JP2013036785A - Device for sampling bubbles in spent and discharged seawater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for sampling bubbles in spent and discharged seawater capable of easily collecting bubbles accompanying seawater discharged to a discharge channel to prepare a sample for analysis in a short time.SOLUTION: A device for sampling bubbles in spent and discharged seawater comprises: a bubble sampling tube 14 having a sampling port 13 for sampling bubbles 22 floating on spent and discharged seawater 11 in a discharge channel 12 for the spent and discharged seawater 11; a suction blower 15 that is interposed to the bubble sampling tube 14 and that is suction means for suctioning the bubbles 22; a bubble breaking tower 17 that introduces the bubbles 22 suctioned by the suction blower 15 and that breaks the bubbles while dropping beads 16; a bead collecting basket 19 that is bead collecting means for collecting the dropped beads 16 and liquid 18 derived from bubbles; and a bubble component collecting container 20 for collecting the liquid 18 derived from bubbles separated with the beads 16.

Description

  The present invention is accompanied by spent discharged seawater that is discharged into the sea again after using seawater as cooling water for power plants and chemical plants such as thermal power plants and nuclear power plants, or as cleaning water for exhaust gas. The present invention relates to a bubble collecting device for used discharged seawater for monitoring bubbles.

  In various power plants such as nuclear power plants and thermal power plants, seawater is used in large quantities as cooling water for condensers, water for exhaust gas treatment of seawater desulfurization equipment, and heat exchange water for heat exchangers, etc. Has been. Used seawater discharged after use in condensers, used seawater used in seawater desulfurization facilities, and discharged seawater discharged from heat exchangers, etc. are discharged into the water discharge channels as hot effluents. It is discharged into the river area.

  In general, weirs are installed in the diversion channel to cope with fluctuations in the tide level of the sea. However, a large amount of water is discharged on the surface of the diversion channel by draining the wastewater downstream of this weir and entraining the air. Bubbles are generated. In addition to the bubbles that are generated when the drainage entrains the air, the discharge channel also includes bubbles that are caused by various causes such as chemicals such as surfactants, contaminants such as microorganisms and dead organisms. There is a case.

  Most of the foam generated by entraining air disappears in the middle of the water discharge channel, but the foam generated due to chemicals and contaminants is easily broken by the surface active action of chemicals and contaminants. Therefore, it often floats on the surface of used seawater or discharged seawater, and may be discharged to the sea from the outlet of the discharge channel.

  Conventionally, for example, a foaming suppression method that suppresses the generation of bubbles when seawater is used as cooling water by adding a chemical such as an antifoaming agent in seawater used as cooling water has been used (for example, Patent Document 1). As a result, the generation of bubbles on the water surface of the water discharge channel is suppressed, and the used seawater and the discharged seawater flowing through the water discharge channel are prevented from causing bubbles to flow out into the sea area and river area.

  In addition, bubbles generated due to chemicals, contaminants, etc. have poorer appearance than bubbles generated by entraining air, and there is no regulation of bubbles in the drainage standards, but bubbles generated due to these are accompanied by bubbles. The discharged seawater is likely to be recognized as polluted wastewater in appearance. Therefore, from the viewpoint of ensuring the safety of fisheries and agriculture in the surrounding sea area and river area where the drainage is discharged, confirmation and certification of foam safety may be performed.

International Publication No. 2008/041400

  Here, when confirming and verifying the safety of foam, in order to collect the foam floating in the used seawater and discharged seawater from the discharge channel and perform analysis, etc., the foam must be in a liquid state. It is necessary to secure at least several liters. Also, when collecting bubbles floating in the used seawater or discharged seawater from the discharge channel, collect the bubbles in a bag or container using a bucket etc. in the discharge channel and crush the collected bubbles by hand. It was necessary to make it liquid before collecting it in a container for analysis.

  However, since bubbles contain many bubbles, when trying to secure several liters as a sample for analysis with the bubbles in a liquid state, it is only necessary to collect the bubbles and secure a sample for analysis. There is a problem that it took at least one day.

  In this way, since the bubbles floating in the used seawater and the discharged seawater from the discharge channel are collected and analyzed, the work on the surface of the discharge channel is often labor intensive and labor intensive. There is a strong demand for a bubble detection device that can easily collect bubbles suspended above and use them as a sample for analysis in a short time.

  The present invention has been made in view of the above problems, and can be used to easily collect bubbles accompanied by discharged seawater discharged to a discharge channel and use it as a sample for analysis in a short time. It is an object to provide a seawater bubble collecting apparatus.

  The first invention of the present invention for solving the above-mentioned problems is a foam collection tube having a collection port for collecting bubbles floating in the discharged seawater of the used discharged seawater, and the foam collection. A suction means for sucking bubbles, which is interposed in a tube, introduces the bubbles sucked by the suction means, and a bubble breaking tower for breaking the bubbles while dropping the beads, and is derived from the foam together with the dropped beads A used waste seawater foam collection device comprising: a bead collection means for collecting a liquid; and a foam component collection container for collecting a liquid derived from a foam from which the beads have been separated.

  According to a second aspect of the present invention, in the first aspect of the invention, there is provided a bubble collecting apparatus for used discharged seawater, characterized by having a heating means for heating the beads to be dropped.

  A third aspect of the present invention is a foam collection pipe having a collection port for collecting bubbles floating in the discharged seawater in a discharge channel of used discharged seawater, and a suction that is interposed in the foam collection pipe and sucks bubbles. And a foam component recovery system that introduces bubbles sucked by the suction means and that collects foam-derived liquid while allowing the beads to slide and breaking the bubbles by sliding the beads. And a container for collecting bubbles of used discharged seawater.

  According to the used exhausted seawater foam collecting apparatus of the present invention, it is possible to easily collect the foam accompanying the discharged seawater discharged to the water discharge channel and use it as a sample for analysis in a short time.

FIG. 1 is a schematic diagram of a configuration of a used wastewater seawater foam collecting apparatus according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a view as seen from the BB direction of FIG. FIG. 4 is a schematic view of a used waste seawater foam collecting apparatus according to Embodiment 2 of the present invention.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS A used exhausted seawater foam collecting apparatus according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of the configuration of a used waste seawater foam collecting apparatus according to the present embodiment. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a view seen from the direction BB in FIG. As shown in FIGS. 1 to 3, the used exhausted seawater foam collecting device 10 </ b> A according to the present embodiment collects the bubbles 22 floating in the discharged seawater 11 of the discharge channel 12 of the used exhausted seawater 11. While introducing the foam collection tube 14 having the collection port 13, the suction blower 15 that is interposed in the foam collection tube 14 and sucks the foam 22, and the foam 22 sucked by the suction blower 15, A bubble breaking tower 17 for breaking the bubbles 22 while dropping the beads 16, a bead collecting bowl 19 that is a bead collecting means for collecting the bubble-derived liquid 18 together with the dropped beads 16, and a bubble derived from separating the beads 16 And a foam component recovery container 20 for recovering the liquid 18. In the figure, V indicates a valve.

  The discharged seawater 11 is, for example, hot water drained from the sea 30 as hot water discharged from a condenser such as a thermal power plant, a nuclear power plant, etc. Yes, it is used seawater discharged from the water discharge pipe 31 such as a condenser toward the sea.

  The spillway 12 is provided with a weir 32, and the height of the water surface of the spillway 12 is formed so that, for example, the condenser is higher than the sea area side so as not to be affected by fluctuations in the sea tide level. Yes.

  In the discharge channel 12, a large amount of bubbles 22 are generated in the discharged seawater 11 until the discharged seawater 11 is discharged toward the sea 30, and the discharged seawater 11 accompanied by the bubbles 22 is directed toward the sea 30. Flowing. The bubbles 22 are generated when the discharged seawater 11 flows down downstream of the weir 32, the discharged seawater 11 includes air, chemicals such as surfactants, contaminants such as microorganisms and biological dead bodies, There are bubbles caused by various causes such as algae and bacteria in water, fine particles of inorganic and organic substances, polysaccharides, amphiphilic biopolymers such as fat. Most of the bubbles generated by entraining air disappear in the middle of the water discharge channel 12, but the bubbles generated due to pollutants and the like are water and other substances (chemicals, pollutants, algae in water, Bacteria, inorganic and organic microparticles, polysaccharides, fats and other amphiphilic biopolymers) are aerated and adsorbed around the bubbles by rising under pressure when the submerged bubbles rise. Therefore, it functions as a surfactant, making it difficult for the bubbles to break. Moreover, even when a physical force is applied to these bubbles 23, extra bubbles are often generated without breaking or defoaming. That is, polluted components such as sludge accumulated in the discharged seawater 11 and at the bottom of the discharge channel 12 in the process where small bubbles rise from the lower part of the discharge channel 12 are entrained in the bubbles. It is conceivable to take in a large amount of amphiphilic biopolymers such as bacteria, inorganic or organic fine particles, polysaccharides, fats, etc., and to form bubbles with many smaller bubbles in the bubbles. As a result, the film of the foam 23 is thick and strong, and as a result, the bubbles are difficult to break, making it difficult to break and defoam. Therefore, bubbles generated due to chemicals, contaminants, and the like often float in a colored state on the surface of the discharged seawater 11 up to the discharge port of the water discharge channel 12.

  A floating body (float) 23 that blocks the flow in the vicinity of the surface of the discharged seawater 11 accompanied by the bubbles 22 is provided in the vicinity of the boundary between the water discharge path 12 and the sea area on the downstream side of the water discharge path 12. A plurality of moorings are provided in a direction substantially orthogonal to the direction. In order to block the flow near the surface of the discharged seawater 11 by suspending the float 23 in the discharged seawater 11, it is possible to suppress the floating bubbles 22 from being accompanied by the discharged seawater 11 and diffusing into the sea. Yes. In addition, the floats 23 are connected to each other by, for example, a string or the like, and the number of the floats 23 is adjusted by the width of the water discharge channel 12 or the like. Further, the height of the float 23 and the amount of submergence may be appropriately adjusted according to the generated bubbles 22.

  A foam sampling tube 14 having a sampling port 13 at the tip is a tube that collects the bubbles 22 floating in the discharged seawater 11 of the discharge channel 12 and feeds the bubbles 22 to the outside of the discharge channel 12, and is sucked up by the suction blower 15. It is introduced into the bottom of the bubble breaking tower 17 installed on the outlet side of the suction blower 15.

The bubble breaking tower 17 introduces the bubbles 22 sucked by the suction blower 15 to the bottom thereof and raises the bubble breaking cylinder 17a.
The bubble breaking tower 17 is provided with a bead tank 17b for storing the beads 16 to be dropped and a discharge pipe 17c for discharging the liquid 18 to be discharged.
When the bubble 22 is introduced into the bottom of the bubble breaker tower 17 and when rising inside the bubble breaker cylinder 17a, the contact bubble breaking action and the falling bubble breakage action are promoted by contacting the falling beads 16. .
The beads 16 collected by the bead cage 19 are reused.
Here, in order to prevent dirt in the bubble breaking cylinder 17a, acid may be supplied to make the inside of the cylinder weakly acidic.

  When the beads 16 are dropped, for example, alcohol having a defoaming action may be sprayed into the bubble breaking cylinder. This further promotes bubble breaking.

Further, when the beads 16 are dropped, the beads 16 may be heated by a heater (not shown) to promote bubble breakage.
The heating temperature by this heater is preferably about 80 ° C. because it promotes bubble breakage.

Therefore, the used wastewater seawater foam collecting apparatus 10A according to the present embodiment is provided in the water discharge channel 12, the foam 22 is sucked by the suction blower 15, and the foam breaking tower 17 breaks the foam while dropping the beads 16. The liquid 18 of the foam component can be efficiently recovered.
For this reason, the bubbles 22 can be easily liquefied in a short time and recovered for analysis.

Here, the beads 16 have a diameter of about 1 to 20 mm to facilitate recovery. Moreover, since the bubble 22 is analyzed, it is preferable to use a material that does not elute components from the beads 16. Moreover, what has pores, such as a sintered material, since a bubble component adsorb | sucks, the thing without a pore on the surface is preferable.
For example, the material of the beads 16 can be made of metal (for example, steel) or resin. However, since the liquid after being broken may be returned to the sea, it is a condition that no harmful substances such as harmful heavy metals, VOCs, and environmental hormones are eluted from the beads.

  Here, the remaining bubbles 22 may be broken by vibrating the bead collection basket 19 by a vibration means (not shown).

The collected bubble component of the liquid is analyzed by a separately known analysis means.
The analysis of the foam is conducted to investigate organic substances or organisms that can cause foaming, for example, when the contents of the foam or constituent substances are grasped, for example, sample appearance observation, microscopic observation, TOC (total organic carbon) analysis, It can be carried out by CHN analysis, SS measurement, differential thermal analysis, heavy metal analysis, photo determination analysis, and the like.

  Further, the collection and liquefaction of the bubbles 22 can be performed by driving only a simple suction blower, and can be performed without consuming much electricity.

  In the present embodiment, the number of times the bubbles 22 floating in the discharged seawater 11 are collected is one time, but is not limited to this, and the float 22 floats in the discharged seawater 11 according to the required amount of collection. The number of times the bubbles 22 are collected may be a plurality of times.

  In the present embodiment, the foam 22 blocked by the float 23 is collected, but the present embodiment is not limited to this, and stays in the weir 32 provided in the water discharge channel 12. The bubbles 22 may be collected.

  In this embodiment, the case where the discharged seawater 11 is monitored and treated for bubbles accompanying the used seawater discharged from a condenser of a power plant such as a thermal power plant or a nuclear power plant has been described. However, this embodiment is not limited to this, and the same applies to used discharged seawater used in seawater desulfurization equipment, wastewater discharged from heat exchangers, wastewater discharged into rivers, etc. Can do.

  The used waste seawater foam collection apparatus according to the present embodiment will be described. The used exhausted seawater foam collecting apparatus according to the present embodiment has the same configuration as that of the used exhausted seawater foam collecting apparatus according to the first embodiment shown in FIGS. For this reason, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

FIG. 4 is a schematic view of a used waste seawater foam collecting apparatus according to Embodiment 2 of the present invention.
In the used exhausted seawater foam collecting apparatus 10A according to the first embodiment, the foam was broken with the beads 16 to be dropped using the bubble breaking tower 17 to drop the beads 16, but the used exhaust according to the present embodiment was used. In the bubble collecting apparatus 10B for seawater, the bubble breaking tower 17 is omitted.
As shown in FIG. 4, the used wastewater seawater foam collecting apparatus 10 </ b> B according to the present embodiment has a sampling port 13 that collects bubbles floating in the discharged seawater in the drainage channel of the used discharged seawater. A tube 14, a suction blower 15 that is interposed in the bubble collecting tube 14 and is a suction means for sucking the bubbles 22, a bead sliding rod 24 on which the beads 16 slide, and a slide on the bead sliding rod 24 And a sliding device 25.

  The beads 16 in the bead sliding rod 24 are slid by sliding with the sliding device 25 so that the bubbles 22 falling on the rod are broken.

10A, 10B Foam collection device for used discharged seawater 11 Discharged seawater 12 Water discharge channel 13 Collection port 14 Foam collection pipe 15 Suction means (suction blower)
16 beads 17 bubble breaking tower 18 liquid (foam component)
20 Foam component recovery container 30 Sea

Claims (3)

A foam sampling tube having a sampling port for collecting bubbles floating in the discharged seawater of the used discharged seawater discharge channel;
A suction means interposed in the foam collecting tube and sucking the foam;
A bubble breaker tower that introduces bubbles sucked by the suction means and breaks bubbles while dropping beads,
Bead collecting means for collecting the liquid derived from the foam together with the dropped beads,
A foam component recovery container for recovering a liquid derived from the foam from which the beads are separated;
A foam collecting device for used discharged seawater, comprising: In claim 1,
A foam collecting device for used discharged seawater, comprising a heating means for heating the beads to be dropped. A foam sampling tube having a sampling port for collecting bubbles floating in the discharged seawater of the used discharged seawater discharge channel;
A suction means interposed in the foam collecting tube and sucking the foam;
While introducing the bubbles sucked by the suction means, beads sliding slidable beads,
A foam collecting device for used discharged seawater, comprising: a foam component recovery container for recovering a liquid derived from foam while causing foam to break by sliding of the beads.

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