JP2000279795A5 - - Google Patents

Description

[0005]
The supercritical water reaction apparatus 10 feeds a liquid to be treated containing an organic matter to the reactor 12 through the liquid pipe 22 as a supply system for supplying the reaction product to be used for the supercritical water reaction to the reactor 12. A treatment liquid pump 24 and an air compressor 28 for feeding air as an oxidant to the reactor 12 through an air feed pipe 26 are provided.
Furthermore, the supercritical water reaction apparatus 10 optionally uses an auxiliary fuel composed of a hydrophobic organic substance such as petroleum hydrocarbon oil as a thermal energy source necessary to maintain the supercritical water reaction in the reactor 12. An auxiliary fuel pipe 30 fed to the reactor 12 and an alkali agent feed pipe fed to the reactor 12 to neutralize the alkali agent for neutralizing chlorine etc. generated from the organic matter in the treatment liquid by the supercritical water reaction in the reactor 12 31 is made to merge with the liquid pipe 22 to be treated. In addition, when the water | moisture content in to-be-processed liquid runs short and a supercritical water reaction can not be maintained, a supplementary water pipe (not shown) for adding supplementary water to to-be-processed liquid pipe 22 may be connected.

[0006]
The liquid pipe 22 and the air feed pipe 26 are connected to the reactor 12 via a two-fluid nozzle 34.
The two-fluid nozzle 34, as shown in FIG. 7, is configured as a double pipe consisting of an inner pipe 36 and an outer pipe 38, and the diameter of the tip 38a of the outer tube 38 is reduced to make the annular opening area at the tip upstream. It becomes smaller rapidly than the annular area of The liquid pipe 22 to be treated is connected to the inner pipe 36 of the two-fluid nozzle 34, and the air feed pipe 26 is connected to an annular portion 39 composed of the inner pipe 36 and the outer pipe 38.

[0008]
A heat exchanger (not shown) for heat exchange between the treatment liquid and the treatment liquid to cool the treatment liquid and raising the temperature of the treatment liquid to recover heat is a treatment liquid pipe upstream of the cooler 16. 14 or a preheater for preheating the liquid to be treated may be provided on the liquid pipe 22 upstream of the reactor 12. Also, a supply water pipe of supercritical water may be connected to the liquid pipe 22 to be treated.
Furthermore, a subcritical water region may be provided in the lower part of the reactor 12, and a mechanism may be provided to precipitate inorganic salts generated in the reactor 12 in the subcritical water region and remove it.

[0009]
[Problems to be solved by the invention]
However, in a conventional supercritical water reactor using a vessel-type reactor as a reactor, a first liquid to be treated containing a water-soluble organic substance and a second substance containing a hydrophobic organic substance to be treated When the liquid to be treated is simultaneously fed to the reactor through the same liquid tube to be treated and the two-fluid nozzle, there is a problem that the reaction temperature of the reactor is not stable. For example, when the reaction temperature approaches the upper limit temperature at one time, the reaction temperature approaches the lower limit temperature at some time, the progress of the supercritical water reaction becomes extremely unstable, and the supercritical water reaction can be stably sustained. was difficult.
This is because, even when the first liquid to be treated and the auxiliary fuel mainly composed of the hydrophobic organic substance are simultaneously fed into the reactor through the same liquid to be treated pipe and the two-fluid nozzle, As in the case of the processing solution , there is a problem that the reaction temperature is unstable and fluctuates.

[0014]
In a preferred embodiment of the first invention, a three-fluid nozzle is provided at a reactant inlet of the reactor as a first feeding means, a second feeding means, and a feeding means of oxygen-containing gas,
A first annular portion comprising an outer pipe and a middle pipe as a flow path, wherein the three-fluid nozzle comprises an inner pipe, a middle pipe into which the inner pipe is inserted, and an outer pipe into which the inner pipe and the middle pipe are inserted; It is configured as a triple tube provided with a second annular portion consisting of a middle tube and an inner tube, and an inner tube, the diameter of the outer tube is reduced at the tip of the triple tube, and the area of the tip annular opening of the first annular portion but smaller than the area of the first ring-shaped portion of the upstream,
A gas inlet pipe provided as an oxygen-containing gas inlet means is provided in the first annular portion, and a first inlet pipe provided as a first inlet means is provided in the second annular portion. A second inlet pipe, which is provided as a means, is connected to the inner pipe, respectively.

[0015]
An oxygen-containing gas, a first liquid to be treated, and, at least one of the auxiliary fuel and the second liquid to be treated was fed separately to the three-fluid nozzle, by Atomaijin grayed I by the oxygen-containing gas, The second liquid to be treated and the auxiliary fuel can be uniformly dispersed in supercritical water or the first liquid to be dispersed in supercritical water.
In addition, a first delivery pipe for delivering the first liquid to be treated to the first annular portion in which the gas delivery pipe for delivering the oxygen-containing gas is composed of the outer pipe and the middle pipe, the middle tube and the inner pipe And a second feed pipe for feeding at least one of the second liquid to be treated and the auxiliary fuel is connected to the inner pipe. The thermal insulation effect of the oxygen-containing gas flowing through the inner pipe can prevent the charring of the second liquid to be treated or the auxiliary fuel flowing through the inner pipe.

[0019]
Supercritical water reactor 40, as shown in FIG. 1, mainly comprises water and a water-soluble organic material, the first to fed the first liquid to be treated does not contain a hydrophobic organic material substantially into the reactor 12 A first liquid pump 44 for feeding the first liquid to be treated to the reactor 12 through the feed pipe 42 and the first feed pipe 42, and an auxiliary fuel consisting of a hydrophobic organic substance in the reactor 12 And a second inlet pipe 46 for feeding the The alkali agent delivery pipe 31 is connected to the first delivery pipe 42.
The first inlet pipe 42, the second inlet pipe 46 and the air inlet pipe 26 are connected to the reactor 12 via a three-fluid nozzle 50.

[0020]
As shown in FIG. 2 , the three-fluid nozzle 50 used in the reactor of this embodiment has the inner pipe 52, the middle pipe 54 into which the inner pipe 52 is inserted, and the inner pipe 52 and the middle pipe 54. And a first annular portion 58 divided by the middle pipe 54 and the outer pipe 56, and a third pipe divided by the inner pipe 52 and the middle pipe 54. It has the two annular parts 60 and three flow paths of the inner pipe 52.
The outer tube 56 is reduced in diameter at the distal end portion 62 of the triplex tube, and the area of the annular opening at the distal end of the first annular portion 58 is smaller than the area of the upstream annular channel.
The first annular portion 58 is connected to the air inlet tube 26, the second annular portion 60 to the first inlet tube 42, and the inner tube 52 to the second inlet tube 46.

[0023]
In the present embodiment, the auxiliary fuel is fed to the reactor 12 as the hydrophobic organic substance, but the second liquid to be treated mainly containing the hydrophobic organic substance is added to the auxiliary fuel and the second feed pipe 46 It may be fed into the three-fluid nozzle 50, or instead of the auxiliary fuel, a second liquid to be treated mainly containing a hydrophobic organic substance may be fed.

[Description of the code]
DESCRIPTION OF SYMBOLS 10 Conventional supercritical water reaction apparatus 12 Vertical pressure-resistant closed type reactor 14 Treatment liquid pipe 16 Cooler 18 Pressure control valve 20 Gas-liquid separator 22 Liquid pipe 24 to-be-processed liquid pump 26 Air inlet pipe 28 Air compressor 30 the auxiliary fuel conduit 31 alkali agent fed tube
3 4 Two-fluid nozzle 36 Inner tube 38 Outer tube 38a Outer tube tip portion 39 Ring portion 40 Supercritical water reactor 42 of Embodiment 1 First feed tube 44 First treated liquid pump 46 Second Inlet tube 50 Three-fluid nozzle 52 Inner tube 54 Middle tube 56 Outer tube 58 First annular portion 60 Second annular portion 70 Three-fluid nozzle 72 used in the supercritical water reactor of Embodiment 2 Thermal insulation layer 80 Embodiment example Three supercritical water reactors 82, 84 two-fluid nozzles 86, 88 branch pipes

Claims (4)

A vertical reactor containing supercritical water, which contains mainly water and a water-soluble organic substance, and in addition to the first liquid to be treated which is substantially free of a hydrophobic organic substance, a second liquid containing mainly the hydrophobic organic substance The liquid to be treated and / or at least one of auxiliary fuel consisting mainly of hydrophobic organic matter are fed into the reactor, and an oxygen-containing gas as the oxidant is supplied to the reactor, and the organic matter in the presence of supercritical water A supercritical water reactor that carries out a supercritical water reaction of water and oxygen,
First feeding means for feeding the first liquid to be treated to the reactor;
What is claimed is: 1. A supercritical water reactor comprising: a second feed means for feeding at least one of a second liquid to be treated and an auxiliary fuel into a reactor. A three-fluid nozzle is provided at the reactant inlet of the reactor as a first feeding means, a second feeding means, and a feeding means of oxygen-containing gas,
A first annular portion comprising an outer pipe and a middle pipe as a flow path, wherein the three-fluid nozzle comprises an inner pipe, a middle pipe into which the inner pipe is inserted, and an outer pipe into which the inner pipe and the middle pipe are inserted; It is configured as a triple tube provided with a second annular portion consisting of a middle tube and an inner tube, and an inner tube, the diameter of the outer tube is reduced at the tip of the triple tube, and the area of the tip annular opening of the first annular portion but smaller than the area of the first ring-shaped portion of the upstream,
A gas inlet pipe provided as an oxygen-containing gas inlet means is provided in the first annular portion, and a first inlet pipe provided as a first inlet means is provided in the second annular portion. 2. The supercritical water reactor according to claim 1, wherein the second inlet pipe provided as a means is connected to the inner pipe. The supercritical water reactor according to claim 2, wherein a heat insulating layer is provided along the outer peripheral surface or the inner peripheral surface of the inner pipe. Provide two two-fluid nozzles at the reactant inlet of the reactor,
Each of the two two-fluid nozzles is a double pipe provided with an annular portion consisting of an outer pipe and an inner pipe as a flow path and an inner pipe by an inner pipe and an outer pipe into which the inner pipe is inserted. The diameter of the outer tube is reduced at the tip of the double tube, and the area of the tip annular opening of the annular portion is smaller than the area of the upstream annular portion,
The first inlet pipe provided as the first inlet means is provided to the inner pipe of one of the two fluid nozzles, and the second inlet pipe provided as the second inlet means is provided for the other two fluid nozzle. Two branched pipes branched from a gas feed pipe respectively connected to the inner pipe and provided as an oxygen-containing gas feeding means are respectively an annular portion of one two-fluid nozzle and the other two The supercritical water reactor according to claim 1, wherein the supercritical water reactor is connected to an annulus of the fluid nozzle.