JPH07195060A - Gas discharge treating device and solution decomposition treating device using the same - Google Patents

Abstract

PURPOSE:To efficiently separate and recover gases and liquid components after decom position of a soln. to be treated. CONSTITUTION:A reaction treating device 10 is provided with a hollow cylindrical supporting vessel 11 and a reaction tube 12 disposed to Penetrate its center line position. The reaction tube 12 consists of an alumina porous substance having a diameter of 30mmphi. The inside wall surface of the reaction tube 12 is provided with a catalyst layer 12a consisting of a baked layer of a manganese dioxide The outlet side of the reaction tube 12 is provided with a gas discharge device 20 consisting of a stationary tube part 21 and a moving tube part 22 inserted therein. This moving tube part 22 is liquid-tightly sealed with the stationary tube part by a sealing part 22b at one end and is made movable. The other end 22a is sealed. The peripheral wall near the sealing part of the moving tube part 22 is provided with a discharge pipe 22c. The hydrogen peroxide water supplied to the reaction tube 12 is separated by the catalyst layer to water and oxygen. The water is recovered outside from the tube wall of the reaction tube 22. The oxygen is recovered through the spacing between the stationary tube part 21 and the moving tube part 22 from a discharge pipe 22c to the outside.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas discharge processing apparatus and a solution decomposition processing apparatus using the same, and particularly to the chemical industry,
The present invention relates to a gas discharge treatment device suitable for use in the fields of food industry, medical care, and the like, and a solution decomposition treatment device using the same.

[0002]

2. Description of the Related Art Conventionally, as a gas discharge processing device of this type, water mixed with gas is controlled by adjusting the opening degree of a valve provided in the gas discharge pipe. Meanwhile, the gas was separated and discharged.
Further, as a conventional solution decomposition treatment apparatus using such a gas discharge treatment apparatus, a solution to be treated supply unit is provided inside a reaction tube made of a porous material having a catalyst layer provided on the inner wall thereof, for example, an aqueous solution of hydrogen peroxide. The treatment solution was supplied, and the hydrogen peroxide aqueous solution was decomposed by contact with the catalyst layer to separate oxygen and water. The water is discharged from the wall of the reaction tube to the outside, and the opening degree of the valve provided in the gas discharge tube connected to the reaction tube is adjusted to suppress the outflow of water from the gas discharge tube. Oxygen was separated and discharged.

[0003]

However, in the gas discharge processing apparatus and the solution decomposition processing apparatus described above, when the diameter of the gas discharge tube becomes small, a small valve is required, which makes the manufacture of the valve difficult, and thus the manufacturing cost. There is a problem that is high. In addition, since the flow path length of the valve is short, the effective opening of the gas component and the suppression of the outflow of the liquid component can be stably performed by appropriately adjusting the opening degree of the valve according to the supply pressure of the solution to be treated. Has the problem of being difficult. The present invention is intended to solve the above-described problems, and provides a gas discharge processing device that efficiently separates a gas in a liquid and discharges the gas, and a gas component generated by decomposition of a solution to be processed is a liquid. It is an object of the present invention to provide a solution decomposition treatment apparatus capable of efficiently separating and discharging a liquid component and discharging the liquid component smoothly from the wall of the reaction tube.

[0004]

In order to achieve the above-mentioned object, the structural feature of the invention according to claim 1 is that a fixed pipe portion having a liquid inlet at one end and a fixed pipe portion are provided. A fixed gap is provided on the outer peripheral side of the fixed pipe part from the other end, and it is fitted in a liquid-tight state so that it can move in the axial direction of the fixed pipe part, the other end side is sealed, and an exhaust pipe is provided on the side wall near the tip. And the movable tube portion provided with.

Further, the constitutional feature of the invention according to claim 2 is that a catalyst layer for decomposing the solution to be treated by contact with the solution to be treated and separating it into a gas component and a liquid component is provided on the inner wall surface or inside the wall. A reaction tube made of a porous material provided,
A solution supplying part to be treated provided at the inlet side of the reaction tube via a supply pipe, a fixed tube part connected to the outlet side of the reaction tube at one end, and a fixed tube part from the other end of the fixed tube part A movable pipe part having a fixed gap on the outer peripheral side and being fitted in a liquid-tight state at the tip end so as to be movable in the axial direction, the other end side is sealed, and an exhaust pipe is provided on the side wall near the tip end. And a gas discharge part comprising

[0006]

In the invention according to claim 1 configured as described above, the gas component in the liquid supplied from the fluid inlet moves to the fixed pipe portion of the gas discharge portion, and the viscous resistance is further increased. Is small, it smoothly passes through the gap between the fixed pipe part and the movable pipe part, and is discharged to the outside through the exhaust pipe and collected. Further, since the liquid component that has moved to the fixed pipe portion has a large viscous resistance, the passage of the gap between the fixed pipe portion and the movable pipe portion is suppressed. As a result, according to the invention of claim 1, the gas component separated from the liquid can be efficiently recovered from the gas discharge part. Also, by making the gas discharge part a double structure of a fixed pipe part and a movable pipe part,
The gap is easily formed, and the gas discharge processing device can be downsized. At this time, when the gap is large, the gas component can easily pass therethrough, and the gas discharge pressure is set low. Conversely, the smaller the gap is, the higher the gas discharge pressure is set. Therefore, the pressure can be controlled by adjusting the diameters of the fixed pipe portion and the movable pipe portion, but can also be adjusted by shifting the axial center of the pipe. Further, since the amount of insertion of the movable pipe portion into the fixed pipe portion can be easily adjusted, the processing capacity of the gas discharge processing device is brought into an appropriate state according to the injection pressure, flow rate, viscosity, etc. of the liquid supplied. Can be adjusted. That is, a high injection pressure can be maintained by increasing the insertion amount. It should be noted that the adjustment based on the insertion amount is easier than the above-described adjustment based on the pipe diameter or the like. Further, since the movement of the movable pipe portion is a linear movement, it can be easily automated by incorporating a device for controlling the movement amount of the movable pipe portion with respect to the factors such as the supply pressure of the liquid.

Further, in the invention according to claim 2 configured as described above, the solution to be treated supplied into the reaction tube is separated into a gas component and a liquid component by the catalyst layer, and the liquid component is made of a porous material. Permeate to the outside from the tube wall of the reaction tube. On the other hand, the gas component moves to the fixed pipe part of the gas discharge part, and since the viscous resistance is small, it smoothly passes through the gap between the fixed pipe part and the movable pipe part, and is discharged to the outside through the exhaust pipe. Collected. Further, since the liquid component that has moved to the fixed pipe portion has a large viscous resistance, the passage of the gap between the fixed pipe portion and the movable pipe portion is suppressed. Thereby, the discharge of the liquid component from the wall of the reaction tube is promoted.

As a result, according to the second aspect of the invention, of the components of the solution decomposed in the reaction tube, the gas component is separated from the gas discharge part, and the liquid component is separated from the tube wall of the reaction tube. Can be collected. Also, by making the gas discharge part a double structure of a fixed pipe part and a movable pipe part,
The length of the gas discharge part can be shortened, and the solution decomposition processing apparatus can be downsized. Since the miniaturization is facilitated, the solution decomposition treatment apparatus can be used in a plurality of stages, which can further reduce the concentration of the dissolved substance in the solution to be treated. Further, since the amount of insertion of the movable pipe portion into the fixed pipe portion can be easily adjusted, the solution decomposition treatment apparatus can be adjusted according to the discharge pressure of the pump, the flow rate of the liquid to be treated, the viscosity, the bubble point pressure of the reaction pipe, and the like. The processing capacity of can be adjusted to be in an appropriate state. Further, since the movement of the movable pipe portion is a linear movement, it can be easily automated by incorporating a device for controlling the movement amount of the movable pipe portion with respect to the factors such as the discharge pressure of the pump.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially broken sectional view schematically showing a liquid decomposition treatment system for liquid to be treated using a solution decomposition treatment apparatus. The solution decomposition treatment apparatus is provided with a reaction device 10. The reactor 10 has a length of 96 cm and a diameter of 8 cm.
It has a hollow cylindrical support container 11 made of glass of φ, and a cylindrical reaction tube 12 penetrating the center line position of the support container 11 and liquid-tightly fixed to both side surfaces by an adhesive 11a.
The reaction tube 12 has an inner diameter of 3 cm, an outer diameter of 5 cm, and a length of 100.
It is composed of an alumina porous body having an average pore diameter of 2 μm and a porosity of 41% in cml. On the inner wall surface of the reaction tube 12, a catalyst layer 12a made of a baked layer of manganese dioxide is provided. The catalyst layer 12a is formed to have a thickness of about 10 μm by applying a suspension of manganese dioxide to the inner surface of the reaction tube 12 and baking the suspension at 1150 ° C. for 30 minutes. A liquid discharge pipe 11a is provided at the bottom of the outer wall of the support container 11, and a liquid recovery container 41 is provided below the liquid discharge pipe 11a.

A gas discharge device 20 is provided on the outlet side (right end) of the reaction device 10. Gas discharge device 20
Has a fixed tube portion 21 and a movable tube portion 22. The fixed tube portion 21 has an inner diameter of 2 cm, an outer diameter of 2.3 cm, and a length of 50.
It is a cml stainless steel tube. The fixed tube portion 21 is slightly inserted into the right end portion of the reaction tube 12 and is liquid-tightly fixed by the adhesive 20a. The movable pipe portion 22 is inserted from the right end of the fixed pipe portion 21. The movable tube portion 22 has an inner diameter of 2.
It is a stainless steel tube having an outer diameter of 8 cm, an outer diameter of 3.1 cmφ, and a length of 35 cml. The right end portion 22a is sealed and the left end portion is provided with a flange-shaped seal portion 22b for mounting an O-ring. With this configuration, the fixed tube portion 2
A gap of about 2.5 mm is provided between 1 and the movable pipe portion 22, and the movable pipe portion 22 is formed by the seal portion 22b.
It is supported by the fixed tube portion 21 so as to be liquid-tight and movable. Also,
An exhaust pipe 22c directed downward is provided at a position near the left end of the movable pipe portion 22. The insertion length of the movable pipe portion 22 into the fixed pipe portion 21 is determined according to the discharge pressure of the pump, the flow rate of the liquid to be treated, the viscosity, the bubble point of the porous body, and the like, which will be described later. In addition, the exhaust pipe 22c of the movable pipe portion 22
Is connected to the gas recovery container 42 via the supply pipe 22d.

On the inlet side (left end portion) of the reaction device 10, a liquid supply device 30 to be treated is provided. The to-be-processed liquid supply apparatus 30 has a supply pump 31 and a connecting member 32 connected to the other end of a supply pipe 31a connected to the discharge side thereof. The connecting member 32 is an L-shaped tube made of stainless steel, and is fitted to the outer peripheral side of the left end portion of the reaction tube 12,
It is liquid-tightly fixed by the adhesive 32a. A supply pipe 31b is connected to the suction side of the supply pump 31, and the supply pipe 31b extends into the liquid tank 43 to be treated.

The operation of the embodiment configured as described above will be described. Upon starting driving, the supply pump 31 sucks the hydrogen peroxide solution having a concentration of 1 wt% contained in the liquid tank to be treated, and the average discharge pressure is 1 kg / cm ² and the average flow rate is 10 m.
It is supplied into the reaction vessel 12 at a rate of 1 / min. Hydrogen peroxide is used as the catalyst layer 12a applied to the inner wall of the reaction vessel 12.
Is decomposed by the action of to oxygen and water. Water permeates the porous wall of the reaction tube 12 and falls into the support container 11, and is further stored in the liquid discharge container 41 through the liquid discharge pipe 11a. The oxygen gas moves into the fixed pipe portion 21 of the gas exhaust device 20, and further enters the gap between the fixed pipe portion 21 and the movable pipe portion 22. Since the viscous resistance of oxygen gas is small, the oxygen gas smoothly permeates through the gap and is recovered in the gas recovery container 42 through the exhaust pipe 22c and the supply pipe 22d. Further, the water mixed in the oxygen gas in the fixed pipe portion 21 has a large viscous resistance, and the fixed pipe portion 2
1 significantly decreases in the gap between the movable tube portion 22 and the movable tube portion 22, and therefore water permeation through the porous wall of the reaction tube 12 is promoted. As a result, the hydrogen peroxide concentration of the recovered water could be reduced to 0.01 wt%.

As described above, in the solution decomposition treatment apparatus according to the above-mentioned embodiment, the gas discharge device 20 has a double pipe structure in which the movable pipe portion 22 is inserted into the outer peripheral side of the fixed pipe portion 21, and the gap between the two is formed. It was possible to make it easier for oxygen gas to pass through and to make it difficult for water to pass through. As a result, it was possible to separate the components generated by the decomposition of the hydrogen peroxide solution in the reaction tube into oxygen and water, respectively, to discharge the oxygen from the gas discharging device, and to stably recover the water from the wall of the reaction tube. Further, since the gas discharging device has a double-pipe structure, the length of the gas discharging device can be shortened, and the solution decomposition treatment device can be downsized. Since the miniaturization is facilitated, the number of stages of the solution decomposition treatment device can be increased, and as a result, the concentration of the dissolved substance can be further reduced. Further, since the gas exhaust device can easily adjust the amount of insertion of the movable pipe portion into the fixed pipe portion,
Depending on the discharge pressure of the pump, the flow rate of the liquid to be treated, the viscosity, the bubble point of the reaction tube, etc., the decomposition treatment capacity of the liquid to be treated of the apparatus can be freely adjusted to be in an appropriate state. Further, since the movement of the movable pipe portion is a linear movement, it is possible to automatically control the adjustment of the movement amount with respect to the fluctuation factors such as the discharge pressure of the pump.

In the above embodiment, the reaction device is connected to the inlet side of the gas discharge device to form a solution decomposition treatment device, but it can also be used as a gas discharge device alone, and a liquid containing any gas can be used. It may be used by connecting it to a supply source for supplying.

In this embodiment, the hydrogen peroxide solution was used as the liquid to be treated, but other solutions containing ozone, carbon dioxide, etc. can be used. In this case, the catalyst layer in the reaction tube is used. Should be changed accordingly.
Further, as the reaction tube, in addition to alumina, porous ceramics, porous metal, etc. can be used.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a solution decomposition processing apparatus according to an embodiment of the present invention.

[Explanation of symbols]

10; Reactor, 11; Support container, 12; Reaction tube, 12
a; catalyst layer, 20; gas discharge device, 21; fixed tube part, 2
2; movable pipe part, 22b; seal part, 22c; exhaust pipe, 3
0: liquid to be treated supply device, 31; supply pump, 32; connecting members, 31a, 31b; supply pipe.

Claims (2)

[Claims] 1. A fixed pipe portion having a liquid inlet at one end, and a fixed gap between the other end of the fixed pipe portion and the outer peripheral side of the fixed pipe portion so as to be movable in the axial direction thereof and at the tip. A gas discharge processing device, which is fitted in a liquid-tight state, is sealed at the other end, and is provided with a movable pipe section provided with an exhaust pipe on a side wall near the tip. 2. A reaction tube made of a porous material provided on an inner wall surface or inside the wall thereof, wherein a catalyst layer for decomposing the solution to be treated by contact with the solution to be treated and separating it into a gas component and a liquid component is provided. A treated solution supply unit provided via a supply pipe on the inlet side of the reaction tube, and a fixed pipe section connected to the outlet side of the reaction tube at one end,
A fixed gap is provided from the other end of the fixed pipe portion to the outer peripheral side of the fixed pipe portion, and the tip end is fitted in a liquid-tight state so as to be movable in the axial direction, the other end side is sealed, and A solution decomposition treatment device, characterized in that a gas discharge part having a movable pipe part provided with an exhaust pipe is provided on a side wall in the vicinity thereof.