JP2019098242A - Treatment apparatus and treatment method of nitrogen-containing organic matter - Google Patents

Abstract

To provide a treatment apparatus and a treatment method of nitrogen-containing organic matter which enable separation of ammonia from the nitrogen-containing organic matter.SOLUTION: A treatment apparatus 1 of nitrogen-containing organic matter comprises: an oxidative decomposition section 20 which generates a first fluid containing ammonia taking a nitrogen-containing organic matter as a subcritical condition; and an ammonia separation section 30 which separates ammonia from the first fluid. A treatment method of nitrogen-containing organic matter comprises: an oxidative decomposition step of generating a first fluid containing ammonia; and an ammonia separation step of separating ammonia from the first fluid.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a nitrogen-containing organic substance treatment apparatus and treatment method.

As a method of treating nitrogen-containing organic substances such as sewage sludge and livestock sludge, methods such as incineration treatment after volume reduction by biological treatment using incineration treatment and microorganisms are known.
In recent years, techniques for treating nitrogen-containing organic substances under conditions of high temperature and high pressure (supercritical conditions) above the critical point (374 ° C., 22 MPa) of water have been studied. When the nitrogen-containing organic matter is treated under supercritical conditions, the nitrogen-containing organic matter can be completely decomposed and detoxified.

  However, since the treatment under supercritical conditions is carried out under high temperature and high pressure conditions with severe corrosion, the durability of the device becomes a problem. Then, the method of processing a nitrogen-containing organic substance under subcritical condition which is low temperature or low pressure rather than supercritical condition is proposed (refer to patent documents 1).

  In Patent Document 1, in the first step, carbon components and hydrogen components, etc. in the nitrogen-containing organic matter which are relatively easily oxidized are oxidized to carbon dioxide and water, and the nitrogen component is converted to ammonia or low molecular weight nitrogen-containing organic matter . Then, in the second step, ammonia and residual nitrogen organic matter are decomposed into harmless nitrogen, carbon dioxide and water.

Patent No. 4838013

By the way, in recent years, ammonia has attracted attention as a storage and transport medium (energy carrier) of hydrogen energy.
The invention of Patent Document 1 does not consider the effective use of nitrogen in the nitrogen-containing organic substance.
Then, this invention aims at the processing apparatus and processing method of nitrogen-containing organic substance which can isolate | separate ammonia from nitrogen-containing organic substance.

In order to solve the above-mentioned subject, the present invention has the following modes.
[1] A nitrogen-containing organic substance comprising: an oxidative decomposition part which makes a nitrogen-containing organic substance a subcritical condition of water and generates a first fluid containing ammonia; and an ammonia separation part which separates ammonia from the first fluid Processing unit.

[2] A nitrogen-containing organic substance comprising: an oxidative decomposition step of making a nitrogen-containing organic substance into a subcritical condition of water to generate a first fluid containing ammonia; and an ammonia separation step of separating ammonia from the first fluid How to handle

  According to the nitrogen-containing organic substance treatment apparatus and method of the present invention, ammonia can be separated from the nitrogen-containing organic substance.

It is a schematic diagram of the processing apparatus of the nitrogen-containing organic substance which concerns on 1st embodiment of this invention. It is a schematic diagram of the processing apparatus of the nitrogen-containing organic substance which concerns on 2nd embodiment of this invention.

In the present specification, the subcritical condition of water is less than the critical temperature of water (374 ° C.) and less than the critical pressure of water (22 MPa), higher than the critical temperature of water and lower than the critical pressure of water, or lower than the critical temperature of water and It includes anything above the critical pressure of water.
In the present specification, the above-mentioned oxidative decomposition of organic sludge under subcritical conditions of water is referred to as subcritical hydroxylation treatment.

First Embodiment
<Processing equipment for nitrogen-containing organic substances>
An apparatus for treating nitrogen-containing organic matter according to the present invention includes an oxidative decomposition unit and an ammonia separation unit.
Below, 1st embodiment of the processing apparatus of the nitrogen-containing organic substance of this invention is described in detail based on FIG.

  As shown in FIG. 1, the nitrogen-containing organic substance treatment apparatus 1 of the present embodiment (hereinafter, also simply referred to as the treatment apparatus 1) includes a supply unit 10, an oxidative decomposition unit 20, an ammonia separation unit 30, A heater 40, a first measurement unit 50, a high pressure pump P1, a discharge pump P2, a pressure control valve B1, and pipes L0, L1, L2, L3, L3, L4, and L5 are provided.

  The supply unit 10 and the oxidation decomposition unit 20 are connected by a pipe L0. The oxidative decomposition unit 20 and the ammonia separation unit 30 are connected by a pipe L1. A pipe L2 is connected to the oxidative decomposition unit 20. The ammonia separation unit 30 is connected to a pipe L3, a pipe L4, and a pipe L5. The high pressure pump P1 is provided in the pipe L0. The discharge pump P2 is provided in the pipe L2. The pressure adjustment valve B1 is provided in the pipe L1.

  The oxidative decomposition unit 20 includes a first heater 40. The first measuring unit 50 is connected to the oxidative decomposition unit 20.

  The ammonia separation unit 30 opens and closes the adsorption tower 301, the adsorption tower 302, the gas-liquid separator 303, the second heater 341, the third heater 342, the second measurement unit 351, the third measurement unit 352, and Valves B6 and B7, pressure control valves B8 to B11, and pipes L6 to L11 are provided.

  The pipe L1 is connected by a branch 70 to the pipe L6 and the pipe L7. The pipe L6 is connected to the adsorption tower 301. The pipe L7 is connected to the adsorption tower 302. A second measurement unit 351 is connected to the adsorption tower 301. A third measurement unit 352 is connected to the adsorption tower 302. The adsorption tower 301 and the gas-liquid separator 303 are connected by a pipe L10. A pipe L8 is connected to the adsorption tower 301. A pipe L9 is connected to the adsorption tower 302. The pipe L8 is connected to the pipe L3 at a branch 72. The pipe L9 is connected to the pipe L3 at a branch 72. A pipe L4 is connected to the gas-liquid separator 303. A pipe L5 is connected to the gas-liquid separator 303. A pipe L11 is connected to the adsorption tower 302. The pipe L11 is connected to the pipe L10 at a branch 74.

  The on-off valve B6 is provided in the pipe L6. The on-off valve B7 is provided in the pipe L7.

  The pressure adjustment valve B8 is provided in the pipe L8. The pressure adjustment valve B9 is provided in the pipe L9. The pressure adjustment valve B10 is provided in the pipe L10. The pressure adjustment valve B11 is provided in the pipe L11.

  The supply unit 10 supplies the nitrogen-containing organic substance to the oxidative decomposition unit 20. As the supply unit 10, a nitrogen-containing organic substance may be supplied, and a part of a water distribution pipe of a sewage treatment facility, a tank capable of temporarily storing organic sludge, a vehicle carrying organic sludge, and the like can be mentioned.

  Examples of the oxidative decomposition unit 20 include a pressure container made of metal such as stainless steel or nickel alloy.

As the adsorption column 301, for example, a pressure-resistant container filled with an adsorbent that adsorbs ammonia in the first fluid can be mentioned. The pressure-resistant container may be, for example, a container made of metal such as stainless steel or nickel alloy.
The inside of the adsorption tower 301 is filled with an adsorbent (not shown) that selectively adsorbs ammonia.
Examples of the adsorbent include known adsorbents such as zeolite. Alternatively, magnesium phosphate which reacts with ammonia to form magnesium phosphate ammonia may be applied.

As the adsorption tower 302, the same pressure vessel as the adsorption tower 301 can be mentioned. The adsorption tower 302 and the adsorption tower 301 may be different or the same.
An adsorbent (not shown) that selectively adsorbs ammonia is packed inside the adsorption tower 302.
Examples of the adsorbent in the adsorption tower 302 include the same adsorbent as the adsorbent in the adsorption tower 301. The adsorbent in the adsorption tower 302 and the adsorbent in the adsorption tower 301 may be different or the same.

  Examples of the gas-liquid separator 303 include conventionally known devices such as a condenser including a heat exchanger.

As the first heater 40, any heater capable of heating the inside of the oxidative decomposition section 20 may be used, and a steam heater for passing high temperature steam, a gas boiler, etc. may be mentioned.
As the second heater 341, the same heater as the first heater 40 may be mentioned. The second heater 341 and the first heater 40 may be different or the same.
The third heater 342 may be the same as the first heater 40. The third heater 342 and the first heater 40 may be different or the same. The third heater 342 and the second heater 341 may be different or the same.

As the first measurement unit 50, the temperature, pressure, ammonia concentration and the like inside the oxidative degradation unit 20 may be measured, and a well-known thermometer, pressure gauge, concentration measurement meter and the like can be exemplified.
As the second measurement unit 351, an instrument similar to the first measurement unit 50 can be mentioned. The second measurement unit 351 and the first measurement unit 50 may be different or the same.
As the third measurement unit 352, an instrument similar to the first measurement unit 50 can be mentioned. The third measuring unit 352 and the first measuring unit 50 may be different or the same. The third measuring unit 352 and the second measuring unit 351 may be different or the same.

  As the high pressure pump P1, it is sufficient if the nitrogen-containing organic substance can be pressure-fed from the supply unit 10 to the oxidative decomposition unit 20, and a high pressure liquid transfer pump, a compressor, etc. may be mentioned.

  As the discharge pump P2, it is sufficient if the solid content of the nitrogen-containing organic substance can be pumped to the outside from the oxidative decomposition section 20, and a suction pump, a vacuum pump, etc. may be mentioned.

As pressure regulation valve B1, a well-known valve, a pressure regulation valve, etc. can be illustrated. The pressure control valve B1 may have a function as an open / close valve.
As pressure control valve B8-B11, the valve similar to pressure control valve B1 is mentioned. The pressure control valves B8 to B11 and the pressure control valve B1 may be different or the same. The pressure control valves B8 to B11 may be different from one another or may be the same.

A well-known valve, an on-off valve, etc. can be illustrated as on-off valve B6.
Examples of the on-off valve B7 include the same valves as the on-off valve B6. The on-off valve B7 and the on-off valve B6 may be different or the same.

  First heater 40, second heater 341, third heater 342, first measurement unit 50, second measurement unit 351, third measurement unit 352, high pressure pump P1, discharge pump P2, pressure adjustment valve B1, B8 to B11, The on / off valves B6 and B7 are preferably collectively controlled to be ON / OFF, open / close, etc. by a control unit (not shown) provided outside.

As piping L0, metal piping, such as stainless steel, etc. are mentioned.
Examples of the pipes L1 to L11 include the same pipes as the pipe L0. The pipes L1 to L11 and the pipe L0 may be different or the same. The pipes L1 to L11 may be different from each other or may be the same.

<Method of treating nitrogen-containing organic matter>
In the method of treating nitrogen-containing organic matter according to the present invention, the nitrogen-containing organic matter is treated as a subcritical condition of water, and an oxidative decomposition step of producing a first fluid containing ammonia, and an ammonia separation step of separating ammonia from the first fluid And.
A method of treating nitrogen-containing organic substances using the treatment apparatus 1 will be described based on FIG.

First, the on-off valve B7 and the pressure control valves B8, B9, and B11 are closed.
Next, a slurry mixture of a mixture containing nitrogen-containing organic matter and water is supplied from the supply unit 10 to the oxidative decomposition unit 20 via the high pressure pump P1.

(Oxidative decomposition process)
After supplying a mixture containing a nitrogen-containing organic substance and a slurry mixture of water to the oxidative decomposition section 20, the first heater 40 is heated, and the high pressure pump P1 is pressurized to make the nitrogen-containing organic substance a subcritical condition of water. .
By setting the nitrogen-containing organic substance under the subcritical condition of water, the nitrogen-containing organic substance is oxidatively decomposed into carbon dioxide, water, ammonia, nitrogen, etc., and a first fluid is generated.

The internal temperature (hereinafter, also referred to as a first processing temperature) of the oxidative decomposition unit 20 in the oxidative decomposition step can be measured by the first measurement unit 50.
The first treatment temperature is not less than the critical temperature (374 ° C.) of water, preferably 374 ° C. or more and 500 ° C. or less, and more preferably 400 ° C. or more and 450 ° C. or less. A nitrogen-containing organic substance can fully be oxidatively decomposed as the 1st processing temperature is more than the above-mentioned lower limit. It is easy to improve the conversion rate to ammonia contained in the first fluid as the first treatment temperature is below the upper limit value, and it is easy to save the energy when heating the first heater 40.

The internal pressure (hereinafter, also referred to as a first treatment pressure) of the oxidative decomposition unit 20 in the oxidative decomposition step can be measured by the first measurement unit 50.
The first treatment pressure is less than the critical pressure (22 MPa) of water, preferably 5 MPa or more and 20 MPa or less, more preferably 10 MPa or more and 20 MPa or less, and still more preferably 10 MPa or more and 15 MPa or less. A nitrogen-containing organic substance can fully be oxidatively decomposed as the 1st processing pressure is more than the above-mentioned lower limit. When the first processing pressure is equal to or less than the upper limit value, the load on the oxidative decomposition section 20 can be easily reduced.

  The nitrogen-containing organic substance refers to an organic substance containing a nitrogen component. Examples of the nitrogen-containing organic substance include ammonia-containing digestive fluid discharged from a methane fermentation process, food waste, livestock waste, and biomass waste such as organic sludge.

The nitrogen-containing organic substance contains water, and is usually dehydrated and then incinerated.
In the processing apparatus 1 of the present embodiment, the nitrogen-containing organic matter is oxidized and decomposed by setting the oxidative decomposition unit 20 at a high temperature and a high pressure, so that the dehydration step and the incineration step are unnecessary.
In addition, the solid content of the nitrogen-containing organic substance produced | generated at the oxidative decomposition process can be discharged | emitted to the exterior of the oxidative decomposition part 20 via the piping L2 using the discharge pump P2.

  The water content of the nitrogen-containing organic substance is preferably 90% by mass or more. When the water content of the nitrogen-containing organic substance is at least the lower limit value, the flowability from the supply unit 10 to the oxidative decomposition unit 20 is excellent, and the processing apparatus 1 can be operated continuously, so the processing efficiency of the processing apparatus 1 is improved. Cheap.

  In the oxidative decomposition step, air, oxygen in air, hydrogen peroxide water and the like can be used as an oxidant. It is preferable that the oxidizing agent be supplied in excess of the amount of oxygen required for the oxidative decomposition reaction of the nitrogen-containing organic substance to completely oxidize and decompose the nitrogen-containing organic substance. For this reason, the oxidizing agent supplied to the oxidation degradation part 20 at an oxidation degradation process can set the oxygen ratio inside the oxidation degradation part 20 to a standard, for example. 1.0 or more and 2.5 or less are preferable, as for the oxygen ratio of the oxidative degradation part 20, 1.2 or more and 2.0 or less are more preferable, and 1.2 or more and 1.5 or less are more preferable. If the oxygen ratio of the oxidative decomposition section 20 is equal to or more than the above lower limit value, the conversion to ammonia contained in the first fluid is likely to be improved. Excessive supply of the oxidizing agent can be suppressed when the oxygen ratio of the oxidative degradation unit 20 is equal to or less than the upper limit value.

  1 minute or more and 30 minutes or less are preferable, 1 minute or more and 20 minutes or less are more preferable, and, as for the heating-pressing time (henceforth 1st process time) in an oxidation decomposition process, 1 minute or more and 15 minutes or less are more preferable. A nitrogen-containing organic substance can fully be oxidatively decomposed as the 1st processing time is more than the above-mentioned lower limit. It is easy to improve the conversion rate to ammonia contained in the 1st fluid as the 1st processing time is below the above-mentioned upper limit, and it is easy to save the energy at the time of heating the 1st heater 40.

  The first fluid generated in the oxidative decomposition process flows into the ammonia separation unit 30 through the pipe L1.

(Ammonia separation process)
The ammonia separation step is a step of separating ammonia contained in the first fluid.
The first fluid that has flowed into the ammonia separation unit 30 flows into the adsorption tower 301 via the pipe L6.
The ammonia contained in the first fluid is selectively adsorbed and separated by the adsorbent packed inside the adsorption column 301.

  The first fluid after the ammonia is adsorbed flows into the gas-liquid separator 303 through the pipe L10.

Next, the on-off valve B6 and the pressure adjustment valve B10 are closed, and the on-off valve B7 and the pressure adjustment valves B8 and B11 are opened.
The first fluid that has flowed into the ammonia separation unit 30 flows into the adsorption tower 302 via the pipe L7.
The ammonia contained in the first fluid is selectively adsorbed and separated by the adsorbent packed inside the adsorption tower 302.

  The first fluid after the ammonia is adsorbed flows into the gas-liquid separator 303 through the pipe L11, the branch 74, and the pipe L10.

While adsorbing ammonia in the adsorption tower 302, the second heater 341 heats the adsorption tower 301.
By heating the adsorption tower 301, the ammonia adsorbed on the adsorbent in the adsorption tower 301 is desorbed.

The ammonia desorbed from the adsorbent is recovered to the outside of the processing apparatus 1 through the pipe L8, the branch 72, and the pipe L3.
At this time, the ammonia may be a gas or a liquid. Ammonia recovered to the outside is preferably liquid from the viewpoint of easy handling in utilization as an energy source. For example, ammonia can be recovered as a liquid by adjusting the pressure control valve B8 so that the pressure inside the adsorption column 301 is 0.8 MPa or more.

Next, the on-off valve B7 and the pressure adjustment valves B8 and B11 are closed, and the on-off valve B6 and the pressure adjustment valves B9 and B10 are opened.
While adsorbing ammonia in the adsorption tower 301, the adsorption tower 302 is heated by the third heater 342.
By heating the adsorption tower 302, the ammonia adsorbed on the adsorbent inside the adsorption tower 302 is desorbed.

The ammonia desorbed from the adsorbent is recovered to the outside of the processing apparatus 1 through the pipe L9, the branch 72, and the pipe L3.
For example, ammonia can be recovered as a liquid by adjusting the pressure control valve B9 so that the pressure inside the adsorption column 302 is 0.8 MPa or more.

By alternately using two adsorption towers 301 and 302 in the ammonia separation step, while adsorbing ammonia in one adsorption tower, the other adsorption tower is heated to desorb the ammonia from the adsorbent Can.
Thus, ammonia can be efficiently separated and recovered by alternately using the two adsorption towers 301 and 302.
In the present embodiment, two adsorption towers are used, but the number of adsorption towers is not limited to two, and may be three or more.

The temperature and pressure inside the adsorption tower 301 can be measured by the second measurement unit 351. The temperature and pressure inside the adsorption tower 302 can be measured by the third measurement unit 352.
The state of ammonia can be controlled by the temperature and pressure inside the adsorption column 301 or 302.
The temperature inside the adsorption tower 301 can be controlled by the second heater 341. The temperature inside the adsorption tower 302 can be controlled by the third heater 342. The pressure inside the adsorption tower 301 can be controlled by pressure control valves B8 and B10. The pressure inside the adsorption tower 302 can be controlled by pressure control valves B9 and B11.

As a heat source of the second heater 341, the reaction heat by the subcritical water oxidation treatment in the oxidation decomposition process can be used. The energy consumed by the second heater 341 can be saved by using the reaction heat.
As a heat source of the third heater 342, the reaction heat of the subcritical water oxidation treatment in the oxidation decomposition process can be used. The energy consumption of the third heater 342 can be saved by using the reaction heat.

The first fluid flowing into the gas-liquid separator 303 is separated into gas and liquid.
The gas separated from the first fluid is discharged to the outside of the processing apparatus 1 through the pipe L4.
The liquid separated from the first fluid is discharged to the outside of the processing apparatus 1 through the pipe L5.

According to the processing apparatus 1 of the present embodiment, the nitrogen-containing organic substance can be rapidly processed by the subcritical hydroxylation treatment.
In addition, separated ammonia can be used as an energy source.

Second Embodiment
<Processing equipment for nitrogen-containing organic substances>
In FIG. 2, the schematic diagram of the processing apparatus of the nitrogen-containing organic substance which concerns on 2nd embodiment of this invention is shown. The same components as those in the first embodiment are given the same reference numerals, and the description thereof is omitted.
As shown in FIG. 2, the nitrogen-containing organic substance processing apparatus 2 (hereinafter, also simply referred to as the processing apparatus 2) according to this embodiment includes an ammonia separation unit 30 ′ instead of the ammonia separation unit 30.

  The oxidative decomposition unit 20 and the ammonia separation unit 30 'are connected by a pipe L1. The ammonia separation unit 30 'is connected to a pipe L3, a pipe L4, and a pipe L5.

  The ammonia separation unit 30 'includes a gas-liquid separator 304, a distillation column 305, a partial condenser 306, and pipes L12, L13, and L14.

  The gas-liquid separator 304 and the distillation column 305 are connected by a pipe L12. The distillation column 305 and the partial condenser 306 are connected by a pipe L13. The partial condenser 306 and the distillation column 305 are connected by a pipe L14. A pipe L1 is connected to the gas-liquid separator 304. A pipe L4 is connected to the gas-liquid separator 304. A fourth measurement unit 353 is connected to the distillation column 305. A pipe L5 is connected to the distillation column 305. The piping L 3 is connected to the partial compression device 306.

  Examples of the gas-liquid separator 304 include the same devices as the gas-liquid separator 303. The gas-liquid separator 304 and the gas-liquid separator 303 may be different or the same.

  The distillation column 305 includes a known distillation column used for the production of ammonia.

  As the partial condenser 306, a conventionally known condenser can be mentioned.

  As the fourth measurement unit 353, an instrument similar to the first measurement unit 50 can be mentioned. The fourth measurement unit 353 and the first measurement unit 50 may be different or the same.

  The fourth measuring unit 353 is preferably controlled by a control unit (not shown) provided outside.

  As piping L12-L14, piping similar to piping L0 is mentioned. The pipes L12 to L14 and the pipe L0 may be different or the same. The pipes L12 to L14 may be different from each other or may be the same.

<Method of treating nitrogen-containing organic matter>
A method of treating nitrogen-containing organic substances using the treatment apparatus 2 will be described based on FIG.

(Oxidative decomposition process)
The first fluid generated in the oxidative decomposition process flows into the gas-liquid separator 304 through the pipe L1.

(Ammonia separation process)
The first fluid flowing into the gas-liquid separator 304 is separated into a gas and a liquid containing ammonia. Examples of the liquid containing ammonia include liquid ammonia and aqueous ammonia.
The gas separated from the first fluid is discharged to the outside of the processing apparatus 2 through the pipe L4.
The liquid separated from the first fluid flows into the distillation column 305 through the pipe L12.

The liquid flowing into the distillation column 305 is separated into a gas phase with high ammonia concentration and a liquid phase with low ammonia concentration inside the distillation column 305. The gas phase flows into the partial condenser 306 through the pipe L13. The ammonia in the gas phase that has flowed into the partial condenser 306 is concentrated and recovered in the form of liquid or gas to the outside of the processing apparatus 2 through the pipe L3.
For example, ammonia can be recovered as a liquid by setting the pressure inside the partial condenser 306 to 0.8 MPa or more.

  The distillate cooled by the partial condenser 306 is refluxed to the distillation column 305 through the pipe L14.

  The liquid phase separated inside the distillation column 305 is discharged to the outside of the processing apparatus 2 through the pipe L5.

The temperature and pressure inside the distillation column 305 can be measured by the fourth measurement unit 353.
The state of ammonia can be controlled by the temperature and pressure inside the partial condenser 306.
The temperature inside the partial condenser 306 can be controlled by the temperature and flow rate of the cooling water outside the partial condenser 306. The pressure inside the partial condenser 306 can be controlled by a high pressure pump or the like (not shown) provided at an arbitrary position in the piping.

  The distillation column 305 can be heated by a reboiler or the like (not shown). As a heat source of a reboiler etc., the reaction heat by the subcritical hydroxylation process in an oxidation decomposition process can be used. By utilizing the heat of reaction, energy consumption when heating the distillation column 305 can be saved.

  According to the processing apparatus 2 of the present embodiment, ammonia can be separated from the first fluid without using an adsorbent. Therefore, the process of regenerating the adsorbent can be omitted.

As mentioned above, although the processing apparatus and processing method of the nitrogen-containing organic substance of this invention were demonstrated, this invention is not limited to said embodiment, It can change suitably in the range which does not deviate from the meaning.
The ammonia separation unit may be in an aspect other than the ammonia separation unit 30 or 30 'described above.
For example, the oxidative decomposition part and the ammonia separation part may be in a mode in which the same container doubles.
In the above-mentioned embodiment, although high pressure pump P1 is provided in piping L0, it may be provided in arbitrary places in other piping.
The number of high pressure pumps is not limited to one, and two or more may be provided.
Instead of a high pressure pump, a vacuum pump may be used to move the fluid between the devices.
The on-off valve may be provided at any place in another pipe.
The pressure control valve may be provided at any place in other piping.

  In the oxidation decomposition step of the present embodiment, the first treatment temperature is equal to or higher than the critical temperature of water, and the first treatment pressure is lower than the critical pressure of water, but the first treatment temperature satisfying the subcriticality of water; The first processing pressure may be used. As a combination of temperature and pressure satisfying the subcritical condition of water, the first treatment temperature is less than the critical temperature of water, the first treatment pressure is greater than the critical pressure of water, and the first treatment temperature is less than the critical temperature of water And combinations where the first process pressure is less than the critical pressure of water.

According to the nitrogen-containing organic substance treatment apparatus of the present invention, ammonia can be produced at a high conversion rate in the oxidative decomposition section.
According to the nitrogen-containing organic substance treatment apparatus of the present invention, ammonia can be separated in the ammonia separation unit. By separating ammonia, ammonia can be recovered with high efficiency, and nitrogen in nitrogen-containing organic matter can be effectively used.
According to the nitrogen-containing organic substance treatment apparatus of the present invention, organic sludge can be reliably treated.

1, 2 ... nitrogen-containing organic substance treatment apparatus, 10 ... supply unit, 20 ... oxidation decomposition unit, 30, 30 '... ammonia separation unit, 40 ... first heater, 50 ... first measurement unit, 301, 302 ... adsorption tower , 303, 304: gas-liquid separator, 305: distillation column, 306: partial condenser, 341: second heater, 342: third heater, 351: second measuring unit, 352: third measuring unit, 353: third 4 measuring part, P1 ... high pressure pump, P2 ... discharge pump, B1, B8 to B11 ... pressure adjusting valve, B6, B7 ... on-off valve, L0, L1 to L14 ... piping

Claims (2)

An oxidative decomposition section that makes the nitrogen-containing organic matter a subcritical condition of water and generates a first fluid containing ammonia,
An ammonia separation unit for separating ammonia from the first fluid;
An apparatus for treating nitrogen-containing organic matter. An oxidative decomposition step of making the nitrogen-containing organic matter into a subcritical condition of water to generate a first fluid containing ammonia;
An ammonia separation step of separating ammonia from the first fluid;
A method of treating nitrogen-containing organic matter, comprising:

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