JP4787609B2 - Levitation concentration equipment - Google Patents

Description

  The present invention oxidizes dissolved components in the liquid supplied from below by air bubbles, deposits the dissolved components on the surface of the bubbles as solids, and bubbles together with the solids already contained in the liquid. The concentrated liquid of the solid matter that floated upward is removed by flowing out from the overflow port through the overflow pipe, and the non-concentrated liquid after removing the concentrated solution is removed from the liquid suction port. Floating concentration provided with an oxidation tower that discharges from the liquid and concentrates solids in the liquid, and a storage tank that has a structure in which the concentrated liquid that flows out from the oxidation tower through the overflow pipe is ejected to the inside Regarding equipment.

As such a floating concentration facility, for example, sulfur (S) as a solid matter is levitated and concentrated to be removed from a desulfurization liquid that has absorbed hydrogen sulfide (H ₂ S) as a dissolved component contained in fuel gas. There is equipment, and conventionally, the structure shown in FIGS. 7 and 8 is known (for example, see Patent Document 1).
According to this prior art, the liquid suction port 7 is disposed in the oxidation tower 1, and one overflow port 4 is provided on the peripheral wall of the oxidation tower 1 in a state positioned above the liquid suction port 7. An overflow pipe 5 is connected to the overflow port 4. The overflow pipe 5 is connected to the storage tank 2, and the storage tank 2 is provided with a stirrer 13 for stirring the concentrated liquid in the storage tank 2.

Japanese Patent Publication No.62-32965

However, in the above-described prior art, since there is only one overflow port 4, the solid concentrate that has floated upwards sinks before the solid concentrate flows out of the overflow port 4. There was a risk of being sucked into the liquid suction port 7 located below. In particular, the concentrated liquid floating on the opposite side of the overflow port 4 crosses over the liquid suction port 7 and reaches the overflow port 4, so that solids sink and are sucked into the liquid suction port 7. The possibility is very high, and there is a drawback that the solid matter cannot be efficiently removed as desired.
For the storage tank 2, a stirrer 13 for stirring the concentrated liquid is necessary to prevent solids from settling on the bottom of the storage tank 2, which is the initial cost and running cost of the floating concentration equipment. It was one of the causes of high costs.

  The present invention pays attention to such conventional problems, and its purpose is to improve the solids recovery rate by efficiently and quickly discharging the floated solid concentrate from the overflow port. Another object of the present invention is to provide a floating concentration facility that can reduce the initial cost and the running cost.

The first characteristic configuration of the present invention is that a dissolved component in a liquid supplied from below is oxidized by air bubbles, and the dissolved component is precipitated as a solid on the surface of the bubbles, and is already contained in the liquid. Concentrate by floating upward with air bubbles along with the solids that have been removed, and removing the concentrated solids that have floated through the overflow port through the overflow pipe, and removing the concentrated liquid. An oxidizing tower that discharges the concentrated liquid from the liquid suction port to concentrate and remove solids in the liquid, and a storage tank that has a structure in which the concentrated liquid that flows out from the oxidizing tower through the overflow pipe is ejected to the inside. And a plurality of the overflow ports provided near the periphery of the oxidation tower above the liquid suction port, and each of the overflow ports flow tube is connected, ejection of a plurality of ejecting the concentrate obliquely downward But provided in the overflow tube tip a plurality of which are introduced into the interior of the reservoir, there is to that a plurality of ejection ports are disposed below the overflow port.

According to the first characteristic configuration of the present invention, a plurality of overflow ports for discharging the solid concentrate are provided and are arranged near the periphery of the oxidation tower above the liquid suction port. Thus, the concentrated liquid of the solid matter is discharged relatively quickly from one of a plurality of overflow ports arranged near the periphery without traversing above the liquid suction port. There is little possibility that an object descends and sinks and is sucked into the liquid suction port.
And since the overflow pipe is connected to each of the plurality of overflow ports, the concentrated liquid discharged from the overflow port is smooth without stagnation at the overflow port and its vicinity. Will flow. That is, if an overflow weir and trough are provided around the oxidation tower and the concentrated liquid is discharged, the concentrated liquid may stagnate in the trough and cause clogging due to sedimentation of solid matter. Concentrate can be smoothly flowed and discharged without the risk of clogging. As a result, solid concentrate can be discharged quickly and efficiently from the overflow port, improving the solids recovery rate. Can be made.
A plurality of spouts for ejecting the concentrated liquid obliquely downward are provided at the ends of a plurality of overflow pipes introduced into the storage tank, so that they are ejected obliquely downward from the plurality of spouts. The concentrated liquid in the storage tank will be hydraulically stirred, and the multiple outlets are arranged below the overflow outlet, so there is a difference in height between the overflow outlet and the outlet. Using this, the concentrated liquid can be ejected vigorously from each ejection port.
Therefore, if a sufficient level difference between the overflow port and the jet port can be ensured, the concentrated liquid in the storage tank can be reliably agitated without the need for a driving source such as electric power. However, it is only necessary to provide a relatively small stirrer, and the initial cost and running cost of the floating concentration equipment can be reduced.

According to a second characteristic configuration of the present invention, the plurality of jet nozzles generate a stirring swirl flow of the concentrated liquid swirling around the center of the storage tank in a plan view of the storage tank by the concentrated liquid ejected from the jet outlets. It is in the place where it is arranged eccentrically .

  According to the second characteristic configuration of the present invention, the plurality of jet outlets generate the swirling flow of the concentrated liquid swirling around the center of the storage tank in the plan view of the storage tank by the concentrated liquid ejected from the jet outlets. Therefore, the concentrated solution in the storage tank is agitated while turning in the circumferential direction in the storage tank, so that the agitation effect of the concentrated solution becomes more reliable and better. .

A third characteristic configuration of the present invention is that the overflow port is provided on a peripheral wall of the oxidation tower.

According to the third characteristic configuration of the present invention, since the overflow port is provided on the peripheral wall of the oxidation tower, the concentrated solid liquid floating above can be efficiently and quickly supplied from the overflow port provided on the peripheral wall. Can be discharged .

A fourth characteristic configuration of the present invention is that the overflow port is provided at a tip of the overflow pipe introduced into the oxidation tower.

According to the fourth characteristic configuration of the present invention, since the overflow port is provided at the tip of the overflow pipe introduced into the inside of the oxidation tower, the concentrate of the solid matter that has floated upward is passed through the overflow pipe. It is possible to efficiently and quickly discharge from the overflow port provided at the tip.

According to a fifth characteristic configuration of the present invention, a transport pipe for transporting the concentrated liquid in the storage tank to the upper side of the oxidation tower is provided, and the concentrated liquid in the storage tank is transferred by a spraying device provided at the tip of the transport pipe. It exists in the place comprised so that it may spread in the said oxidation tower from upper direction.

According to the fifth characteristic configuration of the present invention, the transport pipe for transporting the concentrated liquid in the storage tank to the upper side of the oxidation tower is provided, and the concentrated liquid in the storage tank is oxidized by the spraying device provided at the tip of the transport pipe. Since it is configured to spray into the tower from above, the dispersion of the concentrated liquid ensures the amount of concentrated liquid that overflows from the oxidation tower into the storage tank, and at the same time, solids near the surface of the oxidation tower. A decrease in the concentration of can be prevented.
Therefore, it is possible to avoid the occurrence of a situation in which the solid concentrate is small and the discharge from each overflow port is not performed quickly, and the solid matter can always be separated and removed as desired.

A sixth characteristic configuration of the present invention is a desulfurization liquid in which the liquid absorbs hydrogen sulfide contained in the fuel gas and makes it a dissolved component, and the solid matter is sulfur that is precipitated on the surface of bubbles by oxidation of hydrogen sulfide. The sulfur is floated and concentrated from the desulfurization solution.

According to the sixth characteristic configuration of the present invention, the liquid is a desulfurization liquid that absorbs hydrogen sulfide contained in the fuel gas and makes it a dissolved component, and the solid is precipitated on the surface of the bubbles by oxidation of hydrogen sulfide. And since sulfur is floated and concentrated from a desulfurization liquid, the sulfur component in the hydrogen sulfide contained in fuel gas can be concentrated and removed.

An embodiment of a floating concentration facility according to the present invention will be described with reference to the drawings.
This levitation and concentrating facility makes hydrogen sulfide (H ₂ S) contact with an alkaline desulfurization liquid, and after hydrogen sulfide is dissolved in the alkaline desulfurization liquid as a dissolved component, the sulfidation in the desulfurization liquid is performed. Hydrogen is oxidized by air bubbles, solid sulfur (S) as a solid produced by the oxidation is precipitated on the surface of the bubbles, and floats upward with the bubbles together with the solid sulfur already contained in the desulfurization liquid. Used to separate and remove.
Therefore, as shown in FIG. 1 and FIG. 3, this levitation concentration facility oxidizes hydrogen sulfide in the desulfurization liquid with air, and floats and concentrates solid sulfur generated by the oxidation. A cylindrical storage tank 2 for storing a concentrated sulfur solution flowing out from the oxidation tower 1 is provided.

A supply pipe 3 for supplying a desulfurization solution containing hydrogen sulfide and air is connected to the oxidation tower 1 below, and a plurality of overflow ports 4, in this embodiment, four overflow ports 4 are provided on the upper peripheral wall. The first overflow pipes 5 are connected to the respective overflow ports 4, and the two first overflow pipes 5 are collected and connected to the second overflow pipe 6. Yes. Then, hydrogen sulfide in the desulfurization liquid supplied from the lower supply pipe 3 is oxidized with air, and solid sulfur generated by the oxidation is lifted and separated together with air bubbles, and the solid solid thus floated is separated. A sulfur concentrate is discharged from the overflow port 4 via the first and second overflow pipes 5 and 6 and supplied to the storage tank 2.
Furthermore, in the oxidation tower 1, in the plan view of the oxidation tower 1, a liquid suction port 7 that opens upward is disposed at the center of the oxidation tower 1 so as to be located below each overflow port 4. The non-concentrated liquid after removing the concentrated liquid is configured to be discharged from the oxidation tower 1 through the suction pipe 8 communicating with the liquid suction opening 7 from the liquid suction opening 7.

The two second overflow pipes 6 are respectively introduced through the peripheral wall of the storage tank 2 to the inside of the storage tank 2, and the concentrated liquid from the oxidation tower 1 is slanted at the tip of each second overflow pipe 6. There are provided outlets 9 for jetting downward, and these outlets 9 are arranged below the overflow port 4.
Therefore, the concentrated liquid discharged from the overflow port 4 through the first and second overflow pipes 5 and 6 is ejected vigorously from the respective outlets 9 due to the height difference, and flows as shown by arrows in FIG. Then, the concentrated liquid in the storage tank 2 is hydraulically stirred.
The lower part of the storage tank 2 and the upper part of the oxidation tower 1 are connected by the transport pipe 10, and the concentrated liquid in the storage tank 2 is transported to the upper part of the oxidation tower 1 by driving the pump 11 and is provided at the tip of the transport pipe 10. The concentrated liquid is sprayed into the oxidation tower 1 from above by the spraying device 12.

According to this levitation concentration equipment, a desulfurization liquid containing hydrogen sulfide is supplied into the oxidation tower 1 from below the oxidation tower 1 together with air through the supply pipe 3, and the hydrogen sulfide is oxidized by air bubbles, Solid sulfur deposited on the surface of the bubbles by the oxidation adheres to air bubbles and floats together with the bubbles, and a solid sulfur concentrate accumulates in the upper portion of the oxidation tower 1.
As shown in FIG. 2, the sulfur concentrate is discharged and removed from the overflow port 4 via the first overflow pipe 5, and the non-concentrated liquid after removing the concentrate is sucked from the liquid suction port 7. Although it is discharged through the pipe 8, the four overflow ports 4 are provided at substantially equal intervals on the peripheral wall of the oxidation tower 1, so that the concentrated sulfur solution crosses above the liquid suction port 7. Without being discharged from each overflow port 4. Therefore, there is little possibility that the sulfur concentrate is accidentally sucked into the liquid suction port 7, and the sulfur concentrate is reliably discharged from each overflow port 4 via the first overflow pipe 5.

Thereafter, the sulfur concentrate is vigorously stored through the first and second overflow pipes 5 and 6 obliquely downward from the jet outlets 9 provided at the ends of the two second overflow pipes 6. 2 is ejected. And since the two jet nozzles 9 are arrange | positioned in the position which mutually opposes with respect to the center of the storage tank 2 in planar view, the concentrated liquid in the storage tank 2 is hydraulically stirred by the concentrated liquid spouted out. Is done.
Accordingly, a special stirrer for mixing the concentrated liquid is not required, and even if a stirrer is provided, a relatively small stirrer is sufficient, and the initial cost and running cost can be reduced.

[Another embodiment]
Next, another embodiment will be described. However, in order to avoid redundant description, the components described in the previous embodiment and the components having the same action are denoted by the same reference numerals, and the description thereof is omitted. A configuration different from the embodiment will be described.

(1) In the previous embodiment, a configuration in which a plurality of overflow ports 4 are provided on the peripheral wall of the oxidation tower 1 and the first overflow pipes 5 are connected to the respective overflow ports 4 is shown in FIG. As shown, the four first overflow pipes 5 are introduced into the inside of the oxidation tower 1 and are located near the peripheral wall of the oxidation tower 1 so as to open upward at the tip of each overflow pipe 5. It can also be carried out by providing a mouth 4.
In short, the overflow port 4 may be disposed near the periphery of the oxidation tower 1, and the number of the overflow ports 4 is not limited to the four shown in the above embodiments. There may be a plurality of them, which can be appropriately selected according to the size and performance of the oxidation tower 1.

(2) In the previous embodiment, the example in which the two ejection ports 9 for ejecting the solid sulfur concentrate were arranged so as to face each other with respect to the center of the storage tank 2 was shown, but as shown in FIG. The concentrated liquid ejected from the ejection port 9 may be arranged eccentrically so as to generate a stirring swirl flow of the concentrated liquid swirling around the center of the storage tank 2 in a plan view of the storage tank 2.
In addition, an example is shown in which two first overflow pipes 5 are collectively connected to the second overflow pipe 6 and a jet outlet 9 is provided at the tip of the two second overflow pipes 6. The number of the two overflow pipes 6 is arbitrary, and can be appropriately selected according to the number of the first overflow pipes 5 and the like. Further, the second overflow pipe 6 is eliminated, and the first overflow pipe is eliminated. 5 can be directly introduced into the inside of the storage tank 2 and a jet outlet 9 can be provided at the tip of each first overflow pipe 5. In that case, the first overflow pipe 5 or the second overflow pipe 6 does not penetrate the peripheral side wall of the storage tank 2 as in the previous embodiment, but penetrates the ceiling wall of the storage tank 2 to enter the inside of the storage tank 2. It can also be introduced.

(3) In the previous embodiment, the example in which both the oxidation tower 1 and the storage tank 2 are formed in a cylindrical shape has been shown. However, the shape of the oxidation tower 1 and the storage tank 2 is not particularly limited. Various shapes such as a semi-cylindrical shape can be formed.
Moreover, although hydrogen sulfide was shown as an example of the dissolved component contained in the liquid, the dissolved component is not particularly limited to hydrogen sulfide. For example, a metal having solubility in a liquid such as iron. In this case, iron oxide is deposited on the surface of the bubbles to be concentrated and removed.

Schematic configuration diagram of floating concentration equipment Side view of the main part of the oxidation tower Schematic perspective view of floating concentration equipment Top view of storage tank Side view of essential parts of oxidation tower according to another embodiment Plan view of storage tank according to another embodiment Schematic configuration diagram of conventional floating concentration equipment Side view of main parts of prior art oxidation tower

DESCRIPTION OF SYMBOLS 1 Oxidation tower 2 Storage tank 4 Overflow port 5,6 Overflow pipe 7 Liquid suction port 9 Spout 10 Transport pipe 12 Spraying device

Claims (6)

The dissolved components in the liquid supplied from below are oxidized by air bubbles, and the dissolved components are precipitated as solids on the surface of the bubbles, and floated upward by the bubbles together with the solids already contained in the liquid. The solid concentrate that has floated is removed from the overflow port through the overflow pipe and removed, and the non-concentrated liquid after removing the concentrate is discharged from the liquid suction port. A flotation concentration facility comprising an oxidation tower for concentrating and removing solids in the liquid, and a storage tank having a structure in which the concentrated liquid flowing out from the oxidation tower through the overflow pipe is jetted into the interior. ,
A plurality of the overflow ports are provided and arranged near the periphery of the oxidation tower above the liquid suction port, and the overflow pipe is connected to each of the plurality of overflow ports,
A plurality of outlets for ejecting the concentrated liquid obliquely downward are provided at the ends of the plurality of overflow pipes introduced into the storage tank, and the plurality of outlets are below the overflow outlet. Floating concentration equipment located in The plurality of jet outlets are arranged eccentrically so as to generate a stirring swirl flow of the concentrate swirling around the center of the storage tank in a plan view of the storage tank by the concentrated liquid ejected from the jet outlets. Item 5. The floating concentration equipment according to item 1. The levitation concentration facility according to claim 1 or 2 , wherein the overflow port is provided on a peripheral wall of the oxidation tower . The levitation concentration facility according to claim 1 or 2, wherein the overflow port is provided at a tip of the overflow pipe introduced into the oxidation tower . A transport pipe for transporting the concentrated liquid in the storage tank to the upper side of the oxidation tower is provided, and the concentrated liquid in the storage tank is sprayed into the oxidation tower from above by a spraying device provided at the tip of the transport pipe. The levitation concentration equipment according to any one of claims 1 to 4 , wherein The liquid is a desulfurization liquid that absorbs hydrogen sulfide contained in the fuel gas and makes it a dissolved component, and the solid matter is sulfur that precipitates on the surface of bubbles due to oxidation of hydrogen sulfide, and the sulfur is levitated from the desulfurization liquid The levitation concentration equipment according to any one of claims 1 to 5 , which is concentrated.

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