JP2007307475A - Cyclone separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cyclone separator which can suppress the length of a body vessel, and at the same time, can surely separate a separation object. <P>SOLUTION: The cyclone separator comprises the cylindrical body vessel 1 in which the central axis is installed vertically, an inhalant canal 7 provided on an axial direction upstream side of the body vessel 1 tangentially to a circumferential wall surface of the body vessel, and introducing a fluid containing the separation object, an exhalent canal 10 flowing out the fluid from which the separation object is separated, an exhaust pipe 9 provided on an axial direction lower end side of the body vessel 1 tangentially to the circumferential wall surface of the body vessel 1, and discharging the separation object, and a cylindrical cyclone element 6 provided coaxially to the body vessel 1 inside the body vessel 1, in which an opening portion 6c and the exhalent canal 10 are provided respectively at the upper end side and at the lower end side, and the lower end side is connected with the exhalent canal 10. A tapered surface of a large diameter increasing toward the axial direction upper side is formed on the outer surface of the cyclone element 6, and a ring-shaped projection 6d is provided on the tapered surface, which enables a control of a lifting of the separation object along the outer surface. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cyclone separator for removing a separation target from a fluid containing the separation target flowing in from an inflow pipe and flowing out.

  Such cyclone separators are used in various industrial fields. For example, it is necessary when separating solids and liquids in the post-process of reaction products, unreacted substances, and crystallization in chemical plants and food plants. In addition, it is necessary to separate and remove foreign substances from water in the fields of thermal power, hydropower, nuclear power generation, steelmaking, chemicals, papermaking and other industries, water and sewage treatment, waste recycling, and agriculture.

  In addition, the removal of dust in the air is required in terms of the quality of products manufactured in the factory and in terms of maintaining a good working environment, and separation of gas (air) and solid or liquid is necessary in the manufacturing process. It becomes. Furthermore, separation of solids and liquids in air or gas is necessary in combustion, chemical reaction, grinding, and transportation processes. In addition, for environmental conservation, gas-liquid separation is necessary for removing dust in the air or liquid, improving raw material purity, removing fine powder that hinders processing, and the like. Furthermore, separation of solids and liquids in air and gas is necessary in combustion, chemical reaction, pulverization, and transportation processes.

  As described above, a cyclone separator is known as an apparatus intended to separate an object to be separated from a gas or a liquid (which corresponds to a fluid). This apparatus is configured to generate a swirling flow and to separate a separation object from a fluid by centrifugal force.

  As an example of such a cyclone separator, there is a cyclone separator shown in Patent Document 1 below. This device separates fine powder suspended in a gas stream, a cylindrical chamber with a vertical axis, an outlet for precipitated material having a downward taper at the bottom of the chamber, and a top of the chamber. It is provided with a central outlet for the gas provided, a tangentially arranged inlet duct for introducing the gas flow into the upper part of the side wall of the chamber, and means for imparting a deflection force to change the gas flow downwards.

  The cyclone type oil separation device disclosed in the following Patent Document 2 is arranged on a cylindrical main body container and an upper part of the cylindrical main body container for the purpose of separating and removing oil contained in the gas flow. A tapered pipe, an inflow pipe that is arranged in the vicinity of the tapered pipe and for flowing gas from the tangential direction of the main body container, a downwardly tapered portion provided in the lower part of the main body container, and the outermost pipe of the main body container. A collection hopper disposed in the lower part and a gas outlet pipe provided in the upper part of the main body container are provided.

  Furthermore, the liquid cyclone type separation device disclosed in the following Patent Document 3 is intended to separate solid foreign substances in a liquid by centrifugal force, and has a cylindrical main body container and a taper disposed at the lower part of the main body container. And an inflow pipe provided at the upper end portion of the main body container, a foreign substance outlet provided at the lower end of the taper portion, and an outflow pipe provided at the center of the upper end of the main body container.

Japanese Patent No. 2690319 JP-T-2002-540338 JP-A-1-176464

  The problems in the above prior art will be described. In these Patent Documents 1, 2, and 3, a tapered container portion (inverted conical portion) having a downward taper is provided at the lower portion of the main body container, and the separated object that has been centrifuged is lowered from the tip of the lowermost portion. However, such a configuration has a problem that the tapered container portion must be lengthened. The fluid flowing in from the inflow pipe descends while swirling, and the separation object descends while being separated by centrifugal force. However, if the inverse conical taper angle is large, the separated separation object that swirls its container wall surface position. This is because a force acts to lift (back flow) the object along the taper. Therefore, it is necessary to reduce the taper angle of the tapered container portion, and as a result, there arises a problem that the length of the tapered container portion becomes long. Therefore, when installing a cyclone separator that requires a large capacity, if there is a restriction on the height of the indoor ceiling or if indoor installation is difficult, it is necessary to install a long pipe, a large capacity pump, or a blower. As a result, power loss is significant.

  This invention is made | formed in view of the said situation, The subject is providing the cyclone separator which can isolate | separate a separation target object reliably while being able to suppress the length of a main body container. is there.

In order to solve the above problems, a cyclone separator according to the present invention is:
A cylindrical body container with a central axis installed vertically;
An inflow pipe that is provided tangentially to the circumferential wall surface of the main body container on the upper end side in the axial direction of the main body container, and introduces a fluid containing a separation object;
An outflow pipe through which the fluid from which the separation object is separated flows out;
A discharge pipe that is provided tangentially to the circumferential wall surface of the main body container on the lower end side in the axial direction of the main body container, and discharges the separation object;
Provided coaxially with the main body container in the main body container, provided with an opening on the upper end side and the outflow pipe on the lower end side, respectively, and a cylindrical cyclone element connected to the outflow pipe on the lower end side,
On the outer surface of the cyclone element, a taper surface having a larger diameter is formed toward the upper side in the axial direction, and a ring-shaped projecting portion is provided on the taper surface so that the separation object is along the outer surface. It is characterized in that it can be prevented from rising.

  The operation and effect of the cyclone separator having this configuration will be described. A cylindrical main body container is provided, and an inflow pipe provided tangential to the circumferential wall surface of the main body container is provided on the upper end side in the axial direction. Since the fluid flows in from the tangential direction, the fluid forms a swirl flow inside the main body container. A cyclone element is provided coaxially with the main body container, and a tapered surface is formed on the outer surface thereof. Since this tapered surface has a larger diameter on the upper side in the axial direction, when the fluid introduced from the inflow pipe collides with the tapered surface, the fluid is deflected downward in the axial direction of the main body container. By the action of the tapered surface, the fluid moves in the downward direction of the main body container, that is, in the direction in which the discharge pipe is provided, while swirling. Further, due to the action of centrifugal force at the time of turning, the separation object (liquid or solid having a higher specific gravity than the fluid) contained in the fluid moves toward the discharge pipe while being aggregated on the inner wall surface of the main body container. To go. The discharge pipe is attached to the lower end in the axial direction of the main body container in a tangential direction with respect to the circumferential wall surface, and the foreign matter aggregated on the inner wall surface is discharged together with the fluid from the discharge pipe by the swirling force of the swirling flow. The cyclone element is provided with an opening on the upper end side, and the position of the opening is higher than the position of the inflow pipe. Therefore, the fluid flowing in from the inflow pipe does not go directly to the opening, but is once deflected downward by the taper surface to remove the separation target, and then enters the opening and flows out connected to the cyclone element. The separation object is discharged from the pipe in a removed form.

  On the other hand, the properties of the swirling flow will be described. Immediately after flowing in from the inflow pipe, the position near the inner wall surface of the main body container is the forced vortex that swirls at the highest speed, and the swirling flow is lowered in the axial direction by the action of the tapered surface. The more you move to the side, the closer to the natural vortex. Contrary to forced vortices, natural vortices become slower as the vortex center moves away from the center. Therefore, although it is a forced vortex in the vicinity of the inflow pipe, it becomes a Rankine vortex in which the natural vortex and the forced vortex are combined as it goes downward, and the nature of the natural vortex becomes stronger as it goes downward. When compared in terms of the magnitude of the pressure, in the vicinity of the inner wall surface, the upper part is a high pressure and the lower part is a low pressure due to the difference in the nature of the vortex. Therefore, the fluid tries to move downward also by this pressure difference. On the contrary, when viewed from the center of the vortex, the opening of the main body container approaches a natural vortex, so that the lower portion is in a high pressure state and the upper portion is in a low pressure state. Therefore, when viewed from the center of the vortex, the fluid tends to move upward and the separation target also moves upward. However, since there is actually a cyclone element at the center of the vortex, the harmful effect of natural vortex, that is, The state in which the separation object is about to move upward can be alleviated.

  Furthermore, even if the separation object that could not be completely removed is going to rise along the outer surface of the cyclone element, the taper surface of the cyclone element is provided with a ring-shaped protrusion, and the separation object is Acts as a barrier when ascending. Thereby, the separation probability of the separation object can be further increased. Moreover, according to the structure of this invention, it is not necessary to provide a further tapered container in the lower part of a main body container, and it is possible to isolate | separate and remove a separation target object reliably. As a result, it is possible to provide a cyclone separator that can suppress the length of the main body container and can reliably separate the separation object.

  In the present invention, the terms “upper end side and lower end side” of the main body container are used, but the main body container is divided into two regions by a horizontal line in the middle of the height direction, and the upper side of this horizontal line is defined as the upper end side. The lower side is defined as the lower end side.

  In the present invention, the cyclone element is preferably provided with a cylindrical surface above and / or below the tapered surface.

  For example, a cylindrical surface is provided above the tapered surface of the cyclone element. By providing an additional cylindrical surface as compared with the configuration having only the tapered surface, it is possible to increase a region that becomes a forced vortex. As mentioned above, the nature of the swirl flow moves from the forced vortex to the natural vortex as it goes downward. However, by providing the cylindrical surface on the upper side, the area of the forced vortex increases. Even when the difference between the specific gravity of the object and the specific gravity of the fluid is small, or even when the particle size of the separation object is small, the separation can be reliably performed.

  In addition, by providing the cylindrical surface below the tapered surface of the cyclone element, the volume ratio of the lower portion of the main body container can be increased without reducing the angle of the tapered surface (becoming more vertical). Therefore, for example, when a large amount of separation object is generated, that is, when the concentration of the separation object in the fluid is high, the foreign matter can be efficiently discharged from the discharge pipe. Further, according to the above configuration, the fluid flowing in from the inflow pipe can be strongly deflected downward by making the angle of the tapered surface large, and when the amount of separation objects is large or the concentration is high It can be reliably separated.

In the present invention, a tapered tube is provided on the upper side of the cyclone element, and the tapered tube is formed with a second tapered surface having a larger diameter toward the upper side in the axial direction.
The fluid from which the separation object has been removed moves from the inside of the cyclone element to the outflow pipe through a gap formed between the lower end side of the taper tube and the upper end side of the cyclone element, and the second It is preferable that the inflow pipe is disposed so as to face the tapered surface.

  Such a tapered tube is provided on the upper end side of the cyclone element separately from the cyclone element. The fluid flowing in from the inflow pipe is deflected downward by the action of the tapered surface formed in the taper pipe. By providing such a tapered tube, it is possible to prevent the fluid flowing in from the inflow tube from turning directly to the outflow tube from the opening above the cyclone element. Moreover, since it is a taper pipe | tube with a larger diameter than a cyclone element, the fluid which flowed in can be deflected below and an inner wall face side, and the separation efficiency of a separation target object can be improved.

  In the present invention, it is preferable to provide overhanging means that protrudes from the inner wall surface of the inflow pipe at the junction between the main body container and the inflow pipe, and to prevent the inflowing fluid from moving toward the cyclone element.

  By providing the overhanging means, more of the fluid that has flowed in can be directed toward the inner wall surface of the main body container. Further, since the area of the inlet is reduced, the inflow speed can be increased. Thereby, the turning speed of the swirling flow can be further increased, and the separation efficiency of the separation object can be increased.

  In the present invention, it is preferable that a turning restriction means for restricting the turning of the fluid is provided inside the upper side of the cyclone element.

  By providing such a turning restriction means, turning inside the cyclone element can be restricted, so that a shear rate difference is generated at the opening in the upper part of the element, and the action of suppressing the inflow of fluid is performed. Further, it is effective for increasing the volume of the cyclone element when it is difficult to separate the fluid and the separation object due to a small specific gravity difference. That is, when the cyclone element is enlarged, vibration can be prevented by providing the turning restricting means.

  A preferred embodiment of a cyclone separator according to the present invention will be described with reference to the drawings.

<First Embodiment>
<Configuration>
FIG. 1 is a diagram illustrating a configuration of a cyclone separator according to the first embodiment. FIG. 1A is a front view (including a cross-sectional view in a direction perpendicular to the axis), and (b) is a side view (including a cross-sectional view along the axial direction). This embodiment is used for the purpose of removing earth and sand from contaminated water at a civil engineering work site mixed with earth and sand (corresponding to a separation object).

  The main body container 1 is formed in a cylindrical shape, and its axis y is installed in a vertical state (vertical placement). A flange 1 a is provided on the upper end side of the main body container 1, and the container lid 2 is coupled by a bolt / nut 3. A flange 1 b is also provided on the lower end side of the main body container 1, and the bottom cover 4 is coupled by bolts and nuts 5. The body container 1 is preferably made of steel such as SS400. A soft rubber lining is applied to the inner wall surface of the main body container 1 in order to prevent corrosion and wear. An exhaust port 3a is provided at the center of the container lid 2, and the air inside the main body container 1 is discharged through the exhaust port 3a at the start of operation.

  A cyclone element 6 is provided coaxially with the main body container 1, and is manufactured in a shape in which a tapered portion 6a and a cylindrical portion 6b are connected. The taper portion 6a has a larger diameter toward the upper side, and an opening 6c is formed at the upper end portion thereof. The cyclone element 6 is fixed by welding the cylindrical portion 6 b to the bottom plate 4. The cyclone element 6 can be made of the same metal material as the main body container 1. Further, a ring-shaped protrusion 6 d is integrally attached to the tapered portion 6 a of the cyclone element 6. The protruding portion 6d is attached to the lower portion of the tapered portion 6a. Although details of the protruding portion 6d will be described later, the earth and sand are prevented from rising along the outer surface of the cyclone element 6, and the earth and sand are reliably discharged from the discharge pipe 9.

  The inflow pipe 7 is provided on one end side (upper end side) in the axial direction of the main body container 1 in a tangential direction with respect to the circumferential wall surface of the main body container 1, and water containing earth and sand as separation objects is introduced. The The mounting height of the inflow pipe 7 is set at a position slightly lower than the height of the opening 6 c of the cyclone element 6. An embankment 8 (corresponding to an overhanging means) is provided at the joint between the main body container 1 and the inflow pipe 7, and water flowing from the inflow pipe 7 is prevented from going directly to the tapered portion 6 a of the cyclone element 6, Direct toward the circumferential wall. As a result, a stronger swirling flow is generated. The inner surface 8 a of the bank 8 forms the same cylindrical inner surface as the inner wall surface of the main body container 1.

  On the other end side (lower end side) of the main body container 1 in the axial direction, a discharge pipe 9 is provided for discharging earth and sand contained in water together with water. The discharge pipe 9 is attached to the circumferential wall surface of the main body container 1 in a tangential direction. This tangential direction corresponds to the forward direction of the swirling flow like the inflow pipe 7, and the earth and sand can be discharged smoothly using the swirling force.

  An outflow pipe 10 is attached to the center of the bottom plate 4, and water from which earth and sand have been removed flows out. The outflow pipe 10 is connected to the cylindrical portion 6b of the cyclone element 6 or is integrated with the cylindrical portion 6b. The inflow pipe 7, the outflow pipe 10, and the discharge pipe 9 can be made of the same metal material as the main body container 1.

<Action>
When water containing earth and sand as foreign matter is introduced from the inflow pipe 7, a swirl flow is generated in the main body container 1 because the inflow pipe 7 is attached to the main body container 1 in a tangential direction. In addition, the inflowed water is deflected in the direction of the inner wall surface of the main body container 1 by the action of the bank 8. Moreover, the bank 8 is formed in the shape (for example, which inclines the direction of a front-end | tip part) so that a flow can be deflect | deviated slightly downward by the bank 8. FIG. In order to generate a high-speed swirling flow, the flow rate of the water that flows in is required to be 1.5 m / s or more. Can be achieved.

  The flow velocity in the inflow pipe 7 is higher than the critical Reynolds number, and thus a turbulent state is established, so that the flow velocity distribution in the inflow portion of the inflow pipe 7 is substantially uniform. The momentum of water in the turbulent state is converted into a forced vortex by the action of the tapered portion 6a of the cyclone element 6, and a downward water flow is generated. That is, the water flowing in from the inflow pipe 7 moves downward while turning. The earth and sand contained in the water are concentrated on the inner wall surface of the main body container 1 by the centrifugal force generated by the swirling flow. In addition, since the earth and sand has a higher specific gravity than water, the earth and sand gradually sinks downward while swirling by the swirling flow together with the action of gravity. The earth and sand that have moved downward are discharged together with water from the discharge pipe 9 by the swirling force of water. The discharge pipe 9 does not need to be always opened normally, and may be opened at an appropriate timing to remove separation objects such as earth and sand.

  The swirling flow is a forced vortex in the vicinity of the inflow pipe 7, but approaches a natural vortex as it goes downward. A forced vortex is a swirling flow that becomes faster as it moves away from the center of the vortex, but a natural vortex has a higher center. Therefore, the bottom of the main body container 1 has a shape close to a Rankine vortex or a natural vortex, and a flow that tends to rise along the outer surface of the cyclone element 6 at the bottom due to the pressure generated by the difference in water flow velocity. Occurs.

  At the bottom, since it is a swirling flow that becomes faster toward the center, if the earth and sand move in the center direction, it will be pressed against the outer surface of the cylindrical part 6b of the cyclone element 6 by centrifugal force, and will not rise easily. . By forming the cyclone element 6 by the taper portion 6a and the cylindrical portion 6b, the taper angle of the taper portion 6a is not made too small as compared with the case where the taper portion 6a is constituted by only the taper portion. So that you can). By securing a taper angle of a predetermined value or more, a downward deflection force can be applied to the water introduced from the inflow pipe 7. Further, by providing the cylindrical portion 6b, the volume at the bottom of the main body container 1 can be ensured, which is useful when trying to remove a high concentration separation object such as earth and sand.

  The high specific gravity earth and sand is discharged from the discharge pipe 9 provided at the bottom of the main body container 1, and the water from which the earth and sand have been removed tends to rise along the outer surface of the cyclone element 6. Separation objects with high specific gravity such as earth and sand are discharged from the discharge pipe 9, but separation objects having a small specific gravity difference with water and a small particle size may remain, and along the outer surface together with water. Try to rise. However, a protrusion 6d is provided in the middle, and such a separation object becomes a barrier when rising due to the presence of the protrusion 6d, and it is difficult to reach the opening 6c of the cyclone element 6. Thereby, the isolation | separation target object contained in water can be isolate | separated more effectively.

  The cyclone separator according to the present embodiment was used for the purpose of removing earth and sand by using it in a pre-process of coagulation sedimentation treatment at a civil engineering work site. With this cyclone separator, earth and sand could be removed, and the load of coagulation sedimentation treatment could be reduced. Therefore, a large amount of sewage could be treated with a small sedimentation facility. In addition, since the amount of the coagulating precipitant can be reduced and the amount of waste for precipitation treatment is reduced, the treatment cost of industrial waste can be reduced.

Second Embodiment
FIG. 2 is a diagram illustrating a configuration of a cyclone separator according to the second embodiment. Parts having the same functions as those in the structure shown in FIG. 1 are given the same reference numerals, and different parts from FIG. 1 will be mainly described. This also applies to the other embodiments. This embodiment is used for the purpose of removing foreign substances contained in hydrochloric acid used for acid cleaning in the plating step (reactants such as surface oxides on iron plates, silica in iron, and sludge).

<Configuration>
In this embodiment, the main body container 1, the flanges 1 c and 1 d, the inflow pipe 7, the outflow pipe 10, and the discharge pipe 9 are manufactured using glass fiber reinforced unsaturated polyester resin (Lipoxy H600 manufactured by Showa Polymer Co., Ltd.). . This material is characterized by excellent acid resistance. The cyclone element 6 is manufactured by cutting a rod of ultra high molecular weight polyethylene (Polypenco U-PE100 manufactured by Nippon Polypenco). This material is characterized by excellent chemical resistance, wear resistance, mechanical strength, and fatigue resistance.

  The main body container 1 is composed of an upper main body portion 1A and a lower main body portion 1B for facilitating manufacture, and both are connected by bolts and nuts 11 at flanges 1c and 1d. The upper surface of the main body container 1 is formed into a spherical surface, and an exhaust port 3a is provided at the center thereof. The lower surface of the main body container 1 is also formed into a spherical surface, and an outflow pipe 10 is attached to the center thereof. A bank 8 is formed at the boundary between the inflow pipe 7 and the main body container 1. The direction of the tip of the bank 8 is vertical and does not act to change the flow downward. A ring-shaped recess 1 f is formed at the bottom of the main body container 1.

  The entire outer surface of the cyclone element 6 is a tapered portion, and a gentle taper angle is formed from the upper end to the lower end. A ring-shaped protruding portion 6d is attached to a substantially central portion of the cyclone element 6 in the vertical direction. The cyclone element 6 is fixed to the main body container 1 by fitting the lower end side of the cyclone element 6 into a fitting recess 1e formed at the bottom of the lower main body 1B.

<Action>
The fluid (hydrochloric acid solution) introduced from the inflow pipe 7 is deflected in the direction of the inner wall surface of the main body container 1 by the action of the bank 8, and a swirling flow is generated. The fluid in the turbulent state is converted into a forced vortex by the action of the taper portion on the outer surface of the cyclone element 6, and the separation target having a higher specific gravity than the fluid contained in the fluid is converted into the main body container 1 by the centrifugal force due to the swirling flow It is concentrated on the inner wall of the wall and sinks downward while turning. Compared to the first embodiment, since the angle of the tapered portion of the cyclone element 6 is loose, the speed of the downward flow is relatively slow. The separation object moved downward is discharged from the discharge pipe 9 together with the fluid.

  Since the separation target that is going to rise along the outer surface of the cyclone element 6 becomes a barrier when it rises due to the action of the protrusion 6d, it is difficult to reach the opening 6c. Moreover, since the taper angle is made loose, the force to increase is weaker than that of the first embodiment. Thereby, a separation target can be effectively separated from a fluid.

  The cyclone separator according to the present embodiment was used for removing foreign substances in hydrochloric acid for acid cleaning in the steel plate plating process. Efficient removal of foreign materials could reduce hydrochloric acid consumption due to contamination. As a result, the plating quality could be improved.

<Third Embodiment>
FIG. 3 is a diagram illustrating a configuration of a cyclone separator according to the third embodiment. This embodiment is used for the purpose of removing mist-like water droplets (mist) and oil in the compressor (compressor) air of the compressed air supply facility. Air corresponds to fluid.

<Configuration>
In this embodiment, the main body container 1, the flange 1a, the inflow pipe 7, the discharge pipe 9, the outflow pipe 10, and the cyclone element 6 are made of stainless steel (SUS410). The container lid 2 has a shape in which the upper part protrudes in a spherical shape. Further, the bottom lid 4 has a shape projecting spherically into the main body container 1. The main body container 1 is formed in a cylindrical shape and installed so that its axis is vertical.

  The cyclone element 6 is formed with a taper portion from the upper end to the lower end, and the lower end portion is attached to the bottom lid 4 by welding. A ring-shaped protruding portion 6d is attached to a substantially central portion of the cyclone element 6 in the vertical direction. A tapered tube 12 is attached to the upper part of the main body container 1, and a tapered surface (corresponding to a second tapered surface) having a larger diameter is formed toward the upper end side. An opening 12 a is formed on the lower end side of the taper tube 12, and the size thereof is larger than that of the opening 6 c of the cyclone element 6. Further, the lower end portion of the taper tube 12 and the upper end portion of the cyclone element 6 are located at substantially the same height, and the air from which the separation object is removed from the gap formed between the two openings 6c and 12a is provided. I can get in. The installation position of the inflow pipe 7 is just at the position facing the tapered surface of the tapered pipe 12. The angle of the taper surface of the taper tube 12 is set so that the angle is larger than the taper surface of the cyclone element 6.

<Action>
The air including the separation target introduced from the inflow pipe 7 collides with the tapered surface of the tapered pipe 12 and is deflected toward the inner wall surface of the main body container 1 and also downward in the main body container 1. . In order to generate a high-speed swirling flow, it is necessary that the flow velocity at the inlet portion of the inflow pipe 7 be 10 m / s or more, and this purpose can be achieved by providing the tapered pipe 12. By the action of the taper tube 12, the momentum of the turbulent air can be effectively converted into a forced vortex.

  The air containing the separation object is directed downward, and due to the centrifugal force caused by the swirling flow, water droplets and oil droplets with a higher density than the air collide with the inner wall surface of the main body container 1 to mix water and oil. A film is formed. The water film or oil film reaches the bottom of the main body container 1 with the downward flow of gravity or air. A discharge pipe 9 is provided at the bottom of the main body container 1 in the forward direction of the swirling flow, and a separation object including water and oil is discharged to the outside of the main body container 1 together with air.

  Further, an upward flow along the outer surface of the cyclone element 6 is formed at the bottom of the main body container 1. The air from which the separation target has been removed rises along this outer surface. Then, the water film or oil film once attached to the inner wall surface may return to the water droplets or oil droplets again due to the shearing force caused by the swirling flow, and these water droplets or oil droplets are applied to the outer surface of the cyclone element 6 near the bottom of the main body container 1. It may stick and tries to rise with the air due to the upward flow. However, since the protrusion 6d is provided, further rising is prevented, and it is difficult to reach the opening 6c of the cyclone element 6. Thereby, the isolation | separation target object contained in air can be isolate | separated effectively.

  The cyclone separator according to this embodiment was used in a pneumatic control system and a compressed air supply facility for transportation of a chemical company. And it used for the pre-process of a zeolite-type dehumidifier. The dew point of dehumidified air could be lowered by preliminary dehydration using a cyclone separator. Furthermore, the life of the zeolite could be extended by removing the oil mist.

<Fourth embodiment>
FIG. 4 is a diagram illustrating a configuration of a cyclone separator according to the fourth embodiment. In this embodiment, rice with bran is introduced together with compressed air to separate the rice as the separation object from the rice bran. Used to remove rice bran in the air transportation process of rice after milling. In this embodiment, the rice is discharged together with the compressed air from the discharge pipe, and the soot is discharged together with the compressed air from the outflow pipe. However, what is required as a product (in the post-process) is the rice discharged from the discharge pipe 9.

<Configuration>
The configuration of the main body container 1 is substantially the same as in the first embodiment. The main body container 1, the flange 1a, the inflow pipe 7, the discharge pipe 9, the outflow pipe 10, and the cyclone element 6 are made of stainless steel SUS304. The lower end portion of the cyclone element 6 is fixed to the bottom plate 4 by welding. Further, a rod 6 f is provided on the central axis of the upper part of the cyclone element 6 and is fixed to the container lid 2. By providing this rod 6f, the vibration of the cyclone element 6 can be suppressed.

  The cyclone element 6 is configured by a cylindrical portion 6b and a tapered portion 6a, and the cylindrical portion 6b is positioned upward. The center of the inflow pipe 7 is located at the boundary between the cylindrical portion 6b and the tapered portion 6a. In the inside of the upper end side of the cylindrical portion 6b, six blades 6e functioning as turning restriction means are provided along the circumferential direction.

<Action>
The fluid introduced from the inflow pipe 7 (compressed air including rice to which rice cake is attached) is deflected in the direction of the inner wall surface of the main body container 1 by the action of the cylindrical portion 6b to generate a swirling flow. In order to generate a high-speed swirling flow, it is necessary that the flow velocity when introduced from the inflow pipe 7 is 10 m / s or more. However, the provision of the cylindrical portion 6b achieves this purpose. can do. Further, by providing the cylindrical portion 6b, the momentum of the turbulent fluid is converted into a forced vortex.

  By the high-speed swirling flow, the rice contained in the compressed air rotates while colliding at high speed. By this collision, the rice cake that has been in close contact with the surface of the rice peels off, and can ride on the flow of air. The introduced fluid moves downward while swirling. Due to the centrifugal force generated by the swirling flow, the rice having a density higher than that of the air rapidly descends due to the action of gravity and moves to the bottom of the main body container 1. The high specific gravity rice is concentrated near the inner wall surface of the main body container 1 by centrifugal force, descends while turning, and is discharged from the discharge pipe 9 together with air.

  In addition, an upward flow along the outer surface of the cyclone element 6 is formed at the bottom of the main body container 1, and the rice cake having a small specific gravity difference with air rises with the air from which rice has been removed. When the concentration of rice contained in the compressed air is high, a part of the rice that has not been discharged from the discharge pipe 9 tends to rise on the upward flow, but is provided on the outer surface of the cyclone element 6. By the action of the protruding portion 6d, it becomes a barrier against rising to a higher height.

  The rice cake separated from the rice flows out of the outflow pipe 10 through the inside of the cyclone element 6 together with the compressed air. A blade 6 e is provided on the upper part of the cyclone element 6, and the swirl flow in the inside (upper part) of the cyclone element 6 is suppressed. By suppressing the swirling flow, the vibration of the cyclone element 6 is also suppressed, and the processing capacity can be increased by increasing the internal volume of the cyclone element 6.

  The cyclone separator according to the present embodiment was used in the pneumatic transportation process of rice after milling, so that a trace amount of residual rice cake in the milled rice could be removed, and the quality of the rice could be improved.

<Another embodiment>
Although four embodiments have been described with respect to this embodiment, various embodiments can be employed. Further, the structure employed in each embodiment can be employed for any other embodiment. Further, the type of fluid introduced in each embodiment is not limited to that described in each embodiment. For example, although 1st Embodiment gave and demonstrated the example which processes the water containing earth and sand, the structure of 1st Embodiment is not limited to such a case, It employ | adopts also when introducing another fluid. It is a possible structure. This also applies to the other embodiments.

  The direction in which the fluid from the inflow pipe 7 swirls may be either clockwise or counterclockwise. When the inflow pipe 7, the outflow pipe 10, and the discharge pipe 9 are provided in the tangential direction (on the circumferential wall surface) of the main body container 1, they may be provided at any phase of 360 °.

  The inflow pipe 7 is attached to the upper end side of the main body container 1 and may be provided above the horizontal line drawn at the center position of the main body container 1 in the height direction. The discharge pipe 9 is attached to the lower end side of the main body container 1 and may be provided below the horizontal line. However, in consideration of discharge efficiency, the discharge pipe 9 is preferably disposed near the bottom surface.

  Regarding the material of the main body container 1, the inflow pipe 7, the outflow pipe 10, the taper pipe 12, the discharge pipe 9, and the like, a resin including metal, reinforced plastic, ceramics, and various composite materials can be used in combination. For example, steel (carbon steel, alloy steel including stainless steel), nickel, nickel alloy (Hastelloy, etc.), copper, copper alloy, titanium, titanium alloy, aluminum, aluminum alloy, clad steel (steel and metal other than steel are bonded together) Material) can be used. As the resin, unsaturated polyester resin, epoxy resin, phenol resin as thermosetting resin can be used, PVC, ABS, PS, PPS, POM, acrylic resin (PMMA), fluorine resin (PTFE etc.) as thermoplastic resin ), Polycarbonate resin (PC), nylon resin (PA), PPE resin, polyethylene (PE), polypropylene (PP), and polycyclopentadiene resin. As the fiber reinforced resin (FRP), a composite material of a thermosetting resin or a thermoplastic resin and carbon fiber, glass fiber, aramid fiber, or polyester fiber can be used.

  In addition, as rubber used for rubber lining on the inner wall surface of the main body container 1 or the like, NR rubber, IR rubber, BR rubber, CR rubber, NBR rubber, EPDM rubber, KFM rubber, natural rubber, chloroprene rubber, SBR rubber, Niloryl rubber, polyurethane, silicone rubber, fluorine rubber, etc. can be used.

  The fluid and separation object to be processed in the cyclone separator according to the present invention are not limited to those described in the present embodiment, and can be applied to various fluids and substances.

  In this embodiment, regarding the structure of the cyclone element, the configuration in which the cylindrical portion is provided at the lower portion of the tapered portion (first embodiment) and the configuration in which the cylindrical portion is provided at the upper portion of the tapered portion (fourth embodiment) have been described. However, the cylindrical part may be provided in both the upper part and the lower part of the taper part. About the length of a taper part or a cylindrical part in the up-down direction, it can set suitably.

  As described in the fourth embodiment, whether the substance to be separated is discharged from the outflow pipe or the discharge pipe can be determined based on the separation object, the specific gravity of the fluid, and the like.

The figure which shows the structure of the cyclone separator which concerns on 1st Embodiment. The figure which shows the structure of the cyclone separator which concerns on 2nd Embodiment. The figure which shows the structure of the cyclone separator which concerns on 3rd Embodiment. The figure which shows the structure of the cyclone separator which concerns on 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body container 2 Container lid 6 Cyclone element 6a Tapered part 6b Cylindrical part 6c Opening part 6d Protruding part 6e Blade 7 Inflow pipe 8 Drain 9 Outlet pipe 10 Outflow pipe 12 Taper pipe 12a Opening part

Claims (5)

A cylindrical body container with a central axis installed vertically;
An inflow pipe that is provided tangentially to the circumferential wall surface of the main body container on the upper end side in the axial direction of the main body container, and introduces a fluid containing a separation object;
An outflow pipe through which the fluid from which the separation object is separated flows out;
A discharge pipe that is provided tangentially to the circumferential wall surface of the main body container on the lower end side in the axial direction of the main body container, and discharges the separation object;
Provided coaxially with the main body container in the main body container, provided with an opening on the upper end side and the outflow pipe on the lower end side, respectively, and a cylindrical cyclone element connected to the outflow pipe on the lower end side,
On the outer surface of the cyclone element, a taper surface having a larger diameter is formed toward the upper side in the axial direction, and a ring-shaped projecting portion is provided on the taper surface so that the separation object is along the outer surface. A cyclone separator, characterized in that it can be prevented from rising.   The cyclone separator according to claim 1, wherein the cyclone element is provided with a cylindrical surface above and / or below the tapered surface. A taper tube is provided on the upper side of the cyclone element, and this taper tube has a second taper surface having a larger diameter toward the upper side in the axial direction.
The fluid from which the separation object has been removed moves from the inside of the cyclone element to the outflow pipe through a gap formed between the lower end side of the taper tube and the upper end side of the cyclone element, and the second The cyclone separator according to claim 1, wherein the inflow pipe is disposed so as to face the tapered surface.   The extension part which protrudes from an inflow pipe inner wall surface is provided in the junction part of a main body container and an inflow pipe, and it suppresses that the fluid which flows in flows toward a cyclone element by this extension means. The cyclone separator according to any one of claims.   The cyclone separator according to any one of claims 1 to 4, further comprising a swivel restricting means for restricting swirling of the fluid inside the cyclone element.

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