JP2019121175A - Pressure difference reducing device for reducing pressure difference between high-temperature and high-pressure fluid, method of reducing pressure difference between high-temperature and high-pressure fluid using the same, and filtration device equipped with pressure difference reducing device and filtration method using the same - Google Patents

Abstract

A pressure difference reducing device between high temperature and high pressure fluids capable of suppressing the generation of a large pressure difference between high temperature and high pressure fluids over the entire operating time, and a pressure difference reducing method between high temperature and high pressure fluids using the same. To do. An internal space of a cylinder for storing a high-temperature and high-pressure fluid is separated into a first fluid storage section and a second fluid storage section by a partition wall that is reciprocally inserted, and the first fluid storage section and the second fluid storage section are separated. By alternately opening and closing the valves of the fluid discharge passages connected to the first fluid container and the second fluid container respectively while supplying the high-temperature and high-pressure fluid to the two fluid containers, A pressure difference reducing device between high-temperature and high-pressure fluids that operates so that the partition wall reciprocates is adopted. [Selection] Figure 1

Description

  The present invention relates to a device for reducing pressure difference between high temperature and high pressure fluid, a method for reducing pressure difference between high temperature and high pressure fluid using the same, a filtration device provided with the pressure difference reducing device, and a filtration method using the same.

  2. Description of the Related Art Conventionally, in a filter device, a reaction device or the like using a fluid, a mechanism has been proposed which makes the pressure between adjacent two fluids substantially equal or which reduces the pressure difference by separating members.

For example, in Patent Document 1, in the filter for liquid, the housing for containing the drug solution has a double structure including an inner housing for containing the drug solution and an outer housing for enclosing the inner housing with an air gap portion outside the housing. It is described that the internal housing is reinforced from the outside to prevent the breakage due to the hydraulic pressure by configuring the gap portion to be variable in pressure by gas.
And as a gas pressure control means of the said void part, using the pressure sensor provided in the inlet of a chemical | medical solution and the control valve provided in a gas pressurization pipe | tube are illustrated.

In each of Patent Documents 2 and 3, in the high-temperature and high-pressure reaction apparatus, the reaction vessel is disposed in the pressure-resistant vessel, and a high-pressure fluid is filled in the gap formed between the inner surface of the pressure-proof vessel and the outer surface of the reaction vessel. It is described that the pressure in the reaction vessel and the pressure in the gap are kept substantially the same.
A pressure gauge or a differential pressure gauge as a means for keeping the pressure in the reaction vessel and the pressure in the gap substantially the same, and a pressure control valve controlling the flow rate of the high pressure fluid introduced into the gap. The use of and is illustrated.

Unexamined-Japanese-Patent No. 6-319963 JP-A-9-85075 Unexamined-Japanese-Patent No. 2002-186844

The pressure control by the combination of the pressure gauge or differential pressure gauge and the valve (valve) described above can keep the pressure difference between the two fluids very small, as viewed in average value over the entire operation time of the device. However, in this pressure control mode, the time difference between the detection of the pressure difference by the pressure gauge or differential pressure gauge and the opening / closing of the valve (time lag in control), the signal of opening / closing the valve reaches the valve until the valve actually opens / closes. Time difference (time lag on valve operation) and that the time from when the valve opening / closing signal reaches the valve until the valve actually opens / closes slightly differs from one valve to another (individual differences between valves), etc. The pressure difference between the two fluids may be increased momentarily. This concern is particularly significant when using high temperature, high pressure fluids.
The occurrence of a large pressure difference between the two fluids separated by the members must be avoided as it leads to the destruction of the members separating the two fluids even in a moment.

  Therefore, according to the present invention, a device for reducing the pressure difference between high-temperature and high-pressure fluid capable of suppressing the generation of a large pressure difference between high-temperature and high-pressure fluid over the entire operation time, and the pressure difference reduction between high-temperature and high-pressure fluid using this The task is to provide a method.

  As a result of conducting various studies to solve the above problems, the inventor of the present invention has replaced the control (static control) to minimize the pressure difference between the two fluids as much as possible. It has been found that the problem can be solved by adopting control (dynamic control) that constantly fluctuates within the allowable range, and the present invention has been accomplished.

That is, in order to solve the above problems, in the present invention,
“A device to reduce the pressure difference between high temperature and high pressure fluid,
A cylinder having an internal space for containing a high temperature high pressure fluid,
A partition which is inserted in the inner space of the cylinder so as to be capable of reciprocating and separates the inner space into a first fluid storage portion and a second fluid storage portion;
A first fluid supply passage connected to the first fluid containing portion near an end of the inner space and supplying a high temperature high pressure fluid to the first fluid containing portion;
A first fluid discharge passage connected to the first fluid containing portion near an end of the internal space and discharging a high temperature high pressure fluid from the first fluid containing portion;
A first on-off valve disposed in the first fluid discharge path and switching between discharge and stop of the high-temperature high-pressure fluid;
A second fluid supply passage connected to the second fluid containing portion near an end of the inner space and supplying a high temperature high pressure fluid to the second fluid containing portion;
A second fluid discharge passage connected to the second fluid container near the end of the internal space and discharging the high-temperature high-pressure fluid from the second fluid container;
A second on-off valve disposed in the second fluid discharge path and switching between discharging and stopping of the high-temperature high-pressure fluid;
Partition position detection means for detecting the position of the partition in the cylinder;
Based on the position information of the partition in the cylinder from the partition position detecting means, the arrival of the end of the region capable of reciprocating the partition is determined, and the first open / close valve and the Valve control means for switching the opening and closing of the two open / close valves;
Equipped with
Even when the partition wall is located at the end of the reciprocable area of the partition wall, the first fluid supply channel and the first fluid discharge channel, and the second fluid supply channel and the second fluid discharge channel, respectively. A device for reducing pressure difference between high temperature and high pressure fluid, which is configured to communicate with the internal space
To adopt.

Further, in the present invention, as a method of reducing the pressure difference between the high temperature and high pressure fluid using the above-described pressure difference reducing device between the high temperature and high pressure fluid,
“(A _I ): The partition is disposed at the end portion of the partition where the second fluid containing portion can reciprocate, and the partition position detection unit detects the position of the partition in the cylinder, or Starting detection of position and moving speed,
(B _I ): The first fluid supply passage, the first fluid storage portion, and the first fluid discharge passage are filled with a first high-temperature high-pressure fluid, and the second fluid supply passage, the second fluid storage portion, and Filling the second fluid discharge passage with a second high-temperature high-pressure fluid;
(C _I ): closing the first on-off valve and the second on-off valve by the valve control means,
(D _I ): continuous supply of a first high-temperature high-pressure fluid from the first fluid supply passage to the first fluid storage unit, and a second high-temperature supply from the second fluid supply passage to the second fluid storage unit Starting continuous supply of high pressure fluid,
(E _I ): the internal space while discharging the first high-temperature high-pressure fluid from the first fluid discharge passage in a state where the first on-off valve is opened by the valve control means and the second on-off valve is closed Moving the dividing wall in the direction of the first fluid discharge path at
(F _I ): When the valve control means determines that the end of the reciprocable region of the partition is reached based on the position information of the partition in the cylinder from the partition position detection unit Further, by closing the first on-off valve and opening the second on-off valve by the valve control means, while discharging the second high-temperature high-pressure fluid from the second fluid discharge passage, the partition wall is Moving in the direction of the second fluid outlet;
(G _I ): When the valve control means determines that the end of the reciprocable region of the partition is reached based on the position information of the partition in the cylinder from the partition position detection unit The valve control means closes the second on-off valve and opens the first on-off valve, thereby discharging the first high-temperature high-pressure fluid from the first fluid discharge passage, while maintaining the partition wall in the internal space. Moving in the direction of the first fluid outlet;
(H _I ): repeating the above (f _I ) and (g _I ),
Thus, the fluid in the first fluid storage unit, the first fluid supply passage and the space connected thereto, the second fluid storage unit, the second fluid supply passage and the fluid in the space connected thereto To maintain the pressure difference between the
Method of reducing pressure difference between high temperature and high pressure fluid. "
To adopt.

  According to the present invention, it is possible to suppress the occurrence of a large pressure difference between high temperature and high pressure fluid over the entire operation time, reduce the pressure difference between high temperature and high pressure fluid, and reduce the pressure difference between high temperature and high pressure fluid using this Can be provided.

It is the schematic (cross-sectional view) of the pressure difference reduction apparatus between the high temperature high pressure fluid which concerns on one Embodiment of this invention. It is the schematic (cross-sectional view) which shows the other apparatus structural example in the pressure difference reduction apparatus between the high temperature high pressure fluids which concern on one Embodiment of this invention The pressure difference reduction apparatus between the high-temperature high-pressure fluid which concerns on one Embodiment of this invention WHEREIN: It is the schematic (cross-sectional view) which shows the apparatus structural example in the case of providing the exposure member for detection of a partition position. In the pressure difference reduction device between high temperature high pressure fluid which relates to one execution form of this invention, the outline figure which shows the device constitution example when the exposure component for detection of partition position consists of combination of plural members (cross section diagram) is there It is an explanatory view showing the principle of operation of a pressure difference reduction device between high temperature high pressure fluid concerning one embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic (cross-sectional view) which shows the structural example of the filtration apparatus of high temperature high pressure fluid provided with the pressure difference reduction apparatus between high temperature high pressure fluids which concerns on one Embodiment of this invention.

  Hereinafter, the present invention will be described in detail based on one embodiment, but the present invention is not limited to the embodiment.

(High temperature high pressure fluid)
In one embodiment of the present invention (hereinafter referred to as “the present embodiment”), the high-temperature high-pressure fluid is a fluid in a supercritical state or a subcritical state, or a temperature of 100 ° C. or more and a pressure exceeding normal pressure. Means a fluid having
The type of high-temperature high-pressure fluid is not particularly limited, and water, alcohol, ether, hydrocarbon (ethane, propane, benzene, toluene etc.), halogen-based solvents (methylene chloride, chlorotrifluoromethane etc.), nitrogen, carbon monoxide, It may be selected from carbon dioxide, ammonia, helium and argon according to the purpose.

(Configuration of pressure difference reduction device between high temperature and high pressure fluid)
The apparatus for reducing the pressure difference between high-temperature and high-pressure fluid according to the present embodiment comprises a cylinder 1 having an inner space 2 for containing a high-temperature high-pressure fluid, and an inner space 2 as a first fluid containing part 21 as schematically shown in FIG. A first fluid supply passage 41 and a first fluid discharge passage 51 connected to the first fluid storage unit 21 in the vicinity of the end of the internal space 2; The first on-off valve 61 disposed in the fluid discharge passage 51, the second fluid supply passage 42 and the second fluid discharge passage 52 connected to the second fluid housing 22 near the end of the internal space 2, and the second A second on-off valve 62 disposed in the fluid discharge path 52, partition position detection means (not shown) for detecting the position of the partition 3 in the cylinder 1, and cylinder 1 of the partition 3 from the partition position detection means Based on location information in Determining the arrival of the end of the reciprocable region of the partition wall 3, and a valve control means (not shown) for switching the opening and closing of the first on-off valve and the second on-off valve by the judgment.

  The cylinder 1 can accommodate the high-temperature high-pressure fluid in the internal space 2 without being damaged or deformed by the pressure of the high-temperature high-pressure fluid and without reacting with the high-temperature high-pressure fluid. The shape, size, material, etc. are not limited as long as they can reciprocate. Examples of the material of the cylinder 1 include SUS304, SUS316, Hastelloy (registered trademark), C-276, Inconel (registered trademark), and the like. In addition, the inner wall may be coated with a coating such as plating or vapor deposition for the purpose of improving the corrosion resistance to a high temperature / high pressure fluid and facilitating the reciprocation of the partition wall 3 described later.

  The partition 3 is an internal space 2 so that the high temperature / high pressure fluid contained in the first fluid containing portion 21 and the high temperature / high pressure fluid contained in the second fluid containing portion 22 do not contact with each other without reacting with the high temperature / high pressure fluid. The structure, the material, and the like are not limited as long as they can reciprocate smoothly in the interior space 2 of the cylinder 1 while partitioning the space. As an example of the structure of the partition wall 3, O-ring, Omni seal (registered trademark), etc. are formed around a disk-shaped main body made of SUS 304, SUS 316, Hastelloy (registered trademark), C-276, Inconel (registered trademark) or the like. And so on are disposed.

  The device for reducing the pressure difference between the high temperature and high pressure fluid according to the present embodiment is configured such that the first fluid supply passage 41 and the first fluid discharge passage 51 are disposed even when the partition 3 is positioned at the end of the reciprocable region of the partition 3. , And the second fluid supply passage 42 and the second fluid discharge passage 52 are in communication with each other via the internal space 2. As an example of such an apparatus shape, as shown in FIG. 1, the inner wall of the cylinder 1 has a shape having a convex portion 11 for restricting the movement of the partition 3, and as shown in FIG. The shape which has the recessed part 31 which permits the distribution | circulation of a high pressure fluid is mentioned.

  The first fluid supply passage 41 and the first fluid discharge passage 51 are respectively connected to the first fluid storage portion 21 in the vicinity of the end of the internal space 2 of the cylinder 1. Here, the vicinity of the end of the internal space 2 refers to the case where the partition 3 is located at the end of the reciprocable region of the partition 3 due to the shapes of the internal space 2 and the partition 3 of the cylinder 1 described above. However, it means an area not blocked by the partition wall 3. The first fluid supply passage 41 and the first fluid discharge passage 51 are configured such that the high temperature / high pressure fluid can be smoothly circulated without being damaged or deformed by the pressure of the high temperature / high pressure fluid and without reacting with the high temperature / high pressure fluid. The shape, size, material, etc. are not limited as long as they are present. Examples of the material of the first fluid supply passage 41 and the first fluid discharge passage 51 include SUS304, SUS316, Hastelloy (registered trademark), C-276, Inconel (registered trademark), and the like. In addition, the inner wall may be coated with a coating such as plating or evaporation for the purpose of improving the corrosion resistance to a high temperature / high pressure fluid and reducing the pipe resistance (pressure loss).

  The first on-off valve 61 does not react with the high temperature / high pressure fluid, and can be automatically opened / closed by valve control means described later. When closed, the flow can be reliably stopped without leaking the high temperature / high pressure fluid. The structure, the material, and the like are not limited as long as the high-temperature and high-pressure fluid can be smoothly circulated when it is opened. A ball valve, a gate valve, etc. are mentioned as an example of a 1st on-off valve.

  The second fluid supply passage 42 and the second fluid discharge passage 52 are configured similarly to the first fluid supply passage 41 and the first fluid discharge passage 51, respectively, except that they are connected to the second fluid storage unit. . Further, the second on-off valve 62 is configured in the same manner as the first on-off valve 61 except that the second on-off valve 62 is disposed in the second fluid discharge passage.

If the partition position detection means in the present embodiment can detect the position of the partition 3 in the cylinder 1, that is, the position in the internal space 2, the structure and the installation location in the device are not limited. As the partition position detecting means, a non-contact type sensor is preferable in terms of preventing an increase in partition movement resistance due to contact with the partition and pressure fluctuation of the high temperature and high pressure fluid.
In addition to the position of the partition wall 3 in the cylinder 1, the partition wall position detection means is preferably configured to be able to detect the moving speed of the partition wall 3 as well. By configuring the partition wall position detection means in this way, in the valve control means described later, movement speed information is used in addition to the position information of the partition wall 3 to determine the arrival of the partition wall 3 to the reciprocating movable end. And the judgment can be made more accurately. Although a laser Doppler velocimeter is illustrated as a means to detect the position and movement speed of the partition 3 simultaneously, a partition position detection means is not limited to this.
In the present embodiment, the position of the partition 3 in the cylinder 1, or the position and moving speed (hereinafter, may be described as "position etc.") may be directly detected, but as shown in FIG. The position of the exposure member 32 connected to the partition 3 in synchronization with the reciprocating movement of the partition 3 and at least a part of which is exposed to the outside of the cylinder may be measured by the partition position detection means . With this configuration, a general-purpose displacement sensor can be used as a partition wall position detection unit. In this case, as shown in FIG. 4, the exposing member 32 may be configured by a combination of a plurality of members, or may be a member having a bent portion. With this configuration, it is possible to change the position at which the position of the partition 3 is to be measured, so the restriction on the installation position of the partition position detection means is reduced.

  The valve control means in the present embodiment determines the arrival of the end portion of the reciprocable area of the partition 3 based on the information such as the position of the partition 3 in the cylinder 1 detected by the partition position detection unit described above. It is configured to switch the opening and closing of the first on-off valve 61 and the second on-off valve 62 according to the determination. As the valve control means, a general-purpose or dedicated controller storing a program operating as described above can be used.

(Method to reduce pressure difference between high temperature and high pressure fluid)
A method of reducing the pressure difference between the high temperature and high pressure fluid using the above-described apparatus will be described with reference to FIG. In the following description, for convenience, the case where the first opening and closing valve is first opened and the second opening and closing valve closed is described, but the same is true for the case where the second opening and closing valve is opened first and the first opening and closing valve is closed. An effect is obtained.

First, the partition 3 is disposed at the end of the partition 3 where the second fluid containing portion 22 can reciprocate, and the position, or the position, and the moving speed of the partition 3 in the cylinder 1 by the partition position detecting means. Start detection of
Next, the first fluid supply passage 41, the first fluid container 21 and the first fluid discharge passage 51 are filled with the first high-temperature high-pressure fluid, and the second fluid supply passage 42, the second fluid container 22 and the second The fluid discharge passage 52 is filled with the second high-temperature high-pressure fluid, and the first on-off valve 61 and the second on-off valve 62 are closed by the valve control means.

  After the above preparation steps, continuous supply of the first high-temperature high-pressure fluid from the first fluid supply passage 41 to the first fluid storage unit 21 and a second supply of the second fluid supply passage 42 to the second fluid storage unit 22 are performed. Start the continuous supply of two high temperature high pressure fluid and operate the device. The apparatus may be operated without stopping the supply of each high-temperature high-pressure fluid from the above-mentioned preparation stage.

  After the operation of the device, in a state where the first on-off valve 61 is opened by the valve control means and the second on-off valve 62 is closed (see FIG. 5A), the first high-temperature high-pressure fluid is While discharging, the partition 3 is moved in the direction of the first fluid discharge path 51 in the internal space 2 (see FIG. 5B).

  Then, based on the information from the partition wall position detection unit such as the position of the partition wall 3 in the cylinder 1 etc., the valve control unit determines that the end of the region where the partition wall 3 can reciprocate is reached (see FIG. c), by closing the first on-off valve 61 and opening the second on-off valve 62 by the valve control means, the second high-temperature high-pressure fluid is discharged from the second fluid discharge passage 52 in the internal space 2 The partition 3 is moved in the direction of the second fluid discharge path 52 (see FIGS. 5 (d) and 5 (e)).

  Then, based on the information from the partition wall position detection unit such as the position of the partition wall 3 in the cylinder 1 etc., the valve control unit determines that the end of the region where the partition wall 3 can reciprocate is reached (see FIG. f), by closing the second on-off valve 62 and opening the first on-off valve 61 by the valve control means, the first high-temperature high-pressure fluid is discharged from the first fluid discharge passage 51 while the internal space 2 is The partition wall 3 is moved in the direction of the first fluid discharge passage 51 at the time (see FIGS. 5A and 5B).

  By repeating the above operation, the pressure difference between the first high-temperature high-pressure fluid and the second high-temperature high-pressure fluid can be maintained within a predetermined range. At that time, the position and moving speed of the partition 3 in the cylinder 1 are detected by the partition position detecting means, and based on the position information and moving speed information of the partition 3 in the cylinder 1 from the partition position detecting means in the valve control means. It is preferable to determine the arrival of the end portion of the partition which can reciprocate. As an example of such a judgment method, assuming that the opening and closing of the first opening and closing valve 61 and the second opening and closing valve 62 are switched at the moment when the position and movement speed of the partition 3 in the cylinder 1 are detected, The distance by which the partition 3 continues to move until the moving direction of 3 changes is predicted based on the detected position information and moving speed information, and the predicted distance is the reciprocation of the partition 3 at the moment of the detection It may be determined that the partition 3 has reached the end when the measured distance from the end of the possible area is equal to or less than the measured distance. By performing detection and judgment in this manner, the partition 3 can be reciprocated efficiently, so that the rapid increase in the pressure difference between the first high-temperature high-pressure fluid and the second high-temperature high-pressure fluid can be made more reliably. It can prevent.

(Filtering device for high temperature and high pressure fluid with pressure difference reducing device)
As an application example of the device for reducing the pressure difference between high-temperature and high-pressure fluid according to the present embodiment, a filtration device (hereinafter, referred to as “the filtration device”) including the device will be described with reference to FIG. Heretofore, filtration of high temperature high pressure fluids, in particular membrane filtration, has not been realized as there is no filtering medium that can withstand the pressure of the fluid. The apparatus for reducing the pressure difference between high-temperature and high-pressure fluid according to the present embodiment is adopted, and the pressure difference between the high-temperature and high-pressure fluid in contact with both sides of the filter medium is maintained at or below the pressure that the filter medium can withstand. It can be filtered as it is.

  In the present filtration device, the filtration space 7 is separated by the filtration material 8 into a first filtration space 71 and a second filtration space 72. The second filtration space 72 is provided with a to-be-filtered fluid supply passage 9 for supplying a high temperature and high pressure fluid before filtration. The first filtration space 71 and the second filtration space 72 are respectively connected to the first fluid supply passage 41 and the second fluid supply passage 42 of the pressure difference reduction device.

  The members forming the filtration space 7 are not limited in shape, size and size as long as the high temperature high pressure fluid can be accommodated in the filtration space 7 without being damaged or deformed by the pressure of the high temperature high pressure fluid and without reacting with the high temperature high pressure fluid. The material is not limited. Examples of the material include SUS304, SUS316, Hastelloy (registered trademark), C-276, Inconel (registered trademark), and the like. Further, for the purpose of improving the corrosion resistance to a high temperature and high pressure fluid, the inner wall may be coated with plating, vapor deposition or the like.

  The filter medium 8 is not particularly limited as long as the target impurities can be removed from the high-temperature high-pressure fluid. In the present filtration apparatus, the pressure of the first high-temperature high-pressure fluid contained in the first filtration space 71 and the second high-temperature high-pressure fluid contained in the second filtration space 72 by the action of the pressure difference reducing device described above. Since the difference can be kept within the range where the filter medium 8 does not break over the entire operation time of the device, and the pressure difference on both sides of the filter medium can be prevented from rising suddenly during the filtration operation, the rise There is no need to select the filter medium or to reinforce the filter medium in consideration of the pressure difference at the time.

In the present filtration device, the valve control means reaches the end of the area where the partition 3 can reciprocate based on the information from the partition position detection means such as the position of the partition 3 in the cylinder 1 for the reason described later. In addition to the determination of, the stop of the reciprocation of the partition 3 is also determined. As an example of such a configuration, it is determined that the stop has occurred when the change of the position information of the partition 3 in the cylinder 1 with respect to time becomes equal to or less than a fixed value, and the moving speed information of the partition 3 in the cylinder 1 is a fixed value Judging that it is a stop on the following things is mentioned.
The point that a valve control means is comprised so that opening and closing of the 1st on-off valve 61 and the 2nd on-off valve 62 may be switched by the said each judgment is the same as the pressure difference reduction apparatus mentioned above.

  According to the present filtration device, the fluid can be filtered in the high temperature and high pressure state. In the conventional filtration apparatus, it is necessary to return the high-temperature and high-pressure fluid to normal pressure and then to filter, so it is difficult to efficiently remove the impurities due to the phase separation accompanying the pressure reduction. On the other hand, in the present filtration device, since the phase separation of the fluid does not occur, the impurities can be efficiently removed.

(Method of filtering high-temperature high-pressure fluid using this filtration device)
When filtering the high-temperature and high-pressure fluid using the present filtration device, first, the first high-temperature and high-pressure fluid is not limited to the first fluid supply passage 41, the first fluid storage portion 21 and the first fluid discharge passage 51, In addition to filling the first filtration space 71, the second high-temperature high-pressure fluid fills the second filtration space 72 as well as the second fluid supply path 42, the second fluid storage portion 22 and the second fluid discharge path 52. Except that the first high-temperature high-pressure fluid uses a fluid that is substantially free of impurities to be filtered, and the second high-temperature high-pressure fluid uses a fluid to be filtered that contains impurities to be filtered. The preparation step is performed in the same procedure as the method for reducing the pressure difference between the high temperature and high pressure fluid described above.

  Subsequently, continuous supply of the first high-temperature high-pressure fluid from the first fluid supply passage 41 to the first fluid storage unit 21, and of the second high-temperature high-pressure fluid from the second fluid supply passage 42 to the second fluid storage unit 22 The continuous supply of the second high-temperature high-pressure fluid from the filtered fluid supply passage 9 to the second filtration space 72 is performed in the same manner as the above-described pressure difference reduction method between high-temperature high-pressure fluids, instead of the continuous supply. Activate the filtration device. At this time, the continuously supplied second high-temperature high-pressure fluid passes through the second filtration space 72 and the filter medium 8 to become the first high-temperature high-pressure fluid, which passes through the first filtration space 71 and the first fluid supply passage 41. The flow supplied to the one fluid storage unit 21 and the flow supplied from the second filtration space 72 to the second fluid storage unit 22 via the second fluid supply path 42 are divided.

  The operation of each on-off valve and the partition 3 after the operation of the present filtration device is basically the same as the method for reducing the pressure difference between the high-temperature high-pressure fluid described above. However, in the present filtration device, there is a possibility that the impurities to be removed may be deposited on the filter material 8 and the pores may be blocked. In this case, the second filter space 72 passes through the filter material 8 to the first filter space 71 Since there is no first high-temperature high-pressure fluid to be supplied, the partition 3 stops without reaching the end of the reciprocable area, and the subsequent filtration operation is not performed. In order to solve this problem, in the present filtration apparatus, as described above, the valve control means is used to stop the reciprocation of the partition 3 based on the information from the partition position detection unit such as the position of the partition 3 in the cylinder 1. According to the determination, the opening and closing of the first on-off valve 61 and the second on-off valve 62 are also switched according to the determination. With this configuration, when the filter material 8 is blocked, the pressure on the first filtration space 71 side is made higher than that on the second filtration space 72 side by switching the opening and closing of the on-off valve. The deposited impurities can be removed and the filtration operation can be continued.

  In the description of the present filtration device and the filtration method described above, for the sake of convenience, the case in which the to-be-filtered fluid supply passage 9 is provided in the second filtration space 72 has been described. Also in the case where is provided, the same action and effect can be obtained by reversing the opening / closing order of the on-off valve and the moving direction of the partition wall 3.

  According to the present invention, it is possible to suppress the generation of a large pressure difference between high temperature and high pressure fluid over the entire operation time, reduce the pressure difference between high temperature and high pressure fluid, and reduce the pressure difference between high temperature and high pressure fluid using this We can provide a way. The pressure difference reduction device between high temperature and high pressure fluid according to the present invention can filter the fluid in the high temperature and high pressure state by adopting it in a filtration device, so in various reaction processes using the high temperature and high pressure fluid, It is useful in that impurities can be removed efficiently.

DESCRIPTION OF SYMBOLS 1 cylinder 11 convex part 2 internal space 21 first fluid accommodation part 22 second fluid accommodation part 3 partition 31 recessed part 32 exposure member 41 first fluid supply passage 42 second fluid supply passage 51 first fluid discharge passage 52 second fluid discharge Passageway 61 first on-off valve 62 second on-off valve 7 filtration space 71 first filtration space 72 second filtration space 8 filtration material 9 to-be-filtered fluid supply path

Claims (8)

An apparatus for reducing pressure difference between high temperature and high pressure fluid, comprising:
A cylinder having an internal space for containing a high temperature high pressure fluid,
A partition which is inserted in the inner space of the cylinder so as to be capable of reciprocating and separates the inner space into a first fluid storage portion and a second fluid storage portion;
A first fluid supply passage connected to the first fluid containing portion near an end of the inner space and supplying a high temperature high pressure fluid to the first fluid containing portion;
A first fluid discharge passage connected to the first fluid containing portion near an end of the internal space and discharging a high temperature high pressure fluid from the first fluid containing portion;
A first on-off valve disposed in the first fluid discharge path and switching between discharge and stop of the high-temperature high-pressure fluid;
A second fluid supply passage connected to the second fluid containing portion near an end of the inner space and supplying a high temperature high pressure fluid to the second fluid containing portion;
A second fluid discharge passage connected to the second fluid container near the end of the internal space and discharging the high-temperature high-pressure fluid from the second fluid container;
A second on-off valve disposed in the second fluid discharge path and switching between discharging and stopping of the high-temperature high-pressure fluid;
Partition position detection means for detecting the position of the partition in the cylinder;
Based on the position information of the partition in the cylinder from the partition position detecting means, the arrival of the end of the region capable of reciprocating the partition is determined, and the first open / close valve and the Valve control means for switching the opening and closing of the two open / close valves;
Equipped with
Even when the partition wall is located at the end of the reciprocable area of the partition wall, the first fluid supply channel and the first fluid discharge channel, and the second fluid supply channel and the second fluid discharge channel, respectively. A pressure difference reduction device between high temperature and high pressure fluid, which is configured to be communicated through the internal space. The partition wall position detection means is configured to be able to detect the position and moving speed of the partition wall in the cylinder,
The valve control means is configured to determine the arrival of the end of the reciprocable region of the partition based on position information and movement speed information of the partition within the cylinder from the partition position detection unit. Was done
The pressure difference reduction device for high temperature high pressure fluid according to claim 1. The partition is connected to an exposed member at least a part of which is exposed to the outside of the cylinder, and the exposed member is configured to reciprocate in synchronization with the reciprocating movement of the partition.
The high-pressure high-pressure fluid pressure difference reduction device according to claim 1 or 2, wherein the partition wall position detection means is configured to measure the position or the position and the movement speed of the exposed member. A method for reducing the pressure difference between high temperature and high pressure fluids using the device for reducing the pressure difference between high temperature and high pressure fluids according to any one of claims 1 to 3,
(A _I ): the partition is disposed at an end of the partition where the second fluid containing portion can reciprocate, and the partition position detection unit detects the position or position of the partition in the cylinder And start detecting the moving speed,
(B _I ): The first fluid supply passage, the first fluid storage portion, and the first fluid discharge passage are filled with a first high-temperature high-pressure fluid, and the second fluid supply passage, the second fluid storage portion, and Filling the second fluid discharge passage with a second high-temperature high-pressure fluid;
(C _I ): closing the first on-off valve and the second on-off valve by the valve control means,
(D _I ): continuous supply of a first high-temperature high-pressure fluid from the first fluid supply passage to the first fluid storage unit, and a second high-temperature supply from the second fluid supply passage to the second fluid storage unit Starting continuous supply of high pressure fluid,
(E _I ): the internal space while discharging the first high-temperature high-pressure fluid from the first fluid discharge passage in a state where the first on-off valve is opened by the valve control means and the second on-off valve is closed Moving the dividing wall in the direction of the first fluid discharge path at
(F _I ): based on position information of the partition in the cylinder, or position information and moving speed information from the partition position detecting unit, the valve control unit is an end of the reciprocable area of the partition When it is determined that the engine reaches the part, the first on-off valve is closed by the valve control means and the second on-off valve is opened, thereby discharging the second high-temperature high-pressure fluid from the second fluid discharge passage. Moving the partition in the internal space in the direction of the second fluid discharge path;
(G _I ): based on the position information of the partition in the cylinder, or position information and moving speed information from the partition position detecting unit, the valve control unit is an end of the reciprocable area of the partition When it is determined that the engine reaches the part, the second on-off valve is closed by the valve control means and the first on-off valve is opened, thereby discharging the first high-temperature high-pressure fluid from the first fluid discharge passage. Moving the partition in the internal space in the direction of the first fluid discharge path;
(H _I ): repeating the above (f _I ) and (g _I ),
Thus, the fluid in the first fluid storage unit, the first fluid supply passage and the space connected thereto, the second fluid storage unit, the second fluid supply passage and the fluid in the space connected thereto To maintain the pressure difference between the
Method of reducing pressure difference between high temperature and high pressure fluid. In the above (a _I ), the position and moving speed of the partition in the cylinder are detected by the partition position detecting means, and
5. The filtration according to claim 4, wherein in (f _I ) and (g _I ), the valve control means determines the arrival of the end of the reciprocable area of the partition in the following manner. Method.

(Method for judging the arrival of the end of the partition that can be reciprocated)
Assuming that the opening and closing of the first on-off valve and the second on-off valve are switched at the moment when the position and movement speed of the partition are detected, the distance the partition continues to move until the movement direction of the partition changes in that case Is estimated based on the detected position information and movement speed information, and the estimated distance is an actual measured distance from the end of the area where the partition can reciprocate at the moment when the position and movement speed are detected. It is determined that the partition has reached the end when the following occurs. A high-temperature high-pressure fluid filtering device comprising the high-temperature high-pressure fluid pressure difference reducing device according to any one of claims 1 to 3, comprising:
The first fluid supply passage is connected to a first filtration space, which is one of two spaces separated by a filter medium,
The second fluid supply path is connected to a second filtration space, which is the other of the two spaces separated by the filter medium,
The second filtration space is connected to a fluid-to-be-filtered supply path for supplying a fluid to be filtered to the second filtration space,
The valve control means reaches the end of the reciprocable area of the partition wall based on the position information of the partition wall in the cylinder, or the position information and movement speed information from the partition position detection means, and It is configured to determine the stop of the reciprocation and switch the opening and closing of the first on-off valve and the second on-off valve according to any of the respective determinations.
High temperature high pressure fluid filtration device. A filtration method using the high-temperature high-pressure fluid filtration device according to claim 6,
(A _II ): the partition is disposed at an end of the partition where the second fluid containing portion can reciprocate, and the partition position detection unit detects the position or position of the partition in the cylinder And start detecting the moving speed,
(B _II ): the first fluid supply passage, the first fluid storage portion, the first fluid discharge passage, and the first filtration space are filled with a first high-temperature high-pressure fluid substantially free of impurities to be filtered And filling the second high-temperature high-pressure fluid, which is a fluid to be filtered, in the second fluid supply passage, the second fluid storage unit, the second fluid discharge passage, and the second filtration space.
(C _II ): closing the first on-off valve and the second on-off valve by the valve control means,
(D _II ): starting continuous supply of a second high-temperature high-pressure fluid from the filtered fluid supply path to the second filtration space;
(E _II ): With the first on-off valve opened by the valve control means and the second on-off valve closed, the second high-temperature high-pressure fluid in the second filtration space is contained in the filter medium, The partition wall is moved in the direction of the first fluid discharge passage in the internal space while discharging from the first fluid discharge passage through the first filtration space, the first fluid supply passage, and the first fluid storage portion. To let
(F _II ): based on the position information of the partition in the cylinder, or the position information and movement speed information from the partition position detecting unit, the valve control unit is an end of a region where the partition can reciprocate The second filtration space is closed by closing the first on-off valve and opening the second on-off valve by the valve control means when it is determined that either the attainment of a part or the stopping of the reciprocation of the partition is stopped. The second high-temperature high-pressure fluid is discharged from the second fluid discharge passage through the second fluid supply passage and the second fluid storage portion, and the partition is formed in the inner space as the second fluid discharge passage Moving in the direction of
(G _II ): based on the position information of the partition in the cylinder, or the position information and movement speed information from the partition position detecting unit, the valve control unit is an end of the reciprocable area of the partition The second filtration space is closed by closing the second on-off valve and opening the first on-off valve by the valve control means when it is determined that either the attainment of a part or the stopping of the reciprocation of the partition is stopped. The second high-temperature high-pressure fluid inside the filter medium, the first filtration space, the first fluid supply passage, and the first fluid storage portion, and discharging the first fluid discharge passage from the first fluid discharge passage; Moving the partition in an internal space towards the first fluid discharge path;
(H _II ): repeating the above (f _II ) and (g _II ),
The filtration method which obtains the high temperature high pressure fluid with which the amount of impurities was reduced by said 1st fluid discharge way. In the above (a _II ), the partition position detection means detects the position and moving speed of the partition in the cylinder, and
The filtration according to claim 7, wherein in (f _II ) and (g _II ), the valve control means determines the arrival of the end of the reciprocable region of the partition in the following manner. Method.

(Method for judging the arrival of the end of the partition that can be reciprocated)
Assuming that the opening and closing of the first on-off valve and the second on-off valve are switched at the moment when the position and movement speed of the partition are detected, the distance the partition continues to move until the movement direction of the partition changes in that case Is estimated based on the detected position information and movement speed information, and the estimated distance is an actual measured distance from the end of the area where the partition can reciprocate at the moment when the position and movement speed are detected. It is determined that the partition has reached the end when the following occurs.