JP2019122355A - Acid treatment ship of laver net - Google Patents

Abstract

To provide an acid treatment ship for a laver net capable of efficiently performing sufficient acid treatment with minimum deviation of a set pH value and an actual pH value in an acid treatment tank.SOLUTION: An acid treatment ship A of a laver net comprises at least: an acid treatment tank 15 for storing an acid treatment liquid; an acid stock solution supply device 40 for supplying a stock solution of the acid treatment liquid into the acid treatment tank 15; and a control device 50 for detecting a pH value of the acid treatment liquid in the acid treatment tank 15, actuating the acid stock solution supply device 40 based on the detection value, and controlling a pH value of the acid treatment liquid into a constant pH value. The acid stock solution supply device 40 comprises at least one bottomed tubular member 60 comprising a plurality of discharge holes for jetting an acid stock solution on optional positions on the acid treatment tank 15, the tubular member 60 has an inner diameter of 3-8 mm, the number of the discharge holes is 3-10, and a hole diameter of the discharge hole is 1.0-2.0 mm.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to an acid-treated ship of a seaweed net, which acid-treats fungi such as diatoms and red rot bacteria adhering to a seaweed net during aquaculture with an acid treatment agent (liquid).

  Conventionally, an acid treatment agent having a composition comprising a combination of diatoms, red rot fungus, and other fungi adhering to nori nets spread over the sea surface in nori fish farms and combinations of organic acids such as citric acid and malic acid There are many known types and configurations of acid treatment vessels in seaweed nets that effectively treat acid.

In general, by soaking the seaweed network in an acid-treated solution having a constant pH value, the growth of seaweeds is accelerated and the growth of each seaweed net is kept constant, so that such seaweeds are treated with good quality. An acid treatment vessel of nori nets that can harvest nori seaweed.
In the acid treatment vessel of this nori net, an acid treatment tank of a fixed capacity, a pulling up device of nori net, an acid stock solution replenishment device for replenishing an acid stock solution in the acid treatment tank, and an inside of the acid treatment tank A control unit for detecting the pH value of the acid treatment liquid and operating the replenishing device based on the detected value to maintain the acid treatment liquid at a predetermined pH value, for example, around pH 2.0 (See, for example, Patent Document 1).

In addition, as a small-sized nori-line acid treatment vessel, an acid treatment vessel using a box-type vessel is known. For example, as an acid treatment vessel of this small nori net,
1) An acid treatment tank provided with a nori net winding device for winding up the nori net from the sea, a chemical circulation device for circulating the chemical, and a concentration detection for detecting the concentration of the chemical circulated by the chemical circulation device U.S. Pat. No. 6,075,015, which has an apparatus and
2) An active treatment agent tank containing an active treatment agent for activating treatment of nori nets placed in a nori fish farm, treated water in which the active treatment agent and water are mixed, is contained, and the nori net is contained An apparatus for supplying a seaweed network activation treatment agent, comprising: a treatment vessel in which the activation treatment is carried out; 3) See
3) As a box-type ship capable of maintaining the acid treatment liquid at a desired pH value, an acid treatment tank for storing the acid treatment liquid, and the acid treatment tank provided in the acid treatment tank and wound with a nori net attached to the seaweed It is a box type ship provided with a pair of take-up rolls to take, and it is provided in the above-mentioned acid treatment tank, pH sensor which detects pH of the above-mentioned acid treatment liquid, A stock solution discharge unit for discharging an acid stock solution, and a stock solution supply device for automatically adjusting the supply amount of the acid stock solution to be supplied to the stock solution discharge section based on the detection value of the pH sensor; The stock solution discharge unit is provided between the pair of winding rolls, and is provided with a rod-like member provided above the acid treatment tank so as to face the liquid surface of the acid treatment liquid, and the acid treatment from the rod-like member Sheet member hanging down toward the liquid surface, and the sheet member A box-shaped vessel (e.g., a tubular vessel provided on both sides of the rod-like member) and having a plurality of discharge holes formed at predetermined intervals for discharging the acid stock solution toward the sheet member; , Patent Document 4),
4) An acid treatment tank for storing the acid treatment solution diluted with the acid stock solution, in order to prevent the acid stock solution and the acid treatment solution having a concentration higher than the desired concentration from coming into contact with the network A box type ship provided in the acid treatment tank and provided with a take-up roll for taking up a seaweed network to which the seaweed adheres, comprising: a flexible sheet which is separated from and suspended from the take-up roll; An acid stock solution discharge unit for discharging the acid stock solution on the surface of the acidity sheet, and an acid stock solution supply section for feeding the acid stock solution down the surface of the flexible sheet to the acid treatment tank; When the acid treatment tank is inclined such that the lower end of the flexible sheet approaches the winding roll, the acid stock solution supply unit is more than the lower end of the flexible sheet at the liquid surface of the acid treatment liquid. Supplying the acid stock solution at a position far from the winding roll A box-type ship characterized by (see, for example, Patent Document 5),
Etc. are known.

In the acid treatment vessel of the seaweed net of the patent documents 1-5, the pH value of the acid treatment liquid in the acid treatment tank of a fixed capacity is detected, and the pump etc. of the supply device is operated based on the detected value. The acid treatment liquid (acid stock solution etc.) in the treatment tank is supplied to the acid treatment tank through a supply pipe or a tubular member having a discharge hole, and the acid treatment liquid in the acid treatment tank has a predetermined pH value, usually pH 2 .0 was to be kept around.
However, the feed pipes and tubular members used in the above-mentioned Patent Documents 1 to 5 mainly use water pipes made of vinyl chloride or the like, so the inner diameter is as large as 13 mm or more, and the feed pipes and The hole diameter of the discharge holes formed in the tubular member was the same, and the distance (distance) between the discharge holes was the same. Therefore, a part of the acid stock solution supplied from the supply pump remains in the supply pipe or tubular member and does not drop to the set pH value, and the set pH value and the actual pH value in the acid treatment tank And the problem that sufficient acid treatment can not be performed efficiently.

  Moreover, in the acid treatment vessel of the seaweed mesh of Patent Documents 4 and 5, since it is a method of discharging the acid stock solution toward the sheet member, the acid stock solution for the sheet member having a large surface area in addition to remaining in the tubular member. As some of the deposits adhere and remain, the difference between the set pH value and the actual pH value in the acid treatment tank is even greater, and there is a problem that sufficient acid treatment can not be performed efficiently. ing.

JP-A-5-95740 (claims, FIG. 1, etc.) Utility model registration No. 3212304 (The scope of utility model registration request, FIG. 1, etc.) Utility model registration No. 3210762 (The scope of utility model registration request, Fig. 1 etc.) Patent No. 6161016 (Claims, Figs. 1 and 2, etc.) Patent No. 6218984 (claims, FIGS. 1 to 4 and the like)

  The present invention is intended to solve the above-mentioned conventional problems and the like, and a seaweed which acid-treats fungi such as diatoms and red rot bacteria adhering to a seaweed network during aquaculture with an acid treatment agent (liquid) In the acid treatment vessel of net, sufficient acid treatment is carried out by minimizing the deviation between the set pH value and the actual pH value in the acid treatment tank and preventing the occurrence of uneven concentration in the acid treatment tank. An object of the present invention is to provide an acid treatment vessel for seaweed nets that can be performed efficiently.

  As a result of intensive studies on the above-mentioned conventional problems etc., the present inventors at least, an acid treatment tank containing an acid treatment liquid, and an acid stock solution supply device for supplying a stock solution of the acid treatment liquid into the acid treatment tank, A control unit for detecting the pH value of the acid treatment liquid in the acid treatment tank and operating the acid stock solution supply device based on the detected value to control the acid treatment liquid to a constant pH value The acid stock solution supply device includes at least one bottomed tubular tubular member having a plurality of discharge holes for ejecting the acid stock solution at any position on the acid treatment tank. By setting the inner diameter of the tubular member, the number of discharge holes, the hole diameter of the discharge hole, and the ratio of the hole diameter of the last discharge hole to the hole diameter of the first discharge hole in a specific range, respectively. It was found that an acid treatment vessel could be obtained, and the present invention was completed. .

That is, it exists in following (1)-(6).
(1) At least an acid treatment tank containing an acid treatment liquid, an acid stock solution supply device for supplying a stock solution of the acid treatment liquid into the acid treatment tank, and detecting the pH value of the acid treatment liquid in the acid treatment tank And a control unit for operating the acid stock solution supply device based on the detected value to control the acid treatment solution to a constant pH value, wherein the acid stock solution supply system for the acid stock solution comprises: And at least one or more bottomed cylindrical tubular members having a plurality of discharge holes for discharging an acid stock solution at any position on the acid treatment tank, and the tubular members have an inner diameter of 3 to 8 mm. An acid-treated vessel of a seaweed net, characterized in that the number of discharge holes is 3 to 10 and the hole diameter of the discharge holes is 1.0 to 2.0 mm.
(2) The acid of the seaweed network according to the above (1), wherein the ratio of the hole diameter of the last discharge hole to the hole diameter of the first discharge hole of the tubular member is 1.08 to 1.27. Processing ship.
(3) When the number (a) of the discharge holes of the tubular member is four or more, a distance (X ₁ ) between the first discharge hole and the second discharge hole and one before the last discharge hole The distance between the discharge hole and the last discharge hole is the same (X ₁ = X _a−1 , where a is the number of discharge holes), and the discharge from the _second discharge hole (X ₂ ) to one before the last discharge hole hole above _{(X a-1)} each interval is equal to or the same _{(X 2 = X 3 = ...} ) (1) or (2) seaweed networks acid treatment vessel according.
(4) The acid-treated vessel of a seaweed net is provided with a take-up roll for winding up the seaweed net in the acid treatment tank, described in any one of the above (1) to (3) Acid treatment ship of Nori net.
(5) The acid-treated vessel of the seaweed network includes a support member suspended at a central portion of the acid treatment tank, and a sheet-like member suspended from the support member to the acid treatment liquid of the acid treatment tank. The acid-treated vessel of a seaweed net according to any one of the above (1) to (4), wherein the tubular member is provided on one side or both sides of the sheet-like member.
(6) The acid of the network according to any one of the above (1) to (5), wherein a flexible tube having visibility is attached to each discharge hole of the tubular member. Processing ship.

According to claims 1 and 2 of the present invention, the ratio of the diameter of the last discharge hole to the inner diameter of the tubular member for supplying the acid stock solution, the number of discharge holes, the diameter of the discharge hole and the diameter of the first discharge hole By setting each specific range, the deviation between the set pH value and the actual pH value in the acid treatment tank is minimized, and concentration unevenness in the acid treatment tank does not occur, which is sufficient. There is provided an acid treatment vessel of a seaweed net that can efficiently carry out acid treatment.
According to the invention of claim 3, the acid-treated vessel of the seaweed network which can perform sufficient acid treatment more efficiently by further minimizing the deviation between the set pH value and the actual pH value in the acid treatment tank. Provided.
According to the invention of claims 4 and 5, it is possible to efficiently carry out sufficient acid treatment even for an acid treatment vessel of a seaweed net having various devices (winding rolls, sheet-like members).
According to the invention of claim 6, it is possible to provide an acid treatment vessel of a seaweed mesh which can reliably supply an acid stock solution into an acid treatment tank and can perform sufficient acid treatment efficiently.

BRIEF DESCRIPTION OF THE DRAWINGS It is drawing of the acid treatment ship of the seaweed network which shows 1st Embodiment of this invention, (a) is a schematic plan view, (b) is a schematic front view. (A) is the figure seen from the bottom side which shows an example of the tubular member used for the acid treatment ship of the seaweed net of FIG. 1, (b) is a schematic side view of FIG.1 (b). (A) is the figure seen from the bottom side which shows an example of the comparison form of the tubular member used for the acid treatment ship of the nori net of FIG. 1, (b)-(d) is an acid treatment of the nori net of FIG. It is each drawing seen from the bottom side which shows the other example of the tubular member used for ships. It is a drawing of the acid treatment vessel of the seaweed net which shows a 2nd embodiment of the present invention, (a) is a schematic front view, (b) is a schematic side view of (a), (c) is a tubular member and flexibility. It is a schematic diagram which shows an example of the attachment state with a tube. It is drawing of the acid treatment ship of the seaweed net which shows 3rd Embodiment of this invention, (a) is a schematic front view, (b) is a schematic side view of (a). It is a schematic plan view of an acid treatment vessel of a nori net showing the fourth embodiment of the present invention. It is drawing of the acid treatment ship of the seaweed net which shows 5th Embodiment of this invention, (a) is a schematic plan view, (b) is a schematic side view which shows an example of an implementation state. FIG. 6 is a layout drawing in which five handy pH meters for measurement in Test 2 are arranged so as to cover an acid treatment tank of an acid treatment vessel of a nori net.

Hereinafter, each embodiment of the present invention will be described in detail.
FIG. 1 is a drawing of an acid treatment vessel of a nori net showing the first embodiment of the present invention, where (a) is a schematic plan view, (b) is a schematic front view, and FIG. 2 (a) is a nori sea of FIG. The figure seen from the bottom side which shows an example of the tubular member used for the acid treatment ship of a net | network, (b) is a schematic side view of FIG.1 (b).
As shown in FIGS. 1 (a) and 1 (b), the acid-treated vessel A of the seaweed net of the first embodiment is at least provided in a resin-made vessel body 10 made of fiber reinforced plastic such as FRP. An acid treatment tank 15 for containing the acid treatment liquid 11, a take-up roll 20 for winding a mesh (not shown) provided in the acid treatment tank 15, and a central portion of the acid treatment tank 15. The support member 25, the sheet-like member 30 hanging down from the support member 25 toward the acid treatment liquid 11 of the acid treatment tank 15, and the acid stock solution Z of the acid treatment liquid 11 is supplied into the acid treatment tank 15. The pH value of the acid stock solution feeder 40 and the pH value of the acid treatment liquid 11 in the acid treatment tank 15 are detected, and the acid stock solution feeder 40 is operated based on the detected values to keep the acid treatment liquid 11 at a constant pH value. And a control unit 50 for controlling the

The acid treatment liquid 11 is an acid stock solution of an organic acid such as citric acid or malic acid [A commercially available acid treatment agent (liquid) if there is a commercial product, and in this embodiment, "Growgen" manufactured by Daiichi Sangyo Co., Ltd.] Z is an acid dilution liquid diluted with seawater or the like and having a predetermined pH value, for example, pH 1.7 to 2.3.
A constant amount (500 to 1,000 L) of the acid treatment solution 11 is contained in the acid treatment tank 15, and the nori seaweed network (not shown) which is taken up is attached to the nori seaweed network by the immersion treatment. Acid treatment.

  The acid treatment tank 15 is a rectangular concave formed at the center of the ship main body 10, and contains a predetermined amount of the acid treatment liquid 11. In the spaces 16, 16 on both sides of the acid treatment tank 15, an acid stock solution supply device 40, a control unit 50, a drive unit 22 such as a winding roll, a battery (not shown) for driving these, etc. are arranged. It is a space for workers to work.

The take-up roll 20 is a rotating shaft for taking up a nori net, and has at least one, but in the present embodiment, a pair of take-up rolls 20 are disposed at a predetermined place in the acid treatment tank 15. The take-up rolls 20, 20 are rotatably attached, and one take-up roll 20 sequentially takes up the forward mesh network when the ship body 10 advances (upper side in FIG. 1). The other take-up roll 20 takes up the rear side mesh sequentially when the ship body 10 moves backward (lower side in FIG. 1). Moreover, in this embodiment, the delivery rolls 21 and 21 used as the rotating shaft which draws | feeds a nori net to the sea side are rotatably attached to the both-sides vicinity of the supporting member 25. As shown in FIG.
The pair of winding rolls 20 and the feeding rolls 21 disposed on both sides of the support member are driven by drive units 22 and 22 each having an operating device provided in the space 16.

The support member 25 is formed of a rod-like member and is suspended at the central portion in the width direction of the acid treatment tank 15, and the upper surface portions on both sides of the acid treatment tank 15 via attachment members (not shown). Or directly fixed.
A sheet-like member 30 made of resin, which is a sheet-like member 30 made of soft vinyl chloride in the present embodiment, is attached to the supporting member 25 so as to descend toward the acid treatment liquid 11 of the acid treatment tank 15. It is arranged to the vicinity of the bottom in the acid treatment liquid 11 of the tank 15. A rod-like member 31 to be a weight (sink) is attached to the bottom of the sheet-like member 30.
This sheet-like member 30 serves as a member (curtain) for preventing entanglement due to direct contact between the nori nets wound around the winding roll 20 or the delivery roll 21 disposed on both sides of the sheet-like member 30. . Therefore, it is preferable that the lower part of the sheet-like member 30 be disposed to the vicinity of the bottom in the acid treatment liquid 11 of the acid treatment tank 15.

As shown in FIG. 1 (a), the acid stock solution supply device 40 is positioned at a suitable position in the space 16 of the acid treatment tank 15 (away from the acid treatment tank to such an extent that it does not interfere with winding and unwinding For example, it is disposed in the lower space of the operator easy seat, and supplies the acid stock solution Z of the acid treatment solution 11 into the acid treatment tank 15. In the present embodiment, the stock solution supply device 40 is connected with a stock solution tank 41 for storing the stock solution Z of the acid treatment solution 11 and a line 43 from the stock solution tank 41 via a pump 42.
The control unit 50 controls the acid treatment solution 11 at an appropriate position in the acid treatment tank 15 (at a central position where the average pH of the acid treatment tank can be detected and not interfered by the feed roll, for example, near the sheet-like member). A pH detector 51 for detecting a pH value is provided, and the pump 42 of the acid stock solution supply device 40 is operated based on the detection value detected by the pH detector 51 to convert the acid of the acid treatment solution into the acid treatment tank 15 It is an apparatus for supplying the undiluted | stock solution Z and controlling an acid treatment liquid to fixed pH value. The control unit 50 automatically adjusts the supply amount of the acid stock solution Z to be supplied based on the detection value of the pH detector 51.

A resin-made tubular member 60, in this embodiment, a FRP-made tubular member 60 is attached to both upper portions of the sheet-like member 30 in the vicinity of the support member 25 by means of a fitting 26 such as a binding band.
As shown in FIGS. 1 (b) and 2 (a) and 2 (b), the stock acid solution Z is supplied from one opening 60a to the tubular member 60, and the other end 60b is a plug member 60c. A plurality of discharge holes 61a, 61b,..., And five discharge holes 61a to 61e in the present embodiment are provided in the lower portion (bottom side) of the tubular member 60.
The tubular member 60 used in the present invention is not particularly limited as long as it has acid resistance, weather resistance, durability and the like to the acid stock solution Z other than FRP-made, and it is made of vinyl chloride , Or “PVC”, etc., and either opaque (that can not confirm the acid stock solution with the naked eye) or having visibility (the acid stock solution can be checked with the naked eye) Also, if it is transparent and semi-transparent, it is possible to visually confirm the liquid delivery state of the acid stock solution.

In the present invention, by minimizing the residual leakage and void loss in the tubular member 60 of the acid stock solution, the response time difference between the start and stop of the discharge of the pump and the discharge hole is eliminated, and the set pH value and the actual acid treatment tank The inner diameter of the tubular member 60 needs to be 3 to 8 mm so that sufficient acid treatment can be efficiently performed with a minimum deviation from the pH value of 3 and the number of discharge holes is 3 It is necessary that the number of the holes is 10 and the diameter of the discharge holes is 1.0 to 2.0 mm. Then, in order to adjust the ejection amount balance of the plurality of discharge holes and to further eliminate the concentration unevenness of the acid treatment tank, preferably, the inner diameter of the tubular member 60 is 3 to 5 mm, and the diameter of the first discharge hole 61a is set. On the other hand, it is desirable that the ratio of the hole diameter of the last discharge hole 61e be 1.08 to 1.27.
Here, the inner diameter of the tubular member 60 refers to the diameter of the portion through which the liquid (acid stock solution) actually flows by subtracting the thickness of the tube from the diameter (outer diameter) of the tubular member 60 [FIG. Illustrated code D of a). Moreover, it is preferable that the cross section perpendicular | vertical to the longitudinal direction of the tubular member 60 is circular. Also, when the vertical cross section is elliptical, the inner diameter of the tubular member 60 refers to the longest straight line drawn through the center of the vertical cross section of the tubular member. Preferably, the tubular member has a shape in which the inner diameter does not change in the longitudinal direction.
In addition, since the length of the tubular member 60 is disposed at an arbitrary position on the acid treatment tank 15 at a location that does not interfere with winding and unwinding of the nori net, the size of the acid treatment tank 15 etc. Although it varies, it is the same as the length of the acid treatment tank 15 in the width direction, or slightly longer or slightly shorter in consideration of the mounting mode. In the present embodiment, the length in the width direction of the acid treatment tank 15 is 210 cm, and the length of the tubular member 60 is 190 cm. The outer diameter of the tubular member 60 is preferably 8 to 13 mm.

The inner diameter of the tubular member 60 is 3 to 8 mm, preferably 3 to 7 mm, and more preferably 3 to 5 mm. If the inner diameter of the tubular member 60 is more than 8 mm, the remaining leak and void volume of the acid stock solution in the tubular member 60 increase, so that the set pH value deviates from the actual pH value in the acid treatment tank. On the other hand, when the inner diameter is less than 3 mm, it is not preferable because it becomes difficult to reduce the jet amount (total amount) and to adjust the jet amount balance of the plural discharge holes.
Further, the number of discharge holes 61 formed in the tubular member 60 varies depending on the length of the tubular member 60, ie, the size of the acid treatment tank 15 because it is disposed on the acid treatment tank 15. It is desirable that the number is 3 to 10 (per one tubular member), preferably 3 to 6, and particularly preferably 5 to 6. When the number of the discharge holes 61 is two or less, the number of discharge (including dripping) locations to the acid treatment tank 15 is small, and dissolution in the acid treatment tank 15 takes time, resulting in uneven concentration, If the number exceeds 10, the adjustment of the ejection amount balance of the plurality of ejection holes becomes complicated, which is not preferable.
Furthermore, if the hole diameter of the discharge hole is less than 1.0 mm, the discharge amount (total amount) can not be reduced and can not be uniformly distributed to the discharge holes 61, 61 ... of the tubular member 60. It becomes a factor of concentration unevenness, and on the other hand, if the hole diameter of the discharge hole is more than 2.0 mm, the pressure in the pipe tends to be insufficient, and stable pressure can be distributed to each discharge hole 61, 61 ... of the tubular member 60 This is not preferable because it causes uneven concentration in the acid treatment tank.
The ratio of the diameter of the last discharge hole 61e to the diameter of the first discharge hole 61a may be the same, but if it is less than 1.08 times, the amount of jetted out of the last discharge hole 61e will be slightly smaller. On the other hand, when the ratio of the hole diameter is more than 1.27 times, the ejection amount of the last discharge hole 61e is slightly excessive.
The relationship among the inner diameter, the number of discharge holes and the hole diameter, the ratio of the hole diameter, and the like will be described in detail in the examples and the like described later.

Between the discharge holes 61a, 61b ... of the tubular member 60 may be a predetermined distance, but when the number of discharge holes is four or more, the acid stock solution can be more uniformly discharged (including dripping) The distance between the first discharge hole and the second discharge hole (X ₁ ) is the same as the distance between the discharge hole immediately before the last discharge hole and the last discharge hole (X ₁ = X _{a -1} , A is the number of discharge holes), and the intervals between the second discharge hole (X ₂ ) and the discharge hole (X _a-1 ) immediately before the last discharge hole are the same (X ₂ = X ₃ = ...) is preferred.
In this embodiment, as shown in FIG. 2 (a), the acid stock solution is made more uniform from each discharge hole 61a to 61e in consideration of the pressure (water pressure) of the pump 42 of the acid stock solution Z and the length of the tubular member. The distance (length) between the discharge holes 61a, 61b... Is varied from the point of discharge (including dripping), and the distance (X ₁ ) between the first discharge hole 61a and the second discharge hole 61b; The distance (X ₄ ) between the discharge hole 61 d immediately before the last discharge hole and the last discharge hole 61 e is the same, and the discharge hole just before the last discharge hole from the _second discharge hole (X ₂ ) It is desirable that each interval of each interval (X ₃ ) of is the same (X ₂ = X ₃ ).

In this embodiment, the tubular member 60 has a length of 190 cm (total length X: one end to the other end, the same applies hereinafter), an inner diameter of 3 mm, an outer diameter of 8 mm, and five discharge holes 61a to 61e. a discharge first discharge hole 61a (central, hereinafter the same) interval between (distance _{X 0)} is 35 cm, the first discharge hole 61a and the interval to the next discharge hole 61b (distance _{X 1)} is 40 cm, the following The distance (distance X ₂ , distance X ₃ ) to the holes 61 c and 61 d is 20 cm for each, the distance (distance X ₄ ) to the next discharge hole 61 e is 40 cm, and the diameter of the discharge holes 61 a to 61 d is 1. The hole diameter of 5 mm and the last discharge hole 61 e is 1.9 mm (1.27 times).
The inner diameter of the tubular member 60, the distance (distance) between the discharge holes 61a to 61e, the hole diameter (size of the holes) of each discharge hole, the number thereof, etc. It can be varied in each of the above ranges depending on the species and the like. The length (X ₀ ) from the end to be the inlet of the tubular member 60 to the first discharge hole varies depending on the size of the processing tank and the manner of attachment, but the total length X is 0.12X to 0. It is preferably 25X.

The acid treatment operation of the nori net by the acid treatment vessel of the nori net according to the first embodiment configured as described above will be described below. In addition, since it is the same in the case where ship body 10 advances, and the case where it reverses, in this embodiment, only the case (upper side of Drawing 1) where ship body 10 advances is explained.
After moving the ship body 10 forward with the force to take up the nori net after moving the acid treatment vessel A of nori net to the sea on which the nori net is aquacultured, the nori net will be treated with acid as it advances. The lava net which has invaded from the front into the tank 15 and has invaded is taken up sequentially by the take-up roll 20 as the take-up roll 20 is rotated by the drive of the drive unit 22. The rolled-up nori net is dipped in the acid treatment liquid 11 contained in the acid treatment tank 15 to acid-treat the nori.
In the acid treatment tank 15, the pH of the acid treatment liquid 11 is detected by the pH detector 51, and the detection value detected by the pH detector 51 is output to the control unit 50. The control unit 50 performs feedback control of the pump 42 of the acid stock solution supply device 40 based on the detection value input from the pH detector 51 and the control threshold value set in advance. The pump 42 sucks out a predetermined amount of acid stock solution Z corresponding to the operation signal from the acid stock solution tank 41 based on the operation signal input from the control unit 50 and supplies it to the tubular members 60 and 60 through the line 44. Further, the control unit 50 can automatically adjust the supply amount of the acid stock solution Z supplied to the acid treatment liquid 11 by controlling the pump 42 based on the detection value of the pH detector 51.

The acid stock solution Z sucked from the acid stock solution tank 41 by the pump 42 having received the operation signal from the pH detector 51 is supplied to the tubular members 60, 60, and a plurality of discharges provided in the tubular members 60, 60. The holes 61a, 61b,... Are discharged (dropped) into the acid treatment liquid 11. The acid stock solution Z dropped into the acid treatment solution 11 dissolves immediately in the acid treatment solution 11. The solubility is such that the acid treatment solution 11 is in a stirring state due to the circulation of water generated in the acid treatment solution 11 by shaking of the ship body 10, rotation of the winding roll 20, etc. As a result, it dissolves and diffuses in the acid treatment liquid 11 diluted with seawater in the acid treatment, whereby the pH value which has fluctuated to a high value in the acid treatment liquid 11 can be made a predetermined pH value. In addition, the display of pH value can also be confirmed on the waterproof pH display liquid crystal screen etc. (not shown) with which the control part 50 was equipped.
The nourishing net to which the acid-treated cultured nori is attached is further taken up on the take-out roll 21 after taking up on the take-up roll 20, and after being acid-treated, the nori net being wound on the delivery roll 21 is As the ship body 10 moves forward, it will be installed at the place where the unwound net was taken out and taken out of the ship body 10.

  According to the acid treatment vessel A of the seaweed network of the first embodiment configured as described above, the acid stock solution supply device 40 includes a plurality of discharge holes for discharging the acid stock solution Z provided in the vicinity of the support member 25. Are set by setting the inner diameter of the tubular member 60, the number of discharge holes 61a, and the hole diameter of the discharge holes 61a to the above specific ranges. The difference between the above pH value and the actual pH value in the acid treatment tank is minimized, and it is possible to obtain an acid treatment vessel of a seaweed net that can perform sufficient acid treatment efficiently. Preferably, in addition to the above conditions, the ratio of the diameter of the last discharge hole 61e to the diameter of the first discharge hole 61a is set to the range of the above specific ratio (1.08 to 1.27 times). Furthermore, the deviation between the set pH value and the actual pH value in the acid treatment tank is extremely minimized, and it is possible to obtain an acid treatment vessel of a seaweed net that can perform sufficient acid treatment more efficiently.

  As described above, the tubular member 60 used in the present invention needs to have an inner diameter of 3 to 8 mm, a number of discharge holes of 3 to 10, and a hole diameter of 1.0 to 2.0 mm. Further preferably, the ratio of the hole diameter of the last discharge hole to the hole diameter of the first discharge hole is 1.08 to 1.27 times, whereby the remaining leak or void of the acid stock solution in the tubular member 60 is obtained. By minimizing the loss, the response time difference between the start and stop of the discharge from the pump and the discharge hole is eliminated, the deviation between the set pH value and the actual pH value in the acid treatment tank is minimized, and the inside of the acid treatment tank is minimized. Thus, sufficient acid treatment can be performed more efficiently by preventing the occurrence of uneven density.

(B)-(d) of Drawing 3 are each drawing seen from the bottom side which shows other examples of tubular member 60 used for an acid treatment ship of a seaweed net of the above-mentioned embodiment. FIG. 3A is a drawing of a comparative embodiment.
In FIG. 3A, the tubular member 60 (FRP material) has a length of 200 cm, an inner diameter of 3 mm, an outer diameter of 8 mm, and has two discharge holes 61a and 61b, and the distance to the first discharge hole 61a. The distance (distance X ₀ ) is 70 cm, the distance (distance X ₁ ) between the first discharge hole 61 a and the next discharge hole 61 b is 60 cm, the hole diameter of the discharge hole 61 a is 1.2 mm, and the last discharge hole 61 b is The hole diameter is 1.5 mm (1.25 times).
In FIG. 3B, the tubular member 60 (FRP material) has a length of 200 cm, an inner diameter of 3 mm, an outer diameter of 8 mm, and has three discharge holes 61a to 61c, and the distance to the first discharge hole 61a. The distance (distance X ₀ ) is 50 cm, the distance (distance X ₁ ) between the first discharge hole 61 a and the next discharge hole 61 b is 50 cm, and the distance (distance X ₂ ) to the next discharge hole 61 c is 50 cm, The diameter of the discharge holes 61a to 61b is 1.2 mm, and the diameter of the last discharge hole 61c is 1.5 mm (1.25 times).
In FIG. 3C, the tubular member 60 (FRP material) has a length of 200 cm, an inner diameter of 3 mm, an outer diameter of 5 mm, and has six discharge holes 61a to 61f, and the distance to the first discharge hole 61a. The distance (distance X ₀ ) is 25 cm, the distance (distance X ₁ ) between the first discharge hole 61 a and the next discharge hole 61 b is 30 cm, and the distance (distance X ₂ , distance X ₃ ) to the next discharge holes 61 c, 61 d, 61 e The distance (distance X ₄ ) is 30 cm for each, the distance (distance X ₅ ) to the next discharge hole 61 f is 30 cm, the hole diameter of the discharge holes 61 a to 61 e is 1.2 mm, and the hole diameter of the last discharge hole 61 f is 1 It has become .2 or 1.3 or 1.5 or 1.6 mm (1.00 or 1.08 or 1.25 or 1.33 times).
In FIG. 3D, the tubular member 60 (transparent polyvinyl chloride material) has a length of 200 cm, an inner diameter of 5 mm, an outer diameter of 10 mm, and has six discharge holes 61a to 61f up to the first discharge hole 61a. spacing (distance _{X 0)} is 25 cm, the first discharge hole 61a and the interval to the next discharge hole 61b (distance _{X 1)} is 30 cm, the next discharge hole 61c, 61d, distance to 61e (distance _{X 2,} the distance The distance (distance X ₅ ) to the next discharge hole 61 f is 30 cm, X ₃ , distance X ₄ ) is 30 cm, the hole diameter of the discharge holes 61 a to 61 e is 1.8 mm, and the hole diameter of the last discharge hole 61 f Is 2.0 or 2.1 [comparative embodiment] mm (1.11 or 1.17 times).

FIG. 4 is a drawing showing the main part of a seaweed net acid treatment vessel according to a second embodiment of the present invention. In the following second to fifth embodiments, the same configuration as that of the first embodiment indicates the same reference numeral in the drawings, and the description thereof will be omitted.
The acid-treated vessel B of the seaweed net according to the second embodiment of the present invention has the acid-treated solution 11 which discharges the acid stock solution Z discharged from the discharge holes 61a to 61e to the discharge holes 61a to 61e of the tubular member 60. The flexible tubes 62, 62 ... made of resin, elastomer or rubber that lead to the liquid surface are fixed, welded, attached by attachment or the like.
When the length (distance) from the lower part of the tubular members 60, 60 to the liquid surface Y is W as shown in FIG. 4A, the lengths of the flexible tubes 62, 62 ... having visibility are as shown in FIG. The length of the tubes 62a, 62a ... in this embodiment is 2/3 W, and if it is this length, the acid stock solution Z discharged from the flexible tubes 62a, 62a ... having visibility is a sheet member It will be dripped in an acid treatment liquid, without adhering to 30 further.

  In addition, the flexible tubes 62, 62, ... may be any one having visibility (the acid stock solution can be confirmed with the naked eye), and may be either transparent or translucent, and flexible if it is transparent or translucent. The dripping of the acid stock solution Z in the sexing tube can be visually confirmed. In addition, the flexible hole diameter (inner diameter) having visibility is the same as or larger than the hole diameter of the discharge holes 61a to 61e 61, and in the present embodiment, the inner diameter is 6 mm and transparent visual recognition made of vinyl chloride It consists of a flexible tube having elasticity.

Also in the second embodiment, as in the first embodiment, the pH value of the acid treatment liquid which has been changed to a high value by the acid treatment operation is set to a predetermined pH by the operation of the acid stock solution supply device 40, the control unit 50 and the like. The inner diameter of the tubular member 60, the number of the discharge holes 61a, the diameter of the discharge holes 61a, and the diameter of the last discharge hole 61e with respect to the diameter of the first discharge hole 61a. By setting the ratio of the pore diameter to each of the above specific ranges, the difference between the set pH value and the actual pH value in the acid treatment tank is minimized, and concentration unevenness in the acid treatment tank does not occur. Therefore, sufficient acid treatment can be performed efficiently. Furthermore, in the present embodiment, since the acid stock solution Z is not discharged to the sheet-like member 30, the undiluted solution Z does not adhere to the sheet-like member 30, and the rolled-up seaweed mesh does not adhere to the sheet-like member 30. There is no contact with the remaining acid stock solution, there is no splash of acid stock solution, the acid treatment solution can reliably treat the seaweed network with the acid treatment solution, and there is no consumption of waste acid stock solution. It will be obtained.
In the second embodiment, although the length of the flexible tubes 62a, 62a... Having visibility is set to 2 / 3W, the acid stock solution in which the attachment position of the tubular members 60, 60 is discharged to the sheet member 30 If it is attached to a place where Z can not be attached, it may be 1/3 W of the length to the liquid surface of the acid treatment liquid, and the length W of the flexible tubes 62a, 62a ... having visibility is The length until contact with the liquid surface, or the length which penetrates into the acid treatment liquid 11 which is lower than the liquid level Y may be used.

FIG. 5 is a drawing showing the main part of a seaweed net acid treatment vessel according to a third embodiment of the present invention.
In the acid treatment vessel C of the seaweed net showing the third embodiment of the present invention, the tubular members 60, 60 provided with a plurality of discharge holes 61a, 61b, ... for discharging the acid stock solution are in the vicinity of the liquid level Y of the acid treatment liquid Specifically, it is provided at an upper portion of 1 to 15 cm from the liquid level Y. In this embodiment, it is provided in the upper part of 5 cm from the liquid level Y.
Also in the third embodiment, as in the first embodiment, the pH value of the acid treatment liquid which has been changed to a high value by the acid treatment operation is set to a predetermined pH by the operation of the acid stock solution supply device 40, the control unit 50 and the like. The inner diameter of the tubular member 60, the number of the discharge holes 61a, the diameter of the discharge holes 61a, and the diameter of the first discharge hole 61a are the last discharge holes 61e. By setting the ratio of the pore diameter of each to the above specific range, the difference between the set pH value and the actual pH value in the acid treatment tank is minimized, and the concentration unevenness in the acid treatment tank does not occur. As a result, an acid treatment vessel of a seaweed net that can perform sufficient acid treatment efficiently can be obtained. Furthermore, since the tubular members 60, 60 provided with the discharge holes 61a, 61b, ... for discharging the acid stock solution are provided in the vicinity of the liquid level Y of the acid treatment liquid, the discharge holes 61a, 61b of the tubular members 60, 60 are provided. The discharge of ... can be confirmed with the naked eye, the acid stock solution does not adhere to the sheet-like member 30, and the rolled-up nori net does not contact the acid stock solution remaining on the sheet-like member 30, An acid treatment vessel of a seaweed net which can be acid treated with an acid treatment solution can be obtained.

FIG. 6 is a drawing showing the main part of a seaweed net acid treatment vessel according to a fourth embodiment of the present invention.
The acid treatment vessel D of the nori net according to the fourth embodiment of the present invention has a form in which the sheet-like member 30 does not exist, and the supporting members 26, 26 provided at both ends of the acid treating tank 15 The tubular members 60, 60 having the discharge holes 61a to 61e similar to those of the first embodiment are attached, which are different from the first embodiment.
Also in the fourth embodiment, it is possible to automatically adjust the pH value of the acid treatment liquid, which has been changed to a high value by the acid treatment operation, to a predetermined pH value by the operation of the acid stock solution supply device 40, the control unit 50, etc. The inner diameter of the tubular member 60, the number of the discharge holes 61a, the hole diameter of the discharge holes 61a, and the ratio of the hole diameter of the last discharge hole 61e to the hole diameter of the first discharge hole 61a are the first embodiment. By setting each specific range described in detail, the difference between the set pH value and the actual pH value in the acid treatment tank is minimized, and the concentration unevenness in the acid treatment tank is prevented. As a result, it is possible to obtain an acid treatment vessel of a nori net which can carry out sufficient acid treatment efficiently.

FIG. 7 is a drawing showing the main part of a seaweed net acid treatment vessel according to a fifth embodiment of the present invention.
The acid treatment vessel E of the seaweed net according to the fifth embodiment of the present invention is applied to a pure-through acid treatment vessel not provided with a winding roll, and a support member 26 provided at the advancing side end of the acid treatment tank 15 The tubular member 60 [Fig. 2 (a), Fig. 3 (b) to (d), etc.] having the discharge holes 61a, 61b ... similar to those of the first embodiment is attached thereto.
Also in the fifth embodiment, it is possible to automatically adjust the pH value of the acid treatment liquid, which has been changed to a high value by the acid treatment operation, to a predetermined pH value by the operation of the acid stock solution supply device 40, the control unit 50, etc. The inner diameter of the tubular member 60, the number of discharge holes 61a, the hole diameter of the discharge holes 61a, and the ratio of the hole diameter of the last discharge hole 61c or f to the hole diameter of the first discharge hole 61a By setting each specific range described in detail in the embodiment, deviation between the set pH value and the actual pH value in the acid treatment tank is minimized, and concentration unevenness in the acid treatment tank does not occur. As a result, an acid treatment vessel of a seaweed net that can perform sufficient acid treatment efficiently can be obtained.

The acid treatment work (penetration treatment) of the nori net by the acid treatment vessel of the nori net according to the fifth embodiment configured as described above will be described below (Fig. 7 (b)).
After moving the acid treatment vessel E of the nori net to the sea where the nori net N cultivating fish is moved, the nori net guide 71 is made to underlie the nori net N, and the ship body 10 is shown (progress When moving forward by the driving force of the outboard motor 70, as it moves forward, the seaweed net N intrudes into the acid treatment tank 15 from the front, and the invaded seaweed net N has a cylindrical shape with both ends closed, such as polyvinyl chloride. It passes under the floating body (commonly known as "Koro") 72 and is dipped in the acid treatment liquid 11 contained in the acid treatment tank 15, whereby the seaweed is acid treated.
In the acid treatment tank 15, the pH of the acid treatment liquid 11 is detected by the pH detector 51, and the detection value detected by the pH detector 51 is output to the control unit 50. The control unit 50 performs feedback control of the pump 42 of the acid stock solution supply device 40 based on the detection value input from the pH detector 51 and the control threshold value set in advance. The pump 42 sucks out the acid stock solution Z of a predetermined amount according to the operation signal based on the operation signal input from the control unit 50 and supplies the acid stock solution tank 41 to the tubular member 60 through the line 44. Further, the control unit 50 can automatically adjust the supply amount of the acid stock solution Z supplied to the acid treatment liquid 11 by controlling the pump 42 based on the detection value of the pH detector 51.
The acid stock solution Z sucked from the acid stock solution tank 41 by the pump 42 having received the operation signal from the pH detector 51 is supplied to the tubular member 60, and a plurality of discharge holes 61a, 61b provided in the tubular member 60. .. Are discharged (dropped) into the acid treatment liquid 11. The acid stock solution Z dropped into the acid treatment solution 11 dissolves immediately in the acid treatment solution 11. With regard to the solubility, the acid stock solution Z is water-soluble, and the acid treatment liquid 11 is produced by the circulation, etc. generated in the acid treatment liquid 11 by the propulsion of the ship main body 10, the passage of the nori net and the rotation of the roller 72. By being in a state of stirring, it dissolves and diffuses in the acid treatment liquid 11 diluted with seawater in the acid treatment, thereby setting the pH value fluctuated to a high value in the acid treatment liquid 11 to a predetermined pH value. Can. In addition, the display of pH value can also be confirmed on the waterproof pH display liquid crystal screen etc. (not shown) with which the control part 50 was equipped.
The ridged network N to which the acid-treated cultured nori is adhered passes below the roller 72 and is acid-treated, and as the ship body 10 further moves forward, it is positioned outside the ship body 10 and to the ship rear side. N will return to the original aquaculture sea level.

The acid treatment vessel of the seaweed network of the present invention comprises at least an acid treatment tank for containing an acid treatment solution, an acid stock solution supply device for supplying a stock solution of the acid treatment solution into the acid treatment tank, and an acid treatment tank in the acid treatment tank. A control unit for detecting a pH value of a processing solution and operating the acid stock solution supply device based on the detected value to control the acid processing solution to a constant pH value. The acid stock solution supply device includes at least one or more bottomed cylindrical tubular members having a plurality of discharge holes for spouting the acid stock solution at any position on the acid treatment tank, and the tubular member The gist of the present invention is not limited to the first embodiment to the fifth embodiment described above, because the inner diameter, the number of discharge holes, and the hole diameter of the discharge holes are specified ranges. In the range which does not change, the embodiment of each of the following modifications can be adopted.
For example, in the case of an acid treatment vessel of a nori net having the various devices (winding rolls, sheet-like members, etc.) of the first to fourth embodiments, two tubular members are provided on both sides of the sheet-like members. , Optional components on the acid treatment tank at locations that do not interfere with winding and unwinding of the nori net like the take-up roll of the fifth embodiment and the no acid sheet ship (liner) of nori sheet having no sheet-like member It may be only one (one side) at any position as long as it is disposed at the position, and the winding of the nori net by the form of the acid treatment tank to be applied, the presence or absence of the winding roll and the sheet-like member, etc. A plurality of three or more may be provided at any position on the acid treatment tank, which is a location that does not interfere with feeding and the like.
Furthermore, the manner of attachment may be vertical or oblique as well as horizontal with respect to the acid treatment vessel.

  Next, the present invention will be described in more detail by way of examples and comparative examples, but the present invention is not limited by the following examples and the like.

[Examples 1 to 21 and Comparative Examples 1 to 11]
[Test 1]
Using the test device of the seaweed mesh acid treatment vessel of the following configuration, for the inner diameter of each tubular member (tubular members 1 to 32) shown in Table 1 below, the number of discharge holes, the diameter of discharge holes, the diameter of the first discharge holes On the other hand, tests were conducted on the balance between the ejection amount of the acid stock solution from each ejection hole and the response time difference between the pump and the ejection according to the following test method using the one in which the ratio of the hole diameter of the last ejection hole was varied.

(Main configuration of the test equipment of Nori fish net acid treatment vessel)
Acid stock solution Z: manufactured by Daiichi Sangyo Co., Ltd. "Glogen"
Pump 42: Electromagnetic drive metering pump EHN, manufactured by Iwaki (discharge volume: 1000 ± 50 ml / min)
Size, etc. of tubular member 60: each dimension shown in Table 1 below

(Test method)
The pump 42 was started, the acid stock solution Z was fed to the tubular member 60, the tube was previously filled with the acid stock solution, and the pump 42 was stopped. After that, the pump 42 was started and stopped for 1 minute, and the stock solutions ejected from the discharge holes of the tubular members were collected, respectively, and the amount of discharge from the discharge holes was measured (divided into two tubular members If the sum of the two holes in each case). The relative difference between the ejection amounts of the first ejection hole and the last ejection hole, the second ejection hole and the ejection hole immediately before the last, the ejection holes in the first half and the ejection holes in the second half Balance was calculated.
In addition, the time of pump start and the start of ejection from all discharge holes of the tubular member, and the time of pump stop and the stop of ejection from all discharge holes of the tubular member were measured, and the response time difference between the pump and discharge was calculated.
The indication of each evaluation of these ejection amount balance and pump / ejection response time difference is shown below, and the evaluation result is shown in the following Table 2.

[Indication of evaluation]
The ejection amount balance is preferably 50% or less, more preferably 35% or less, more preferably less than 20%, particularly preferably less than 10%.
The pump / jet response time difference is preferably less than 3 seconds, more preferably 2 seconds or less, more preferably 1 second or less.

[Test 2]
1 and 2 and using the acid treatment vessel of the seaweed net of the following configuration, the inner diameter of each tubular member (tubular members 1 to 32) shown in Table 1 below, the number of discharge holes, the diameter of the discharge holes, first The test was conducted on the deviation between the set pH value and the actual pH value in the acid treatment tank by the following test method using the ratio of the diameter of the last discharge hole to the diameter of the last discharge hole was varied. went.

(Main composition of the acid treatment vessel of nori net)
Acid stock solution Z: manufactured by Daiichi Sangyo Co., Ltd. "Glogen"
Sea water contained in the acid treatment tank 15: 800 L (Sea water collected from Ariake Sea, Arao City, Kumamoto Prefecture, and so on)
Pump 42: Electromagnetic drive metering pump EHN, manufactured by Iwaki (discharge volume: 1000 ± 50 ml / min)
Control unit 50: A device for automatically adjusting the supply amount of the acid stock solution Z to be supplied based on the detection value of the pH detector 51.
pH detector 51: PET-M3, manufactured by Sem Corporation, size of tubular member 60, etc .: each dimension shown in Table 1 below: pH meter for measurement: handy pH meter "TPX-999", manufactured by Toko Chemical Laboratory Co., Ltd.

(Test method)
The pH of the treatment solution in the acid treatment tank 15 of the acid treatment vessel of the seaweed mesh was adjusted to 2.00 in advance using Grogen (treatment solution temperature: 18 ° C.). The set pH of the control unit 50 is 2.00. The acid treatment tank 15 is continuously supplied with 30 L / min of seawater (for dilution) while being stirred by rotating the take-up roll of the acid treatment vessel, and the treatment liquid of the same volume is continuously supplied to the outside of the treatment tank. It was drained. The control unit 50 is operated for 10 minutes in a situation where the treatment liquid in the acid treatment tank 15 is continuously diluted (simulating the acid treatment of a nori fish farm) and displayed on the monitor of the pH detector 51. The pH was measured to calculate the difference (difference) in pH from the set pH and the fluctuation of control (maximum value minus minimum value).
In addition, five handy pH meters for measurement are arranged at five points so as to cover the inside of the acid treatment tank 15 (<1>, <2>, <3>, <4>, <4 from the side closest to the first discharge hole) The arrangement was made in the order of 5>, see FIG. 8), and pH variation in the acid treatment tank 15 (value obtained by subtracting the minimum value from the maximum value in each point average) was calculated. When the number of tubular members was one, it was attached to the upper side of the support member 25 on FIG.
The evaluations of the pH deviation, the control fluctuation range, and the pH fluctuation which are the evaluations of these tests 2 are shown below, and the evaluation results are shown in Table 2 below.

[Indication of evaluation]
0.03 or less is preferable and, as for pH deviation, 0.02 or less are especially preferable (all are absolute values).
The control deviation is preferably 0.06 or less, more preferably 0.05 or less, and particularly preferably 0.04 or less.
The pH variation is preferably 0.1 or less, more preferably 0.06 or less, and preferably 0.04 or less.

〔Comprehensive judgment〕
:: relative difference (balance) of ejection amount 15% or less, pump / ejection response time difference 1 second or less, pH deviation 0.02 or less, control fluctuation width 0.05 or less, pH variation 0.04 or less ○: relative of ejection amount Difference (balance) 20% or less, Pump / jet response time difference 2 seconds or less, pH deviation 0.02 or less, control fluctuation width 0.06 or less, pH variation 0.06 or less Δ〜: Relative difference of jet amount (balance) 50% or less, pump / jet response time difference 2 seconds or less, pH deviation 0.03 or less, control fluctuation width 0.06 or less, pH variation 0.10 or less Δ: relative difference (balance) of ejection amount 60% or less, pump / Difference in ejection response time 2 seconds or less, pH deviation 0.05 or less, control fluctuation width 0.10 or less, pH variation 0.15 or less ×: In each evaluation standard of the above Δ, at least 2 or more are the reference of Δ I do not meet.

  As is clear from the results of Tables 1 and 2 (Tests 1 and 2), each of the discharge holes of the tubular member according to Examples 1 to 21 of the present invention is compared with Comparative Examples 1 to 11 falling outside the scope of the present invention. It is confirmed that the relative difference of the ejection amount is small and the ejection amount balance of the tubular member is good, the time difference between the pump start / stop and the ejection start / stop is extremely small, and the pump / ejection response is good. confirmed. Further, according to Test 2, the tubular member of the scope of the present invention is such that the difference between the set pH value and the actual pH value in the acid treatment tank is minimized and that the concentration unevenness in the acid treatment tank does not occur. It has been confirmed that the use of No. 1 can provide an acid treatment vessel of nori net which can perform sufficient acid treatment efficiently. From these results, it is apparent for the first time that a tubular member having an inner diameter of 3 to 7 mm, a number of discharge holes of 3 to 10, and a hole diameter of 1.0 to 2.0 m is excellent. It became. Furthermore, in addition to the above conditions, a tubular member in which the ratio of the hole diameter of the last discharge hole to the hole diameter of the first discharge hole is 1.08 to 1.27 (Examples 2, 4, 5, 7, 10, 11, 17) proved to be particularly excellent.

  It can use suitably for the acid treatment ship of the seaweed net which can acid-treat efficiently fungi, such as diatoms and red-rot fungi adhering to a seaweed net during aquaculture, with an acid treatment agent (liquid).

A Acid Treating Ship of A-Line Mesh 10 Ship Body 11 Acid Treating Solution 15 Acid Treating Tank 20 Winding Roll 25 Support Member 30 Sheet-like Member 40 Acidic Liquid Supply Device 50 Control Unit 60 Tubular Member 61a to 61e Discharge Hole 62 Having Visibility Flexible tube

Claims (6)

  At least an acid treatment tank containing an acid treatment solution, an acid stock solution supply device for supplying a stock solution of the acid treatment solution into the acid treatment tank, and a pH value of the acid treatment solution in the acid treatment tank are detected. An acid treatment vessel of a nori net comprising: a control unit which operates the acid stock solution supply device based on a detected value to control the acid treatment liquid to a constant pH value, the acid stock solution supply device comprising While providing at least one bottomed cylindrical tubular member having a plurality of discharge holes for discharging an acid stock solution at any position on the acid treatment tank, the tubular member has an inner diameter of 3 to 8 mm, and discharge An acid-treated vessel for a seaweed mesh, characterized in that the number of holes is 3 to 10 and the diameter of the discharge holes is 1.0 to 2.0 mm. The ratio of the hole diameter of the last discharge hole is 1.08 to 1.27 times the hole diameter of the first discharge hole of the said tubular member, The acid-treated ship of the seaweed network of Claim 1 characterized by the above-mentioned. When the number (a) of the discharge holes of the tubular member is four or more, the interval (X ₁ ) between the first discharge hole and the second discharge hole, and the discharge hole one before the last discharge hole The distance between the last discharge holes is the same (X ₁ = X _a−1 , where a is the number of discharge holes), and the second discharge hole (X ₂ ) to the discharge hole (X one before the last discharge hole) _a-1) according to claim 1 or 2 nori network acid treatment vessel according each interval is equal to or the same _{(X 2 = X 3 = ...} ) of.   The acid treatment vessel of a seaweed mesh is provided with a take-up roll for winding the seaweed mesh in an acid treatment tank, The acid treatment of the seaweed mesh according to any one of claims 1 to 3 boat.   The acid-treated vessel of the seaweed mesh has a support member suspended at a central portion of the acid treatment tank, and a sheet-like member suspended from the support member to the acid treatment liquid of the acid treatment tank, the sheet The said tubular member was provided in the one side or both sides of the rod-like member, The acid-treated ship of the seaweed network as described in any one of Claims 1-4 characterized by the above-mentioned.   A flexible tube having visibility is attached to each discharge hole of the tubular member, The acid-treated ship of seaweed mesh according to any one of claims 1 to 5.

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