JP2011245410A - Device and method for supplying pressurized container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent incorrect detection of formation of a filled object, increase in power requirement, and a blockage.SOLUTION: The problem is solved by a pressurized container supplying device 30 including: a material sealing feeder which continuously supplies a solid-liquid mixture material to a pressurized container 4 through a supplying pipe 32 while forming a filled object P formed by airtightly filling the material to the supplying pipe 32 to shield the upstream pressure of the supplying pipe 32 from the downstream pressure with the filled object P; a back pressure valve 40 disposed on the downstream side in the filled area 32z of the filled object P in the supplying pipe 32 of the feeder; a cylinder 42 of the back pressure valve 40; an intermediate state detecting device which detects whether a valve member 41 of the back pressure valve 40 is in an intermediate state between closed state and open state; a controller which controls the cylinder 42 to open the back pressure valve 40 when the intermediate state detecting device detects that the valve member 41 of the back pressure valve 40 is in the intermediate state.

Description

  The present invention relates to a pressurized container supply technology that employs a material seal type feeder that continuously supplies a solid-liquid mixed raw material consisting of liquid and solid contents into a pressurized container, and in particular, hydrolysis reaction of woody biomass The present invention relates to a pressurized container supply technique suitable for application to a pressurized reaction container.

When continuously supplying a solid-liquid mixed material consisting of liquid and solid content such as a mixture of solid and water, high-concentration slurry, etc., to a reactor, in general, pushing in a single screw pump, screw feeder, piston feeder, etc. A mold feeder is used. In particular, the feeder for the reactor under pressure is required to push the raw material while sealing the reactor internal pressure. As a feeder satisfying such requirements, the raw material is compressed while passing through the supply passage to form a raw material filling body, and this filler (plug) is pushed in while blocking its upstream side and downstream side. There are material seal type screw feeders and piston feeders. Hereinafter, these are collectively referred to as a material seal type feeder.
In such a material seal type feeder, a back pressure valve is provided adjacent to the downstream side of the filling region of the filling body in order to promote the formation of the filling body while shutting off the upstream side pressure and the downstream side pressure at the start of raw material supply. As soon as the filling body is formed, the back pressure valve is opened, and after that, the filling body is supplied to the pressure vessel in order from the downstream side, while the raw material is replenished upstream to maintain the filling body. It has become. Further, at this time, it is common to determine whether or not the filler is formed by detecting an index of frictional resistance of the raw material supply (for example, a current value or a thrust force of the feeder).

JP-T57-500091 JP 2004-89016 A JP 2004-337099 A JP-A-6-109227 JP-A-9-183516 JP 2007-211096 A JP 2006-068606 A JP 2006-281037 A JP 2004-121055 A

However, the conventional filling detection may be erroneously detected when the frictional resistance of the raw material supply changes regardless of the formation of the seal portion, such as when the properties of the raw material change or the wear of the machine progresses.
In addition, since the conventional filling detection is based on an indirect index of friction resistance of the raw material supply, the reaction to the formation of the filling body becomes slow, and the state in which both the filling body and the back pressure valve become the raw material supply load is unsatisfactory. Since it continued to be necessary, the required power increased, and there was also a risk that the filler was blocked in the supply pipe line.
Therefore, a main problem of the present invention is to prevent erroneous detection of formation of a filling body, increase in required power, and blockage.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
The solid-liquid mixed raw material is continuously supplied into the pressurized container through the supply pipe, and a filling body is formed by hermetically filling the raw material in the supply pipe, and this filling body forms an upstream of the supply pipe. A material seal type feeder that supplies the raw material while blocking the side pressure and the downstream pressure,
A back pressure valve provided on the downstream side of the filling region of the filler in the feeder supply line;
An opening / closing drive for the back pressure valve;
A pressurized container supply device comprising:
Intermediate state detection means for detecting whether or not the valve body of the back pressure valve is in an intermediate state between a closed state and an open state;
A control device for performing control to open the back pressure valve by the opening / closing drive device when it is detected by the intermediate state detection means that the valve body of the back pressure valve is in the intermediate state;
A pressurized container supply device comprising:

(Function and effect)
In a supply device in which such a material seal type feeder is provided with a back pressure valve, when the raw material filling body is formed, the valve body of the back pressure valve is pushed open by the raw material filling body. Therefore, by providing an intermediate state detection means for detecting whether or not the valve body of the back pressure valve is in the intermediate state between the closed state and the open state, the reaction can be performed directly regardless of the friction resistance of the raw material supply. The formation of the filler can be detected well. Therefore, it is possible to prevent erroneous detection of the filling body formation, increase in required power, and blockage.

<Invention of Claim 2>
The intermediate state detection means is a closed limit switch that is turned on / off depending on the moving force of the valve body of the back pressure valve when the valve body of the back pressure valve is in the closed state and when in the intermediate state. The pressurized container supply device according to claim 1.

(Function and effect)
Such an intermediate state detecting means using a limit switch is preferable because it can be implemented with a simple device configuration and is directly and reliably detected.

<Invention of Claim 3>
The feeder includes the supply pipe configured so that the inner diameter gradually decreases toward the filling region of the filler, a screw installed in the supply pipe along the pipe axis direction, and the screw. A plug screw feeder equipped with an electric motor for rotational driving,
In addition to the intermediate state detection means, it comprises at least one auxiliary detection means of the following (A) to (C):
(A) a torque detector for detecting the torque of the screw shaft;
(B) a thrust force detector for detecting a thrust force of the screw shaft;
(C) a current detector for detecting the current of the motor;
When the detected value by the auxiliary detecting means is equal to or greater than a predetermined value and the intermediate state detecting means detects that the valve body of the back pressure valve is in the intermediate state, the control device uses the opening / closing drive device. Control to open the back pressure valve,
The pressurized container supply apparatus according to claim 1 or 2.

(Function and effect)
As the material seal type feeder, a screw feeder using an electric motor as a drive source is suitable. In such a screw feeder, the friction resistance of the raw material supply and the torque of the screw shaft, the thrust force or the electric current of the electric motor have a correlation, and the formation of the raw material filler and the friction resistance of the raw material supply have a correlation. . That is, the torque of the screw shaft, the thrust force or the electric current of the electric motor and the formation of the raw material filler have a correlation. Therefore, when using the material seal type screw feeder, at least one of the torque of the screw shaft, the thrust force, and the electric current of the motor is supplementarily detected, and the result is combined with the detection result of the intermediate state detection means of the valve body. Therefore, it is possible to detect the formation of the filler with higher accuracy.

<Invention of Claim 4>
A seal leak detecting means for detecting whether or not the filler has a seal leak;
2. The pressurized container supply device according to claim 1, wherein the control device performs control for closing the back pressure valve when it is detected by the seal leakage detection means that the filler has leaked. 3.

(Function and effect)
Since the differential pressure between the upstream pressure and the downstream pressure is applied to the filling body, the filling body may collapse or cause seal leakage when the raw material is insufficiently filled or heterogeneous. . Therefore, it is preferable to close the back pressure valve in order to detect such a situation as described above and promote the formation of the filler again. When the filling body is formed, the back pressure valve is automatically opened by the above-described control of the present invention, and can be smoothly returned to the steady operation.

<Invention of Claim 5>
The seal leak detection means is an internal pressure gauge that measures the internal pressure of the pressurized container, and the control device controls the closing of the back pressure valve when a measured value by the internal pressure gauge decreases by a predetermined value or more within a predetermined time. The continuous supply type reactor according to claim 4, wherein

(Function and effect)
The seal leak detection means can be determined as appropriate, but the supply destination of the raw material is a pressurized container, and such a pressurized container is usually provided with an internal pressure gauge, and the seal leak is a rapid decrease of the internal pressure. Therefore, as described above, it is desirable to perform control to close the back pressure valve when the internal pressure of the pressurized container is rapidly reduced.

<Invention of Claim 6>
The pressurized container has an internal temperature higher than the temperature upstream of the filler,
The seal leakage detection means is an upstream exhaust thermometer that measures an exhaust temperature upstream of a filling region of the filler in the supply pipe line, and a measured value by the upstream exhaust thermometer exceeds a predetermined temperature. The pressurization container supply device according to claim 4 or 5 which performs control which closes said back pressure valve when it raises.

(Function and effect)
When the pressurized container is a container that reacts at a high temperature, the internal temperature of the pressurized container may be higher than the temperature on the upstream side of the filler. In such a case, if the seal leakage of the filling body occurs, the temperature on the upstream side of the filling body rises. Therefore, when the temperature of the exhaust port on the upstream side of the filling body rises as described above, the back pressure valve closing control is performed. It is also a preferable form to perform.

<Invention of Claim 7>
The control device opens the back pressure valve when the back pressure valve is closed by detecting the seal leak of the filler, even when the intermediate state detecting means detects that the intermediate state is detected until a predetermined time elapses thereafter. The pressurization container supply apparatus of any one of Claims 4-6 which performs what control is not performed.

(Function and effect)
If a certain amount of time is required when closing the back pressure valve due to seal leak detection, an intermediate state of the back pressure valve may be detected during that time and control to open the back pressure valve may be performed. In this case, since the seal leak is not improved, the control for closing the back pressure valve again is performed by detecting the seal leak again, and as a result, the back pressure valve may be repeatedly opened and closed. Therefore, as described above, when the back pressure valve is closed by detecting the seal leak of the filler, control is performed so that the back pressure valve is not opened even when the intermediate state detecting means detects that the intermediate state is in the intermediate state until a predetermined time elapses thereafter. It is preferred to do so. As a result, a situation in which the back pressure valve repeatedly opens and closes can be prevented.

<Invention of Claim 8>
The solid content of the raw material is woody biomass, the pressure vessel is a pressure reaction vessel that performs a hydrolysis reaction between the woody biomass and dilute sulfuric acid, and the liquid content of the raw material is water. The pressurization container supply apparatus of any one of these.

(Function and effect)
In the hydrolysis of woody biomass raw material in such a pressurized container, the raw material solids are often coarse and heterogeneous, so it is relatively difficult to form a packing at the beginning of raw supply, Since there is also a certain pressure difference between the upstream side and the downstream side of the body, seal leakage is likely to occur. Therefore, this invention is suitable when supplying a raw material to the pressurized reaction container which hydrolyzes the raw material containing such a woody biomass in presence of dilute sulfuric acid.

<Invention of Claim 9>
While the solid-liquid mixed raw material is continuously supplied into the pressurized container, a filling body of the raw material is formed in the supply pipe line, and the upstream side pressure and the downstream side pressure of the supply pipe line are blocked by the filling body. A method of supplying the raw material,
A back pressure valve is provided on the downstream side of the filling region of the filling body in the supply pipeline,
Opening the back pressure valve when the valve body of the back pressure valve is in an intermediate state between a closed state and an open state;
A pressurized container supply method characterized by the above.

(Function and effect)
The same effect as that of the first aspect of the invention can be achieved.

  As described above, according to the present invention, it is possible to prevent erroneous detection of the filler formation, increase in required power, and blockage.

It is a flowchart of the example of woody biomass ethanol equipment. It is the schematic which shows the principal part of a saccharification reaction apparatus. It is a principal part expanded longitudinal cross-sectional view of a container supply apparatus. It is a flowchart of a control apparatus. It is a principal part expanded longitudinal cross-sectional view of a container supply apparatus. It is a principal part expanded longitudinal cross-sectional view of a container supply apparatus. It is a principal part expanded longitudinal cross-sectional view of a container supply apparatus. It is a principal part expanded longitudinal cross-sectional view of a container supply apparatus.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows that woody biomass (solid content) such as bagasse, rice husk, rice straw, and wood chips (including waste building materials) is washed by the washing machine 2, and then dehydrated to a moisture content of about 80 to 85% by weight with the dehydrator 3. After that, the saccharification reaction apparatus 1 that generates C5 saccharides such as glucose, xylose, arabinose, galactose, and mannose by hydrolysis with a dilute sulfuric acid catalyst in the pressurized vessel 4 and the liquid fraction of the product by the saccharification reaction apparatus 1 It is collected by a filtration device 11 such as a horizontal belt filter, neutralized by adding slaked lime in a neutralization tank 12, and then ethanol-converted by an ethanol-fermenting Escherichia coli in a fermentation tank 13, a concentrator 14, a distillation tower 15, and a dehydrator 16. The example of the woody biomass ethanol installation which has the ethanol conversion apparatus 10 which collect | recovers ethanol via is shown. In this example of equipment, the hydrolysis residue (cellulose, lignin), which is a solid content recovered by the filtration device 11, is used as, for example, boiler fuel or compost.

  The main part of the saccharification reaction apparatus 1 is shown in detail in FIG. That is, the solid-liquid mixed raw material dehydrated by the dehydrator 3 is first continuously and quantitatively cut out by the raw material supply device 20 including a screw feeder and supplied to the container supply device 30 including the material seal type feeder and the back pressure valve 40. Then, this container supply device 30 supplies the pressurized container 4 as a reactor. In the pressurized container 4, a mixture of steam and dilute sulfuric acid sprayed from a nozzle 31n provided on the upper part of the discharge pipe 31 of the container supply apparatus 30 is supplied together with the raw material from the supply port 4i. Steam plays the role of maintaining the reaction temperature. Along with or in place of the dilute sulfuric acid supply to the pressurized container 4, dilute sulfuric acid may be mixed with the raw material in advance upstream of the container supply device 30 to promote permeation of sulfuric acid into the raw material solids. A screw type agitating / conveying device 4w is installed in the pressurized container 4 along the direction from the supply port 4i side to the discharge port 4x side, and the raw material supplied into the pressurized container 4 is agitated and conveyed. In the process of being stirred and transported by the apparatus 4w, it is held in the pressurized container 4 for a predetermined time, and after hydrolysis proceeds and saccharides are produced, they are discharged as reactants.

  Details of the container supply device 30 are shown in FIG. This container supply device 30 includes a material seal type feeder provided with a discharge conduit 31 along the vertical direction communicating with the supply port 4i of the pressurized container 4 and a supply conduit 32 communicating with the side wall of the discharge conduit 31. A back pressure valve 40 that opens and closes the front end discharge port 32x in the supply pipe line 32 as a valve seat and a cylinder 42 as an opening and closing drive device for the back pressure valve 40 are provided.

  More specifically, the illustrated material seal type feeder is a so-called plug screw feeder. The feeder supply pipe 32 has a shape extending in the lateral direction, and has a supply port 32i at the upper part on the base end side and a discharge port 32x at the distal end surface, and 32x from the supply port 32i to the discharge port. It has a reduced diameter area 32y whose inner diameter is reduced as it goes, and a filling area 32z having an inner diameter equal to or smaller than the reduced diameter area 32y adjacent to the distal end side of the reduced diameter area 32y. The reduced diameter region 32y has a double tubular shape, and a large number of through-holes (not shown) are formed in the peripheral wall of the inner tube 32i almost entirely, and an exhaust port 32e is discharged above the outer tube 32c and drained at the lower portion. Each port 32d is provided. A screw shaft 33 is concentrically mounted in the supply pipe line 32 and is configured to be rotationally driven by a rotational drive source 34 formed of an electric motor. Of course, the material seal type feeder of the present invention is not limited to this example. For example, although not shown, a material seal type piston feeder that employs material pushing by a piston instead of pushing the material pushing by the screw described above is used. You can also.

  The back pressure valve 40 includes a conical valve body 41 that opens and closes the tip discharge port 32x of the supply pipe line 32, and a cylinder 42 that advances and retracts the valve body 41 in a direction opposite to the tip discharge port 32x of the supply pipe line 32. It is what it has. The valve body 41 has a support shaft 43 that protrudes rearward. The support shaft 43 penetrates the side wall of the discharge pipe 31 and protrudes to the outside of the discharge pipe 31, and is attached to the outer surface of the discharge pipe 31. The cylinder 42 is connected in series to the telescopic shaft. Therefore, when the valve body 41 is in the closed position, the valve body 41 is urged in the closing direction by the internal pressure of the cylinder 42.

  Characteristically, a collar is attached to a portion of the valve body support shaft 43 that protrudes outside the discharge pipe 31 to form a contact portion 44, and this contact is made when the valve body 41 is in a closed state. The closed limit switch 50 is mounted at a position where the contact portion 44 is turned on without being in contact with the contact portion 44 when the contact portion 44 is turned on and the valve body 41 is in an intermediate state between the closed state and the open state. ing. Further, in this example, when the valve body 41 is in the open state, the contact portion 44 comes into contact and is turned on, and when the valve body 41 is in an intermediate state between the closed state and the open state, An open limit switch 51 is also attached at a position where the contact portion 44 is turned off without contact. As long as the position of the valve body 41 can be detected, other known detectors such as a non-contact type sensor can be used instead of the limit switches 50 and 51 of this example.

  Characteristically, the container supply device 30 includes a control device (not shown) that performs back pressure valve opening / closing control according to the flowchart shown in FIG. That is, when starting the supply of raw materials in the container supply device 30, first, the back pressure valve 40 is closed by the cylinder 42, and then the screw shaft 33 is started to transfer the solid-liquid mixed raw material M to the front end side. As shown in FIG. 5, the discharge port 32x of the supply line 32 is closed by a back pressure valve 40, and not only the pressure but also the movement of the raw material M is blocked by the valve body 41. The solid-liquid mixed raw material M is filled, and the raw material M is strongly compressed in order from the front end side of the supply pipe line 32 by the pushing force by the subsequent raw material M and the inner diameter reduction in the reduced diameter region 32y. When this compression proceeds to a certain extent, after the raw material is hermetically filled in the filling region 32z as shown in FIG. 6 to form the filling body P, the filling body P is used as the valve body of the back pressure valve 40 as shown in FIG. The valve element 41 is pushed open against the pressing force of 41. At this time, when the contact portion 44 of the valve body support shaft 43 is separated from the closed limit switch 50, it is detected that the closed limit switch 50 is turned off and the valve body 41 is in an intermediate state. When the intermediate state is detected, the control device determines that the filler P has been formed, and performs control to open the back pressure valve 40 as shown in FIG. Since the detection of this intermediate state is directly related to the formation of the filler P regardless of the frictional resistance of the raw material supply M, the formation of the filler P is accurately detected. Therefore, it is possible to prevent erroneous detection of the filling body formation, increase in required power, and blockage.

  In this way, the downstream portion of the raw material filler P is sequentially discharged from the discharge port 32x of the supply pipe 32, and a steady operation state in which the pressurized container 4 is charged through the discharge pipe 31 is achieved. In the steady operation state, as shown in FIG. 8, the filler P is discharged in order from the downstream side, but on the upstream side, it grows with the newly pushed raw material, so its length and sealing performance are maintained.

  On the other hand, when in such a steady operation state, since the differential pressure between the upstream pressure and the downstream pressure is applied to the filling body P, the filling is performed when the raw material is insufficiently filled or heterogeneous. The body P may collapse and cause seal leakage. Therefore, a seal leak detecting means for detecting whether or not the filler P has leaked is provided. As shown in FIG. 4, when such a situation is detected, the controller closes the back pressure valve 40 and refills. It is preferred to promote body formation. Although this seal leak detection means can be determined as appropriate, the supply destination of the raw material is the pressurized container 4, and such a pressurized container 4 is usually provided with an internal pressure gauge 4p (see FIG. 2). Since the seal leakage appears as a rapid decrease in internal pressure, the back pressure valve 40 is controlled to close when the internal pressure of the pressurized container 4 decreases rapidly, that is, when the measured value by the internal pressure gauge 4p decreases by a predetermined value or more within a predetermined time. It is desirable to do.

  Moreover, when the pressurized container 4 is a container which reacts at high temperature like this example, the internal temperature of the pressurized container 4 is higher than the temperature of the upstream of the filler P, and in such a case, the filler P When seal leakage occurs, the temperature on the upstream side of the filler P increases. Therefore, it is also preferable to provide an upstream side exhaust thermometer 30t that measures the exhaust temperature upstream of the filling region 32z as the seal leak detection means, and to perform the closing control of the back pressure valve 40 when the measured temperature rises. It is.

  When the filling body P is formed by such control, the back pressure valve 40 is automatically opened by the above-described control at the time of forming the filling body, and can be smoothly returned to the steady operation. However, if it takes a certain amount of time to close the back pressure valve 40 due to the detection of the seal leak, the control to open the back pressure valve 40 when the intermediate state of the back pressure valve 40 is detected during this time, and the closing of the back pressure valve 40 due to the seal leak. Control may be repeated. Therefore, as shown in FIG. 4, when the back pressure valve 40 is closed by detecting the seal leak of the filler P, the delay timer is operated thereafter, and the intermediate state detecting means detects that the intermediate state is in the intermediate state until a predetermined time elapses. It is preferable to perform control so that the back pressure valve 40 is not opened even when it is performed. Thereby, the situation where the back pressure valve 40 repeats opening and closing can be prevented.

<Others>
In the screw feeder as in the above example, the friction resistance of the raw material supply and the torque of the screw shaft 33, the thrust force, or the current of the electric motor 34 have a correlation, and the formation of the raw material filler P and the friction resistance of the raw material supply Have a correlation. That is, the torque of the screw shaft 33, the thrust force, or the current of the electric motor 34 and the formation of the raw material filler P have a correlation. Therefore, when using a plug screw feeder as in the above example, a torque detector (not shown) for detecting the torque of the screw shaft 33, a thrust force detector (not shown) for detecting the thrust force of the screw shaft 33, and an electric motor 34. At least one auxiliary detection means is provided in the current detector 34m for detecting the current 34, and the detection value by the auxiliary detection means is obtained by combining the measurement result of the auxiliary detection means and the detection result of the intermediate state detection means of the valve body 41. Is more accurate by controlling the cylinder 42 to open the back pressure valve 40 when the intermediate state detecting means detects that the valve body 41 of the back pressure valve 40 is in the intermediate state. It is possible to detect the formation of a filler.

  Although this invention is suitable for the raw material supply to the pressurization reaction container in saccharification of woody biomass, it cannot be overemphasized that it can apply also to the use of the raw material supply to another pressurization container.

  DESCRIPTION OF SYMBOLS 1 ... Saccharification reaction apparatus, 2 ... Washing machine, 3 ... Dehydrator, 4 ... Pressurization container, 10 ... Ethanol conversion apparatus, 20 ... Raw material supply apparatus, 30 ... Pressurization container supply apparatus, 40 ... Back pressure valve.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows that woody biomass (solid content) such as bagasse, rice husk, rice straw, and wood chips (including waste building materials) is washed by the washing machine 2, and then dehydrated to a moisture content of about 80 to 85% by weight with the dehydrator 3. After that, the saccharification reaction apparatus 1 generates C6 saccharides such as glucose, galactose and mannose, and C5 saccharides such as xylose and arabinose by hydrolysis with a dilute sulfuric acid catalyst in the pressurized container 4 and the production by the saccharification reaction apparatus 1 The liquid content of the product is collected by a filtration device 11 such as a horizontal belt filter, neutralized by adding slaked lime in a neutralization tank 12, and then ethanol-converted by an ethanol-fermenting Escherichia coli in a fermentation tank 13, a concentrator 14, and a distillation tower 15 shows an example of woody biomass ethanol equipment having an ethanol conversion device 10 that recovers ethanol through a dehydrating device 16. In this example of equipment, the hydrolysis residue (cellulose, lignin), which is a solid content recovered by the filtration device 11, is used as, for example, boiler fuel or compost.

Claims (9)

A solid-liquid mixed raw material composed of a liquid and a solid is continuously supplied into a pressurized container through a supply pipe, and a filling body is formed by hermetically filling the raw material in the supply pipe. A material seal type feeder that supplies the raw material while blocking the upstream pressure and the downstream pressure of the supply pipe by
A back pressure valve provided on the downstream side of the filling region of the filler in the feeder supply line;
An opening / closing drive for the back pressure valve;
A pressurized container supply device comprising:
Intermediate state detection means for detecting whether or not the valve body of the back pressure valve is in an intermediate state between a closed state and an open state;
A control device for performing control to open the back pressure valve by the opening / closing drive device when it is detected by the intermediate state detection means that the valve body of the back pressure valve is in the intermediate state;
A pressurized container supply device comprising:   The intermediate state detection means is a closed limit switch that is turned on / off depending on the moving force of the valve body of the back pressure valve when the valve body of the back pressure valve is in the closed state and when in the intermediate state. The pressurized container supply device according to claim 1. The feeder includes the supply pipe configured so that the inner diameter gradually decreases toward the filling region of the filler, a screw installed in the supply pipe along the pipe axis direction, and the screw. A plug screw feeder equipped with an electric motor for rotational driving,
In addition to the intermediate state detection means, it comprises at least one auxiliary detection means of the following (A) to (C):
(A) a torque detector for detecting the torque of the screw shaft;
(B) a thrust force detector for detecting a thrust force of the screw shaft;
(C) a current detector for detecting the current of the motor;
When the detected value by the auxiliary detecting means is equal to or greater than a predetermined value and the intermediate state detecting means detects that the valve body of the back pressure valve is in the intermediate state, the control device uses the opening / closing drive device. Control to open the back pressure valve,
The pressurized container supply apparatus according to claim 1 or 2. A seal leak detecting means for detecting whether or not the filler has a seal leak;
2. The pressurized container supply device according to claim 1, wherein the control device performs control for closing the back pressure valve when it is detected by the seal leakage detection means that the filler has leaked. 3.   The seal leak detection means is an internal pressure gauge that measures the internal pressure of the pressurized container, and the control device controls the closing of the back pressure valve when a measured value by the internal pressure gauge decreases by a predetermined value or more within a predetermined time. The continuous supply type reactor according to claim 4, wherein The pressurized container has an internal temperature higher than the temperature upstream of the filler,
The seal leak detection means is an upstream exhaust thermometer that measures an exhaust temperature of an exhaust port provided upstream of a filling region of the filler in the supply pipeline, and is measured by the upstream exhaust thermometer. The pressurization container supply device according to claim 4 or 5 which performs control which closes said back pressure valve when a value rises above a predetermined temperature.   The controller closes the back pressure valve when the back pressure valve is closed by detecting a seal leak of the filling body, and when the intermediate state detecting means detects that the back state is in the intermediate state until a predetermined time thereafter. The pressurized container supply apparatus of any one of Claims 4-6 which performs control which does not close.   The solid content of the raw material is woody biomass, the pressure vessel is a pressure reaction vessel that performs a hydrolysis reaction between the woody biomass and dilute sulfuric acid, and the liquid content of the raw material is water. The pressurization container supply apparatus of any one of these. While the solid-liquid mixed raw material is continuously supplied into the pressurized container, a filling body of the raw material is formed in the supply pipe line, and the upstream side pressure and the downstream side pressure of the supply pipe line are blocked by the filling body. A method of supplying the raw material,
A back pressure valve is provided on the downstream side of the filling region of the filling body in the supply pipeline,
Opening the back pressure valve when the valve body of the back pressure valve is in an intermediate state between a closed state and an open state;
A pressurized container supply method characterized by the above.

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