate 32 are washed by the washing shower 30 arranged in the upper mantle member 36b. A foreign matter separating plate 38 having a large number of holes through which washing particles pass is arranged downstream of the inclined separating plate 32, and foreign matters larger than the washing particles such as dead leaves are separated from the washing particles. Foreign substance separation plate 3
The cleaning particles having passed through 8 are the cleaning particle supply hopper 2 at the bottom.
It is conveyed to the hose pump 27 together with the water supplied from the water injection circuit 21.

The foreign matter such as dead leaves separated by the foreign matter separating plate 38 is regularly removed from the foreign matter separating plate 38 of the upper mantle member 36b.
The foreign matter is taken out from the foreign matter takeout port 39 provided in the vicinity. Further, in the present embodiment, an example in which the lowermost part of the mantle member 36 is used as the cleaning particle supply hopper 28 is shown, but another cleaning particle supply hopper 28 'for temporarily storing cleaning particles is provided in the path to the hose pump 27. The cleaning particles may be temporarily stored in the hopper 28 ′ from the lowermost portion of the mantle member 36.

There is a recovery path 11 for branching the path from the cleaning particle supply hopper 28 to the hose pump 27 to recover the cleaning particles after cleaning the pipe to be cleaned. When using the recovery path 11, the operation of the hose pump 27 is stopped, the valve 46 is opened, and the mixed flow of only the compressed air in the first flow path and the pressurized liquid in the third flow path is transferred to the circuit to be cleaned. The cleaning particles flow into the recovery tank 44 by pressure feeding. In the middle of this operation, if the short-time operation of the hose pump 27 is added,
All the washing particles including the washing particles inside the hose pump can be collected in the collecting tank 44.

FIG. 4 is an explanatory view showing the structure of the recovery path used in the pipe cleaning equipment shown in FIG. 1 and 4
As shown in FIG. 5, the recovery path 45 to the cleaning particle recovery tank 44 is closed while closing the valve 43 on the way to the hose pump 27.
By opening the valve 46 on the way, the cleaning particles are introduced into the hemp bag 47 provided in the cleaning particle recovery tank 44.

The fluid from which the cleaning particles have been separated in the cleaning particle recovery tank 44 is conveyed to the waste water collecting tank 41 by a pump, and after the suspended matter is settled, the waste water is treated and discharged.

Example 2. Cleaning Particles The cleaning particles used in the present invention are those that float in water having a specific gravity of less than 1 or settle in water having a specific gravity of more than 1 so long as they form a mixed flow of compressed air and pressurized fluid in the pipe to be cleaned. Any of the above can be used. Among them, when the flow velocity of the mixed flow is the same, the washing particles having a large specific gravity have a larger impact force and are advantageous in improving the washing efficiency.

Therefore, with respect to the cleaning particles, the physical properties of various plastics were investigated, and among them, the three kinds of cleaning particles shown in Table 1 below were cleaned using the pipe cleaning equipment shown in FIGS. A performance test was conducted. As shown in Table 1,
Cleaning particles 1 are inexpensive and have high impact strength, cleaning particles 2
Is cheap and has a specific gravity close to 1.0 and a relatively large impact strength, and the cleaning particles 3 are inexpensive and have a specific gravity of about 1.4 and a relatively large impact strength.

[0050]

[Table 1]

The cleaning performance test was conducted by using a waste cooler (amount of water: 450 liter / min, water inlet temperature: 2) as a pipe to be cleaned.
5 ° C, water pressure loss; 1 mAq, water pressure test pressure; 15 kg / c
m ² G, heat transfer area 189 m ² ) were used. The compressor used in the pipe cleaning equipment had an output of 105 PS, a discharge pressure of 0.69 MPa, and a discharge amount of 11 m ³ / min.

FIG. 5 is a diagram showing the relationship between the outlet pressure and the air volume of the mixer shown in FIG. As shown in the figure, it was confirmed that, in the state where there was no pressurized water amount, at a mixer outlet pressure of 0.08 MPa, an air amount of about 9 m ³ / min was discharged. FIG. 6 is a diagram showing the relationship between the pressurized water amount of the mixer shown in FIG. 2, the air flow rate, and the mixer outlet pressure. As shown in the figure, the amount of pressurized water is 20 l / mi
n, the mixer outlet pressure is 0.17 MPa, the air volume is about 7
It was confirmed to have a performance of discharging m ³ / min.

FIG. 7 is a diagram showing the relationship between the mixer outlet pressure and the air volume when the amount of pressurized water to the mixer shown in FIG. 2 is 10 liters / min and 20 liters / min. As shown in the figure, when the amount of pressurized water increases, the air volume decreases at the same mixer outlet pressure, but the rate of decrease was found to be almost constant depending on the amount of pressurized water.

FIG. 8 is a diagram showing the relationship between the amount of pressurized water and the air volume of the cleaning particles 1 (PC resin), and FIG. 9 is the cleaning particles 2 (A resin).
It is a diagram showing the relationship between the amount of pressurized water (BS resin) -air volume,
FIG. 10 is a diagram showing a relationship between the amount of pressurized water of the cleaning particles 3 (POM resin) and the amount of air. The conditions of the relationship between the amount of pressurized water and the amount of air flow using the three types of cleaning particles are the same (the amount of cleaning particles used is 0.9 kg, the amount of water injected into the hose pump 27 is 4.6 liters / min, and the amount of cleaning shower is 3). .3 liters / mi
n).

As shown in FIGS. 8 to 10, it was observed that when the amount of pressurized water was increased except for the amount of pressurized water of the cleaning particles 2, which was 15 liters / min, the air volume tended to decrease. In addition, no difference was observed in the mixer outlet pressure-air volume characteristics of the apparatus in these three types of use states.

Example 3. Cleaning test for model pipe (1) Test outline a. Simulated Cement Pipe Cleaning Test Both pipes were tested at the same time by connecting the product 10 days after the cement application to the outflow side of the device and the product 5 days old to the return port side. 15
A total of 30 minutes including normal cleaning for 15 minutes and reverse cleaning for 15 minutes was performed. Pressurized water is passed at 20 liters / min, and the air volume at this time is maximized.
Used and circulated.

B. The first time of the silica simulated tube, a cleaning test was performed with cleaning particles 3 (POM) for 33 minutes. The second time, for one simulated tube, 1 cleaning particle
(PC) and washed particles 3 (POM) were used at 0.9 kg each and washed for 30 minutes for comparison.

(2) Test results a. Table 2 below shows a comparison of the reduced weight of each of the cleaning particles applied to the cement simulated pipe.

[0059]

[Table 2]

B. Silica simulated tube cleaning All the cleaning particles peeled off slightly, but the silica substance could not be completely removed. The comparison of the peeling amount of the substance on the inner surface of the pipe is as follows.・ In this machine, the cleaning particle 1 (PC) length direction is + 35mm compared to the maximum 20mm before the test.
An increase of 55 mm was peeled off over the entire surface.・ In the length direction of cleaning particles 3 (POM) used with this device, +3 is added to 55 mm after cleaning with a PC.
A 58 mm increase in mm was peeled off over the entire surface.

C. Performance comparison and cleaning performance by cleaning particles In cement cement pipe cleaning, it was difficult to judge superiority or inferiority by type. Cleaning particles for silica simulated tube cleaning 3
The amount of peeling of the cleaning particles 1 (PC) was larger than that of (POM).

Circulation of cleaning particles in the apparatus The cleaning particles 2 (ABS) tend to float on water in the hopper, the suction to the hose pump is poor, and the particles are likely to stay in the corners of the hopper, and the inclined separation plate 32 is used. The runoff was not so smooth. Also, cleaning particles 1 (PC)
The washed particles 3 (POM) were smoothly circulated.

Residual amount on the equipment to be cleaned 1800 g of each cleaning particle was circulated to the equipment to be cleaned (waste cooler) in Example 2 for the same period of time, and the residual amount after 10 minutes of washing out was compared. The results are shown in Table 3 below.
As shown in Table 3, the cleaning particles 3 (POM) had the highest ratio of 22%. As a comprehensive evaluation, the cleaning particles 1 (PC) were considered to be superior in this device.

As the cleaning particles used in this apparatus, it is considered advantageous to use an apparatus capable of utilizing particles having a large specific gravity.
This is because cleaning with a mixed flow is performed by the cleaning particles colliding with the inner wall surface of the pipe, and the cleaning efficiency is represented by the friction coefficient between the cleaning particle and the inner wall surface of the pipe, which is the unit volume of the particle. It is considered to be proportional to the mass per hit and to the square of the velocity of the particle.

[0065]

[Table 3]

Since there is no kinetic formula for cleaning particles in a high-speed air flow, a trial weighting is carried out with reference to the sand cleaning formula. In the 16φ pipe, the flow speed of the cleaning particles mixed and flowing at an air velocity of 22.1 m / s is The flow velocity of particles having a specific gravity of 1.02 is 20.8 m / s, the flow velocity of particles having a specific gravity of 1.20 is 20.7 m / s, the flow velocity of particles having a specific gravity of 1.40 is 20.6 m / s, and there is a large difference in specific gravity. Therefore, if the flow velocities are substantially the same, it is advantageous in terms of cleaning efficiency to use particles having a large mass and cleaning particles having a large specific gravity.

As described above, in the main pipe cleaning facility, cleaning particles are separated from sludge and the like from the waste water after cleaning and recovered, and the cleaning particles are circulated again for cleaning. Can be done. The amount of cleaning particles used is, for example, about 10 when cleaning 6 generator coolers.
kg is sufficient, which is about one-fifteenth as much as with conventional dried wash granules.

In order to recover the washing particles, the drainage of the mixed fluid is partially reduced in the cyclone washing tower, and then sludge, dead leaves and the like and washing particles are removed by the inclined slanted separating plate and foreign matter separating plate. It is designed to be separated. A washing shower is provided on the upper mantle member to smoothly flow the washing particles,
It is supposed that the washing particles that flow down are washed with water, or sludge and the like are dropped immediately. Since the cleaning particles are repeatedly used for cleaning by the automatic circulation, the involvement of human power is unnecessary, and at least one operator is required to manage the main cleaning equipment. Further, the final collection of the washed particles can be easily collected in a hemp bag by opening the valve of the branch circuit.

[0069]

INDUSTRIAL APPLICABILITY As described above, the present invention can provide a mixer or an in-pipe cleaning facility that can use wet cleaning particles. Further, there is an effect that the function of the mixer can be enhanced to obtain the mixer capable of improving the cleaning ability and shortening the cleaning time, or the in-pipe cleaning equipment.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of a pipe cleaning facility of the present invention.

FIG. 2 is an explanatory diagram showing a configuration of a mixer used in the pipe cleaning facility shown in FIG.

3 is an explanatory diagram showing a configuration of a separation device used in the pipe cleaning facility shown in FIG. 1. FIG.

FIG. 4 is an explanatory diagram showing a configuration of a recovery path used in the pipe cleaning facility shown in FIG.

5 is a diagram showing the relationship between the outlet pressure of the mixer shown in FIG. 2 and the air volume.

FIG. 6 is a diagram showing the relationship between the amount of pressurized water of the mixer shown in FIG. 2, the amount of air, and the mixer outlet pressure.

7 is a diagram showing the relationship between the mixer outlet pressure and the air flow rate when the amount of pressurized water to the mixer shown in FIG. 2 is 10 liters / min and 20 liters / min.

FIG. 8 is a diagram showing a relationship between the amount of pressurized water and the amount of air of cleaning particles 1 (PC resin).

FIG. 9 is a diagram showing a relationship between the amount of pressurized water and the amount of air of cleaning particles 2 (ABS resin).

FIG. 10 is a diagram showing a relationship between the amount of pressurized water and the amount of air flow of cleaning particles 3 (POM resin).

[Explanation of symbols]

1 ... pipe cleaning fluid mixer, 2 ... compressed air supply means, 3 ... means for supplying cleaning particles, 4 ... Pressurized water supply means, 5… Feed pipe, 6 ... Return piping, 7 ... Separation device, 8 ... Pipe to be cleaned, 9 ... Drainage means, 10 ... Introduction switch, 11 ... Collection route, 12 ... Compressed air supply line, 13 ... Cleaning particle supply line, 14 ... Pressurized water supply line, 15 ... fixed blade, 16 ... Discharge port, 17 ... the first nozzle, 18 ... injection port, 19 ... Nozzle body, 20 ... the second nozzle, 21 ... Water injection circuit, 22 ... Compressor, 25 ... Pressurizing pump, 26 ... Reservoir, 27 ... hose pump, 28 ... Cleaning particle supply hopper, 29 ... hose 30 ... wash shower, 31 ... cyclone washing tower, 32 ... Inclined separation plate, 33 ... tower container, 34 ... Degassing piping, 35… Introduction piping, 36 ... Mantle member, 36a ... Lower mantle member, 36b ... Upper mantle member, 37 ... receiving tank, 38 ... foreign matter separating plate, 39 ... foreign matter outlet, 40… Sewage piping, 41 ... sewage collection tank, 42 ... a transport path, 43 ... valve, 44 ... Washing particle recovery tank, 45 ... Collection path, 46 ... valve, 47 ... hemp bag

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B08B 5/02 B08B 5/02 A 9/02 C23G 3/04 C23G 3/04 F28G 9/00 Z F28G 9 / 00 B08B 9/02 E (72) Inventor Seio Oura 1-2-13, Higashida-cho, Toyama-city, Toyama Prefecture Inside Kanden Wellbe Co., Ltd. (72) Nobuhide Yamashita 1-2-chome, Higashida-cho, Toyama-shi, Toyama No. 13 Kanden Welby Co., Ltd. (72) Inventor Masayuki Taniguchi 1-22-1 Higashida-rimachi, Toyama City, Toyama Prefecture Kanden Wellbe Co., Ltd. (72) Takashi Kusue 100 Yokamachi, Toyama City, Toyama Prefecture Stock In-house F-term (reference) 3B116 AA13 AB53 BA06 BB22 BB38 BB88 BB90 CD22 3B201 AA13 AB53 BA06 BB22 BB38 BB88 BB90 BB92 CD22 4F033 QA09 QB02Y QB03X QB05 QB1 2Y QB15X QB18 QC02 QD02 QD10 QD14 QD19 QE09 QE21 QE28 QF08X QF15X QF28 4G035 AB16 AB34 AB52 AC47 AE13 4K053 PA18 QA04 QA07 RA07 SA05 SA12 SA19 TA18 XA24 XA50

Claims (8)

[Claims] 1. A pipe cleaning fluid mixer for discharging a gas-liquid mixed fluid containing an abrasive material to be pressure-fed into a pipe to be cleaned in order to remove deposits on an inner wall surface of the pipe to be cleaned, which comprises: A first flow path that receives the supply of the abrasive material, a second flow path that receives the supply of the abrasive material, a third flow path that receives the supply of the pressurized liquid, and a second flow path that uses the gas from the first flow path as a working fluid. First nozzle for discharging the gas-mixed abrasive material by drawing in the gas-abrasive material, and the gas-liquid mixed fluid by drawing in the gas-mixed abrasive material from the first nozzle using the pressurized liquid from the third flow path as the working fluid. And a second nozzle that discharges to the discharge port as a pipe cleaning fluid mixer. 2. The pipe according to claim 1, wherein the abrasive material contains cleaning particles made of a synthetic resin and a liquid, and further provided with a positive displacement pump for pumping the abrasive material to the second flow path. Wash fluid mixer. 3. A third flow path is provided on the central axis line,
Triple coaxial flow path in which a second flow path having an annular flow path cross-sectional shape is provided coaxially on the outer circumference of the flow path, and a first flow path having an annular flow path cross-sectional shape is provided coaxially on the outer circumference of the second flow path The first nozzle forms an annular discharge port with the outlet of the second flow passage on the inner peripheral side and the outlet of the first flow passage on the outer peripheral side as inlets, and the second nozzle forms the third flow on the central axis. The pipe cleaning fluid mixer according to claim 1 or 2, wherein a concentric nozzle having an inlet of the outlet of the passage and an annular outlet of the first nozzle on the outer periphery of the outlet is formed. 4. The in-pipe cleaning fluid mixer according to claim 3, further comprising rectifying means for imparting a swirl flow to a gas flow flowing from the first flow path to the first nozzle. 5. A pipe cleaning fluid mixer according to any one of claims 1 to 4, and means for introducing the gas-liquid mixed fluid discharged from a discharge port of the mixer into a pipe to be cleaned. An in-pipe cleaning facility comprising: a separation means for separating solid particles in the abrasive material from a fluid after cleaning discharged from the inside of the pipe to be cleaned. 6. A cyclone cleaning device is further provided on the upstream side of the separating means to give a swirling flow to the fluid after cleaning discharged from the pipe to be cleaned to self-clean the solid particles in the abrasive material. The pipe cleaning equipment according to claim 5. 7. The pipe cleaning equipment according to claim 5 or 6, further comprising a cleaning means for washing the solid particles during or after the separation by the separating means with water. 8. A recirculation means for circulating the solid particles separated by the separation means to the in-pipe cleaning fluid mixer as a component of the abrasive material.
In-pipe cleaning equipment according to any one of 1.