JP6009276B2 - Gas-liquid separator - Google Patents

Description

  The present invention relates to a gas-liquid separator used when separating a liquid from a gas when the liquid sucked by a blower or the like contains a liquid.

  Conventionally, there are two methods of using blowers: suction (negative pressure) for sucking out an object using suction force, and discharge (positive pressure) for pushing out an object using discharge pressure. When a blower is used in a gas suction application, for example, a gas in a space where a gas containing a liquid exists may be sucked by the blower. If the gas to be sucked contains liquid, the blower sucks both the gas and liquid under the condition that no action is taken on the upstream side of the blower. Not only can the original suction performance not be obtained, but the rotational load of the blower may increase and the operating current of the motor may increase. Furthermore, in the long term, the chemical properties of the liquid may lead to problems such as corrosion and damage to the blower impeller and casing.

  Therefore, it is necessary to take measures so that the gas and the liquid are separated from the upstream side of the suction port of the blower and the gas not containing the liquid is sucked into the blower.

  There are various apparatuses for separating a gas and a liquid. For example, those disclosed in Patent Documents 1 and 2 are known. Patent Document 1 discloses a flue gas treatment apparatus that separates mist-like fine particles and oil (liquid component) contained in flue gas from an incineration facility or the like from gas components.

  This smoke exhausting treatment apparatus is provided with a filler consisting of a collection of minute solid bodies in a rotating structure, and the introduced exhaust smoke collides with the filler to condense the liquid component into the filler, thereby Gas components are separated from each other. The liquid component condensed in the filler is spun off from the filler by rotating the rotating structure and using centrifugal force, and collides with a plate-like grid arranged in an inclined state with respect to the tangent to the rotating structure. And trapped, thereby increasing the particle size to a liquid and allowing it to flow naturally.

  Patent Document 2 discloses a mist dust collecting device that removes mist such as oil discharged from a processing facility and contained in the air. In the apparatus of Patent Document 2, a separation plate assembly in which a plurality of separation plates in which a large number of air holes are formed is stacked is disposed on a case body, and a gas containing mist is caused to collide with the separation plate so that liquid components are separated by the separation plate. It is captured as a droplet and allowed to flow down naturally as a liquid.

JP 2011-230012 A JP 2011-189326 A

  However, since the liquid component is condensed in the filler in the flue gas treatment apparatus of Patent Document 1, the liquid component cannot be separated from the flue gas unless the liquid condensed in the filler is removed. Therefore, in order to remove the condensed liquid component from the filler, it is necessary to apply a rotational force to the rotating structure to rotate the rotating structure, and to move the liquid component to the outer peripheral side of the rotating structure by the centrifugal force. , Energy is needed to apply rotational force.

  Moreover, in the mist dust collector of patent document 2, a certain amount of time is required until the mist captured by the separation plate grows to a size that falls by its own weight, and the mist is captured by the separation plate. It is considered that the efficiency of trapping the mist by the separator plate is low while it flows down gradually.

  Further, when foreign particles in the gas adhere to the separation plate, it is necessary to remove them with a separate cleaning nozzle, which causes a problem that the apparatus becomes complicated and leads to an increase in cost.

  The present invention has been made in view of such points, and the object of the present invention is to efficiently discharge the separated liquid so as not to deteriorate the gas-liquid separation performance when the gas containing the liquid is sucked by the blower. Another object of the present invention is to provide a gas-liquid separation device that can prevent blower damage and corrosion.

  In order to achieve the above object, in the present invention, a liquid separated from a gas can be discharged by an ejector.

Specifically, the first invention is a gas-liquid separation device that is disposed on the upstream side of the suction blower and separates the liquid contained in the gas sucked by the suction blower from the gas,
A capture member accommodating portion for accommodating a capture member that captures a liquid contained in the gas by allowing the gas to pass therethrough;
A suction pipe that sucks in the gas containing the liquid and communicates with the upstream side in the gas flow direction of the capturing member housing;
A discharge pipe for communicating with the downstream side in the gas flow direction of the capture member housing portion, and for discharging the gas that has passed through the capture member to the suction blower;
A liquid suction tube for sucking the liquid captured by the capture member;
And an ejector that is connected to the downstream side of the liquid suction pipe in the liquid flow direction and discharges the liquid inside the liquid suction pipe.

  According to this configuration, the gas containing the liquid is sucked into the suction pipe, flows into the upstream side of the capturing member housing portion in the gas flow direction, and passes through the capturing member. When passing through the capture member, the liquid is captured by the capture member, while the gas is sucked into the suction blower via the discharge pipe from the downstream side in the gas flow direction of the capture member housing portion. Therefore, the suction of the liquid to the suction blower is suppressed.

  The liquid separated from the gas is discharged using the negative pressure generated by increasing the gas flow velocity of the ejector. That is, since the negative pressure generated inside the ejector also acts inside the liquid suction pipe to which the ejector is connected, the liquid is efficiently sucked into the liquid suction pipe, and the trapping member It becomes possible to suck the trapped liquid effectively. Therefore, the liquid does not remain in the capturing member, and high gas-liquid separation performance can be maintained.

  And since the liquid inside a liquid suction tube is discharged | emitted from an ejector outside, the energy for applying a rotational force like the prior art is not required. In this way, it is possible to reliably discharge the captured liquid while providing a simple configuration in which an ejector is provided.

According to a second invention, in the first invention,
The ejector is connected to a discharge side of the suction blower, and generates a negative pressure by a gas discharged from the suction blower to discharge the liquid inside the liquid suction tube. .

  According to this configuration, when the suction blower is in operation, it becomes possible to discharge the liquid inside the liquid suction pipe using the gas discharged from the suction blower, and a blower or the like is separately provided. There is no need to provide it.

According to a third invention, in the first or second invention,
The capturing member is a spiral member formed by forming a wire rod in a spiral shape.

  According to this configuration, the gas containing the liquid passes through the spiral member. At this time, the flow of the gas is complicated, and the liquid in the gas surely comes into contact with the wire. Efficiently captured by the wire. Moreover, since the space | interval which can pass gas can fully be ensured in the capture member by making the wire rod helical, it also becomes possible to suppress the pressure loss of gas.

  According to the first aspect of the present invention, the gas containing the liquid is separated into gas and liquid by passing through the capturing member, the gas is discharged from the discharge pipe to the suction blower, and the liquid is sucked by the ejector connected thereto. Since the suction is performed by the tube, the liquid can be efficiently and reliably separated from the gas. Therefore, it is possible to avoid deterioration of gas-liquid separation performance and prevent blower damage and corrosion without using a complicated structure and without requiring energy to apply rotational force as in the conventional example. can do.

  According to the second aspect of the invention, since the ejector is connected to the discharge side of the suction blower, the liquid inside the liquid suction tube can be discharged using the gas discharged from the suction blower. It can be made even simpler.

  According to the third aspect of the invention, since the trapping member is constituted by the spiral member formed by forming the wire rod in a spiral shape, the gas-liquid separation performance can be sufficiently enhanced while not greatly hindering the gas flow. .

It is a top view explaining the use condition of the gas-liquid separation device concerning an embodiment. It is the figure which looked at the gas-liquid separator from the ejector side. It is the figure which looked at the gas-liquid separator from the discharge side. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is the figure which looked at the gas-liquid separation apparatus of the state which removed the lower board from the lower side. It is the figure which looked at the gas-liquid separation apparatus of the state which removed the upper board from the upper side.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a diagram for explaining a use state of a gas-liquid separator 1 according to an embodiment of the present invention. The gas-liquid separator 1 is used together with the suction blower 100. The suction blower 100 is a suction blower that sucks air (gas) using suction force. The suction blower 100 has a conventionally known structure in which an impeller and an electric motor (both not shown) are accommodated in a casing 100a. The casing 100a is formed with a suction hole for sucking air and a discharge hole (both not shown) for discharging air. A suction hose 101 is connected to the suction hole of the casing 100a. A discharge hose 102 is connected to the discharge hole of the casing 100a. The suction hose 101 and the discharge hose 102 can be constituted by pipes and can be freely set.

  The gas-liquid separation device 1 is disposed on the upstream side of the suction blower 100 in the air flow direction, and separates the liquid contained in the air sucked by the suction blower 100 from the gas. Examples of the liquid include water, oil, and the like, which can be separated from the air by the gas-liquid separator 1 when these are contained in the air in the form of mist or droplets.

  As shown in FIGS. 2 to 4, the gas-liquid separation device 1 includes a casing 10, a suction pipe 11, a discharge pipe 12, a liquid suction pipe 13, and an ejector 14. A capturing member accommodating space (capturing member accommodating portion) 16 for accommodating the capturing member 15 that captures the liquid is defined.

  The casing 10 is a cylindrical thing extended in an up-down direction, and as shown in FIG. 4, the upper end and lower end of the casing 10 are obstruct | occluded by the upper board 20 and the lower board 21, respectively. A suction pipe insertion hole 10 a into which the suction pipe 11 is inserted and a discharge pipe insertion hole 10 b into which the discharge pipe 12 is inserted are formed in the lower part of the peripheral wall portion of the casing 10. The suction pipe insertion hole 10 a and the discharge pipe insertion hole 10 b are separated by 180 ° in the circumferential direction of the casing 10. Furthermore, a liquid suction pipe insertion hole 10c into which the liquid suction pipe 13 is inserted is formed between the suction pipe insertion hole 10a and the discharge pipe insertion hole 10b at the lower portion of the peripheral wall portion of the casing 10.

  Inside the casing 10, a first partition plate 25 is provided above the suction pipe insertion hole 10 a and the discharge pipe insertion hole 10 b, and the second partition plate 26 is located at a position away from the first partition plate 25. Is provided. The first partition plate 25 extends substantially horizontally, and the outer shape is substantially circular so as to be close to the inner peripheral surface of the casing 10. The first partition plate 25 is held by the discharge pipe 12. A space between the first partition plate 25 and the lower plate 21 in the casing 10 is an air inflow space R1.

  A central hole 25a is formed at the center of the first partition plate 25 so as to penetrate in the vertical direction. Further, as shown in FIG. 6, a large number of through holes 25b, 25b,... Penetrating in the vertical direction are spaced apart from each other in the circumferential direction and the radial direction in the portion outside the center hole 25a of the first partition plate 25. Is formed. Further, a liquid suction tube insertion hole 25c through which the liquid suction tube 13 is inserted is formed in the outer portion of the first partition plate 25 from the center hole 25a so as to penetrate in the vertical direction.

  Similar to the first partition plate 25, the second partition plate 26 extends substantially horizontally and is held by the discharge pipe 12. A space between the second partition plate 26 and the upper plate 20 in the casing 10 is an upper space R2.

  As shown in FIG. 4, a center hole 26 a is formed at the center of the second partition plate 26 so as to be positioned substantially concentrically with the center hole 25 a of the first partition plate 25 in plan view. Further, a plurality of through holes 26b, 26b,..., And a liquid suction pipe insertion hole 26c (shown in FIG. 7) through which the liquid suction pipe 13 is inserted are formed on the outer side of the center hole 26a of the second partition plate 26. Is formed. The liquid suction tube insertion hole 26c of the second partition plate 26 and the liquid suction tube insertion hole 25c of the first partition plate 25 are located substantially concentrically in plan view.

  As shown in FIG. 4, the space between the first partition plate 25 and the second partition plate 26 in the casing 10 is a capturing member accommodating space 16. The lower side of the capturing member accommodation space 16 is the upstream side in the air flow direction, and the upper side is the downstream side. The capturing member 15 accommodated in the capturing member accommodating space 16 is configured by a spiral member formed by forming a wire rod in a spiral shape. The thickness of the wire is preferably a thin one of 1.0 mm or less, for example. The outer diameter of the spiral portion is preferably a small diameter of 10 mm or less, for example. As the material of the wire, a metal having high corrosion resistance is preferable, and examples thereof include stainless steel. It is preferable that the shape of the spiral portion is dense so that adjacent spiral portions are close to each other. Further, it is preferable that the capturing member 15 is accommodated by being pushed into the capturing member accommodating space 16 so that the gap becomes small.

  The suction pipe 11 is inserted into the suction pipe insertion hole 10a with the center line extending substantially horizontally, and the outer peripheral surface of the suction pipe 11 is bonded to the peripheral edge of the suction pipe insertion hole 10a over the entire circumference. . The length of the suction pipe 11 is set to be short so that the end portion inside the casing 10 of the suction pipe 11 is located outside the center portion of the casing 10. The suction pipe 11 communicates with the air inflow space R1 and communicates with the upstream side in the air flow direction of the capturing member accommodation space 16 through the air inflow space R1 and the through holes 25b, 25b,. Yes. Therefore, the entire amount of air containing the liquid sucked into the casing 10 flows into the capturing member accommodation space 16. A hose 104 is connected to the upstream side of the suction pipe 11, and air containing liquid is sucked through the hose 104.

  The discharge pipe 12 is for discharging the air sucked into the casing 10 from the suction pipe 11 to the outside of the casing 10 and supplying it to the suction blower 100. The discharge pipe 12 is formed in a substantially L shape having a vertical pipe portion 12a extending in the vertical direction and a horizontal pipe portion 12b extending in a substantially horizontal direction from the lower end portion of the vertical pipe portion 12a.

  The vertical pipe portion 12 a is inserted into the center hole 25 a of the first partition plate 25 and the center hole 26 a of the second partition plate 26. The outer peripheral surface of the vertical pipe portion 12a is bonded to the peripheral edge portions of both center holes 25a and 26a. The upper end portion of the vertical pipe portion 12a protrudes upward from the center hole 26a of the second partition plate 26 and is open. Therefore, the discharge pipe 12 communicates with the upper space R2 and communicates with the downstream side in the air flow direction of the capturing member accommodation space 16 via the upper space R2 and the through hole 26b of the second partition plate 26.

  The horizontal tube portion 12b is inserted into the discharge tube insertion hole 10b, and the outer peripheral surface of the horizontal tube portion 12b is bonded to the peripheral portion of the discharge tube insertion hole 10b over the entire circumference.

  The liquid suction tube 13 is for sucking the liquid captured by the capturing member 15, and extends in a vertical direction at a portion that is radially displaced from the center line inside the casing 10. The lower side of the liquid suction tube 13 is inserted into the liquid suction tube insertion hole 25c of the first partition plate 25, and the upper side of the liquid suction tube 13 is inserted into the liquid suction tube insertion hole 26c of the second partition plate 26. Is held. The upper end portion of the liquid suction tube 13 is closed by a cap 13b.

  A number of suction holes 13a, 13a,... Are formed in the liquid suction tube 13 at intervals. The suction hole 13 a located in the capture member accommodation space 16 can directly suck the liquid in the capture member accommodation space 16. Further, the lower portion of the liquid suction tube 13 is close to the lower plate 21, bent into an L shape, and inserted into the liquid suction tube insertion hole 10 c of the casing 10. The outer peripheral surface of the liquid suction tube 13 is bonded to the peripheral edge of the liquid suction tube insertion hole 10c over the entire periphery. As shown in FIG. 5 and FIG. 6, the suction hole 13 a is also provided in the lower part of the liquid suction pipe 13 so that the liquid accumulated at the bottom of the casing 10 can also be sucked.

  The ejector 14 is for discharging the liquid to the outside of the casing 10 by utilizing the negative pressure generated inside by increasing the flow rate of the air introduced into the inside thereof. As shown in FIG. 5, the ejector 14 includes an introduction tube portion 30 into which air is introduced, a discharge tube portion 31 through which air and liquid are discharged, and a suction tube portion 32 that sucks liquid. . The suction tube portion 32 is connected to the lower end portion (downstream end portion) of the liquid suction tube 13 and projects in the radial direction of the casing 10 toward the outside of the casing 10. The discharge pipe part 31 is connected to the downstream end of the suction pipe part 32 and extends in a direction substantially orthogonal to the suction pipe part 32 and substantially horizontally. The introduction pipe part 30 is also connected to the downstream end of the suction pipe part 32. Further, the introduction pipe part 30 is also connected to the discharge pipe part 31, and extends in a direction substantially orthogonal to the suction pipe part 32 and in a direction opposite to the discharge pipe part 31.

  The introduction pipe portion 30 is provided with a flow velocity improving member 40 for increasing the flow velocity of air. The flow velocity improving member 40 includes a conical portion 41 that extends from the upstream end of the introduction pipe portion 30 in the air flow direction toward the downstream side and decreases in diameter toward the downstream side. A small hole 42 is formed at the tip of the conical portion 41. The air flow passage is gradually narrowed toward the downstream side by the conical portion 41 of the flow velocity improving member 40, thereby improving the flow velocity. The tip of the cone-shaped part 41 extends to a part corresponding to the suction pipe part 32.

  Further, a connection portion 43 to which a downstream end of a discharge hose 102 (shown in FIG. 1) extending from the suction blower 100 is connected is provided at the upstream end of the flow velocity improving member 40 in the air flow direction.

  Next, the case where the gas-liquid separation apparatus 1 comprised as mentioned above is used is demonstrated. When the suction blower 100 is operated, air containing liquid is sucked from the suction hose 101 and flows into the air inflow space R1 inside the casing 10 from the suction pipe 11 shown in FIG.

  On the other hand, the air discharged from the discharge hose 102 of the suction blower 100 is introduced into the introduction pipe portion 30 of the ejector 14 shown in FIG. 5 and flows in the conical shape portion 41 of the flow velocity improving member 40 so that the flow velocity gradually increases. Go. Then, it flows out from the small hole 42 of the conical portion 41 to the discharge pipe portion 31. At this time, since the small hole 42 is located at a portion corresponding to the suction pipe portion 32 of the ejector 14, a negative pressure is generated near the downstream end of the suction pipe portion 32, and the suction pipe portion 32 is generated by this negative pressure. The air inside is sucked out and discharged from the ejector 14 through the discharge pipe portion 31 together with the air flowing out from the small hole 42. Accordingly, when the suction blower 100 is operated, a negative pressure is generated inside the liquid suction tube 13, and a suction force is generated in the suction hole 13 a of the liquid suction tube 13.

  Further, the air that has flowed into the air inflow space R1 shown in FIG. 4 flows into the capturing member housing space 16 from the through holes 25b, 25b,... Of the first partition plate 25 and passes through the capturing member 15. Since the capturing member 15 is formed by forming a wire rod in a spiral shape, the flow of air is complicated, and the liquid in the air reliably contacts the wire rod, so that the liquid contained in the air is efficiently captured by the wire rod. It is condensed. The condensed liquid is sucked from the suction hole 13 a of the liquid suction tube 13.

  A part of the liquid captured by the capturing member 15 drops on the first partition plate 25 and accumulates on the upper surface of the lower plate 21 of the casing 10 through the through holes 25b, 25b, ... of the first partition plate 25. There is a case to go. The liquid accumulated on the upper surface of the lower plate 21 is sucked from the suction hole 13 a below the liquid suction pipe 13.

  The liquid sucked into the suction hole 13a of the liquid suction pipe 13 flows downstream due to the negative pressure in the liquid suction pipe 13, flows through the suction pipe portion 32 of the ejector 14 shown in FIG. To reach. Since air with an increased flow velocity flows in the discharge pipe portion 31, the liquid is vigorously discharged from the discharge pipe portion 31 together with this air. Therefore, in the present embodiment, energy for applying a rotational force as in the conventional example is not required. In addition, the captured liquid can be reliably discharged while the simple configuration of providing the ejector 14 is provided.

  The air in the casing 10 flows into the capturing member housing space 16 and passes through the capturing member 15 as described above. At this time, the capturing member 15 is formed by forming a wire in a spiral shape. Therefore, it is possible to secure a sufficient space in the capturing member 15 through which air can pass. Therefore, the pressure loss of air can be suppressed.

  The air in the capture member accommodation space 16 flows through the through holes 26b, 26b,... Of the second partition plate 26 and flows into the upper space R2. The air flowing into the upper space R2 contains almost no liquid, and this air flows through the discharge pipe 12 and is sucked into the suction blower 100 via the suction hose 101 shown in FIG. Therefore, it is possible to suppress the liquid from adhering to the impeller and casing of the suction blower 100, and it is possible to prevent corrosion and damage.

  As described above, according to the gas-liquid separation device 1 according to this embodiment, air containing liquid is gas-liquid separated by passing the capturing member 15, and the gas is sucked from the discharge pipe 12. Since the liquid is supplied to the blower 100 and sucked by the liquid suction pipe 13 to which the ejector 14 is connected, the liquid can be efficiently and reliably separated from the gas. Therefore, it is possible to avoid a decrease in gas-liquid separation performance and to prevent damage and corrosion of the suction blower 100.

  Further, since the ejector 14 is connected to the discharge side of the suction blower 100, the liquid inside the liquid suction tube 13 can be discharged using the air discharged from the suction blower 100, and the configuration is further simplified. Can be.

  In addition, since the capture member 15 is formed of a spiral member formed by forming a wire in a spiral shape, the gas-liquid separation performance can be sufficiently enhanced while not greatly hindering the air flow.

  The gas-liquid separation device 1 can be used when separating oil or moisture contained in air from air, or when separating liquid from gas when a liquid other than air contains liquid. Can be widely applied to.

  Further, the capture efficiency of the liquid can be increased by changing the shape or wire diameter of the capture member 15 according to the properties of the liquid, or by changing the filling amount of the capture member 15.

  As described above, the gas-liquid separation device according to the present invention can be used when, for example, air containing liquid or liquid is separated.

DESCRIPTION OF SYMBOLS 1 Gas-liquid separation apparatus 10 Casing 11 Intake pipe 12 Discharge pipe 14 Ejector 15 Capture member 16 Capture member accommodation space (capture member accommodation part)
100 Blower for suction 101 Suction hose 102 Discharge hose R1 Air inflow space R2 Upper space

Claims (3)

A gas-liquid separation device disposed on the upstream side of the suction blower, for separating the liquid contained in the gas sucked by the suction blower from the gas,
A capture member accommodating portion for accommodating a capture member that captures a liquid contained in the gas by allowing the gas to pass therethrough;
A suction pipe that sucks in the gas containing the liquid and communicates with the upstream side in the gas flow direction of the capturing member housing;
A discharge pipe for communicating with the downstream side in the gas flow direction of the capture member housing portion, and for discharging the gas that has passed through the capture member to the suction blower;
A liquid suction tube for sucking the liquid captured by the capture member;
A gas-liquid separation device comprising: an ejector connected to the downstream side of the liquid suction pipe in the liquid flow direction and discharging the liquid inside the liquid suction pipe. In the gas-liquid separation device according to claim 1,
The ejector is connected to a discharge side of the suction blower and generates a negative pressure by a gas discharged from the suction blower to discharge the liquid inside the liquid suction pipe. apparatus. In the gas-liquid separation device according to claim 1 or 2,
The gas-liquid separation device, wherein the capturing member is a spiral member formed by forming a wire rod in a spiral shape.

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