JP6661982B2 - Fluid treatment equipment - Google Patents

Description

  The present invention relates to a fluid treatment device.

2. Description of the Related Art Conventionally, as a method for decomposing and rendering harmless wastewater (fluid to be treated) containing organic matter, oxidation treatment under high-temperature and high-pressure water conditions represented by supercritical water oxidation has been known.
This type of oxidation treatment is carried out by introducing a fluid to be treated and an oxidizing agent into a reaction vessel. However, when the fluid to be treated is simply introduced into the reaction vessel, the droplet size after introduction is large, and the fluid to be treated is Since the water drops to the lower part of the reaction tank before evaporating, there arises a problem that the treatment cannot be performed sufficiently.

Patent Literature 1 uses a nozzle having a double pipe structure including an inner pipe for discharging a treatment target fluid and an outer pipe for jetting an oxidizing agent and supercritical water, and processes the jetting speed of the oxidizing agent and the supercritical water. A configuration is described in which the discharge speed of the target fluid is set to be higher than that of the target fluid to make the target fluid to be processed into fine particles.
A cylindrical spacer is arranged between the inner tube and the outer tube, and the inner tube and the outer tube are arranged concentrically.
Patent Literature 2 discloses a method in which a projecting portion is formed on an outer peripheral surface of an inner tube or an inner peripheral surface of an outer tube so as to project in a radial direction at intervals in a circumferential direction. Are described concentrically.

In this type of fluid treatment apparatus, the nozzle portion is exposed to a high temperature state in the reaction tank, so that the nozzle portion is blocked by the charring (carbonization) of the organic matter in the fluid to be treated and the solid matter contained in the treatment fluid. May be caused.
In general, the fluid to be treated is pressurized to a high pressure state by a pump and transferred to the reaction tank.If the closed state of the nozzle is left unchecked, it will be over-pressurized and damage to the nozzle and other parts will occur. This may occur.

  The present invention has been made in view of such a current situation, and provides a fluid processing apparatus that can prevent damage caused by the clogging in a nozzle unit that atomizes a processing target fluid even if the nozzle unit is atomized, Its main purpose.

In order to achieve the above object, a fluid treatment apparatus of the present invention decomposes an organic substance in a mixed fluid of a fluid to be treated and an oxidizing agent, and treats the fluid to be treated, and the fluid to be treated. A nozzle portion for forming fine particles in the reaction vessel, a treatment fluid supply pipe for supplying the treatment fluid to the nozzle portion, an oxidant supply pipe for supplying the oxidant to the nozzle portion, A processing target fluid discharge member that is connected to a fluid supply pipe and discharges the processing target fluid at the nozzle portion, and an oxidant ejection member that is connected to the oxidant supply tube and that sprays the oxidant at the nozzle portion. Wherein the target fluid discharge member and the oxidant ejecting member are provided so that one located on the outside surrounds the other located on the inside, and the target fluid discharge member and the oxidant ejecting member out The members who are located in serial outward extension mechanism operating in the flow direction of the oxidant so as to release the pressure is provided when the member located outer becomes constant pressure or more.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a fluid processing apparatus capable of preventing damage caused by a blockage at a nozzle unit for atomizing a processing target fluid beforehand.

1 is a schematic configuration diagram of a fluid processing device according to a first embodiment of the present invention. FIG. 3 is a sectional view of a main part showing a configuration of a nozzle unit. FIGS. 7A and 7B are diagrams illustrating an operation of an extension mechanism, in which FIG. 7A illustrates a state in which a discharge port of a processing target fluid ejection member is closed by a solid or the like, and FIG. It is. FIGS. 7A and 7B are diagrams illustrating an operation of an extension mechanism according to a second embodiment, in which FIG. 7A illustrates a state in which a discharge port of a processing target fluid ejection member is closed by a solid or the like, and FIG. It is a figure showing the state where it was done. 3A and 3B are diagrams illustrating a radial positioning portion and a longitudinal positioning portion in each embodiment, wherein FIG. 4A is an enlarged cross-sectional view taken along line CC of FIG. 2, and FIG. It is sectional drawing. It is a principal part perspective view which shows the structure of the radial direction positioning part in each embodiment. It is an expanded sectional view in CC line of FIG. 2 which shows the modification of a radial direction positioning part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a first embodiment.
First, an overview of the overall configuration of a fluid processing apparatus (processing system) according to the present embodiment will be described with reference to FIG.
The fluid processing apparatus 1 includes a processing target fluid supply unit 2, an oxidant supply unit 3, a reaction tank 4, a heat exchange unit 5, a solid separation unit 6, a gas-liquid separation unit 7, and control as a control unit. Device 8. Hereinafter, each configuration will be specifically described.

The processing target fluid supply unit 2 has a raw water tank 9, and a processing target fluid W containing an organic substance is stored in the raw water tank 9 in a state where the concentration of the organic substance is adjusted. The processing target fluid W is pumped toward the reaction tank 4 by the raw water supply pump 10.
In the process of pumping the fluid to be treated, the pressure is detected by the raw water pressure gauge 11 and the flow rate is detected by the raw water flow meter 12. The flow rate of the processing target fluid W can be adjusted by the raw water supply pump 10.
A raw water inlet valve 13 is provided on the downstream side of the raw water flow meter 12.

The processing target fluid that has passed through the raw water inlet valve 13 can be preheated by the raw water preheater 14. A raw water preheater outlet thermometer 15 is provided downstream of the raw water preheater 14.
The raw water tank 9 is provided with a stirrer 16. The fluid W to be treated is agitated by the agitator 16 so that the components of the fluid to be treated are made uniform.

The oxidizing agent supply section 3 has an oxidizing agent pump 17 including a compressor as a pressurizing unit for pressurizing the oxidizing agent. The oxidizing agent pumping pump 17 sends out the air A taken in as the oxidizing agent toward the reaction tank 4 while compressing the air A to a pressure approximately equal to the pressure of the fluid to be treated.
While the air is being pumped, the pressure is detected by the oxidant pressure gauge 18 and the flow rate is detected by the oxidant flow meter 19. An oxidant inlet valve 20 is provided downstream of the oxidant flow meter 19. The flow rate of the oxidizing agent is adjusted by the oxidizing agent flow controller 46.

The air that has passed through the oxidant inlet valve 20 can be preheated by the oxidant preheater 21. An oxidant preheater outlet thermometer 22 is provided downstream of the oxidant preheater 21.
The treatment target fluid that has passed through the raw water preheater 14 and the air that has passed through the oxidant preheater 21 are separately introduced into the reaction tank 4 and merged in the reaction tank.
The pumping pressure of the processing target fluid is adjusted to the reaction pressure. Since a pressure loss occurs at the inlet of the reaction tank for air, the pressure for pumping air is set higher than in the reaction tank.

The amount of air pumped by the driving of the oxidant pump 17 is determined based on the stoichiometric amount of oxygen required to completely oxidize the organic matter in the processing target fluid W.
More specifically, based on the organic matter concentration, nitrogen concentration, phosphorus concentration, and the like in the treatment target fluid W, such as total organic carbon (TOC), total inorganic nitrogen (TN), and total phosphorus (TP) of the treatment target fluid, The amount of oxygen required for complete oxidation is calculated.
Specifically, it is set so that an oxygen amount of 1.0 to 3.0 times the amount of oxygen necessary for complete oxidation of organic substances is introduced.
As the oxidizing agent, in addition to air, any one of oxygen and ozone, or a mixture of two or more thereof can be used.

The pressure applied to the mixed fluid in the reaction tank may be in the range of 0.5 to 30 MPa (preferably 5 to 15 MPa).
The pressure in the reaction tank is adjusted by an outlet valve 37 downstream of the solid separation section 6. When the pressure in the reaction tank becomes higher than the threshold, the outlet valve 37 automatically opens the valve to discharge the mixed fluid in the reaction tank to the outside, thereby maintaining the pressure in the reaction tank near the threshold.
The temperature of the mixed fluid in the reaction tank can be, for example, 100 to 700 ° C (preferably 200 to 550 ° C).
The temperature of the mixed fluid in the reaction tank rises due to heating by the raw water preheater 14 and the oxidizing agent preheater 21 and heat generated by oxidative decomposition of organic substances.

When the processing target fluid W contains an organic substance at a high concentration, the mixed fluid may be heated to a desired temperature only by a large amount of heat generated when a large amount of the organic substance is oxidized and decomposed. In this case, the heating by the raw water preheater 14 and the oxidizing agent preheater 21 is performed only when the apparatus is started up, and the heating by the raw water preheating device 14 and the oxidizing agent preheater 21 is stopped after the oxidative decomposition is started. Thus, the supply of electric energy can be reduced.
The heating temperature is adjusted by adjusting the outputs of the raw water preheater 14 and the oxidizing agent preheater 21.

The reaction tank 4 has a cylindrical shape having an inlet 23 at one end and an outlet 24 at the other end, and mixes the fluid to be treated and the oxidant under a heated and pressurized state. Is decomposed by an oxidation reaction to treat the fluid to be treated. The reaction tank 4 is provided with a space for maintaining a high temperature and a high pressure to secure a reaction time.
The inlet 23 is provided with a nozzle 25 for atomizing the fluid to be treated. A fluid supply pipe 26 to be treated and an oxidant supply pipe 27 are connected to the nozzle section 25.

The mixed fluid moves in the reaction tank from the top to the bottom along the longitudinal direction. The mixed fluid that has moved downward in the reaction tank is in a state where organic substances are almost completely oxidized and decomposed, and is discharged from the outlet 24 as a treated fluid.
The reaction tank 4 has a double cylinder structure including an outer cylinder and an inner cylinder that is housed in close contact with the inside of the outer cylinder.
Depending on the type of the fluid to be treated, hydrochloric acid derived from a chloro group of an organic chloride and sulfuric acid derived from a sulfonyl group of an amino acid or the like are generated, and the inner wall of the inner cylinder may be exposed to a strong acid. For this reason, a cylinder made of titanium having excellent corrosion resistance is adopted as the inner cylinder.

The inner cylinder may be made of Ta, Au, Pt, Ir, Rh, or Pd instead of titanium. Alternatively, an alloy containing at least one of Ti, Ta, Au, Pt, Ir, Rh, and Pd may be used.
On the other hand, the outer cylinder is a cylinder made of a metal material having excellent strength such as stainless steel (SUS304, SUS316), Inconel 625, or the like.
If the thermal expansion coefficients of the outer cylinder and the inner cylinder are significantly different, provide a gap between the outer cylinder and the inner cylinder to maintain the same pressure as the inside of the inner cylinder. A structure called a balance type may be used.

A catalyst member 28 is provided in the reaction tank 4. In particular, when the purpose of treatment is complete decomposition of organic substances under the condition of superheated steam, it is effective to provide a catalyst.
If a catalyst is provided, oxidative decomposition can be promoted and complete treatment can be performed even if undecomposed organic substances and ammonia nitrogen remain.

  At least the surface of the catalyst layer of the catalyst member 28 is made of a catalyst substance that promotes oxidative decomposition of organic substances. Examples of such a catalyst substance include Ru, Pd, Rh, Pt, Au, Ir, Os, Fe, Cu, Zn, Ni, Co, Ce, Ti, and Mn, or a compound containing at least one of them. Can be exemplified.

Examples of the material of the base material of the catalyst member 28 include an alloy containing at least one of Fe, Ni, Cr, and Mo. Furthermore, any one of Ti, Au, Pt, Rh, Pd, Zr, and V, an alloy containing any one, ceramic, quartz glass, and the like can be exemplified.
From among these, the material may be selected in consideration of cost, processability, ease of coating with the selected catalyst substance, mechanical strength, heat resistance under reaction conditions, and corrosion resistance.

The treated fluid that has flowed out of the reaction tank 4 flows into the heat exchanger 29 of the heat exchange unit 5. The heat exchange unit 5 is provided with a heat medium tank 30, and the heat medium tank 30 stores a heat exchange fluid TF. The heat exchange fluid TF is supplied to the heat exchanger 29 by the heat exchange pump 31.
Immediately downstream of the heat exchanger 29, a heat exchanger outlet thermometer 32 for detecting the temperature of the treated fluid is provided, and the detection result by the heat exchanger outlet thermometer 32 is maintained within a predetermined numerical range. Next, the drive of the heat exchange pump 31 is controlled.
Downstream of the heat exchanger outlet thermometer 32, a heat exchanger outlet pressure gauge 33 is provided. The heat exchange fluid TF heated by passing through the heat exchanger 29 is sent to a heat energy utilization facility through a pipe.

The solid separation section 6 has a first separation system 34 and a second separation system 35. The first separation system 34 includes a first branch valve, a first separation filter, a first drain valve, and the like.
Similarly, the second separation system 35 includes a second branch valve, a second separation filter, a second drain valve, and the like.
The oxide as a solid deposited in the reaction tank is captured by the first separation filter or the second separation filter.

The first separation system 34 and the second separation system 35 are used alternately. That is, when the first separation system 34 is used, each valve of the second separation system 35 is closed, and when the second separation system 35 is used, each valve of the first separation system 34 is closed. Can be
When the first separation filter or the second separation filter is clogged, the pressure measured by the outlet pressure gauge 36 changes. Based on this, the first separation filter or the second separation filter is washed or replaced.

The gas-liquid separator 7 has an outlet valve 37, a gas-liquid separator 38, and the like. The processed fluid that has passed through the solid separation section 6 is finally separated by a gas-liquid separator 38 into treated water 39 as a treatment liquid and gas (gas) 40. Treated water 39 is stored in a treated water tank 41.
The composition of the gas 40 separated by the gas-liquid separator 38 is detected by a gas chromatograph (GC) 42. When an undecomposed substance is detected by the gas chromatograph, an alarm is issued by the control device 8 which has received an output signal from the gas chromatograph.

The TOC concentration of the treated water 39 separated by the gas-liquid separator 38 is detected by the TOC analyzer 43. When the TOC analyzer detects a total organic carbon having a concentration exceeding the threshold value, an alarm is issued by the control device 8 which has received the output signal from the TOC analyzer.
If treated properly, the treated water is almost completely oxidatively decomposed even with very low molecular organic matter that cannot be removed by biological treatment with activated sludge, so it contains almost no suspended solids and organic matter. Absent.

Therefore, even as it is, it can be reused as industrial water depending on the use. Further, if a filtration treatment using an ultrafiltration membrane is performed, it can be diverted to an LSI cleaning liquid or the like.
The gas separated by the gas-liquid separator 38 is mainly composed of carbon dioxide, nitrogen gas, and oxygen.

The control device 8 is a microcomputer including an I / O interface, a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like.
The control device 8 receives detection information from various instruments related to the flow rate, pressure, and temperature, operation state information from equipment such as a pump, and the like. The control device 8 controls a pump, a preheater, a flow control valve, an on-off valve and the like based on the information.
The control device 8 is further provided with a touch panel as a device for operation and display, enabling display of states such as temperature, pressure, and flow rate, display of a warning when an abnormality has occurred and details of a failure, and input and change of set values and the like. Has become.

When an abnormality occurs, the interlock is controlled by driving the pump, turning off the heater, or closing the inlet valve.
The contents of the abnormality include failure of the device, clogging in the flow path, leakage, and the like. The abnormal pressure and the abnormal temperature are determined by the control device 8 and can be monitored by the touch panel.
In FIG. 1, reference numeral 44 denotes a steam thermometer for detecting the temperature of steam emitted from the heat exchanger 29 toward the heat energy utilization facility, and reference numeral 45 denotes a reaction as reaction temperature detection means for detecting a reaction temperature in the reaction tank 4. Shows a bath thermometer.

The configuration of the nozzle unit 25 will be described based on FIG.
The nozzle unit 25 includes a processing target fluid discharge member 50 connected to the processing target fluid supply pipe 26, and an oxidizing agent jetting member 51 connected to the oxidizing agent supply pipe 27 and jetting high-pressure compressed air. .
The processing target fluid discharge member 50 is provided so as to surround the outside of the oxidant ejection member 51 over the entire circumferential direction, and the nozzle portion 25 has a double pipe structure. In the present embodiment, the processing target fluid is a member located on the outside, and the oxidizing agent ejection member 51 is a member located on the inside.

The processing target fluid discharge member 50 is provided on the inner surface side of the upper lid 4a so as to be detachably provided on the inner surface side of the upper lid 4a, and a cylindrical fixed cylindrical portion 52 inserted and fixed in the inlet 23 formed in the upper lid 4a as the upper surface of the reaction tank 4. A ring-shaped joint member 53 is provided, and an inner cylindrical portion 54 provided integrally with the joint member 53 via an extension mechanism 55.
The extension mechanism 55 in the present embodiment has a bellows structure made of stainless steel extending in the discharge direction of the processing target fluid or the oxidant ejection direction. The material of the extension mechanism 55 is not limited to this, and any material having excellent pressure resistance and corrosion resistance may be used. For example, titanium may be used.

A horizontally extending introduction pipe 56 is formed integrally with the fixed cylindrical section 52, and the processing target fluid supply pipe 26 is connected to the introduction pipe 56 via a joint 57 outside the nozzle section 25.
The tubular oxidant spraying member 51 penetrates the upper surface of the fixed tubular portion 52 and is inserted into the fixed tubular portion 52, and is connected to the oxidant supply pipe 27 via a joint portion 58 outside the nozzle portion 25. .
The inner cylinder portion 54 includes a cylindrical portion 54a having a constant inner diameter, a conical portion 54b having an inner diameter gradually decreasing downward, and a plurality of radial positioning members provided at intervals in the circumferential direction in the cylindrical portion 54a. And a portion 59.
At the center of the lower end of the conical portion 54b, a circular discharge port 54c for discharging the processing target fluid is formed.
The discharge port 54c itself is circular, but since the tip (lower end) of the oxidizing agent injection member 51 is located at the center of the discharge port 54c, the discharge port 54c is substantially annular.

  As the joints 57 and 58, a welded joint or a swage lock as a caulking means can be adopted. However, the joint method is not limited to these.

A radial positioning portion 59 for positioning between the two members in the radial direction is for positioning the oxidizing agent ejecting member 51 concentrically with respect to the processing target fluid ejection member 50.
The extension mechanism 55 has a structure that can freely move in the flow direction of the fluid and in the direction perpendicular to the flow direction of the fluid by the flexibility of the bellows, so that the positioning of the radial positioning portion 59 is not hindered.
At a portion corresponding to the radial positioning portion 59 of the oxidant spraying member 51, a longitudinal positioning portion 60 having an inclined surface shape for positioning in the longitudinal direction is provided. The longitudinal direction positioning portion 60 regulates the amount of projection δ of the tip of the oxidant ejecting member 51 in the ejection direction from the discharge port 54c.
Details of the radial positioning portion 59 and the longitudinal positioning portion 60 will be described later.

As described above, in this type of fluid processing apparatus, since the nozzle portion 25 is exposed to a high temperature state, as shown in FIG. There is a case where the discharge port 54c is closed by the solid matter 63 or the like.
When the discharge port 54c is closed, since the processing target fluid W is pressurized by the raw water supply pump 10, the internal pressure of the processing target fluid discharge member 50, which is the member located on the outside, increases, and the inner cylindrical portion 54 There is a concern that damage to the inside of the reaction tank 4 of the fluid discharge member 50 to be treated including the above and the like, and damage to the upstream side of the inside may be caused.

An extension mechanism 55 is provided to solve this concern.
When the discharge port 54c is closed and the internal pressure rises to a certain pressure or higher, as shown in FIG. 3B, the bellows-shaped extending mechanism 55 extends so as to release the pressure. Preferably, when the pressure becomes equal to or higher than the design pressure of the apparatus, the extension mechanism 55 operates, and the inner cylinder portion 54 moves downward in the flow direction of the oxidant.
As a result, the lower end of the oxidizing agent ejecting member 51 is separated from the discharge port 54c, and the processing target fluid discharging member 50 is removed from the gap formed between the solid material 63 attached to the discharging port 54c and the oxidizing agent ejecting member 51. Is introduced into the reaction tank, and the internal pressure of the fluid discharge member 50 decreases. Thus, a pressure increase above a certain pressure in the processing target fluid discharge member 50 can be prevented, and breakage due to overpressurization can be prevented.

When the internal pressure of the processing target fluid discharge member 50 drops, the extension mechanism 55 contracts, and the state in which the discharge port 54c is closed is formed again. When the pressure exceeds a certain pressure, the extension mechanism 55 extends again to release the pressure. . This operation is repeated.
When the pressure is released, the amount of protrusion δ of the tip of the oxidizing agent injection member 51 in the injection direction from the discharge port 54c is not maintained at a constant amount. This is reflected in the indicated value of the reaction tank thermometer 45 for detecting the reaction temperature. For this reason, when the control device 8 determines that the pressure release operation by the extension mechanism 55 has been performed, for example, a warning that “the nozzle portion is blocked” is issued to the operator via the touch panel or the like, and the operator is notified. Encourage maintenance to be performed.

In response to this warning, a maintenance operation for removing the adhesion of the solid matter or the like at the discharge port 54c is performed.
In this case, as described above, the extension mechanism 55, the inner cylindrical portion 54, and the radial positioning portion 59 are provided integrally with the joint member 53 that is detachably attached to the upper lid 4a of the reaction tank 4. It is only necessary to remove the joint member 53 from the reaction tank 4, and maintenance work becomes easy.
The setting of the constant pressure is such that the pressure at which the extension mechanism 55 operates is actually grasped in advance, and can be distinguished from pressure fluctuation due to other factors.

  The extension mechanism 55 is designed to perform an extension operation when the pressure exceeds a set pressure (constant pressure). For example, when there is a proportional relationship between the internal pressure of the processing target fluid discharge member 50 and the extension of the extension mechanism 55, the proportional constant k can be set as follows.

Here, P is the design pressure of the fluid processing apparatus, Di is the inner diameter of the processed fluid discharging member 50, i.e. the inner diameter of the inner cylindrical portion 54, L ₁ is lowered amount of processed fluid discharging member 50, i.e., the extension mechanism 55 Indicates the amount of elongation.
For the smooth extension operation of the extension mechanism 55, it is desirable that the extension mechanism 55 extends along the oxidant spraying member 51. Therefore, the length L ₂ of the protruding portion of the oxidizer injection member 51 when the extension mechanism 55 is complete extension and L _2> 0.
That is, since the extension mechanism 55 moves together with the inner cylinder 54 guided by the oxidizing agent ejecting member 51 via the radial positioning part 59, the radial positioning part 59 for moving the inner cylinder 54 stably is provided. It is desirable that the contact state between the oxidizing agent injection member 51 and the oxidizing agent injection member 51 remain when the extension mechanism 55 completes the extension.

  The processing target fluid ejection member 50 including the radial positioning portion 59 and the oxidizing agent ejection member 51 include Ti, Au, Pt, Rh, or Pd, or Fe, Ni, Ti, Ag, Au, Pt, Ir, Rh, And alloys containing at least one of Pd and Fe, Ni, Ti, Ag, Au, Pt, Ir, Rh, and Pd that have been surface-treated with at least one metal. Thereby, the corrosion resistance can be improved.

A second embodiment will be described with reference to FIG.
The same parts as those of the above-described embodiment are denoted by the same reference numerals, and the description of the configuration and the function already described is omitted, and only the main part will be described.
The extension mechanism 65 in the present embodiment has a heavy pipe structure (here, a double pipe structure) that slides and extends in the discharge direction of the processing target fluid or the oxidant ejection direction.
That is, the extension mechanism 65 has a double pipe structure including an outer pipe 66 fixed or formed integrally with the joint member 53 and an inner pipe 67 fixed or formed integrally with the inner tubular portion 54. I have.

The inner peripheral surface of the outer tube 66 and the outer peripheral surface of the inner tube 67 are slidable in an airtight state, and the friction coefficient is set so that sliding occurs at a certain pressure or higher.
Under a configuration in which a helical groove formed on the inner peripheral surface of the outer tube 66 is fitted with a convex portion formed on the outer peripheral surface of the inner tube 67, the inner tube 67 rotates when a predetermined pressure or more is reached. You may make it move while moving.
In the present embodiment, the outer tube 66 is provided on the joint member 53 side, and the inner tube 67 is provided on the inner cylinder portion 54 side.

FIG. 4A shows a state in which the discharge port 54c is closed, as in FIG. 3A. When the discharge port 54c is closed and the internal pressure rises and exceeds a certain pressure, as shown in FIG. 4B, the inner pipe 67 of the extension mechanism 65 slides and extends to release the pressure.
The extension mechanism 65 of the present embodiment is different from that of the bellows structure, and does not return to the original state even if the pressure in the fluid discharge member 50 to be processed drops once it is extended.
Since the amount of protrusion δ of the tip of the oxidant ejecting member 51 from the discharge port 54c in the ejection direction in the ejection direction needs to be maintained at a constant amount, it is desirable that the process be continued even if the pressure releasing operation by the extension mechanism 65 is performed. Absent.
When the controller 8 determines that the pressure releasing operation has been performed by the extension mechanism 65, the controller 8 issues a warning, for example, that "the nozzle portion is blocked" through the above touch panel or the like, and performs maintenance for the operator. Prompt.

  In each of the above embodiments, the configuration of the nozzle portion 25 is a so-called inside air type double pipe structure in which the oxidizing agent injection member 51 is located inside, but a so-called outside air type 2 tube structure in which the oxidizing agent injection member 51 is located outside. A double tube structure may be used.

The radial positioning portion 59 and the longitudinal positioning portion 60 common to the above embodiments will be described in detail.
As shown in FIGS. 5 and 6, the radial positioning portion 59 includes four key grooves 54 d formed at equal intervals in the circumferential direction on the inner surface of the cylindrical portion 54 a of the inner cylindrical portion 54. A support portion 61 is fitted at the base end by an interference fit or an intermediate fit, and is fixed in a cantilever state.
As shown in FIG. 6, an inclined surface 61 a that guides the insertion of the oxidizing agent injection member 51 toward the center of the radial positioning portion 59 is formed at the free end of each support piece 61.

The oxidizing agent ejecting member 51 includes an introduction portion 51a having a large flow passage cross-sectional area and an ejection portion 51b having a smaller flow passage cross-sectional area than the introduction portion 51a. It has become.
A longitudinal positioning portion 60 is formed as an inclined surface at a boundary between the introduction portion 51a and the injection portion 51b, and the longitudinal positioning portion 60 comes into contact with the inclined surface 61a of the support piece 61 group, whereby positioning in the longitudinal direction is performed. Done.
As shown in FIG. 5A, the ejection portion 51b of the oxidant ejection member 51 is inserted into the space 62 surrounded by the tip of each support piece 61 while being guided by the inclined surface 61a. The space 62 is also the inner diameter of the radial positioning portion 59.
The longitudinal positioning portion 60 has a configuration in which the outer diameter of the oxidizing agent injection member 51 is larger than the inner diameter of the radial positioning portion 59.

  In the present embodiment, the longitudinal direction positioning portion 60 is configured by changing the outer diameter of the oxidizing agent ejecting member 51, but is simply located on the outer surface of the oxidizing agent ejecting member 51 at a position larger than the inner diameter of the radial positioning portion 59. May be formed.

Deformation and displacement occur at the time of connection at the joints 57 and 58, and even if this is reflected in the displacement of the relative positional relationship between the processing target fluid ejection member 50 and the oxidizing agent ejection member 51 at the nozzle portion 25, By inserting and contacting the oxidizing agent ejecting member 51 at the center of the direction positioning portion 59, the positioning in the radial direction and the positioning in the longitudinal direction are performed simultaneously.
That is, by inserting the ejection portion 51b of the oxidant ejection member 51 into the space 62 of the radial positioning portion 59, the oxidant ejection member 51 is positioned in the radial direction with respect to the processing target fluid ejection member 50, and the ejection port 54c is formed. The injection port 51c is located at the center of.

As a result, as shown in FIG. 5B, the discharge port 54c has a uniform annular shape with a uniform width W over the entire circumferential direction, thereby enabling unbiased jetting (particulation).
Assuming that the outer diameter of the ejection section 51b is D1 and the outer diameter of the discharge port 54c is D2, the width W of the annular discharge port 54c is W = (D2−D1) / 2.
The width W of the discharge port 54c is determined by the amounts of the processing target fluid and the oxidizing agent, and is desirably 5 mm or less.

In addition, the longitudinal positioning portion 60 abuts on the inclined surface 61a of the support piece 61, whereby the longitudinal positioning is performed, and an appropriate projection amount δ of the oxidizing agent ejection member 51 is secured. The protrusion amount δ is determined by the amounts of the processing target fluid and the oxidizing agent, and is desirably 5 mm or less.
In the case where the oxidizing agent ejecting members 51 having different diameters of the ejecting portions 51b are used in accordance with the difference in characteristics such as the viscosity of the fluid to be treated, it is possible to cope by using the support pieces 61 having different lengths.
For example, the joint member 53 may be configured so that the position in the vertical direction can be adjusted by, for example, the amount of rotation of the screw, and fine adjustment of the protrusion amount δ may be performed.

Air as an oxidizing agent is compressed (pressurized) by the oxidizing agent pump 17 and is injected from the injection unit 51b in a state where the molecular density is high and the kinetic energy is increased. Thereby, the processing target fluid discharged from the discharge port 54c is atomized into an appropriate particle diameter. At the same time, the air and the fluid to be treated are mixed outside the nozzle unit 25.
The air is ejected from the ejection port 51c in a state where the flow velocity increases due to the configuration in which the inner diameter gradually decreases in the ejection direction.

In the present embodiment, four support pieces 61 are provided for positioning. However, as shown in FIG. 7, three support pieces 61 may be used for positioning.
As described above, by positioning the oxidizing agent ejection member 51 while supporting it with the plurality of narrow supporting pieces 61, the flow of the processing target fluid is prevented as much as possible in the processing target fluid ejection member 50 without obstructing the flow of the processing target fluid. The positioning between the oxidizing agent injection portion 51c and the discharge port 54c of the processing target fluid, which greatly affects the generation of fine particles, can be easily performed with high accuracy.

As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to such specific embodiments, and unless otherwise specified in the above description, the present invention described in the claims is not limited thereto. Various modifications and changes are possible within the scope of the gist.
The effects described in the embodiments of the present invention merely exemplify the most preferable effects resulting from the present invention, and the effects according to the present invention are limited to those described in the embodiments of the present invention. is not.

4 Reaction tank 25 Nozzle part 26 Fluid supply pipe to be treated 27 Oxidant supply pipe 50 Fluid discharge member to be treated 51 Oxidant ejecting member 55, 65 Extension mechanism 59 Radial positioning part 60 Longitudinal positioning part A Air as oxidant W Fluid to be treated

JP-A-10-137774 Japanese Patent No. 3703695

Claims (6)

A reaction tank for decomposing organic substances in the mixed fluid of the treatment target fluid and the oxidant, and treating the treatment target fluid,
A nozzle unit for atomizing the fluid to be treated in the reaction tank,
A target fluid supply pipe that supplies the target fluid to the nozzle unit,
An oxidant supply pipe for supplying the oxidant to the nozzle portion,
A processing target fluid discharge member that is connected to the processing target fluid supply pipe and discharges the processing target fluid at the nozzle unit.
An oxidant ejecting member connected to the oxidant supply pipe and ejecting the oxidant at the nozzle portion;
With
The treatment target fluid ejection member and the oxidizing agent ejection member are provided so that any one located outside surrounds the other located inside.
The process is member towards located at the outside of the subject fluid ejection member and the oxidant ejector member, the oxidizing agent so as to release the pressure when the member located outer becomes constant pressure or more A fluid treatment device provided with an extension mechanism that operates in the flow direction . The fluid treatment device according to claim 1,
A fluid processing apparatus, wherein the extending mechanism has a bellows structure extending in a discharge direction of the processing target fluid or in a jet direction of the oxidizing agent . The fluid treatment device according to claim 1,
A fluid processing apparatus, wherein the extension mechanism has a double-pipe structure that extends by sliding in the discharge direction of the processing target fluid or the oxidizing agent ejection direction. The fluid treatment device according to any one of claims 1 to 3,
The outer member is provided with a radial positioning portion that performs radial positioning between the two members, and the inner member is provided with a longitudinal positioning member that performs longitudinal positioning between the two members. A fluid treatment device provided with a part. The fluid treatment device according to any one of claims 1 to 4,
A fluid processing apparatus, wherein a joint member is detachably provided inside the upper surface of the reaction tank, and the extension mechanism and the member located on the outside are integrally fixed to the joint member. The fluid treatment apparatus according to any one of claims 1 to 5,
A fluid treatment apparatus wherein the treatment target fluid is introduced into the reaction tank in a state where the fluid is heated and pressurized.

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