JP2002096080A - Supercritical water reaction apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supercritical water reaction apparatus which makes treatment stability higher when organic matters, more preferably PCBs are subjected to supercritical water oxidation treatment. SOLUTION: The supercritical water reaction apparatus 10 has a post- treatment device 36 of supercritical water reaction on the downstream of a gas-liquid separator 20. The post-treatment device 36 has an adsorbing means 42 and 44 which adsorb the PCBs in the gaseous component and liquid component separated by the gas-liquid separator 20, organic solvent supplying means 46 and 48 which supply organic solvents to the adsorbers, a waste organic solvent feeding means 50 and 52 which feed the waste organic solvents flowing out of the adsorbers into a reactor 12 and a sequence controller 54 for the adsorbers. The sequence controller performs sequence control by controlling the automatic stop valves around the adsorbers 42 and 44 in such a manner that either of the respective adsorbers 42 and 44 is maintained at the adsorption process step and the other is maintained at the desorption process step during the operation of the supercritical water reaction apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supercritical water reactor for treating an organic substance by a supercritical water reaction, and more particularly, to a residual concentration of an organic substance in a treatment liquid even when an unexpected change in process conditions occurs. The present invention relates to a supercritical water reactor provided with a post-treatment means for ensuring that the concentration is below the allowable concentration.

[0002]

2. Description of the Related Art With increasing awareness of environmental issues,
Utilizing supercritical water reaction with high oxidative decomposition ability of organic matter,
Attempts to decompose and detoxify environmental pollutants have attracted attention. That is, harmful hardly decomposable organic substances, such as PCB (polychlorinated biphenyl), dioxin, and organic chlorinated compounds, which were difficult to decompose in the prior art by supercritical water reaction utilizing high reactivity of supercritical water. This is an attempt to decompose a solvent or the like and convert it into harmless products such as carbon dioxide, nitrogen, water, and inorganic salts.

[0003] A supercritical water reactor is a device that decomposes organic substances by using high reactivity of supercritical water. For example, harmless carbon dioxide and water are decomposed by decomposing hard-to-decompose harmful organic substances. In order to decompose hard-to-decompose high-molecular compounds and convert them into useful low-molecular compounds,
Its practical application is being actively studied. Supercritical water refers to water that is in a supercritical state, that is, water that is in a state beyond the critical point of water, and specifically, at a temperature of 374.1 ° C. or more and a pressure of 22.04 MPa or more. A state of water. Supercritical water has a high ability to dissolve organic substances and can completely dissolve non-polar substances, which are abundant in organic compounds, but has a very low ability to dissolve inorganic substances such as metals and salts. Further, the supercritical water can be mixed with a gas such as oxygen or nitrogen at an arbitrary ratio to form a single phase.

Here, the basic configuration of the supercritical water reactor will be described with reference to FIG. FIG. 2 is a flow sheet showing the configuration of a conventional supercritical water reactor. The conventional supercritical water reactor 60 is a device for treating a liquid to be treated containing an organic chlorine compound by a supercritical water reaction in the presence of supercritical water. As shown in FIG. A vertical pressure-resistant closed reactor 62 is provided as a reactor to be used.
A cooling liquid 66 for cooling the processing liquid, a pressure control valve 68 for controlling the pressure in the reactor 62, and a gas-liquid separation of the processing liquid into a gas and a liquid. The gas-liquid separator 70 is provided. In addition, a tubular tubular reactor may be used instead of the vertical reaction vessel.

[0005] The supercritical water reactor 60 has a supply system for supplying a reactant to be used for the supercritical water reaction to a reactor 62.
A processing liquid pump 74 and an air compressor 76 are provided. A processing liquid containing an organic chlorine compound is fed into the reactor 62 via a processing liquid pipe 78, and is connected to the processing liquid pipe 78. Air as an oxidant is fed into the reactor 62 together with the liquid to be treated through the air inlet pipe 80. Further, in order to maintain the supercritical water reaction, make-up water is added to the liquid tube 78 through the make-up water tube 86.

A heat exchanger (not shown) for exchanging heat between the liquid to be processed and the processing liquid to cool the processing liquid and raise the temperature of the liquid to be processed to recover heat is provided upstream of the cooler 66. A preheating device for preheating the liquid to be processed is provided in the reactor
May be provided in the liquid pipe 78 to be processed, which is located upstream of the pipe. Further, a neutralizing and quenching unit 82 is added to the processing liquid tube 64 immediately after it exits from the reactor 62.
And an alkaline aqueous solution flows into the processing liquid from the injection pipe 84 to neutralize and rapidly cool. Further, the reactor 62
In some cases, a subcritical water region is provided at the bottom of the reactor, and a mechanism is provided to settle and remove inorganic salts generated in the reactor 62 in the subcritical water region.

[0007]

When treating harmful organic chlorine compounds such as PCBs, the important processing conditions to be observed are that the concentration of the residual organic chlorine compound contained in the processing solution must be an allowable concentration. It is as follows. For example, in the case of PCB, the permissible concentration is 0.003 mg / l, and it is strictly prohibited to flow out a processing solution having a PCB concentration exceeding 0.003 mg / l even to a temporary outflow. I have. That is, when the PCB concentration is 0.003
Processing solutions exceeding mg / l require reprocessing. Less than,
A description will be given of an example of PCB processing.

[0008] After treating the PCB, the concentration of the PCB in the treatment solution is usually determined by the solvent extraction-GC-
It is measured by the ECD method. In the measurement by the solvent extraction-GC-ECD method, it takes 2 to 3 days to measure the PCB concentration of one processing solution sample. Therefore, the treatment liquid cannot be discharged to the outside until the PCB concentration is measured and the measurement result is confirmed to be 0.003 mg / l or less. For example, the treatment liquid flowing out of the supercritical water reactor Are sequentially stored in a plurality of tanks, and after the PCB concentration of the stored processing solution is confirmed to be 0.003 mg / l or less, it is necessary to take measures such as discharging. However, this requires a plurality of tanks for storing the processing liquid, and thus requires a large installation area.

By the way, a PC using a supercritical water reactor
In the treatment of B, by maintaining the supercritical water reaction under predetermined conditions, the PCB concentration in the processing liquid flowing out of the supercritical water reactor is surely reduced to 0.003 mg / l or less. Various measures have been taken by various control means and safety means so that the supercritical water reaction can be maintained under the following conditions. However, it is self-evident that in the real world of processing, it is almost impossible to be flawless, on a laboratory scale, commercial or industrial scale. Therefore, in the PCB processing, “the PCB concentration in the processing liquid is absolutely required to be 0.003 mg / l or less”, the preconditions of the processing, for example, the properties of the liquid to be processed, are greatly reduced based on the above recognition. Even if it fluctuates, the PCB concentration in the processing solution is surely 0.003 mg /
There is a strong demand for efforts to further increase the processing stability of the supercritical water reactor so as to be 1 or less.

Accordingly, an object of the present invention is to provide a supercritical water reactor having a higher processing stability when harmful organic substances such as PCBs are subjected to supercritical water oxidation treatment.

[0011]

In order to ensure that the concentration of harmful organic substances does not exceed the allowable value, the present inventor has proposed a means for reliably removing organic substances remaining in the processing solution of the supercritical water reactor. It was considered safer to provide it as a post-processing device. As a result of experiments on various removal methods, it has been found that removing residual organic substances from the treatment liquid by an adsorption action using an adsorbent such as activated carbon is a more reliable removal method.

Further, a method of treating an adsorbent having adsorbed an organic substance was also studied. In general, when the adsorption activity of an adsorbent such as activated carbon decreases due to the adsorption of organic substances, a regeneration treatment such as a high-temperature heating treatment is performed to recover the adsorption activity, and the adsorbent is reused or incinerated. When the adsorbent adsorbs an organic chlorine compound such as PCB at the time of incineration of the adsorbent, harmful substances such as dioxin may be generated by the incineration. Therefore, conventionally, PCB
The adsorbent which has adsorbed the organic chlorine compound such as is strictly stored in a warehouse or the like. However, this is only an accumulation and not a complete solution. Therefore, the inventor of the present invention conceived of desorbing an organochlorine compound adsorbed on an adsorbent and performing a supercritical water reaction with the desorbed organochlorine compound together with a liquid to be treated, and repeated experiments to achieve the present invention. Invented.

In order to achieve the above object, based on the above-mentioned findings, a supercritical water reactor according to the present invention includes a reactor containing supercritical water, and converts a liquid to be treated containing an organic substance into a reactor. A supercritical water reactor that is fed into supercritical water in the reactor, oxidizes and decomposes organic substances by an oxidizing agent, and discharges a processing liquid having an organic substance content of a predetermined value or less. An adsorbing means having an adsorbent layer provided on the processing liquid pipe to be discharged and adsorbing residual organic matter in the processing liquid in contact with the processing liquid, and allowing the organic solvent to flow into the adsorbent layer while passing through the adsorbent layer An organic solvent supply means for desorbing an organic substance adsorbed on the adsorbent and flowing out of the adsorbent layer as a waste organic solvent containing the organic substance, and a waste organic solvent mixed with the liquid to be treated and sent to the reactor. Solvent feeding means. To have. In the present invention, the post-processing device can be provided in the processing liquid pipe upstream of the gas-liquid separator, for example, in the processing liquid pipe between the cooler and the gas-liquid separator.

When a post-treatment device is provided downstream of the gas-liquid separator, the supercritical water reactor according to the present invention includes a reactor for containing supercritical water, and reacts a liquid to be treated containing organic substances. A supercritical water reactor that is fed into supercritical water in a vessel, oxidizes and decomposes organic substances with an oxidizing agent, and discharges a processing liquid having a content of organic substances equal to or lower than a predetermined value. A liquid outlet and a gas outlet are provided respectively for the liquid component and the gas component of the processing liquid separated by the gas-liquid separator connected to the pipe, and are in contact with the liquid component or the gas component of the processing liquid. An adsorption means having an adsorbent layer for adsorbing residual organic substances, and an organic solvent flowing into the adsorbent layer and, while passing through the adsorbent layer, desorbing the organic substances adsorbed on the adsorbent and adsorbing as a waste organic solvent containing organic substances Organic solution flowing out of the agent layer Supply means, the waste organic solvents by mixing the liquid to be treated is characterized by comprising a waste organic solvent infeed means causes fed into a reactor.

The adsorbent used in the present invention varies depending on the type of organic matter. For example, in the case of PCB, activated carbon,
Urethane adsorbents are preferred. Also, PC from adsorbent
Examples of the organic solvent for desorbing B include lower alcohols such as methanol and ethanol, saturated hydrocarbon compounds such as normal hexane, organic chlorine compounds such as acetonitrile, trichlene and perchrene, and carbon sulfide.

In a preferred embodiment of the present invention, the adsorbing means has an organic solvent supplying means and a waste organic solvent feeding means, respectively, and the organic substance is adsorbed from the adsorbing step and the adsorbent for adsorbing the organic substance in the treatment liquid. It is configured as a plurality of adsorbers provided in parallel with the processing liquid pipe so that the desorption step for desorption is performed independently, and at least one adsorber is provided during operation of the supercritical water reactor.
A control device is provided for performing sequence control such that the individual adsorbers are maintained in the adsorption step, and at least one of the other adsorbers is maintained in the desorption step of desorbing organic substances from the adsorbent.

Further, an analyzer is provided for analyzing the concentration of at least one of the remaining organic substances in the processing solution, the liquid component of the processing solution, and the gas component of the processing solution, and the waste liquid used in the analyzer is used as a waste organic solvent. It can also be made to feed into a reactor by feeding means. The analyzer contains the official solvent extraction -G
In addition to the C-ECD method, there is a method to which a solid phase extraction method disclosed in Japanese Patent Application Laid-Open No. H11-344377 is applied.
In the solid-phase extraction method, a treatment liquid is passed through a column packed with a solid-phase adsorbent, then washed to remove substances other than the target substance, and finally the target substance is eluted for analysis. Is the way. By using this solid phase extraction method for analyzing the PCB concentration of the processing solution, the analysis time can be significantly reduced, for example, to 1 to 2 hours, as compared with the official solvent extraction method.

[0018]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Embodiment This embodiment is an example of an embodiment of a supercritical water reactor according to the present invention, and FIG. 1 is a flow sheet showing a configuration of a supercritical water reactor of this embodiment. The supercritical water reactor 10 of the present embodiment is an apparatus for treating a liquid to be treated mainly containing PCB by a supercritical water reaction in the presence of supercritical water, and as shown in FIG. As a reactor for carrying out the reaction, a vertical pressure-resistant closed type reactor 12 is provided, and a processing solution pipe 14 through which the processing solution flows out from the reactor 12, a cooling device 16 for sequentially cooling the processing solution, and a cooling device 16 in the reactor 12. The apparatus includes a pressure control valve 18 for controlling the pressure, and a gas-liquid separator 20 for gas-liquid separation of the processing liquid into a gas component and a liquid component.

The supercritical water reactor 10 has a supply system for supplying a reactant to be used for the supercritical water reaction to the reactor 12.
A processing target liquid pump 24 whose discharge amount can be adjusted by inverter control or stroke control, and an air compressor 28 are provided. The processing target liquid is mixed with PCB and water through a processing target liquid pipe 22 to form an emulsion. The liquid is fed into the reactor 12,
In addition, air as an oxidant is fed into the reactor 12 together with the liquid to be treated through the air inlet pipe 26 and the liquid pipe 22 to be treated.
Although not shown, there is an emulsion forming means for mixing and decomposing the PCB and water in the PCB storage tank to form an emulsion, and an emulsion tank for storing the emulsion formed by the means is provided. One end of the tube 22 communicates. Further, the supercritical water reactor 10 is provided with a neutralization quenching unit 30 in the processing liquid pipe 14 immediately after exiting from the reactor 12, and an alkaline aqueous solution is injected into the processing liquid from the injection pipe 31 to bring the processing liquid to a temperature of 450 ° C. Less than,
Preferably, it is neutralized and rapidly cooled to 350 ° C. or less.

The supercritical water reactor 10 is provided with a temperature controller 32 for controlling the reaction temperature in the reactor 12 to, for example, 550 ° C. by adjusting the flow rate of the liquid to be treated. The temperature control device 32 has a thermometer 34 for measuring the temperature inside the reactor 12, and adjusts the discharge amount of the liquid to be treated pump 24 based on the temperature of the thermometer 34 to adjust the outlet temperature of the liquid to be treated. Then, the reaction temperature is controlled to a set temperature in a range of 550 ° C. or more and 650 ° C. or less. Supercritical water reactor 10
Then, by setting the reaction temperature in the range of 550 ° C. or more and 650 ° C. or less, which is higher than the conventional reaction temperature, the liquid to be treated is treated so that the PCB concentration in the treatment liquid becomes 0.003 mg / l or less. Can be.

Further, the supercritical water reactor 10 has a post-treatment device 36 for the supercritical water reaction downstream of the gas-liquid separator 20. The post-treatment device 36 includes an adsorption unit that adsorbs the PCB in the gas component and the liquid component separated by the gas-liquid separator 20, an organic solvent supply unit that supplies an organic solvent to the adsorber,
It has a waste organic solvent feeding means for feeding the waste organic solvent flowing out of the adsorber to the reactor 12, and a sequence control device. The adsorbing means includes two adsorbers 42A and 42B and two adsorbers 44A connected in parallel to the gas outlet pipe 38 and the liquid outlet pipe 40 connected to the upper and lower parts of the gas-liquid separator 20, respectively. , B.

In each of the adsorbers 42A, B and the adsorbers 44A, B, organic solvent pipes 46A, B and 48A, B for supplying an organic solvent are provided as organic solvent supply means, respectively.
Further, as a waste organic solvent feeding means, a waste organic solvent pipe 50A,
B and 52A, B are connected. Waste organic solvent pipe 50
A and B and 52A and B are combined into a waste organic solvent pipe 50, and the PCB storage tank 5 before producing water and an emulsion.
7 is connected.

The inlet and outlet pipes of the adsorbers 42A and 42B, the inlet and outlet pipes of the adsorbers 44A and 44B, and the organic solvent pipe 46
A, B and 48A, B and waste organic solvent tubes 50A, B
And 52A and 52B respectively include the sequence controller 5
An automatic on-off valve that opens and closes according to 4 is provided. The sequence control device 54 includes an inlet pipe and an outlet pipe of the adsorbers 42A, B, the organic solvent pipes 46A, B, and a waste organic solvent pipe 50.
By controlling the automatic opening / closing valves provided in A and B, during operation of the supercritical water reactor 10, one of the adsorbers 42A and B is maintained in the adsorption step, and the other is maintained in the desorption step. Sequence control. In addition, the sequence control device 5
4 controls the automatic on / off valves provided on the inlet pipe and the outlet pipe of the adsorbers 44A, B, the organic solvent pipes 48A, B and the waste organic solvent pipes 52A, B, during the operation of the supercritical water reactor 10, One of the adsorbers 44A, B is maintained in the adsorption step,
Sequence control is performed so that the other is maintained in the desorption process.

Further, upstream and downstream of the adsorbers 42 and 44, analyzers 56A to 56D by the above-described solid phase extraction method are provided for measuring the PCB concentration. Although not shown, the waste liquid used in the analyzers 56A to 56D is connected to the PCB storage tank using the waste organic solvent pipe 50 or another pipe.

In this embodiment, the analyzers 56A and 56A are P
The amount of adsorbent capable of adsorbing the estimated maximum PCB amount contained in the gas component and the liquid component of the processing liquid flowing through the adsorbers 42 and 44 during the time required for analyzing the CB concentration, for example, two hours, is set in the adsorber 42 , 44. Thus, even if the PCB concentration of the processing solution flowing out of the reactor 12 exceeds 0.003 mg / l due to unpredictable condition fluctuation, the PCBs are adsorbed by the adsorbers 42 and 44.
Is completely adsorbed and removed, so that the PCB concentration in the gas component and the liquid component flowing out does not exceed 0.003 mg / l. The analyzer 56B, D
Is for monitoring the PCB concentration of the final effluent gas or effluent.

Furthermore, the waste organic solvent containing PCB desorbed from the adsorbent layers of the adsorbers 42 and 44 is reprocessed in the reactor 12 via the PCB storage tank, so that the PCB flows out together with the adsorbent to the outside. It does not happen. Also, since the PCB in the adsorbent has been desorbed by the organic solvent,
The adsorbent does not contain PCB. Therefore, even when the capacity of the adsorbent decreases, the adsorbent can be incinerated.

In this embodiment, the post-processing device 36 is provided downstream of the gas-liquid separator 20. However, the present invention is not limited to this. For example, the cooling device 16 and the pressure control valve 18 are provided upstream of the gas-liquid separator 20.
Can also be provided between. In this case, there is no need for the adsorber 42 for adsorbing the PCB in the gas component and the related equipment related to the organic solvent, and a means for supplying the organic solvent to the adsorbers 44A and 44B and the adsorbers 44A and 44B. Since only means for feeding the waste organic solvent flowing out of the reactors 44A and 44B to the reactor 12 is provided, the number of adsorbers can be reduced and the cost can be reduced.

It is not always necessary to perform a sequence control by providing a plurality of adsorbers in parallel as in the present embodiment, and it is possible to increase the adsorbing capacity of the adsorber by making it sufficiently large. For example, only one adsorber may be provided by setting an adsorption capacity capable of adsorbing the estimated maximum PCB amount contained in the processing solution flowing during the required analysis time of the analyzer 56. That is, the concentration of PCB in the processing solution is always 0.003 mg / l or less, which is extremely low. Therefore, as long as the adsorber has a sufficiently large adsorption capacity, adsorption during the operation of the supercritical water reactor is performed. This is because the activity of the agent does not decrease.

[0029]

According to the present invention, an adsorbing means having an adsorbent layer for adsorbing residual organic matter in the processing liquid by contacting the processing liquid, an organic solvent flowing into the adsorbent layer, and passing through the adsorbent layer After that, a supercritical water reactor is provided with an organic solvent supply means for flowing out as a waste organic solvent containing organic matter, and a waste organic solvent supply means for mixing the waste organic solvent with the liquid to be treated and feeding the mixture into the reactor. Prepare for. In the present invention, since the organic substance can be completely adsorbed and removed by the adsorbing means, the safety can be further improved when, for example, PCB or the like is subjected to supercritical hydroxylation treatment.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing a configuration of a supercritical water reactor of an embodiment.

FIG. 2 is a flow sheet showing a configuration of a conventional supercritical water reactor.

[Explanation of symbols]

 Reference Signs List 10 Supercritical water reactor of embodiment example 12 Reactor 14 Treatment liquid pipe 16 Cooler 18 Pressure control valve 20 Gas-liquid separator 22 Liquid pipe to be treated 24 Liquid pump to be treated 26 Air inlet pipe 28 Air compressor 30 Medium Warm quenching unit 31 Injection pipe 32 Temperature controller 34 Thermometer 36 Post-processing device 38 Gas outlet pipe 40 Liquid outlet pipe 42, 44 Adsorber 46, 48 Organic solvent pipe 50, 52 Waste organic solvent pipe 54 Sequence controller 56 Analyzer 57 PCB storage tank 60 Conventional supercritical water reactor 62 Reactor 64 Processing liquid pipe 66 Cooler 68 Pressure control valve 70 Gas-liquid separator 74 Liquid pump to be processed 76 Air compressor 78 Liquid pipe to be processed 80 Air inlet pipe 82 Neutralizing and quenching section 84 Injection pipe 86 Make-up water pipe

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/58 C07B 37/06 C07B 35/06 B01D 53/34 ZAB 37/06 134E (72) Inventor Yasuko 1-8-2 Shinsuna 1-chome, Koto-ku, Tokyo F-term (reference) in Organo Corporation 4D002 AA21 AC10 BA04 BA05 CA07 CA13 DA41 DA57 EA01 EA04 EA07 GA03 GB06 HA01 4D024 AA10 AB11 BA02 BA17 CA01 DA01 DA03 DA04 DA05 DA07 DA08 DB20 DB23 DB28 4D038 AA08 AB14 BA02 BA04 BA06 BB01 BB05 BB06 BB13 BB16 4D050 AA12 AB19 BB01 BB20 BC01 BC02 BD02 BD03 BD06 BD08 CA06 CA13 CA20 4H006 AA05 AC13 AC24 BE30

Claims (5)

[Claims] 1. A reactor containing supercritical water is provided, a liquid to be treated containing an organic substance is fed into supercritical water in the reactor, and the organic substance is oxidized and decomposed by an oxidizing agent. A supercritical water reactor that discharges a processing liquid of a predetermined value or less, and is provided as a post-processing device in a processing liquid pipe through which the processing liquid flows, and contacts with the processing liquid to adsorb remaining organic substances in the processing liquid. An adsorption means having an adsorbent layer; an organic solvent flowing into the adsorbent layer, passing through the adsorbent layer, desorbing organic substances adsorbed on the adsorbent, and flowing out of the adsorbent layer as a waste organic solvent containing organic substances. A supercritical water reactor, comprising: an organic solvent supply means; and a waste organic solvent feeding means for mixing a waste organic solvent with a liquid to be treated and feeding the mixed liquid into a reactor. 2. The adsorption means has an organic solvent supply means and a waste organic solvent supply means, respectively, and independently performs an adsorption step for adsorbing organic substances in a treatment liquid and a desorption step for desorbing organic substances from an adsorbent. The supercritical water reactor is configured so that at least one adsorber is maintained in the adsorption step during operation of the supercritical water reactor, 2. The supercritical water reactor according to claim 1, further comprising a control device for performing sequence control so that at least one of them is maintained in a desorption step of desorbing organic substances from the adsorbent. 3. A reactor containing supercritical water is provided, and a liquid to be treated containing organic substances is fed into supercritical water in the reactor, and the organic substances are oxidized and decomposed by an oxidizing agent. A supercritical water reactor that discharges a processing liquid of a predetermined value or less, and as a post-processing device, discharges the liquid and gas components of the processing liquid separated by a gas-liquid separator connected to the processing liquid pipe. Adsorbing means having an adsorbent layer provided on the liquid outflow pipe and the gas outflow pipe to be in contact with the liquid component or the gas component of the processing liquid to adsorb the remaining organic matter, and the organic solvent is introduced into the adsorbent layer to adsorb An organic solvent supply means for allowing the organic matter adsorbed on the adsorbent to pass through the agent layer and desorbing the organic matter from the adsorbent layer as a waste organic solvent containing the organic matter; Waste organic solvent feeding means A supercritical water reactor comprising: 4. The adsorption means has an organic solvent supply means and a waste organic solvent supply means, respectively, and independently performs an adsorption step for adsorbing organic substances in the treatment liquid and a desorption step for desorbing organic substances from the adsorbent. As a plurality of adsorbers provided in parallel to the liquid outlet pipe and the gas outlet pipe, respectively, at least one adsorber is maintained in the adsorption step during operation of the supercritical water reactor, 4. The supercritical water reactor according to claim 3, wherein at least one of the other adsorbers is provided with a controller for performing sequence control so as to be maintained in a desorption step of desorbing organic substances from the adsorbent. . 5. An analyzer for analyzing the concentration of at least one of remaining organic substances in a processing solution, a liquid component of the processing solution, and a gas component of the processing solution, wherein a waste liquid used in the analyzer is used as a waste organic solvent. The supercritical water reactor according to any one of claims 1 to 4, wherein the reactor is fed into the reactor by feeding means.