JP2005262042A - Foreign matter separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foreign matter separator the frequency of maintenance of which can be suppressed. <P>SOLUTION: This foreign matter separator 1 is provided with: an outlet port 5 having a liquid discharging port 5c arranged to be parted upward from the bottom 22 of a tank 2 by a predetermined distance and a discharge route 5a for discharging condensed water flowing into the liquid discharging port 5c to the outside; and a cap 6 which is arranged in such a state that the opening of the cap faces downward and used for covering the upper and side parts of the liquid discharging port 5c. A gas vent hole 63a is formed on the cap 6 so that the gas to be trapped in the cap 6 by the increase of the volume of a liquid mixture accumulated on the bottom 22 of the tank 2 is discharged to the inside of the tank 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a foreign matter separator for separating foreign matter (solid matter) from a liquid such as water.

  In general, a fuel reforming power generation system includes a reformer that reforms a hydrocarbon-based fuel containing hydrogen atoms such as methanol, and a hydrogen-rich gas (gas containing a large amount of hydrogen) generated by the reformer. ) And an externally supplied air. The hydrogen-rich gas thus generated in the reformer passes through the heat exchanger before being supplied to the fuel cell, thereby recovering heat from the gas and The condensed water produced | generated with heat | fever collection | recovery is collect | recovered.

  By the way, in this recovery step, foreign matter may be contained in the condensed water generated by condensing the gas coming out of the reformer, so it is necessary to remove the foreign matter in order to reuse the condensed water. There is. In addition, as a technique for removing foreign substances, conventionally, there is a technique for separating water and foreign substances by passing condensed water through a fine mesh filter (roughness of about several tens of microns) (see Patent Document 1).

JP-A-10-223246 (paragraph 0030, FIG. 5)

  However, according to the conventional technology, since the filter is easily clogged with foreign matters by making the mesh fine, the filter has to be frequently replaced, and there is a problem that maintenance becomes complicated.

  Therefore, an object of the present invention is to provide a foreign matter separator that can reduce the frequency of maintenance.

  The invention according to claim 1 of the present invention that solves the above-described problems is that a mixed liquid in which foreign matter and liquid are mixed and a gas are supplied, and the mixed liquid is stored at the bottom, and the gas is formed at the top. A foreign matter separator having a tank that discharges to the outside through the exhaust port, and a liquid discharge port disposed at a predetermined distance above the bottom of the tank and the liquid flowing into the liquid discharge port to the outside A drainage means having a discharge path for discharging; a cap provided with its opening facing downward to cover the upper and side of the liquid discharge port; and the mixing pooled at the bottom of the tank And a gas vent for discharging the gas confined in the cap when the volume of the liquid increases into the tank or out of the tank.

  Here, “drainage means” means a tubular outlet port (which has a discharge passage formed therein and a liquid discharge port formed in the side wall thereof) as described later. When a liquid discharge port is formed and a pipe is connected to the liquid discharge port, the side wall of the tank and the pipe are meant.

  According to the first aspect of the present invention, when the mixed liquid and the gas are supplied into the tank, the mixed liquid accumulates at the bottom of the tank and the gas is discharged from the exhaust port to the outside. Then, when the mixed liquid is collected up to the liquid discharge port and the mixed liquid is further supplied into the tank, foreign matters mixed with the mixed liquid are heavier than the liquid and settle to the bottom of the tank. The lighter one is blocked by the edge of the cap that covers the side of the liquid discharge port.

  The invention according to claim 2 is the foreign matter separator according to claim 1, wherein the drainage means is provided so as to penetrate from the bottom of the tank, and the liquid discharge port is formed on a side wall thereof. A tubular outlet port, wherein the cap is coupled to an upper end of the outlet port.

  According to the second aspect of the present invention, the cap can be installed in the tank simply by coupling the cap to the upper end of the outlet port penetrated from the bottom of the tank. For example, compared with the case where the cap is fixed to the side wall of the tank. The cap can be easily positioned and connected. In addition, since the cap only needs to be coupled to the upper end of the outlet port, for example, when the cap is installed in another tank having a different inner diameter, the cap can be installed without changing the shape of the cap.

Invention of Claim 3 is a foreign material separator of Claim 1 or Claim 2, Comprising:
An opening end of the cap is formed so as to be positioned below a predetermined distance from the liquid discharge port.

  According to the third aspect of the present invention, the opening end of the cap is kept in a state in which the volume of the mixed liquid is maintained by the liquid discharge port because the opening end of the cap is positioned below the liquid discharge port by a predetermined distance. It will be in the state where it dive only a predetermined distance from the liquid level of the mixed liquid. Therefore, when foreign matter is floating on the surface of the liquid mixture, even if the foreign matter is about to flow into the liquid discharge port, it is reliably blocked by the side wall of the cap, thus reliably preventing foreign matter from flowing into the liquid discharge port. be able to.

  Invention of Claim 4 is a foreign material separator of any one of Claim 1 thru | or 3, Comprising: The said degassing part is from the said liquid discharge port among the side surfaces of the said cap. Is a gas vent hole formed obliquely downward from the inner surface to the outer surface of the cap at an upper position.

  According to the fourth aspect of the present invention, the gas confined in the cap due to the increase in the volume of the mixed liquid that accumulates at the bottom of the tank is discharged into the tank from the vent hole formed in the side surface of the cap. The air is discharged to the outside through an exhaust port formed in the upper part of the tank. The degassing hole is formed obliquely downward from the inner surface to the outer surface of the cap, so that, for example, foreign matter mixed in the liquid mixture flowing down on the cap from above the tank passes through the degassing hole and enters the cap. It is prevented from entering the arranged liquid outlet.

  A fifth aspect of the present invention is the foreign matter separator according to the fourth aspect, characterized in that an openable and closable valve is provided at the outlet port to block the flow of the liquid.

  According to the invention described in claim 5, in a state where the liquid level of the mixed liquid in the tank is maintained at the liquid discharge port (a state where the opening end of the cap is immersed in the mixed liquid), the mixed liquid and the gas are When supplied into the tank, the gas enters the cap through the vent hole formed in the cap and tries to exit from the liquid discharge port. At this time, the valve is closed and the valve is closed. By storing a predetermined amount of liquid above, gas leakage from the outlet port to the outside is prevented.

  A sixth aspect of the present invention is the foreign matter separator according to any one of the first to third aspects, wherein the degassing portion is above the liquid discharge port in the cap. It is a degassing pipe which connects the space and the outside of the tank.

  According to the sixth aspect of the present invention, in a state where the liquid level of the mixed liquid in the tank is maintained at the liquid discharge port (a state where the opening end of the cap is immersed in the mixed liquid), the mixed liquid and the gas are Even if it is supplied into the tank, the gas in the cap is discharged to the outside through the gas vent pipe. Therefore, the problem that occurs when the vent hole is formed in the cap as described above (the problem that gas flows into the outlet port through the vent hole) is eliminated, and a valve for preventing gas leakage is provided at the outlet port. There is no need to provide it.

  A seventh aspect of the present invention is the foreign matter separator according to any one of the first to sixth aspects, wherein a drain port for discharging precipitated foreign matter is provided at the bottom of the tank. It is provided.

  According to the seventh aspect of the present invention, since the foreign matter that settles at the bottom of the tank is discharged by the drain port, the foreign matter does not collect at the bottom, so that the gap between the open end of the cap and the bottom of the tank can be reduced. It becomes possible, and the whole tank can be reduced in size.

  Invention of Claim 8 is a foreign material separator of any one of Claim 1 thru | or 7, Comprising: The area formed by the opening end of the said cap, and the said drainage means Is calculated on the basis of the flow rate of the liquid mixture supplied into the tank and a speed smaller than the sedimentation speed of foreign matter in the liquid mixture.

  According to the eighth aspect of the present invention, even if the foreign matter floating in the liquid enters the cap from the lower side when the mass of the foreign matter is slightly larger than the mass of the liquid, Since the speed of the liquid passing through the area formed by the drainage means is lower than the settling speed of the foreign matter, the foreign matter will not be carried to the liquid discharge port by the liquid, and will surely settle at the bottom of the tank It becomes.

  According to the first aspect of the present invention, since the foreign matter and the liquid can be separated without using a fine mesh filter, the frequency of maintenance can be suppressed.

  According to the second aspect of the present invention, since it is only necessary to couple the cap to the upper end of the outlet port penetrating from the bottom of the tank, the cap can be positioned and coupled more easily than when the cap is fixed to the side wall of the tank. For example, when the cap is installed in another tank having a different inner diameter, the cap can be installed without changing the shape of the cap.

  According to the third aspect of the present invention, since the opening end of the cap is positioned below the liquid discharge port by a predetermined distance, the foreign material flows into the liquid discharge port when the foreign material is floating on the surface of the liquid mixture. Even if it tries to do so, it can be reliably blocked by the side wall of the cap.

  According to the fourth aspect of the present invention, since the gas vent hole is formed obliquely downward from the inner surface to the outer surface of the cap, for example, the foreign matter mixed in the liquid mixture flowing down from above the tank onto the cap is gas. It is prevented from entering the liquid discharge port arranged in the cap through the hole.

  According to the fifth aspect of the present invention, the gas is not leaked from the outlet port to the outside by closing the valve and storing a predetermined amount of liquid above the valve. This eliminates the need to provide the device, and the cost can be reduced accordingly.

  According to the sixth aspect of the present invention, since it is not necessary to form a hole in the cap by connecting the inside of the cap and the outside of the tank with the gas vent pipe, the gas leaking from the hole formed in the cap is discharged to the outlet port. This eliminates the need for a valve for blocking the valve, thereby reducing the cost.

  According to the seventh aspect of the present invention, since foreign matter does not collect at the bottom by discharging foreign matter from the drain port, it is possible to reduce the gap between the open end of the cap and the bottom of the tank, and It can be downsized.

  According to the eighth aspect of the present invention, even if foreign matter floating in the liquid has entered the cap, the speed of the liquid passing through the area formed by the opening end of the cap and the drainage means is Therefore, it is possible to reliably prevent the foreign matter from flowing into the liquid discharge port.

[First Embodiment]
Next, a first embodiment of a foreign matter separator according to the present invention will be described in detail with reference to the drawings as appropriate. In the drawings to be referred to, FIG. 1 is a cutaway perspective view showing a foreign matter separator according to the first embodiment, and FIG. 2 is an enlarged cross-sectional view showing the structure in the vicinity of the outlet port of FIG.

  As shown in FIG. 1, the foreign material separator 1 separates the exhaust gas emitted from the heat exchanger in the fuel reforming power generation system into gas (gas), condensed water (liquid), and foreign material. , Mainly a tank 2, a guide 3, a filter 4, an outlet port 5 and a cap 6. Note that the fuel reforming power generation system according to the present embodiment is a system in which the hydrogen-rich gas reformed by the reformer is passed through the heat exchanger before being supplied to the fuel cell. The foreign substance separator 1 is provided between them. Further, the exhaust gas coming out of the heat exchanger contains a mixed liquid in which foreign matter and condensed water are mixed, and gas.

  The tank 2 is formed in a bottomed cylindrical shape, and an exhaust port 21a for exhausting gas to the outside is formed in the upper portion of the side wall 21 and an outlet port 5 is provided in the center portion of the bottom portion 22. A through hole 22a for penetrating and fixing is formed. The guide 3 is provided at the opening end of the tank 2 in order to guide the exhaust gas entering from the upper side of the tank 2 to the central portion of the bottom portion 22 of the tank 2, and gradually decreases in diameter from the upper side toward the lower side. The guide surface portion 31 having the above-described shape and the substantially cylindrical guide portion 32 that guides the exhaust gas throttled by the guide surface portion 31 downward are mainly configured.

  The filter 4 is a filter formed in a substantially ring shape from sintered metal or porous metal (Ni—Cr alloy or the like), and its inner surface is fitted near the opening end of the guide portion 32 of the guide 3. At the same time, its outer surface is fitted to the side wall 21 of the tank 2. And by arranging the filter 4 in the tank 2 in this way, the filter 4 functions to separate fine moisture contained in the gas discharged from the guide 3 from the gas, and the bottom 22 of the tank 2. It is supposed to have a function of blocking the mixed liquid that is scattered. That is, this filter 4 is installed for the purpose of gas-liquid separation, unlike a conventional filter installed for the purpose of separating the mixed liquid into condensed water and foreign matter.

  As shown in FIG. 2, the outlet port (drainage means) 5 is a tubular member in which a discharge path 5a is formed. The outlet port (drainage means) 5 is disposed at an appropriate position on the side wall 5b between the discharge path 5a and the inside of the tank 2. A communicating liquid discharge port 5c is formed. The liquid discharge port 5c is disposed at a position away from the bottom 22 of the tank 2 by a predetermined distance by fixing an appropriate position of the outlet port 5 to the through hole 22a of the tank 2 by welding or brazing. Yes. Moreover, what is necessary is just to set the internal diameter of the exit port 5 in the range of 1 mm-25 mm, but it is better to set in the range of 2 mm-13 mm desirably.

  Further, the outlet port 5 is provided with a substantially cylindrical plug 51 for closing the opening at the upper end thereof, and the condensed water flowing down the discharge passage 5a is blocked at an appropriate position exposed to the outside of the tank 2. An openable / closable drain trap 52 (see FIG. 1) for stopping is provided. The drain trap (valve) 52 is a seal that prevents gas from flowing out through the outlet port 5 by being kept closed with a predetermined amount of condensed water accumulated above it. It plays a role. In addition, the drain trap 52 that is normally kept closed as described above is opened for a predetermined time by a control device (not shown) before the water level of the condensed water accumulated above reaches the liquid discharge port 5c. In addition, a part of the condensed water accumulated above is controlled to be discharged to the outside.

  As shown in FIG. 2, the cap 6 is a member formed in a substantially cylindrical shape, and has a roof portion 61 that has a substantially conical surface shape that gradually increases in diameter from the top to the bottom, and an upper end of the roof portion 61. The mounting flange 62 is formed so as to be directed upward, and the lower flange 63 is formed so as to be directed downward at the lower end of the roof portion 61. And in the upper part of the lower flange 63, a gas vent hole (gas vent portion) 63a that is inclined downward from the inner surface to the outer surface of the cap 6 is formed. The gas vent 63 a is provided mainly for discharging the gas confined in the cap 6 due to the increase in the volume of the liquid mixture accumulated in the bottom 22 of the tank 2 into the tank 2.

  Further, the cap 6 is connected to the upper end of the outlet port 5 by the mounting flange 62 so as to cover the upper side and the side of the liquid discharge port 5 c formed in the outlet port 5, and at the lower end of the lower flange 63. The opening to be formed is directed downward. The coupling between the cap 6 and the outlet port 5 and the coupling between the stopper 51 and the outlet port 5 are performed by welding or brazing. Further, in the state where the cap 6 is coupled to the upper end of the outlet port 5 as described above, the gas vent hole 63a is disposed at a position above the liquid discharge port 5c formed in the outlet port 5. Become. Further, in such a state, the lower end of the lower flange 63 of the cap 6 is located above the bottom 22 of the tank 2 by a predetermined distance (distance X described later), and at a predetermined distance from the liquid discharge port 5c. It is only located below.

  Next, a method for determining the distance X from the bottom 22 of the tank 2 to the lower end of the lower flange 63 and the inner diameter D of the lower flange 63 formed in a cylindrical shape will be described. In the drawings to be referred to, FIG. 3 is a diagram showing a procedure for determining the distance X and the inner diameter D, and FIG. 4 is a cross-sectional view showing the passage area of the atmospheric fluid.

  As shown in FIG. 3, first, as the first procedure, after setting the type (substance name) of particles to be removed as foreign matters and their particle sizes, the assumed generation amount of the particles is obtained by experiments or simulations. Further, the flow rate Q of the atmospheric fluid flowing into the tank 2 is obtained by experiments or simulations, or is set to a predetermined flow rate by, for example, a flow rate adjusting valve provided on the upstream side of the tank 2. Here, the atmospheric fluid means a liquid accumulated in the tank 2, that is, condensed water. Further, the expected generation amount of the particles is obtained in order to know the height when the particles are settled and accumulated, and the generation amount and a gap (distance X) between the cap 6 and the tank 2 which will be described later are determined. It is possible to estimate the replacement time.

  In the second procedure, the speed at which the particles set in the first procedure settle in condensed water (sedimentation velocity Vd) is calculated by a predetermined calculation formula. The particle sedimentation velocity Vd may be obtained by experiments or simulations.

  In the third procedure, the flow velocity V of the atmospheric fluid is set so that the velocity is lower than the sedimentation velocity Vd of the particles calculated in the second procedure. In the fourth procedure, the passage area A of the atmospheric fluid is determined by dividing the flow rate Q of the atmospheric fluid set in the first procedure by the flow velocity V of the atmospheric fluid set in the third procedure.

  Here, the passage area A of the atmospheric fluid is an area through which condensed water as the atmospheric fluid passes. Specifically, the area formed between the outer periphery of the outlet port 5 as shown in FIG. 4 and the inner periphery of the lower flange 63 of the cap 6 or the lower end (circle) of the lower flange 63 as shown in FIG. Shape) and the area (cylindrical shape) formed between the bottom 22 of the tank 2 and the like.

  Finally, based on the passage area A determined in the fourth procedure shown in FIG. 3, the inner diameter D of the cap 6 (lower flange 63) and the distance X from the bottom 22 of the tank 2 to the lower flange 63 are set to a predetermined value. Determine by calculation formula (fifth procedure). By determining the inner diameter D and the distance X in this manner, the flow rate of the condensed water passing through the lower side and the inner side of the lower flange 63 becomes a constant flow rate (flow rate V lower than the settling velocity Vd described above). Then, the condensed water passes through the lower flange 63 and the inner side thereof at the flow velocity V in this way, so that the particles that are foreign matters are surely settled at the bottom 22 of the tank 2 at the settling velocity Vd higher than the flow velocity V. It becomes.

  Next, the effect | action by the foreign material separator 1 is demonstrated with reference to FIG. 1 and FIG. In the description of this action, the mixed liquid has already accumulated up to the liquid discharge port 5 c at the bottom 22 of the tank 2, and a predetermined amount of condensed water has accumulated on the drain trap 52. Suppose that

  As shown in FIG. 1, when exhaust gas enters from the upper part of the foreign matter separator 1, the exhaust gas is guided above the cap 6 by the guide 3 and released into the tank 2. The gas contained in the exhaust gas is filtered by the filter 4 and discharged to the outside from the exhaust port 21a. In addition, the mixed liquid contained in the exhaust gas flows down to the liquid level of the condensed water accumulated in the bottom 22 of the tank 2 through the roof 61 of the cap 6.

  And when a new liquid mixture is added to the condensed water which accumulates in the bottom part 22 in this way, what is a mass smaller than condensed water among the foreign materials contained in a new liquid mixture is shown in FIG. By floating as floating matter on the surface of the condensed water, the lower flange 63 of the cap 6 prevents entry into the cap 6. Further, foreign matter having a mass much larger than that of the condensed water sinks to the bottom 22 of the tank 2 as it is, and becomes a subsidence.

  Some foreign substances having a mass slightly larger than the condensed water float in the condensed water due to the time required for sedimentation. It tries to go out from the liquid discharge port 5c through the side and inside. However, since the inner diameter D of the lower flange 63 of the cap 6 and the distance X between the lower flange 63 and the bottom portion 22 are determined as described above in order to deal with the foreign matter floating in the condensed water, the foreign matter is Then, the liquid settles on the bottom 22 without reaching the liquid discharge port 5c.

  As described above, the foreign matter contained in the mixed liquid is blocked by the lower flange 63 or settles to the bottom 22 of the tank 2, so that only condensed water flows into the liquid discharge port 5 c. Then, by properly opening the drain trap 52 shown in FIG. 1, the condensed water accumulated on the drain trap 52 is discharged to the outside and reused.

According to the above, the following effects can be obtained in the first embodiment.
(1) The amount of foreign matter that can be blocked by the lower flange 63 of the cap 6 and the amount of foreign matter that can be accumulated in the bottom 22 of the tank 2 are larger than those of a conventional fine mesh filter. Because it is far more frequent, the frequency of maintenance can be reduced.
(2) Since the cap 6 may be coupled to the upper end of the outlet port 5 penetrated from the bottom 22 of the tank 2, for example, the cap 6 is positioned and coupled as compared with a structure in which the cap 6 is fixed to the side wall 21 of the tank 2. For example, when the cap is installed in another tank having a different inner diameter, the cap can be installed without changing the shape of the cap.

(3) Since the lower end of the lower flange 63 of the cap 6 is positioned below the liquid discharge port 5c by a predetermined distance, when the foreign matter is floating on the surface of the condensed water, the foreign matter tends to flow into the liquid discharge port 5c. Can also be reliably blocked by the lower flange 63 of the cap 6.
(4) Since the gas vent hole 63a is formed obliquely downward from the inner surface to the outer surface of the cap 6, for example, foreign matters mixed in the liquid mixture flowing down from the upper side of the tank 2 onto the cap 6 enter the gas vent hole 63a. It is prevented from passing through and entering the liquid discharge port 5 c disposed in the cap 6.

(5) By closing the drain trap 52 and storing a predetermined amount of condensed water above the drain trap 52, no gas leaks from the outlet port 5 to the outside. There is no need to provide a device, and the cost can be reduced accordingly.
(6) Even if a foreign substance floating in the condensed water has entered the cap 6, the speed of the condensed water passing through the lower and inner sides of the lower flange 63 of the cap 6 is lower than the sedimentation speed Vd of the foreign substance. It is possible to reliably prevent foreign matters from flowing into the liquid discharge port 5c.

[Second Embodiment]
Below, 2nd Embodiment of the foreign material separator which concerns on this invention is described. Since this embodiment is obtained by changing the shape of the cap 6 in the foreign matter separator 1 of the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the drawings to be referred to, FIG. 5 is a cutaway perspective view showing a foreign matter separator according to a second embodiment.

  As shown in FIG. 5, the cap 7 according to the second embodiment is a member formed in a substantially bottomed cylindrical shape, and a circular roof portion 71 formed in a horizontal plane and a center of the roof portion 71. The mounting flange 72 is formed so as to go upward from the periphery of the formed opening hole 71a, and the lower flange 73 is formed so as to go downward on the outer edge of the roof portion 71. That is, this cap 7 is formed so that the roof 71 becomes horizontal by extending the lower flange 63 of the first embodiment upward.

According to the above, the following effects can be obtained in the second embodiment.
Since the cap 7 has a simple shape such as a substantially bottomed cylindrical shape, the manufacturing becomes easy. However, since there is a possibility that the mixed liquid may accumulate in the roof portion 71, it is desirable to use the one in which the roof portion 61 is formed in a slope shape as in the first embodiment.

[Third Embodiment]
Below, 3rd Embodiment of the foreign material separator which concerns on this invention is described. Since this embodiment is obtained by changing a part of the foreign matter separator 1 according to the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the drawings to be referred to, FIG. 6 is an enlarged view of a main part showing a foreign matter separator according to a third embodiment.

  As shown in FIG. 6, a through hole 22b is formed in the bottom portion 22 of the tank 2, and a tubular drain port 8 is provided in the through hole 22b for discharging precipitated foreign matter to the outside. Yes. Then, by opening and closing a valve (not shown) provided at an appropriate position of the drain port 8, foreign matter that settles on the bottom 22 is appropriately discharged to the outside. In this embodiment, the drain port 8 is provided as it is in the bottom portion 22 that is substantially horizontal. However, the present invention is not limited to this, and for example, a portion where the drain port 8 is installed (a portion where the through hole 22b is formed). The bottom 22 may be formed so as to be lowered, that is, the bottom 22 may be formed in a conical shape having the through hole 22b as a vertex. According to this, foreign matter is easily collected on the drain port 8 side, and foreign matter can be efficiently discharged.

According to the above, the following effects can be obtained in the third embodiment.
As foreign matter is discharged from the drain port 8, foreign matter does not collect in the bottom portion 22, so that the distance between the open end of the cap 6 and the bottom portion 22 of the tank 2 can be reduced, and the entire tank can be downsized. Can do.

[Fourth Embodiment]
Below, 4th Embodiment of the foreign material separator which concerns on this invention is described. Since this embodiment is obtained by changing a part of the foreign matter separator 1 according to the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the drawings to be referred to, FIG. 7 is an enlarged view of a main part showing a foreign matter separator according to a fourth embodiment.

  As shown in FIG. 7, in the foreign material separator 1 according to the fourth embodiment, instead of forming the gas vent hole 63a in the cap 6 as in the first embodiment, the liquid discharge port in the cap 6 is formed. A gas vent pipe 9 that connects the space above 5 c and the outside of the tank 2 is provided. In addition, a mounting hole 22c is formed in the bottom portion 22 of the tank 2 for allowing the gas vent pipe 9 to pass through and be fixed.

According to the above, in the fourth embodiment, the following effects can be obtained.
By connecting the inside of the cap 6 and the outside of the tank 2 with the gas vent pipe 9, it is not necessary to form the gas vent hole 63 a in the cap 6, so that the gas leaking from the gas vent hole 63 a formed in the cap 6 is discharged to the outlet port. Therefore, the drain trap 52 for blocking with 5 is not necessary, and the cost can be reduced accordingly.

In addition, this invention is implemented in various forms, without being limited to the said embodiment.
In the present embodiment, the caps 6 and 7 are coupled to the outlet port 5 by the cylindrical mounting flanges 62 and 72, but the present invention is not limited to this. For example, the bottom of the bottomed cylindrical cap is the outlet. You may make it couple | bond so that it may cover the upper end of a port.
In the present embodiment, the foreign matter separator 1 is used in a fuel reforming power generation system, but the present invention is not limited to this and may be used in any system. Also, the installation location in the fuel reforming power generation system can be arbitrarily changed. For example, when recovering moisture in the fuel cell exhaust gas containing the phosphoric acid product with a phosphoric acid fuel cell power generation device or the like, phosphoric acid is used. A heat exchanger and a foreign matter separator 1 may be provided downstream of the fuel cell.
Further, the number of the liquid discharge ports 5c and the gas vent holes 63a may be any number.

  In the present embodiment, both the inner diameter D of the lower flange 63 of the cap 6 and the distance X from the bottom 22 of the tank 2 to the lower flange 63 are determined based on the passage area A, but the present invention is not limited to this. Only at least the inner diameter D has to be determined. Even in this case, the speed of the condensed water passing through the inside of the lower flange 63 is lower than the sedimentation speed Vd of the foreign matter, so that the foreign matter is not carried to the liquid discharge port 5c by the condensed water, and it is ensured. It will settle at the bottom 22 of the tank 2. However, if the distance X between the lower flange 63 and the bottom portion 22 of the tank 2 is determined as in this embodiment, the condensed water will pass through the lower flange 63 at a flow velocity V. It is possible to reliably deposit foreign matter.

It is a fracture perspective view showing a foreign material separator concerning a 1st embodiment. It is an expanded sectional view which shows the structure of the exit port vicinity of FIG. It is a figure which shows the procedure of the determination method of the distance X and the internal diameter D. FIG. It is sectional drawing which shows the passage area of atmospheric fluid. It is a fracture | rupture perspective view which shows the foreign material separator which concerns on 2nd Embodiment. It is a principal part enlarged view which shows the foreign material separator which concerns on 3rd Embodiment. It is a principal part enlarged view which shows the foreign material separator which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Foreign material separator 2 Tank 21 Side wall 21a Exhaust port 22 Bottom part 3 Guide 4 Filter 5 Outlet port 5a Exhaust path 5b Side wall 5c Liquid outlet 52 Drain trap 6 Cap 61 Roof part 62 Mounting flange 63 Lower flange 63a Gas vent hole 7 Cap 71 Roof portion 71a Opening hole 72 Mounting flange 73 Lower flange 8 Drain port 9 Gas vent pipe

Claims (8)

A foreign matter separator provided with a tank that is supplied with a mixed liquid in which foreign matter and liquid are mixed, and gas, and stores the mixed solution at the bottom and discharges the gas to the outside through an exhaust port formed at the top,
A liquid discharge means having a liquid discharge port disposed at a predetermined distance above the bottom of the tank and a discharge path for discharging the liquid flowing into the liquid discharge port to the outside;
A cap provided with the opening facing downward to cover the upper side and the side of the liquid outlet;
A foreign matter separator comprising: a gas vent that discharges gas confined in the cap by increasing the volume of the mixed liquid accumulated in the bottom of the tank to the outside of the tank. . The foreign matter separator according to claim 1,
The drainage means is a tubular outlet port provided so as to penetrate from the bottom of the tank, and the liquid discharge port is formed on the side wall thereof,
The foreign matter separator, wherein the cap is coupled to an upper end of the outlet port. The foreign matter separator according to claim 1 or 2,
An open end of the cap is formed so as to be positioned below a predetermined distance from the liquid discharge port. The foreign matter separator according to any one of claims 1 to 3,
The degassing part is
A foreign matter separator, wherein the foreign matter separator is a gas vent hole formed obliquely downward from an inner surface of the cap toward an outer surface at a position above the liquid discharge port on a side surface of the cap. The foreign matter separator according to claim 4,
In the outlet port,
A foreign matter separator comprising an openable and closable valve for blocking the liquid flow. The foreign matter separator according to any one of claims 1 to 3,
The degassing part is
A foreign matter separator, wherein the foreign matter separator is a gas vent pipe connecting a space above the liquid discharge port in the cap and the outside of the tank. The foreign matter separator according to any one of claims 1 to 6,
A foreign matter separator having a drain port for discharging foreign matter that precipitates at the bottom of the tank. The foreign matter separator according to any one of claims 1 to 7,
The area formed by the open end of the cap and the drainage means is:
A flow rate of the mixed solution supplied into the tank;
The foreign matter separator is calculated based on a speed smaller than the sedimentation speed of the foreign matter in the mixed liquid.

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