JP2019044029A - Production method of fulvic acid solution - Google Patents

Abstract

To provide a production method of a fulvic acid solution utterly different in constitution from a conventional one.SOLUTION: A raw material containing a wood chip is charged in a processor 10 that is provided with: a closed vessel 12 having a closable treatment space inside; steam ejecting means 14 for ejecting steam of high temperature and high pressure into the closed vessel; an opening/closing mechanism 24; a charge port 20 for feeding a raw material to the closed vessel; an opening/closing mechanism 26; and an exhaust port 16 for exhausting a treatment liquid generated by the treatment of the raw material with the steam outside, steam at a temperature of 120 to 250°C and at a pressure of 12 to 35 atm, while introducing the steam, the raw material is stirred, the raw material is treated by a subcritical water reaction, followed by cooling after the treatment, and a mixed solution containing a fulvic acid and a humic acid is obtained. From the obtained solution, the humic acid and the fulvic acid are separated and treated to obtain a fulvic acid solution.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method of producing a fulvic acid solution, and a fulvic acid solution produced by the method.

  Humic substances are said to be a generic name of "organic substances whose chemical structure is not specified (non-living organic substances)" in which biological organic substances are destroyed by microbial and chemical actions after the death of the organism. It is empirically known that the humic substances also have functional and non-functional ones, which means that the organic matter which is the organic matter in the natural world is to be returned to the soil. It is considered that the influence of whether or not an intermediate product is included is significant. When this intermediate product is included, that is, humic substances that exhibit functionality, they may be called humus precursors. (Non-patent document 1)

  The humic substances (or humic precursors) are those existing in the natural world, and even if it has been unknown since the existence of humic substances has long been known, medicinal effects on crop growth, disease and injury. Etc. effects have been used in various ways. On the other hand, in recent years, modern agriculture and raw material processing methods that actively use developed chemical substances and the like are widely used. However, apart from such modern agriculture and raw material processing, it is beginning to be reviewed once again using this humic substance that has been used since ancient times, and artificially produced fulvic acid in high concentration selectively Some solutions and the like are also sold.

  For example, Patent Document 1 discloses a method of treating wastewater using a bacterial group consisting of soil facultative anaerobes or the like which has been advanced to produce a metabolite containing a compound having a phenol or / and a phenol exposure group. Technology. This "metabolite containing a compound having a phenol or / and a phenol exposed group" is one which causes a polycondensation reaction of humification by reacting with silicic acid etc., and is an excellent waste water utilizing humus. It is an attempt to disclose a processing method.

  As seen in Patent Document 1 and Non-patent Document 1, techniques using humus precursors and humic substances (humus) have been studied. Here, it is known that humus contains humin, fulvic acid, humic acid and the like as the humification degree (the degree of polycondensation reaction) of the component. And in the general humic substance, the ratio of fulvic acid and humic acid is contained in a weight ratio of about 2: 8.

  As shown in Patent Document 1, in the process of treating waste water containing organic substances, there are those that use this humic substance, but fulvic acid, humic acid and the like in humic substances are not simple substances, It has not been sufficiently studied which substance will produce what kind of effect concretely because all are regarded as a group of a plurality of organic compounds and it is difficult to separate them. . However, the commercially available solution containing fulvic acid is expected to be effective as a (micro) bioactive liquid, and it is further expected to be used for applications such as agriculture where it is necessary to provide a large amount of inexpensive products as much as possible. In order to promote the utilization of products, products containing high concentration of fulvic acid selectively are required.

  Therefore, in Japanese Patent Application Laid-Open No. 2017-12947 (Patent Document 2), humic substances among humic substances which are expected to be used as (micro) bioactive liquids are humic substances in comparison with a general humic substance ratio. The following production method has been proposed for the purpose of providing a method for producing a fulvic acid-rich solution containing a high ratio of fulvic acid to acid.

  The method for producing a fulvic acid-containing solution proposed in the above-mentioned Patent Document 2 is a mixed solution of an organic substance and fulvic acid-adapted sludge in an organic substance mixed solution with a dissolved oxygen concentration of 0.1 mg-O / L or less for 4 hours By conducting the above culture, an anaerobic culture step of reducing the organic substance of the organic substance mixed solution by anaerobic culture to make an anaerobic culture solution, and a dissolved oxygen concentration of 0.2 mg-O / of the anaerobic culture solution The aerobic culture step of obtaining a fulvic acid-containing culture solution by increasing the fulvic acid in the anaerobic culture solution by culturing for 6 hours or more as L or more, and the culture completed in the aerobic culture step are completed The method is characterized in that an fulvic acid-containing solution is obtained from an aerobic culture solution return step of returning the previous culture solution to the anaerobic culture step, and a fulvic acid-containing culture solution obtained from the aerobic culture step.

Japanese Examined Patent Publication 5-66199

JP, 2017-112947, A

Naimizu "Nature and Rebirth Earth, Nature, Humans and Society Basic Civilization", pp. 18-28, Manga, 1986

  The main object of the present invention is to provide a method for producing a fulvic acid solution which is completely different from those described in the above-mentioned publication.

The above-mentioned subject is achieved by the manufacturing method etc. of the fulvic acid solution of the present invention of the composition of the following (1)-(15).
(1)
An enclosed container having a process space closable therein, a vapor ejection means for ejecting high-temperature high-pressure vapor into the enclosed container, an opening / closing mechanism, and a supply unit for supplying a raw material into the enclosed container An apparatus preparing step of preparing a processing apparatus having an opening / closing mechanism, and a discharge unit for discharging the processing solution generated by the processing of the raw material by the steam to the outside;
A raw material charging step of charging a raw material containing wood chips as a main raw material from the supply unit into the treatment space of the closed container of the treatment apparatus;
The raw material is subjected to a subcritical water reaction process while stirring the raw material while introducing a steam having a temperature of 120 to 250 ° C. and a pressure of 12 to 35 atm into the processing space into which the raw material is charged. A process of obtaining a mixed solution containing a suspension of fulvic acid, humic acid and wood chips and / or fragments thereof;
A process for producing a fulvic acid solution, comprising: a fulvic acid solution acquiring step of separating the fulvic acid from the acquired mixed solution to acquire a fulvic acid solution.
(2)
The manufacturing method of the fulvic acid solution of said (1) whose said wood is felled wood or waste wood.
(3)
The manufacturing method of the fulvic acid solution of said (2) whose said felling material is a hardwood or a softwood.
(4)
The method for producing a fulvic acid solution according to (3) above, wherein the hardwood is white oak, willow, chestnut, nara or beech.
(5)
The manufacturing method of the fulvic acid solution of said (3) whose said conifer is a pine, a cedar, a Japanese cypress or a morning sun.
(6)
The manufacturing method of the fulvic acid solution of said (2) whose said waste materials are solid wood or a plywood material.
(7)
The manufacturing method of the fulvic acid solution in any one of said (1)-(6) the said process process is performed for 1 to 8 hours.
(8)
The method for producing a fulvic acid solution according to (3), wherein the main raw material is a hardwood and the pressure of steam introduced in the treatment step is 12 to 25 atm.
(9)
The method for producing a fulvic acid solution according to (3), wherein the main raw material is softwood and the pressure of steam introduced in the treatment step is 20 to 35 atm.
(10)
The manufacturing method of the fulvic acid solution in any one of said (1)-(9) which introduce | transduces a raw material 90% or less of the said process space with a volume ratio.
(11)
The manufacturing method of the fulvic acid solution in any one of said (1)-(9) which introduce | transduces a raw material 50 to 80% of the said process space by a volume ratio.
(12)
The manufacturing method of the fulvic acid solution in any one of said (1)-(11) the stirring in the said process process is performed by the rotating stirring member arrange | positioned in the said process space.
(13)
The manufacturing method of the fulvic acid solution in any one of said (1)-(12) which adds an alkaline solution as an additive in the said raw material injection | throwing-in process.
(14)
The fulvic acid solution manufactured by the manufacturing method of the fulvic acid solution in any one of said (1)-(13).
(15)
The useful thing for agricultural and livestock products containing the solid content obtained by the manufacturing method of the fulvic acid solution in any one of said (1)-(13).

As described above, the present invention provides a method for producing a completely new fulvic acid solution starting from wood chips.
According to the method for producing a fulvic acid solution of the present invention, it is possible to obtain a highly pure fulvic acid solution.

It is sectional drawing which shows an example of the manufacturing apparatus for enforcing the manufacturing method of the fulvic acid solution by embodiment of this invention. FIG. 2 a is a drawing substitute photograph showing a three-dimensional excitation-fluorescence spectrum of the sample of Example 1. FIG. 2 b is a drawing-substituting photograph showing a three-dimensional excitation-fluorescence spectrum of the sample of Example 2. FIG. 2 c is a drawing substitute photograph showing a three-dimensional excitation-fluorescence spectrum of the sample of Example 1. FIG. 2 d is a drawing-substituting photograph showing a three-dimensional excitation-fluorescence spectrum of the sample of Example 2. FIG. 2 e is a drawing-substituting photograph showing a three-dimensional excitation-fluorescence spectrum of the sample of Example 1. FIG. 2 f is a drawing-substituting photograph showing a three-dimensional excitation-fluorescence spectrum of the sample of Example 2. FIG. 2g is a drawing substitute photograph showing a three-dimensional excitation-fluorescence spectrum of a standard substance. FIG. 2 h is a drawing substitute photograph showing a three-dimensional excitation-fluorescence spectrum of a standard substance.

Hereinafter, an embodiment of a method for producing a fulvic acid solution of the present invention will be described.
First, an example of a manufacturing apparatus (processing apparatus) 10 for performing the method for manufacturing a fulvic acid solution according to the embodiment of the present invention will be described.
FIG. 1 is a cross-sectional view of the manufacturing apparatus.

  The manufacturing apparatus 10 includes a closed vessel 12 having a closed space S1 containing a raw material which is a wood chip inside, and a steam jetting means 14 which jets high temperature / high pressure steam which is subcritical water into the closed vessel 12; A discharge port 16 provided on the bottom side of the sealed container 12 and having an open / close mechanism 26, and a separation and recovery means 18 for separating and recovering the raw material and liquid processed only by the direct discharge operation from the discharge port 16 ing. The shape of the closed container 12 may be, for example, a rectangular box, a three-dimensional polygonal cylinder, a cylinder, a barrel, a drum, or any other shape, but using gravity from the discharge port 16 provided on the lower surface side It is preferable that the shape be discharged. It is preferable that the lower surface of the closed container is inclined downward toward the discharge port.

  The separation and recovery means 18 has another closed space S2 different from the closed space S1 of the closed vessel 12, and the liquid recovery part 50 communicating with the inside of the closed vessel 12 through the discharge port 16; And a natural flow recovery mechanism 52 for recovering only the liquid from the recovery section 50 by the natural flow down the discharge port 16. The raw material as a solid content processed in the vicinity of the discharge port 16 remains as it is in the closed container 12, and the raw material and the liquid can be separated and recovered by naturally flowing only the liquid to the recovery unit 50 using gravity. The configuration of the recovery unit 50 may be, for example, a metal tank, a box of a three-dimensional polygonal shape, a tubular body, or any other configuration having a closed space S2 for recovering the liquid. You may form two or more accommodating parts.

The natural downstream recovery mechanism 52 may include the same pressure forming means 62 that brings the closed space S1 of the closed container 12 and the closed space S1 of the recovery unit 50 to the same pressure before the liquid recovery operation. If the closed container 12 and the recovery unit 50 are always at the same pressure, the liquid recovery operation can be performed immediately after the treatment, and the operation time can be shortened.
In the above example, the separation unit is incorporated into the processing apparatus. However, the processing apparatus itself may be provided separately without providing the separation unit.

  Further, the same pressure forming means 62 may be provided to make the closed space S1 of the closed container 12 and the closed space S2 of the recovery unit 50 the same pressure. The same pressure forming means 62 has the same pressure communicating pipe 64 which connects the closed space S1 of the closed container 12 and the closed space S2 of the collection portion 50 through another path different from the liquid recovery path through the discharge port 16 You may do it. The same pressure communication pipe 64 may be in constant communication with the closed space S1 and the closed space S2 to keep the inside of the closed container 12 and the inside of the recovery unit 50 always in the same pressure state. The same pressure communication pipe 64 may communicate the closed container 12 and the collection unit 50 at least before the liquid recovery operation to obtain the same pressure, and an opening / closing mechanism for connecting / closing the same pressure communication pipe is used. It may be provided.

  Further, the communication between the pressure communication pipe 64 forming another path and the sealed container 50 may be performed via the communication connection portion 68 set on the upper end side of the sealed container 12.

  In addition, the natural downflow recovery mechanism 52 includes a liquid recovery flow path 54 that communicably connects the discharge port 16 of the closed container 12 and the recovery portion 50, and the liquid recovery flow path 54 is a recovery portion from the communication side with the discharge port 16. It may be provided horizontally or downwardly inclined toward the 50 side.

  Further, an open / close mechanism 26 is provided in the middle of the discharge route R1 from the discharge port 16 of the processed raw material, and the liquid introduction port 58 of the liquid recovery flow path 54 is connected in communication with the discharge upstream side of the open / close mechanism 26. It may be

  In addition, the liquid recovery flow path 54 selects the communication state so as to shut off the flow path during processing of the raw material in the sealed container 12 and to connect the flow path when recovering only the liquid after the processing. An open / close mechanism 60 may be provided.

  In addition, the bottom surface of the closed space S2 of the recovery unit 50 may be provided lower than the position of the discharge port 16 of the sealed container 12.

  In addition, the recovery unit 50 may be provided such that the liquid level WL of the liquid recovered in the closed space S2 is always lower than the discharge port 16.

  The closed vessel 12 may have a stirring means 30 for stirring the raw material.

  In addition, the closed container 12 is formed in a barrel-like shape with a horizontal falling diameter gradually decreasing from the left and right center toward the left and right sides while the discharge port 16 is provided on the bottom side of the left and right center. Has a rotary shaft 49 provided horizontally in the closed vessel 12 and rotatably supported, and a stirring blade 48 attached to the rotary shaft 49 and having a portion extending in the circumferential direction of the rotary shaft 49. The length from the rotation shaft 49 of the stirring blade 48 to the tip of the blade is longer at the central position in the longitudinal direction of the rotation shaft 49 corresponding to the horizontal barrel shape of the closed vessel 12 and becomes shorter gradually toward both ends It may be formed to be

  Further, the steam jetting means 14 includes a rotary shaft / steam jetting pipe 28 having a rotary shaft 49 as a hollow pipe and a plurality of steam jetting holes 44 formed on the circumferential surface of the hollow pipe. It is also good.

In the present example, the closed container 12 is supported by the support legs 13 so as to be disposed at a certain height from the ground. The closed container 12 is formed in a barrel-like shape with a diameter which is gradually reduced from the center in the left-right direction toward the end wall 12 a on the left and right ends. The closed container 12 is formed, for example, by processing a metal plate so as to have heat and pressure resistance, and is provided in a size that can accommodate approximately 2 m ^{3 of} the raw material. The closed container 12 is provided with a loading unit 20 above the central portion and a discharge unit 22 on the bottom side of the central portion, and is provided so as to be opened and closed by the opening and closing mechanisms 24 and 26, respectively. In the closed space S1 of the closed container 12, a steam jet pipe 28 constituting the steam jet means 14 and a stirring means 30 for stirring the raw material are disposed. The sealed container 12 is provided with a safety valve 32 capable of, for example, adjusting the set pressure, which releases the internal steam when the internal pressure becomes higher than the set value. Further, a muffling and deodorizing device 34 is provided in the middle of the exhaust pipe connected to the safety valve 32, and the steam exhausted through the safety valve 32 is muffled and deodorized and discharged to the outside air side. .

  As shown in the figure, the discharge port 16 is opened on the bottom side of the central portion of the sealed container 12 in the left-right direction, and the discharge direction of the raw material is downward. The diameter of the discharge port 16 is, for example, about 300 mm. A discharge pipe 36 protruding downward is connected to the discharge port 16 to form a discharge path R1 of the processed raw material, and is provided in the middle of the discharge path R1 to open and close the discharge port 16 An opening and closing mechanism 26 is provided. That is, the discharge unit 22 is configured to include the discharge port 16, the discharge cylinder 36, and the opening / closing mechanism 26. Since the closed container 12 is formed in a horizontal barrel shape, the internal raw material tends to gather toward the central portion where the discharge port 16 is provided by gravity, and the raw material can be discharged simply by opening the opening / closing mechanism 26. It can be discharged from 16.

  An insertion port 42 is opened on the upper side of the closed container 12 in the insertion portion 20, and an insertion cylinder 43 projecting upward is attached to the insertion port 42, and a ball is opened and closed in the insertion cylinder 43, for example. An opening and closing mechanism 24 such as a valve is provided. The feed port 42 can be opened to feed the raw material into the closed container via the opening / closing mechanism 24, and it is closed during processing to maintain the closed state of the closed space S1 in the closed container 12.

  The steam jetting means 14 jets steam of high temperature and high pressure into the closed vessel 12 and brings the inside of the closed vessel 12 into high temperature and high pressure state to process the raw material through the steam. As shown in FIG. 1, the steam jet means 14 is disposed in the closed vessel 12 and has a steam jet pipe 28 formed of a hollow pipe having a number of steam jet holes 44 formed on the circumferential surface side, and steam generation of a boiler or the like. The apparatus 46 and a steam delivery pipe 47 for supplying steam from the steam generation apparatus 46 into the steam injection pipe 28 are included. The steam jetted from the steam jet unit 14 into the closed vessel 12 is set to a high temperature and high pressure such as subcritical water in order to properly process the raw material. For example, the steam jetted from the steam jet pipe 28 is set to a temperature of 120 to 250 ° C. and a pressure of about 15 to 35 atm. Then, the inside of the closed container 12 is set to a temperature of 120 to 250 ° C. and a pressure of about 15 to 35 atm. The steam jet pipe 28 is disposed laterally long at a substantially central position in the vertical direction of the sealed container 12, and is rotatably supported via bearings 45 provided on both end walls 12a of the sealed container. That is, the steam jet pipe 28 sprays steam radially while rotating about the horizontal axis, and applies steam directly to the raw material. The steam jet pipe 28 is configured to rotate by obtaining a rotational driving force from a rotational driving device 51 such as a motor via a chain or the like. Furthermore, the stirring blade 48 which comprises a stirring means is attached to the steam jet pipe 28, and the steam jet pipe 28 serves as the rotating shaft 49 of a stirring means. That is, in the present embodiment, the steam jetting means 14 has a rotary shaft 49 of the stirring means as a hollow tube, and a plurality of steam jetting holes are formed on the circumferential surface of the hollow tube. It includes a jet 28. The steam jetting means is not limited to the configuration of this embodiment, and may have any other structure such as a structure in which steam is jetted from the end of a pipe inserted into a sealed container, or a plurality of steam jet pipes. Good.

  The stirring means 30 is a means for stirring the raw material to be processed in the closed vessel, and can process the raw material evenly and at an early stage. The stirring means 30 includes a rotating shaft 49 consisting of the steam jet pipe 28 described above, and a stirring blade 48 attached to the rotating shaft 49 and having a portion extending in the circumferential direction of the rotating shaft. In the present embodiment, the stirring blade 48 is formed of a right-handed spiral blade 48a and a left-handed spiral blade 48b, which are provided oppositely to each other at a substantially central position in the axial direction of the rotating shaft 49. The stirring blade 48 is provided such that the length from the rotating shaft to the tip of the blade is gradually reduced in diameter from the left and right center to both ends. Thereby, the raw material can be reliably stirred corresponding to the horizontal barrel shape of the closed container 12. Furthermore, it is provided so as to form a certain clearance H between the blade tip and the inner wall of the sealed container 12. The spiral blades 48a and 48b stir the raw material while crushing the solid raw material while conveying the raw material from the central portion toward the both end wall side. The raw material transported to the both end walls 12a by the stirring blade 48 is pushed by the raw material transported later on the end wall 12a side, and returns to the center through the gap H along the inner wall of the sealed container 12 Transported to In addition, the stirring means 30 may be not only the thing of said structure but another arbitrary structure.

  The separation and recovery means 18 is a separation and recovery means for separating and recovering the processed raw material and the liquid in the sealed vessel 12 after the steam processing only by direct operation from the discharge port. As shown in FIG. 1, the separation and recovery means 18 causes the recovery unit 50 to recover the liquid by natural flow through the recovery portion 50 of the liquid communicating with the inside of the closed container 12 through the discharge port 16 and the discharge port 16. And a naturally falling recovery mechanism 52.

  The recovery unit 50 is a second closed container having another closed space S2 different from the closed space S1 of the closed container 12 therein. The recovery unit 50 is made of, for example, a metal-made cylindrical closed tank having heat and pressure resistance. The recovery unit 50 is connected in communication with the discharge port 16 of the sealed container 12 via a liquid recovery flow path 54 formed of, for example, a metal pipe member or the like. The bottom of the closed space S2 of the recovery unit 50 is provided lower than the position of the outlet 16 of the closed container 12, and the liquid level WL of the liquid recovered in the closed space S2 is always lower than the outlet 16. The liquid on the outlet side is allowed to flow smoothly and naturally to the recovery unit side. In addition, the collection | recovery part 50 is provided with the extraction drain 56 of the collect | recovered liquid, and it is provided so that it may be opened and closed by an on-off valve.

  The natural flow recovery mechanism 52 is a natural flow recovery means for causing only the liquid to flow down from the outlet to the recovery unit 50 by the natural flow due to the gravity of the liquid accumulated in the closed vessel 12. The natural downflow recovery mechanism 52 is configured to include the liquid recovery flow path 54, and the liquid recovery flow path 54 is branched from the discharge path R1 of the processed raw material by connecting the liquid inlet 58 to the discharge port 16 in communication. A liquid recovery path R2 is formed. In the present embodiment, the liquid recovery flow path 54 is, for example, a metal pipe having an inner diameter of about 6 mm. The liquid recovery flow channel 54 is provided with an open / close mechanism 60 that selectively switches the communication state of the flow channel. The opening / closing mechanism 60 is switched so as to shut off the flow path during processing of the raw material in the sealed container and to connect the flow path when only the liquid is separated and recovered after the processing. As a result, water and steam contained in the raw material are liquefied simultaneously with the raw material, and bacteria, malodorous components and the like in the raw material can be treated with the high-temperature and high-pressure steam. And the liquid separated and collected after the treatment can be recovered in a state where the sterilization, the offensive odor, the decomposition of harmful components, etc. can be performed, and the separated and collected liquid does not need to be secondarily treated, and labor is not required. Time can be shortened.

  In the liquid recovery flow channel 54, the liquid inlet 58 is communicatively connected to a position on the discharge upstream side of the opening / closing mechanism 26. Therefore, in the state where the opening and closing mechanism 26 of the discharge port 16 is closed, the opening and closing mechanism 60 of the liquid recovery flow channel 54 is opened to bring the flow path into communication, thereby separating and recovering the liquid from the discharge port. The liquid recovery flow path 54 is connected in the orthogonal direction to the discharge cylinder 36, and the liquid recovery path R2 is provided in the orthogonal direction to the discharge path R1 of the raw material. That is, in the closed state of the opening / closing mechanism 26, the liquid flows in the direction crossing the direction in which the deposition pressure of the raw material in the closed container is applied. As a result, the raw material does not easily enter the liquid inlet 58 with a simple structure, and only the liquid is allowed to flow naturally to the liquid recovery passage 54, whereby the liquid can be separated and recovered favorably. It should be noted that if the force in the liquid in the closed container 12 flows to the liquid inlet 56 is too strong, the raw material may flow together due to the force of the liquid flow, so preferably the processed raw material is not carried away The connection configuration such as the liquid recovery path and the liquid inlet is set so as to be a moderate flow. The liquid recovery flow path 54 is provided entirely horizontally from the communication side (liquid inlet side) with the discharge port 16 toward the recovery unit side. As a result, the flow of the liquid in the liquid recovery flow path is smoothly performed, and is naturally flowed down from the discharge port to the recovery unit. The liquid recovery flow path 54 may be inclined downward toward the recovery unit side so that the flow of the liquid can be made to flow more smoothly in the liquid recovery path 54. At this time, for example, the liquid inlet 58 side may be provided horizontally to a certain length, and then may be inclined downward. In addition, a filter or the like may be provided in the liquid inlet 58 as necessary.

  Furthermore, as shown in FIG. 1, the natural flow down mechanism 52 forms the same pressure forming means 62 for forming the closed space S1 of the closed container 12 and the closed space S2 of the recovery unit 50 at the same pressure before the liquid recovery operation. Including. Normally, since the inside of the sealed container 12 after treatment is at a high pressure, in the liquid recovery flow path, a pumping force by a pressure difference works toward the closed space S2 of the recovery unit which is lower in pressure than the inside of the sealed container. When such pumping force works, both the liquid and the raw material flow into the liquid recovery channel 54, which makes it difficult to separate and recover the liquid and the raw material, and there is a high possibility that the raw material may be clogged in the liquid recovery channel. . By setting the two closed spaces S1 and S2 of the closed vessel 12 and the recovery unit 50 to the same pressure before the liquid recovery operation by the same pressure forming means 62, the difference in air pressure between the two closed spaces S1 and S2 It is possible to prevent the raw material produced by the pressure-feeding from being pumped, and it is possible to recover the raw material in the recovery part well while separating it from the raw material by utilizing the natural flow down action of the liquid. In addition, since the separation and recovery operation can be performed even in a high pressure state in the sealed container after processing, the operation time can be shortened.

  The same pressure forming means 62 separates the closed space S1 of the closed container 12 and the closed space S2 of the recovery unit 50 by another route R3 different from the liquid recovery route R2 (liquid recovery channel 54) through the discharge port 16 It includes the same pressure communication pipe 64 to be communicated. The same pressure communication pipe 64 is, for example, a metal pipe, and can make the two closed spaces S1 and S2 have the same pressure with a simple structure and efficiently. In FIG. 1, one end of the pressure communication pipe 64 is communicatively connected to the upper end side of the left and right central portion of the sealed container 12, and the other end is communicatively connected to the upper end side of the recovery unit 50. Communication between the pressure communication pipe 64 forming another path R3 and the sealed container 12 is performed via the communication connection portion 68 set on the upper end side of the sealed container 12. The connection port of the communication connection portion 68 with the closed container is set downward. As a result, the raw material deposited in the sealed container 12 in the pressure communication pipe 64 is less likely to enter the pipe, and clogging of the raw material in the pipe is prevented, and the communication state of the pressure communication pipe is maintained. The sealed container 12 and the recovery unit 50 can be reliably brought to the same pressure. The same pressure communication pipe 64 is always in communication, and when the opening / closing mechanism 60 of the liquid recovery flow path 54 is closed, the pressure in the closed container 12, the recovery unit 50, and the liquid recovery flow path 54 is the same. Become. As a result, even immediately after the opening / closing mechanism 60 of the liquid recovery flow channel 54 is opened, the pressure feed of the raw material due to the pressure difference can be prevented on the liquid inlet 58 side of the discharge port 16. Furthermore, even when the open / close mechanism 60 is opened and the liquid is recovered, the pressure in the closed container 12 and the interior of the recovery unit 50 are always maintained at the same pressure. Therefore, the same pressure state is obtained from before collection to the end of collection, and only the liquid can be allowed to naturally flow down from the discharge port 16 and separated and collected. The same pressure forming means 62 is not limited to the configuration of this embodiment, but may have any configuration. For example, the same pressure forming means 62 is provided with another high pressure forming device for making the inside of the recovery unit high pressure, and the pressure in the recovery unit is adjusted while monitoring the pressure in the closed container with a sensor. You may make it pressure. In addition, the inside of the sealed container may be depressurized.

Next, a method for producing a fulvic acid solution according to an embodiment of the present invention using the production apparatus 10 described above will be described.
A method for producing a fulvic acid solution according to an embodiment of the present invention comprises an apparatus preparing step of preparing a processing apparatus as described above,
A raw material charging step of charging a raw material containing wood chips as a main material from the supply unit (input port) into the treatment space of the sealed container of the treatment apparatus;
The raw material is stirred while introducing the steam having a temperature of 120 to 250 ° C. and a pressure of 12 to 35 atm into the processing space into which the raw material is charged, and the raw material is subjected to a hydrothermal reaction treatment to obtain Fulvo A process of obtaining a mixed solution containing a suspension of acid and humic acid and wood chips and / or fragments thereof, and
A fulvic acid solution acquiring step of separating the fulvic acid from the obtained mixed solution to obtain a fulvic acid solution is provided.

Hereinafter, each of the above-described steps will be described in detail.
<< Device preparation process >>
The manufacturing apparatus (processing apparatus) as described above is prepared with reference to the drawings.

Raw material input process
Raw materials are mainly wood chips. The chip preferably has a long side of about 50 to 150 cm and a short side 2 of about 5 cm. As a side material or additive, an alkaline solution can be added to efficiently generate more fulvic acid. The pressure and temperature of the steam when adding the alkaline solution may be the same as when not adding it.

Generally, harvested wood or waste wood can be used as the wood.
As said felling material, any of a hardwood and a softwood may be sufficient.
The hardwood may be any hardwood, but at present, eg, birch, willow, chestnut, nara or beech are preferably used.
At present, for example, pine, cedar, Japanese cypress or Asunaro can be preferably used as the conifer.
In addition, it is not necessary to remove skin, a leaf, etc. when using felling material.

Examples of the waste materials include wood chips (square bars, plate materials: solid wood, laminated materials, plywood materials (veneer board)) and the like that are generated during the demolition of a wooden building house. Since such wood chips are usually made into chips, they can be used as they are as raw materials.
The above raw materials may be mixed and used. For example, when logging is carried out in a normal household, various types of harvested wood are discharged, but they may be used as chips as they are as a whole and mixed as raw materials without sorting. Of course, waste chips may be mixed therein.

  Although the raw material which is the chip as described above is introduced into the processing space, the amount of the raw material is preferably 90% or less, particularly 50 to 80%, of the closed space S1 of the closed container 12, ie the processing space. If the input amount of the raw material is lower than this range, the processing efficiency is poor, and if it exceeds, the steam may not work well on the raw material, and the formation of fulvic acid may not be sufficient.

<< Processing process >>
In this step, steam is introduced into the processing space into which the raw material is charged. The steam is at a temperature of 120 to 250 ° C. and a pressure of 12 to 35 atm. The amount of steam introduced depends on the volume of the processing space and the amount of raw material to be treated, but the amount to be completely filled in the surplus space (the space obtained by subtracting the volume of the raw material fed from the processing space) Is preferred.

When using a hardwood as said felling material, it is preferable that the pressure of the said vapor | steam in a treatment process shall be 12-25 atm.
When using a softwood as said felling material, it is preferable that the pressure of the said steam in a treatment process shall be 12-25 atm.
In this treatment step, as described above, the raw material is stirred while introducing the steam into the treatment space into which the raw material is charged, and the raw material is treated with subcritical water reaction.
The processing time is preferably 1 to 12 hours. When the treatment time is shorter than the above range, the reaction time is not sufficient, that is, the formation of fulvic acid is not sufficient and a considerable amount of fulvic acid remains in the raw material, and when the above range is exceeded, It will be carbonized as raw material, and it will be lost in useful things for agriculture and livestock production.
The temperature in the processing space in this processing step varies depending on the type and condition of the raw material used, but the pressure is kept at 12 to 35 atm at 120 to 250 ° C.
In this treatment step, the raw material is subjected to subcritical water reaction treatment, and fulvic acid and humic acid are contained in the solution. The solution also contains a suspension of wood chips and / or debris thereof. That is, a mixed solution containing a suspension of fulvic acid, humic acid, and wood chips and / or fragments thereof is obtained.
The mixed solution obtained in this step contains 3 to 12% of fulvic acid based on the total amount (in solid content) of fulvic acid and humic acid.

<< Cooling process >>
A cooling step may be performed after the treatment step. In this cooling step, the inside of the processing space is cooled, that is, the steam is cooled to obtain a solution containing fulvic acid and humic acid. This cooling is usually performed by natural cooling.

<< Fulvic Acid Solution Acquisition Process >>
In this step, humic acid and fulvic acid are separated from the mixed solution obtained in the previous treatment step (which may be followed by a cooling step) to obtain a fulvic acid solution.
The separation treatment of the humic acid and the fulvic acid in the fulvic acid solution acquiring step is carried out by making the pH of the solution acidic so as to separate the humic acid by precipitation or by filtration.
The pH of the solution is preferably 2-3.

[Example]
First, a processing apparatus having a structure as shown in FIG. 1 was prepared, wherein the volume of the processing space in the closed vessel was 2 m ³ .
In the said processing space, experiment of manufacture of a fulvic acid solution was conducted respectively using a birch felled wood chip (Example 1) and a willow felled wood chip (Example 2) as a raw material.
The size of the chip was about 10 cm on average in the long side in both cases.
The input amount was the same in both cases, and was 1.6 m ³ (80% of the volume of the processing space).
After introducing the raw material, while introducing a steam having a temperature of 250 ° C. and a pressure of 25 atm into the processing space, stirring was performed by a stirring unit to perform subcritical water reaction treatment with the steam of the raw material. The processing time was 1 hour for both raw materials.
The state in the processing space in this processing step was a temperature of 250 ° C. and a pressure of 25 atm in the holding step of the processing step.
After the treatment, the treatment space was conducted to the atmosphere to make the inside of the treatment space at the atmospheric pressure, and then only the mixed solution was taken out from the treatment apparatus.

Thereafter, the mixed solution was analyzed by the following method to confirm the presence of fulvic acid and the like. The results are shown in Table 1 below.

Analysis item Total organic carbon (TOC): JIS K 0102 (2016) 22.1 Combustion oxidation-Infrared type TOC analysis Humic substance (quantification of fulvic acid, humic acid): Three-dimensional spectrofluorimetry

Analysis method 1) Extraction of alkaline solubles The sample was placed in a centrifuge tube and centrifuged at 3000 rpm for 10 minutes. The supernatant was neutralized with NaOH, and then the NaOH solution was added to the solution so as to be equivalent to a 0.1 M NaOH solution to extract an alkali-soluble matter. The solution was filtered with a GF / F filter, and the filtrate was used as a test solution.

2) Fractionation of fulvic acid and humic acid Fractionation was carried out based on the following definition of the test solution prepared with 1)

<Definition of humic substance fraction>
The samples of Examples 1 and 2 are made alkaline with a NaOH solution, and the filtered solution is acidified by adding hydrochloric acid to be precipitated, which is defined as humic acid, and the one as it is dissolved is defined as fulvic acid.

Measurement of TOC TOC was measured on the test solution extracted in 1) and the solution of fulvic acid and humic acid fractionated in 2).

Three-dimensional fluorescence spectra were measured for the test solution extracted in 1) and the solution of fulvic acid and humic acid fractionated in 2). From the three-dimensional fluorescence spectrum obtained by measuring between the excitation wavelength (Ex) 200 to 500 nm and the fluorescence wavelength (Em) 210 to 550 nm, based on the sum of the fluorescence intensity in the wavelength range where humic substances exhibit fluorescence, Normalized and quantified values were obtained using fulvic acid and stage humic acid (Distributed by the Japanese Society of Plant Humor Science).

Analysis Results The analysis results obtained are shown in Tables 1 to 5 according to the above analysis method. Moreover, the three-dimensional excitation-fluorescence spectrum of the sample and the standard substance is shown in FIGS.
The soluble TOC is 44000 mg / L for white rattan chip and 35000 mg / L for willow chip, and the TOC after fulvic acid fractionation is 41000 mg / L for white rattan chip and 34000 mg / L for willow chip, almost the whole amount of fulvic acid It was a fraction. When converted to carbon content (47.57%) of staged fulvic acid, the values shown in Table 2 are obtained, but when looking at the three-dimensional fluorescence spectrum, the fluorescence wavelength (Em) 300 nm, strong fluorescence near excitation wavelengths 220 nm and 270 nm Is considered to be lower than this value.
The converted values of the fulvic acid fraction from the three-dimensional fluorescence measurement results were 7400 mg / L for the white rat tip and 4600 mg / L for the willow chip. These are values when it is premised that the humic substance contained in the sample has the same fluorescence characteristics as that of the staged fulvic acid.
Almost all of the solution to be obtained as a fulvic acid solution was a fulvic acid solution.
From the above, the effects of the present invention are clear.

  Moreover, about the pine and the cedar which is a conifer, it tested on the same conditions except having made processing temperature and pressure high compared with the case of a broadleaf tree. More fulvic acid was obtained compared to the hardwood case.

DESCRIPTION OF SYMBOLS 10 Organic waste processing apparatus 12 Sealed container 14 Vapor ejection means 16 Discharge port 18 Separation collection means 26 Opening / closing mechanism 30 Stirring means 50 Collection part 52 Natural flow collection mechanism 54 Liquid recovery flow path 58 Liquid inlet 60 Opening / closing mechanism 62 Same Pressure forming means 64 Same pressure communicating pipe

The above object is achieved by the production how the fulvic acid solution of the present invention the structure of the following (1) to (13).
(1)
An enclosed container having a process space closable therein, a vapor ejection means for ejecting high-temperature high-pressure vapor into the enclosed container, an opening / closing mechanism, and a supply unit for supplying a raw material into the enclosed container An apparatus preparing step of preparing a processing apparatus having an opening / closing mechanism, and a discharge unit for discharging the processing solution generated by the processing of the raw material by the steam to the outside;
A raw material charging step of charging a raw material containing wood chips as a main raw material from the supply unit into the treatment space of the closed container of the treatment apparatus;
The raw material is subjected to a subcritical water reaction process while stirring the raw material while introducing a steam having a temperature of 120 to 250 ° C. and a pressure of 12 to 35 atm into the processing space into which the raw material is charged. A process of obtaining a mixed solution containing a suspension of fulvic acid, humic acid and wood chips and / or fragments thereof;
A process for producing a fulvic acid solution, comprising: a fulvic acid solution acquiring step of separating the fulvic acid from the acquired mixed solution to acquire a fulvic acid solution.
(2)
The manufacturing method of the fulvic acid solution of said (1) whose said wood is felled wood or waste wood.
(3)
The manufacturing method of the fulvic acid solution of said (2) whose said felling material is a hardwood or a softwood.
(4)
The method for producing a fulvic acid solution according to (3) above, wherein the hardwood is white oak, willow, chestnut, nara or beech.
(5)
The manufacturing method of the fulvic acid solution of said (3) whose said conifer is a pine, a cedar, a Japanese cypress or a morning sun.
(6)
The manufacturing method of the fulvic acid solution of said (2) whose said waste materials are solid wood or a plywood material.
(7)
The manufacturing method of the fulvic acid solution in any one of said (1)-(6) the said process process is performed for 1 to 8 hours.
(8)
The method for producing a fulvic acid solution according to (3), wherein the main raw material is a hardwood and the pressure of steam introduced in the treatment step is 12 to 25 atm.
(9)
The method for producing a fulvic acid solution according to (3), wherein the main raw material is softwood and the pressure of steam introduced in the treatment step is 20 to 35 atm.
(10)
The manufacturing method of the fulvic acid solution in any one of said (1)-(9) which introduce | transduces a raw material 90% or less of the said process space with a volume ratio.
(11)
The manufacturing method of the fulvic acid solution in any one of said (1)-(9) which introduce | transduces a raw material 50 to 80% of the said process space by a volume ratio.
(12)
The manufacturing method of the fulvic acid solution in any one of said (1)-(11) the stirring in the said process process is performed by the rotating stirring member arrange | positioned in the said process space.
(13)
The manufacturing method of the fulvic acid solution in any one of said (1)-(12) which adds an alkaline solution as an additive in the said raw material injection | throwing-in process.

Claims (15)

An enclosed container having a process space closable therein, a vapor ejection means for ejecting high-temperature high-pressure vapor into the enclosed container, an opening / closing mechanism, and a supply unit for supplying a raw material into the enclosed container An apparatus preparing step of preparing a processing apparatus having an opening / closing mechanism, and a discharge unit for discharging the processing solution generated by the processing of the raw material by the steam to the outside;
A raw material charging step of charging a raw material containing wood chips as a main raw material from the supply unit into the treatment space of the closed container of the treatment apparatus;
The raw material is subjected to a subcritical water reaction process while stirring the raw material while introducing a steam having a temperature of 120 to 250 ° C. and a pressure of 12 to 35 atm into the processing space into which the raw material is charged. A process of obtaining a mixed solution containing a suspension of fulvic acid, humic acid and wood chips and / or fragments thereof;
A process for producing a fulvic acid solution, comprising: a fulvic acid solution acquiring step of separating the fulvic acid from the acquired mixed solution to acquire a fulvic acid solution.   The method for producing a fulvic acid solution according to claim 1, wherein the wood is harvested wood or waste wood.   The method for producing a fulvic acid solution according to claim 2, wherein the harvested material is hardwood or softwood.   The method for producing a fulvic acid solution according to claim 3, wherein the hardwood is white oak, willow, chestnut, nara or beech.   The method for producing a fulvic acid solution according to claim 3, wherein the conifer is pine, cedar, cypress or asuna.   The method for producing a fulvic acid solution according to claim 2, wherein the waste material is solid wood or plywood.   The method for producing a fulvic acid solution according to any one of claims 1 to 6, wherein the treatment step is performed for 1 to 8 hours.   The method for producing a fulvic acid solution according to claim 3, wherein the main raw material is a hardwood and the pressure of steam introduced in the treatment step is 12 to 25 atm.   The method for producing a fulvic acid solution according to claim 3, wherein the main raw material is softwood, and the pressure of steam introduced in the treatment step is 20 to 35 atm.   The method for producing a fulvic acid solution according to any one of claims 1 to 9, wherein 90% or less of the processing space is introduced with the raw material in a volume ratio.   The method for producing a fulvic acid solution according to any one of claims 1 to 9, wherein 50% to 80% of the processing space is introduced as a raw material in a volume ratio.   The method for producing a fulvic acid solution according to any one of claims 1 to 11, wherein the stirring in the treatment step is performed by a rotating stirring member disposed in the treatment space.   The method for producing a fulvic acid solution according to any one of claims 1 to 12, wherein an alkaline solution is added as an additive in the raw material charging step.   A fulvic acid solution produced by the method for producing a fulvic acid solution according to any one of claims 1 to 13.   The useful thing for agricultural and livestock products containing the solid content obtained by the manufacturing method of the fulvic acid solution in any one of Claims 1-13.