JP2008093572A - High-pressure fluid extraction system and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to continuously operating a high-pressure fluid extraction system for a long period of time by reducing the wear of parts such as a pressure control valve and a capillary tube. <P>SOLUTION: In the high-pressure fluid extraction system provided with a high-pressure vessel 1, a high-pressure fluid feed pipe 31, a vapor-liquid separator 4, a liquid feed pipe 32, a vapor feed pipe 32, a pressure control valve 5, a liquid level control valve 8 or the like, a filter 3 is installed which is connected to the high-pressure vessel 1 and separates solid particulates contained in a high-pressure fluid flowing out from the high-pressure vessel 1 in the front stage side of the vapor-liquid separator 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a high-pressure fluid extraction technique applied to a supercritical continuous processing system and the like, and more particularly to a high-pressure fluid extraction system and a high-pressure fluid extraction device that enable continuous operation for a long time by preventing wear of components.

  Conventionally, a high-pressure fluid extraction system for extracting a high-pressure fluid from a high-pressure vessel, for example, a supercritical continuous processing system is known. In this supercritical continuous processing system, generally, an object to be processed is pressurized with a high-pressure pump, the heated fluid is supplied to a reaction vessel, which is a high-pressure vessel, and processed, and one or more stages are processed by a capillary tube or a pressure control valve. The high pressure fluid in the reaction vessel is extracted by reducing the pressure.

  With regard to such a high-pressure fluid extraction system, the technologies proposed so far include, for example, cooling the high-pressure fluid delivered from the reaction vessel, reducing the pressure to a medium pressure or low pressure with a pressure control valve, and then gas with a gas-liquid separator. And the separated gas is extracted from the pressure regulating valve provided in the gas delivery pipe to adjust the pressure of the gas-liquid separator, while the liquid passes through the filter provided in the liquid delivery pipe to remove the solid matter. There is a system for removing the liquid level control valve after the removal and adjusting the liquid level of the gas-liquid separator (see, for example, Patent Document 1). An orifice can be used instead of the valve.

As another technique, there is a system in which a processing liquid flowing out from a reaction vessel is cooled to room temperature, decompressed by a capillary tube, and gas and liquid are separated by a gas-liquid separator. In this technique, it has been proposed to extend the life of a part by compensating for a change in pressure loss caused by fluctuations in the processing liquid by supplying water from another system to the capillary tube (see, for example, Patent Document 2). ).
JP 2001-46855 A JP 2000-276238 A

  As described above, in a conventional high-pressure fluid extraction system, a pressure control valve, a capillary tube, or the like is installed on the upstream side of the filter. In such a configuration, since the mixed fluid of liquid and gas containing solid fine particles is subjected to a pressure reducing action in a high differential pressure environment, the pressure control valve or the capillary tube or the like is heavily worn, and the pressure can be maintained. There is a problem that long-term continuous operation is hindered, such as disappearing.

  The present invention has been made to solve the above-mentioned problems, and by removing solids such as solid fine particles in advance and then performing a pressure reduction treatment, wear of parts such as a pressure control valve or a capillary tube is suppressed. It is an object of the present invention to provide a high-pressure fluid extraction system and a high-pressure fluid extraction device that can be operated continuously for a long time.

  In order to achieve the above object, in the present invention, a high-pressure container that contains a high-pressure fluid and solid fine particles contained in the high-pressure fluid that is connected to the high-pressure container via a high-pressure fluid delivery pipe and flows out of the high-pressure container. A filter to be separated, a gas-liquid separator that is provided on the downstream side of the filter and separates the high-pressure fluid into a gas and a liquid, and a gas that sends out the gas and the liquid separated by the gas-liquid separator, respectively A delivery pipe and a liquid delivery pipe; a pressure control valve for controlling a gas extraction amount, which is provided in the gas delivery pipe and maintains a constant pressure in the gas-liquid separator; and provided in the liquid delivery pipe, A high-pressure fluid extraction system comprising a liquid level control valve for controlling a liquid level of a liquid in a separator is provided.

  Further, in the present invention, a high-pressure container that contains a high-pressure fluid, a filter that is connected to the high-pressure container via a high-pressure fluid delivery pipe and separates solid fine particles contained in the high-pressure fluid that flows out of the high-pressure container, A gas-liquid separator that is provided on the downstream side of the filter and separates the high-pressure fluid into a gas and a liquid, and a gas delivery pipe and a liquid delivery pipe that deliver the gas and liquid separated by the gas-liquid separator, respectively. A pressure control valve for controlling a gas extraction amount, which is provided in the gas delivery pipe and keeps the pressure in the gas-liquid separator constant, and a liquid control pipe provided in the liquid delivery pipe for controlling the liquid in the gas-liquid separator. And a liquid level control valve for controlling the liquid level, wherein the filter includes a metal-based, ceramic-based or fluororesin-based filter.

  According to the present invention, a filter is disposed upstream of the pressure control valve to remove solids such as solid fine particles in advance, and then subjected to pressure reduction, thereby causing wear of parts such as the pressure control valve or capillary tube. Thus, long-term continuous operation is possible.

  Hereinafter, with reference to the drawings, an embodiment of a high-pressure fluid extraction system and a high-pressure fluid extraction device according to the present invention will be described using a supercritical continuous processing system and the same device as an example.

[First Embodiment (FIG. 1)]
FIG. 1 is a system diagram showing a high-pressure fluid extraction system according to a first embodiment of the present invention. As shown in FIG. 1, in this embodiment, as a high-pressure vessel that contains a high-pressure fluid, for example, a reaction vessel 1 for performing an oxidation reaction of supercritical water is provided. A high pressure fluid delivery pipe 31 for discharging high pressure fluid is connected to the reaction vessel 1, and a cooler 2 is provided on the most upstream side of the high pressure fluid delivery pipe 31. In the cooler 2, the high-pressure fluid flowing out from the reaction vessel 1 is cooled.

  A filter 3 having a filter 16 is provided downstream of the cooler 2 in the high-pressure fluid delivery pipe 31. The filter 3 separates and removes the solid fine particles contained in the high-pressure fluid cooled by the cooler 2.

  The gas-liquid separator 4 is connected to the high-pressure fluid delivery pipe 31 on the downstream side of the filter 3. The gas-liquid separator 4 separates the high-pressure fluid into gas and liquid.

  Further, the gas / liquid separator 4 is provided with a gas delivery pipe 32 and a liquid delivery pipe 33, and the gas delivery pipe 32 and the liquid delivery pipe 33 include a gas 9 a and a liquid separated by the gas / liquid separator 4. 10 are sent out respectively. Note that the liquid 10 flowing toward the liquid delivery pipe 33 includes a small amount of gas 9b.

  The gas delivery pipe 32 is provided with a pressure control valve 5 for controlling a gas extraction amount that keeps the pressure in the gas-liquid separator 4 constant. The pressure control valve 5 is driven by a pressure control device 6 that detects the pressure in the gas delivery pipe 32 and thus in the gas-liquid separator 4 via a pressure gauge 40 and outputs a liquid level control valve signal 42.

  On the other hand, the liquid delivery pipe 33 is provided with a liquid level control valve 7 for controlling the liquid level of the liquid in the gas-liquid separator 4. The liquid level control valve 7 is driven by a liquid level control device 8 that detects the liquid level in the gas-liquid separator 4 via a liquid level detector 41 and outputs a liquid level control valve signal 43.

  That is, in this embodiment, the cooler 2 that cools the high-temperature and high-pressure fluid flowing out from the reaction vessel 1, the filter 3 that removes solids, the gas-liquid separator 4 that separates gas and liquid, and the gas The pressure control valve 5 for extracting, a pressure control device 6 for adjusting the opening degree, a liquid level control valve 7 for extracting liquid, and a liquid level control device 8 for adjusting the valve opening degree are provided. ing.

  In the present embodiment configured as described above, the high-temperature and high-pressure fluid containing the solid fine particles flowing out from the reaction vessel 1 is cooled by the cooler 2, and then the solid fine particles are removed by the filter 16 of the filter 3. Then, the high-pressure fluid from which the solid fine particles have been removed is supplied to the gas-liquid separator 4 and separated into gas and liquid, and the pressure of the gas-liquid separator 4 is detected by the pressure regulator 6, and the pressure regulating valve 5 is opened. The degree is adjusted and the gas 9a is discharged.

  Thereby, the pressure hs in the gas-liquid separator 4 is kept constant, the liquid level control device 8 detects the liquid level of the liquid 10 in the gas-liquid separator 4, and the opening degree of the liquid level control valve 7 is increased. By adjusting and discharging the liquid 10, the liquid level is maintained in a certain range.

  According to the present embodiment, the gas 9a, 9b and the liquid 10 that do not contain the solid fine particles after the solid fine particles are removed by the filter 3 pass through the pressure control valve 5 and the liquid level control valve 7, so that the valve As compared with the prior art, wear is reduced, and long-term continuous operation becomes possible. In the present embodiment and other embodiments described below, a capillary tube can be applied instead of the pressure control valve.

[Second Embodiment (FIG. 2)]
FIG. 2 is a system diagram showing a high-pressure fluid extraction system according to a second embodiment of the present invention. In the present embodiment, a second gas-liquid separator 4b that further separates the gas 9b from the liquid 10 whose pressure has decreased is provided downstream of the liquid level control valve 7a of the liquid delivery pipe 33a, and the second gas-liquid separator 4b. The second gas delivery pipe 32b and the second liquid delivery pipe 33b for delivering the gas 9b and the liquid 10 separated in step 2 and the second gas delivery pipe, respectively, and the pressure in the second gas-liquid separator 4b is kept constant. A second pressure control valve 5b for controlling the gas extraction amount to be maintained, and a second liquid level control valve 7b provided in the second liquid delivery pipe 33b for controlling the liquid level in the second gas-liquid separator 4b. The high-pressure fluid extraction system provided will be described. In addition, about the structure same as 1st Embodiment, the code | symbol same as FIG. 1 is attached | subjected to FIG. 2, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 2, in this embodiment, the cooler 2 that cools the high-temperature and high-pressure fluid flowing out from the reaction vessel 1, the filter 3 that removes solids, and the gas-liquid separator that separates gas and liquid. 4a, a pressure adjusting valve 5a for extracting gas, a pressure adjusting device 6a for adjusting the opening thereof, a liquid level control valve 7a for extracting liquid, a liquid level control device 8a for adjusting the opening, and a liquid A second gas-liquid separator 4b for separating the fluid flowing out from the surface control valve 7a into a gas and a liquid, a second pressure regulating valve 5b for extracting the gas, and a second pressure regulating device 6b for adjusting the opening degree thereof. The second liquid level control valve 7b for extracting the liquid and the second liquid level control device 8b for adjusting the opening degree thereof are provided.

  In the present embodiment configured as above, the pressure is reduced by being extracted from the liquid level control valve 7a, and the gas generated is supplied to the second gas-liquid separator 4b to be separated into gas and liquid. Then, the pressure of the gas-liquid separator 4 is detected by detecting the pressure of the second gas-liquid separator 4b by the second pressure adjusting device 6b, adjusting the opening of the second pressure-regulating valve 5b, and discharging the gas 9a. Is maintained constant, the liquid level in the second gas-liquid separator 4b is detected by the second liquid level control device 8b via the liquid level detector 41b, and a liquid level control valve signal 43b is output. By adjusting the opening of the two-liquid level control valve 8b and discharging the liquid, the liquid level can be maintained within a certain range.

  The temperature of the fluid in the second gas-liquid separator 4b is cooled by the cooler 2 to a temperature at which the gas 9b is not liquefied. In addition, providing a control device that maintains the temperature of the fluid in the second gas-liquid separator 4b within a certain range is effective in improving the gas recovery rate.

  Further, when two or more kinds of gases are liquefied by the gas-liquid separator 4a, the third and fourth gas-liquid separators 4b are similarly provided downstream of the gas-liquid separator 4b (not shown). By installing multiple stages and reducing the pressure while controlling the temperature and pressure of the fluid, it is possible to separate and collect the gas.

  According to the present embodiment, when applied to, for example, a supercritical oxidation treatment system, a gas that is difficult to liquefy such as nitrogen and oxygen can be separated by the high-pressure gas-liquid separator 4a. A high concentration of carbon dioxide can be recovered by the liquid separator 4b and the like, and effective use as a raw material can be expected.

  Also in a high-pressure reaction system such as synthesis and decomposition, a plurality of types of gases can be separated and recovered by reducing the temperature and pressure stepwise, and can be effectively used as a raw material.

[Third Embodiment (FIG. 3)]
FIG. 3 is a system diagram showing a high-pressure fluid extraction system according to a third embodiment of the present invention. In the present embodiment, a middle portion of the high-pressure fluid delivery pipe 31 connected to the reaction vessel 1 as a high-pressure vessel is branched into a plurality of parallel branch pipes 31a and 31b, and solids are respectively provided to the branch pipes 31a and 31b. A high-pressure fluid extraction system provided with filters 3a, 3b for separating fine particles and pipe switching stop valves 11, 12, 11b, 12b arranged before and after the filters 3a, 3b will be described.

  Moreover, in this embodiment, the high pressure fluid which has the backwash lines 34 and 34b which supply a liquid or gas to the filter 3a, 3b, and the discharge lines 35a and 35b which discharge | emit the fluid in the filter 3a, 3b at the time of backwashing The extraction system will be described. In addition, about the structure same as 1st Embodiment, the code | symbol same as FIG. 1 is attached | subjected to FIG. 3, and the overlapping description is abbreviate | omitted.

  When processing is performed with the above configuration, first, the valves 11a and 12a before and after the filter 3a provided in one branch pipe 31a are opened, and the valves 11b and 12b before and after the other filter 3b are opened. Close and run the system.

  When the solid particulates separated and removed from the fluid are collected in the filter 3a, the valves 11b and 12b before and after the other filter 3b are opened, and then the valves 11a and 12a before and after the one filter 3a are closed. . While filtering with the other filter 3b, the filter 16a of one filter 3a is replaced and installed, or the filter is regenerated by washing.

  By performing this operation alternately between the filter 3a and the filter 3b, continuous operation becomes possible. Although not shown, if a device for measuring the differential pressures at the inlets and outlets of the filters 3a and 3b is installed, the filter switching timing can be detected by the increase in the differential pressure. Moreover, when it takes a long time to regenerate the filters 3a and 3b, continuous operation is possible by installing three or more similar filter lines.

  In this embodiment, it is possible to provide gas or liquid supply lines and valves, and drain lines and valves in the filters 3a and 3b. For example, the regeneration method of the filter 3a will be described as an example. The filter 3a discharges a drain valve (a valve 11a and a valve 12a) at the inlet / outlet of a fluid to be filtered, a valve 13a of a line for supplying a gas 9c or a liquid 10a, and a waste liquid containing solid fine particles accumulated in the filter 3a. It is composed of 14a of lines.

  First, when the valve 11a and the valve 12a of one filter 3a are closed and the valve 14a is opened, the high-pressure fluid inside the filter becomes normal pressure, so that the volume expands and the waste liquid is discharged. At this time, the fluid present on the valve 14a side of the filter 16a expands and passes through the surface of the filter 16a in the opposite direction to that during filtration, and backwashing is performed to remove the solid particulates accumulated on the surface of the filter 16a. Thereby, the filter 16a is regenerated.

  Further, the valve 13a is opened, the gas 9a or the liquid 10a is supplied to the filter 3a, and the filter 16a is back-washed. The valve 14a and the valve 13a are closed to finish the regeneration. For example, as the gas 9a, an inert gas such as air or nitrogen, or a gas 9a or a gas 9b recovered from the gas-liquid separator 4a can be used. As the liquid 10a, water, liquid 10, and chemicals used for cleaning the filter 16a can be used.

  It is also effective to back-wash with a plurality of gases or liquids or a combination of gas and liquid. Furthermore, the effect which suppresses the pressure fluctuation at the time of filter switching is show | played by filling the inside of the filter 3a with a liquid and complete | finishing reproduction | regeneration.

  In addition, the gas or liquid supply line and the valve 13a may be deleted, and the solid particulates deposited on the surface of the filter 16a may be backwashed and removed only by the expansion of the fluid existing on the valve 12a side of the filter 16a. Is possible. In the other filter 3b installed in parallel with the one filter 3a, it is unnecessary to remove the filter 16b from the filter 3b and perform cleaning by performing backwashing in the same manner as described above. The filter 16b can be regenerated as it is.

  According to this embodiment, since the line of a filter is parallel, a long-term continuous operation can be performed. Moreover, in another embodiment provided with the backwashing equipment, it is not necessary to remove the filter from the filter for cleaning, and work efficiency is improved. Furthermore, a part of the gas or liquid recovered from the system can be effectively used for backwashing.

[Fourth Embodiment (FIG. 4)]
FIG. 4 is a system diagram showing a high-pressure fluid extraction system according to a fourth embodiment of the present invention. In the present embodiment, the reaction vessel 1 as a high-pressure vessel that contains a high-pressure fluid, and solid particulates contained in the high-pressure fluid that is connected to the reaction vessel 1 via a high-pressure fluid delivery pipe 31 and flows out of the reaction vessel 1. The filter 3 to be separated, the gas-liquid separator 4 provided on the downstream side of the filter 3 and separating the high-pressure fluid into gas and liquid, and the gas and liquid separated by the gas-liquid separator 4 respectively. A gas delivery pipe 32 and a liquid delivery pipe 33 to be sent out, a pressure control valve 5 for controlling a gas extraction amount and a liquid delivery pipe 33 which are provided in the gas delivery pipe 32 and keep the pressure in the gas-liquid separator 4 constant. And a liquid level control valve 7 for controlling the liquid level in the gas-liquid separator 4. The filter 3 is a high-pressure fluid extraction device having a metal-based, ceramic-based or fluororesin-based filter 16. explain. In addition, about the structure same as 1st Embodiment, the code | symbol same as FIG. 1 is attached | subjected to FIG. 4, and the overlapping description is abbreviate | omitted.

  In this embodiment, the cooler 2a is disposed between the reaction vessel 1 and the filter 3, and the gas delivery pipe 32 and the liquid delivery pipe 33 for extracting gas and liquid from the gas-liquid separator 4 are connected to the cooler 2b. 2c is arranged, and in the filter 3, a filter 16 made of metal, ceramics, fluororesin, or a composite material thereof is installed.

  Then, the high-temperature and high-pressure fluid flowing out from the reactor 1 is cooled by the cooler 2a, the solid fine particles are removed by the filter 3 and supplied to the gas-liquid separator 4, and cooled by the coolers 2b and 2c. Extract each fluid. The cooling temperature can be increased due to the heat resistance of the filter 16. For example, if it is a fluororesin system, it can be used up to about 230 ° C., and if it is a metal system or a ceramic system, it can be used up to a higher temperature. Can be removed.

  The pressure of the gas 9a is reduced by the pressure control valve 5 to adiabatically expand and the temperature is lowered. When the temperature is significantly lowered, moisture contained in the gas 9a is solidified to generate a solid. This solid wears the material of the gap portion that reduces the pressure of the pressure control valve 5, and the pressure cannot be controlled, thus preventing a long-term continuous operation.

  Therefore, the cooler 2b does not perform unnecessary cooling so that the temperature of the gas 9a is equal to or higher than the temperature at which the solid is generated. That is, the cooling temperature of the cooler 2b does not cool more than necessary in consideration of the heat resistance temperature of the liquid level control valve 7 and the liquid temperature at the subsequent stage. In order to reduce the cooling capacity of the entire system by this method, it is effective to use heat radiation from the apparatus and piping, and any one of the coolers 2a, 2b, and 2c can be deleted.

  This method can also be applied to the high-pressure fluid extraction of the gas-liquid separator 4a of the second embodiment or the third embodiment, or the high-pressure fluid extraction of the gas-liquid separator 4a and the gas-liquid separator 4b. It is also effective in reducing the cooling capacity and extending the life of the pressure control valve 5a and the pressure control valve 5b.

  According to the present embodiment, the cooling capacity can be reduced, and space saving and energy consumption can be reduced by downsizing the cooling device.

  Moreover, since generation | occurrence | production of solids, such as a water | moisture content, by the adiabatic expansion of gas can be prevented, the effect which lengthens the lifetime of a pressure control valve can also be anticipated. In addition, the risk of valve damage is reduced, maintenance costs are reduced, long-term continuous operation is possible, and annual throughput is increased.

[Fifth Embodiment]
This embodiment relates to the valve system of the pressure control valve 5 in the first to fourth embodiments, and a back pressure type valve is used as the pressure control valve 5.

  That is, in the back pressure system, the valve itself has a function of maintaining the pressure constant by automatically adjusting the opening and changing the flow rate. Furthermore, in the method of reducing pressure and adjusting the flow rate in a gap between metals with high hardness, such as a flow control valve, in order to keep the pressure constant against pressure fluctuation, the fluctuation is detected and the gap interval is changed from the outside. Control.

  For this reason, since the wear of the metal surface becomes severe, a method of reducing the wear with a material having high hardness and extending the life of the valve has been taken. On the other hand, in the back pressure system, the material of the reduced pressure portion is a different material of metal and plastic. The force for pressing the metal and plastic corresponds to the pressure, and has an automatic control function such that when the pressure increases, the gap widens, and conversely when the pressure decreases, the gap narrows. Further, since plastic having elasticity is used, it is easy to maintain the gap even if the metal is worn, and the pressure can be maintained, so the life of the valve is long.

  In the present embodiment, since the pressure control valve 5 uses a back pressure valve having a function of automatically controlling the pressure, the pressure fluctuation is suppressed and a stable reaction can be performed. In addition, since a highly elastic plastic is used for the decompression portion, it is possible to suppress a decrease in the pressure maintenance function against metal wear and to extend the life of the valve, so that reduction of maintenance time and cost can be expected.

[Sixth Embodiment]
This embodiment relates to the material of the pressure control valve 5 when the configuration from the first embodiment to the fourth embodiment is used in an oxidizing atmosphere.

  That is, when the flow rate control valve 5 is used for pressure control, highly corrosion-resistant stainless steel or γ precipitation hardening type stainless steel is used as the material of the reduced pressure portion. For example, SUS630, SUS440A, etc. are used as high corrosion resistance stainless steel, and PH3, PH7, etc. are used as γ precipitation hardening type stainless steel. In general, Co-based alloys such as stellite used for flow control valves are eroded easily in an oxidizing atmosphere because of their high hardness and resistance to wear, but the above-mentioned stainless steel materials have high corrosion resistance against erosion. Therefore, corrosion of the material can be suppressed and the valve performance can be maintained for a long time.

  In this embodiment, a stainless steel material that is resistant to erosion in an oxidizing atmosphere is used as the material for reducing the pressure of the pressure regulating valve, so that deterioration of the valve performance can be suppressed and long-term continuous operation can be achieved. Cost reduction by reduction can be expected.

[Seventh Embodiment (FIG. 5)]
This embodiment relates to the high-pressure gas-liquid separator 4 in the configuration from the first embodiment to the fourth embodiment. The principle of the method for detecting the liquid level of the gas-liquid separator will be described with reference to FIG.

As shown in FIG. 5, the densities of the liquid 10 and the gas 9 are ρ _L and ρ _G , respectively, the height of the gas-liquid separator is h ₀ , the height of the liquid surface is h, the height of the gas 9 and the liquid 10 Let P _G and P _L be the pressure corresponding to the height of _G, and g be the acceleration of gravity. When the pressure in the gas-liquid separator outlet and P _0, the pressure of the height h is the sum of P ₀ and P _G, the pressure in the same way the height 0 is the sum of P ₀ and P _G and P _L. P _G and P _L can be expressed as follows: ρ _L and ρ _G
[Equation 1]
P _G = ρ _G (h ₀ -h) g
P _L = ρ _L h g
The differential pressure ΔP between the inlet and outlet of the gas-liquid separator is
[Equation 2]
ΔP = (P ₀ + P _G + P _L ) − P ₀
= P _G + P _L
= Ρ _G (h ₀ −h) g + ρ _L h g
It becomes. The height h of the liquid level is
[Equation 3]
_{h = (ΔP-ρ G h} 0 g) / (ρ L -ρ G) g
Thus, the liquid level h can be detected by the differential pressure ΔP. Even if the pressure P ₀ controlled by the pressure control valve 5 fluctuates, the detected liquid level h is not affected and stable liquid level control can be performed. For this reason, since the liquid level can be accurately controlled, mixing of the gas into the liquid discharged from the liquid level control valve 7 can be suppressed, which is effective in suppressing wear of the decompression portion of the valve.

  In the present embodiment, since the liquid level can be detected without being affected by the pressure fluctuation of the high pressure gas-liquid separator, it is possible to suppress the mixing of gas into the liquid discharged from the liquid level control valve, thereby extending the life of the valve. The maintenance cost can be reduced.

[Eighth Embodiment (FIGS. 6 and 7)]
FIG. 6 relates to the structure of the high-pressure gas-liquid separator 4 in the configuration from the first embodiment to the fourth embodiment of the present embodiment. The structure of the gas-liquid separator 4 will be described with reference to FIG.

  In the present embodiment, a high-pressure fluid extraction system in which one or more suspended particles 23 having a density lower than that of the liquid 10 are formed in the interface between the liquid 10 and the gas 9 inside the gas-liquid separator 4 will be described.

  The gas delivery pipe 32 connected to the gas-liquid separator 4 is provided with a mist separator 24 for collecting the liquid mist mixed in the gas and separating and removing the mist from the liquid. A high-pressure fluid extraction system provided with a liquid return line 25 returning to the separator 4 and a valve 14c for controlling the amount of liquid return will be described.

  Further, a high-pressure fluid extraction system in which the gas delivery pipe 32 of the gas-liquid separator 4 is provided with heating means 44 for heating the line between the gas-liquid separator 4 and the pressure control valve 5 as a pressure reducing device will be described.

  As shown in FIG. 6, an inlet nozzle 17 that supplies a high-pressure fluid to the gas-liquid separator 4 is disposed at a central position inside the gas-liquid separator 4. In the inlet nozzle 17, the inner diameter of the outlet 17 b is larger than that of the inlet 17 a connected to the gas-liquid separator 4. The change in inner diameter is, for example, stepped, three or more steps, or continuous.

  The gas-liquid mixed stream 18 enters from the inlet nozzle 17 and decreases in speed because the inner diameter increases, and is separated into the gas 9 and the liquid 10. The separated liquid 10 falls into a layer of the liquid 10 and is discharged from the liquid outlet 20 as shown as a liquid flow 19. On the other hand, the separated gas 9 is reversed and discharged from the gas outlet 22 along the outside of the inlet nozzle 17 as indicated by the arrow of the gas flow 21. By increasing the inner diameter of the inlet nozzle 17, the flow rate of the gas-liquid mixed fluid is slowed, the gas 9 and the liquid 10 are easily separated, and there is an effect of suppressing the mixing of the liquid 10 into the discharged gas 9.

  In addition, as shown in FIG. 7, the gas-liquid mixed fluid 18 collides with the inner wall of the lower portion where the inner diameter of the inlet nozzle 17 increases, and a swirling flow as shown as a gas flow 21 is generated obliquely. It is also effective to use a shape supplied in the direction. The liquid is separated from the gas by moving along the inner wall of the inlet nozzle 17 by centrifugal force as indicated by an arrow as the liquid flow 19 by the swirling flow, so that the separation performance of the gas and the liquid is improved.

  Further, as shown in FIG. 6, the liquid discharged from the liquid outlet 20 is formed by putting suspended particles 23 having a density lower than that of the liquid into the gas-liquid separator 4 and forming one or more layers on the liquid surface of the liquid 10. 10 can be prevented from being mixed with gas.

  Moreover, disposing the mist separator 24 in the gas delivery pipe 32 at the rear stage of the gas outlet 22 and separating the liquid 10a contained in the gas 9 and then reducing the pressure have an effect of suppressing wear of the valve 14c. . The liquid 10a separated by the mist separator 24 is discharged by opening and closing the valve 14c. At this time, if the liquid return line 25 for connecting the mist separator 24 and the gas-liquid separator 4 is provided, the pressure difference of the valve 14c is small, so that the liquid 10a can be easily discharged.

  Further, by providing the heating mechanism 44 in the line between the gas outlet 22 and the pressure regulating valve 5, it is possible to prevent the liquid in the gas from being changed to a solid due to cooling due to adiabatic expansion of the gas, and wear of the valve The effect which suppresses is show | played.

  According to this embodiment, the gas and liquid of the high-pressure gas-liquid separator 4 can be easily separated, and the effect of suppressing the mixing of the liquid into the gas and the mixing of the gas into the liquid is achieved. Therefore, it is possible to suppress the wear of the valve, extend the life of the valve, reduce maintenance, and operate for a long time.

[Ninth Embodiment (FIGS. 8 and 9)]
FIG. 8 is a sectional view showing a high-pressure fluid extraction device according to a ninth embodiment of the present invention. 9 is a cross-sectional view taken along line AA in FIG.

  In the present embodiment, the gas-liquid separator 4 has a cylindrical casing 50, and the gas-liquid mixing inlet 17 a is arranged along the tangential direction of the upper part of the casing 50, so that the gas-liquid mixing flow 18 that is the inflowing fluid A high-pressure fluid extraction device in which the liquid 10 descends while rotating along the inner wall of the casing 50 by centrifugal force will be described.

  Further, a high-pressure fluid extraction device in which an obstacle 25 made of a packing layer or baffle plate is arranged on the upper side of the gas-liquid separator 4 will be described.

  As shown in FIG. 8, the inner diameter of the gas-liquid separator 4 increases toward the lower side, and the gas-liquid mixing inlet 17a is away from the center of the casing 50 of the gas-liquid separator 4, that is, the casing 50. It is installed along the tangential direction. The gas-liquid mixed fluid 18 forms a swirl flow on the inner wall of the gas-liquid separator 4, the high-density liquid flow 19 is formed on the outside, and the low-density gas flow 21 is formed on the inside, and the gas 9 and the liquid 10 are separated from each other. To separate.

  In addition, providing the obstacle 26 in the gas discharge portion including the outlet cylinder 51 having the lower end opening provided on the upper side in the gas-liquid separator 4 separates the liquid 10 accompanying the gas 9 and returns it to the liquid layer. effective. For the obstacle 26, for example, a baffle plate, a net-like material, a filler, a sintered metal, a porous ceramic, or the like can be applied. The inlet structure and the outlet structure described above have an effect of separating the gas 9 and the liquid 10 on the one hand, but further effects are achieved by providing both.

  Moreover, the separation performance of the gas 9 and the liquid 10 can be improved by adding the suspended matter 23, the mist separator 24, and the like of the eighth embodiment.

  Furthermore, if the heating mechanism 44 is provided in the gas outlet line 22a to suppress the liquid 10 contained in the gas from changing to a solid in the decompression section, the effect of suppressing the wear of the valve is enhanced.

  According to this embodiment, the separation performance of the gas 9 and the liquid 10 of the gas-liquid separator 4 is improved, and the effect of suppressing the mixing of the liquid 10 into the gas 9 and the mixing of the gas 9 into the liquid 10 is achieved. Further, the wear of the valve for reducing the pressure of the gas 9 or the liquid 10 can be suppressed, the life of the valve can be extended, the maintenance can be reduced, and the operation can be performed for a long time.

[Tenth Embodiment (FIG. 10)]
FIG. 10 is a system diagram showing a high-pressure fluid extraction system according to a tenth embodiment of the present invention. In the present embodiment, the reaction vessel 1 as a high-pressure vessel containing high-pressure fluid, and the solid particles contained in the high-pressure fluid flowing out from the reaction vessel 1 are connected to the reaction vessel 1 via a high-pressure fluid delivery pipe 31. Filter 3, a gas-liquid separator 4 provided on the downstream side of the filter 3 for separating a high-pressure fluid into a gas and a liquid, and a gas and a liquid separated by the gas-liquid separator 4, respectively. The gas delivery pipe 33 and the liquid delivery pipe 33 that are provided, the liquid delivery pipe 33 and the liquid level control valve 7 that controls the liquid level of the liquid in the gas-liquid separator 4 and the liquid delivery pipe 33 are provided. And a pressure control valve 5 for controlling a gas extraction amount to keep the pressure in the liquid separator 4 constant.

  In the present embodiment configured as described above, in contrast to FIG. 1, pressure control is performed by extracting the liquid, and the liquid level is controlled by extracting the gas. Since the volume change due to the pressure of the liquid is smaller than that of the gas, the control of the pressure control valve is facilitated, and the change of the gap in the decompression portion is reduced, so that the effect of suppressing the wear of the valve can be expected.

  According to the present embodiment, since the pressure fluctuation is reduced, the control of the pressure control valve and the liquid level control valve becomes easy, the liquid and the gas can be stably extracted, and the effect of suppressing the wear of the valve is exhibited. .

1 is a system diagram showing a first embodiment of a high-pressure fluid extraction system according to the present invention. The systematic diagram which shows 2nd Embodiment of the high pressure fluid extraction system which concerns on this invention. The systematic diagram which shows 3rd Embodiment of the high pressure fluid extraction system which concerns on this invention. The systematic diagram which shows 4th Embodiment of the high pressure fluid extraction system which concerns on this invention. Explanatory drawing which shows the liquid level detection principle of the gas-liquid separator in each said embodiment. FIG. 3 is a structural diagram of a gas-liquid separator in each of the embodiments. FIG. 7 is another structural diagram of the gas-liquid separator shown in FIG. 6. Sectional drawing which shows the structure of embodiment (9th Embodiment) of the high pressure fluid extraction apparatus which concerns on this invention. FIG. 9 is a cross-sectional view taken along line AA in FIG. 8. The systematic diagram which shows the high pressure fluid extraction system by 10th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Reaction vessel, 2, 2a, 2b, 2c ... Cooler, 3, 3a, 3b ... Filter, 4, 4a, 4b ... Gas-liquid separator, 5, 5a, 5b ... Pressure regulating valve, 6, 6a, 6b, pressure control device, 7, 7a, 7b, liquid level control valve, 8, 8a, 8b, liquid level control device, 9, 9a, 9b, 9c, gas, 10, 10a, liquid, 11a, 11b, 12a, 12b, 13a, 13b, 14a, 14b, 14c... Valve, 15 waste liquid, 16 filter, 17 inlet nozzle, 17a gas-liquid mixed inlet, 18 gas-liquid mixed flow, 19 liquid flow, 20. Liquid outlet, 21 ... Gas flow, 22 ... Gas outlet, 22a ... Gas outlet line, 23 ... Airborne particles, 24 ... Mist separator, 25 ... Liquid return line, 26 ... Obstacle, 31 ... High pressure fluid delivery pipe, 32 ... gas delivery pipe, 33 ... liquid delivery pipe, 40, 40a, 40b Pressure gauge, 41, 41a, 41b ‥ liquid level detection gauge, 42,42a, 42b, 43,43a, 43b ‥ liquid level control valve signal.

Claims (15)

A high-pressure vessel containing high-pressure fluid, a filter connected to the high-pressure vessel via a high-pressure fluid delivery pipe, and separating solid particles contained in the high-pressure fluid flowing out from the high-pressure vessel, and a downstream side of the filter A gas-liquid separator for separating the high-pressure fluid into a gas and a liquid; a gas delivery pipe and a liquid delivery pipe for delivering the gas and liquid separated by the gas-liquid separator; and the gas delivery pipe A pressure control valve for controlling a gas extraction amount that keeps the pressure in the gas-liquid separator constant, and a liquid that is provided in the liquid delivery pipe and controls the liquid level of the liquid in the gas-liquid separator A high-pressure fluid extraction system comprising a surface control valve. After the liquid level control valve of the liquid delivery pipe, a second gas-liquid separator that further separates the gas from the liquid whose pressure has dropped, and the gas and liquid separated by the second gas-liquid separator are sent out, respectively. A second gas delivery pipe, a second liquid delivery pipe, a second pressure control valve for controlling a gas extraction amount which is provided in the second gas delivery pipe and keeps the pressure in the second gas-liquid separator constant; The high-pressure fluid extraction system according to claim 1, further comprising a second liquid level control valve that is provided in the second liquid delivery pipe and controls a liquid level of the liquid in the second gas-liquid separator. The middle part of the high-pressure fluid delivery pipe connected to the high-pressure vessel is branched into a plurality of parallel pipes, and a filter for separating solid fine particles into each branch pipe, respectively, and arranged before and after each of the filters. The high pressure fluid extraction system according to claim 1 or 2, further comprising a stop valve for switching the pipe line. The high-pressure fluid extraction system according to any one of claims 1 to 3, further comprising a backwash line for supplying liquid or gas to the filter and a discharge line for discharging the fluid in the filter during backwashing. The high-pressure fluid extraction system according to any one of claims 1 to 4, wherein the pressure control valve is a back pressure valve that holds the pressure of the high-pressure vessel and extracts gas from the gas-liquid separator. Liquid level detecting means for detecting the liquid level of the gas-liquid separator based on the differential pressure between the inlet and outlet of the high pressure fluid, and the opening of the liquid level control valve corresponding to the detected liquid level. The high-pressure fluid extraction system according to any one of claims 1 to 5, further comprising valve control means for controlling. 7. The high-pressure fluid extraction system according to claim 1, wherein at least one suspended particle having a density lower than that of the liquid is formed at an interface between the liquid and the gas inside the gas-liquid separator. The gas delivery pipe connected to the gas-liquid separator is provided with a mist separator that collects liquid mist mixed in the gas and separates and removes the mist from the liquid, and the separated liquid is supplied to the gas-liquid separator. The high-pressure fluid extraction system according to any one of claims 1 to 7, further comprising a liquid return line for returning to the valve and a valve for controlling a liquid return amount. The high-pressure fluid extraction system according to any one of claims 1 to 8, wherein the gas delivery pipe of the gas-liquid separator is provided with heating means for heating a line between the gas-liquid separator and the pressure reducing device. . A high-pressure vessel containing high-pressure fluid, a filter connected to the high-pressure vessel via a high-pressure fluid delivery pipe, and separating solid particles contained in the high-pressure fluid flowing out from the high-pressure vessel, and a downstream side of the filter A gas-liquid separator for separating the high-pressure fluid into a gas and a liquid; a gas delivery pipe and a liquid delivery pipe for delivering the gas and liquid separated by the gas-liquid separator; and the gas delivery pipe A liquid level control valve for controlling the liquid level of the liquid in the gas-liquid separator, and a gas discharge amount control provided in the liquid delivery pipe for keeping the pressure in the gas-liquid separator constant. A high-pressure fluid extraction system comprising a pressure control valve. A high-pressure vessel containing high-pressure fluid, a filter connected to the high-pressure vessel via a high-pressure fluid delivery pipe, and separating solid particles contained in the high-pressure fluid flowing out from the high-pressure vessel, and a downstream side of the filter A gas-liquid separator for separating the high-pressure fluid into a gas and a liquid; a gas delivery pipe and a liquid delivery pipe for delivering the gas and liquid separated by the gas-liquid separator; and the gas delivery pipe A pressure control valve for controlling a gas extraction amount that keeps the pressure in the gas-liquid separator constant, and a liquid that is provided in the liquid delivery pipe and controls the liquid level of the liquid in the gas-liquid separator A high-pressure fluid extraction apparatus comprising a surface control valve, wherein the filter includes a metal-based, ceramic-based, or fluororesin-based filter. The high pressure fluid extraction device according to claim 11, wherein a material of a valve body of the pressure control valve or the liquid level control valve is high corrosion resistance stainless steel or γ precipitation hardening stainless steel. The gas-liquid separator has a hermetically sealed casing and a fluid blowing pipe introduced from above into a central position in the casing, and the inner diameter of the fluid blowing pipe has an introduction base side to the casing. The high-pressure fluid extraction device according to claim 11 or 12, wherein the high-pressure fluid extraction device is gradually expanded from the tip to the tip opening side. The gas-liquid separator has a cylindrical casing, and a gas-liquid mixing inlet is disposed in a tangential direction of the upper part of the casing, and the liquid in the inflowing fluid descends while swirling the inner wall of the casing by centrifugal force. The high-pressure fluid extraction device according to any one of claims 11 to 13. The high-pressure fluid extraction device according to any one of claims 11 to 14, wherein an obstacle made of a packing layer or a baffle plate is disposed above the gas-liquid separator.

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