JP5491792B2 - Mixing mixer and mixing equipment - Google Patents

Description

  The present invention relates to a mixer and equipment for mixing air and liquid, for example, and more particularly to a mixing mixer and equipment for mixing air and liquid by colliding with each other.

  Conventionally, various mixing means have been proposed in order to mix gas and liquid, or to mix different liquids. As a typical mixing means, there is a stirrer that rotates and mixes an impeller in a container, but an orifice, a baffle plate, etc. are provided in the flow path to generate a turbulent flow or a collision flow. There are static mixers that mix liquids or liquids. Since this static mixer does not have a movable part, it can prevent mixing of foreign substances such as abrasion powder and can perform mixing continuously.

  As one type of this static mixer, in order to mix gas and liquid or liquids different from each other more evenly, a mixed liquid of gas and liquid or a mixed liquid of liquids is increased to a high pressure by a pump or the like. There is a means for applying pressure, generating a high-speed flow through two small through holes, and mixing the two high-speed flows by colliding with each other (see, for example, Patent Document 1).

  That is, the emulsifying device described in Patent Document 1 is obtained by superimposing two liners each having two through-holes opening in the axial direction. Grooves connecting the through holes are formed respectively. The two liners are overlapped so that the grooves are orthogonal to each other.

  When a high-pressure mixed liquid in which liquid and liquid are premixed is introduced into the two through holes of the front liner, the mixed liquid flowing out of the two through holes collides with the overlapping surface of the rear liner, They are bent at right angles along the groove formed in the front liner and then collide with each other at the center of this groove. The collided liquid mixture is bent at a right angle along a groove formed in the rear liner orthogonal to the center of the groove, collides with both ends of the groove, and bends at a right angle at both ends of the groove. And flows into the through-holes opened at both ends of the groove.

  That is, the liquid mixture obtained by premixing the liquid and the liquid is uniformly mixed by colliding with the groove walls and each other when passing through the two overlapped liners to obtain a finely emulsified liquid. ing.

In addition, in the emulsification apparatus described in the cited document 1, before being introduced into the two liners, as shown in the attached FIG. 1, the two fluids are respectively orthogonal to the supply nozzle members 2 and 3. The fluid is ejected into the grooves 5a and 6a, and the fluid in the two grooves is collided with each other to be premixed. The premixed fluid is pressurized to an extremely high pressure of 1400 kg / cm ² (about 1400 MPa).

Japanese Patent No. 2788010

  By the way, in the emulsification apparatus described in the cited document 1, in order to mix more uniformly and finely, it is effective to increase the collision force by increasing the flow velocity in the through holes and grooves formed in the liner. Here, in order to increase the flow velocity in the through holes and grooves, it is necessary to either reduce the diameter of the through holes or the flow path area of the grooves, or increase the flow rate by increasing the fluid inflow pressure. .

  However, in order to increase the flow velocity in the through holes and grooves, the following problems arise when the diameter of the through holes and the flow path area of the grooves are reduced. That is, when two fluids consisting of gas and liquid or different liquids are continuously mixed, at the first stage of mixing, the mutual fluids are mixed in a large lump, and as the mixing proceeds, It gradually breaks down into smaller chunks and mixes more uniformly. Therefore, if the flow area of the through holes and grooves is reduced from the first stage, a large mass of one of the two fluids passes through the small area of the through holes and grooves, and is smaller. There are cases where it is difficult to proceed to a mixed state broken into lumps.

  For this reason, when reducing the diameter of the through holes and the channel area of the groove from the first stage, before that, there is a premixing means for mixing the two fluids into a sufficiently small lump in advance. This is necessary separately, and the size of the entire mixing apparatus increases, and the types of components increase.

  Further, in order to obtain a mixed state decomposed into sufficiently small lumps by the premixing means, it is necessary to increase the flow rate of the mixed fluid in the premixing means itself. However, since the premixing means performs mixing first, if the flow path area in the premixing means is reduced, only one large mass of either one of the two fluids has a small area flow path. There is a case similar to the above-described problem that it is difficult to disassemble into a sufficiently small lump. Therefore, in order to increase the flow rate of the mixed fluid in the premixing means and the mixing means in the subsequent flow, it is necessary to increase the inflow pressure to a high pressure.

  However, in order to increase the flow rate by increasing the inflow pressure to a high pressure, a high-pressure pump is required, and the pipe line, the joint portion, and the like must be configured to withstand high pressure. For this reason, not only the manufacturing cost and the management cost increase, but it is necessary to ensure a high level of safety.

  Therefore, an object of the present invention is to provide a mixing mixer and a mixing facility capable of quickly mixing from a large lump state to a finer lump state sequentially without excessively increasing the fluid pressure with a simple configuration. It is in.

  In order to solve the above problems, a mixing mixer according to the present invention is a laminate in which a plurality of perforated plates having two through holes and a groove plate having slits opened in a cross shape are alternately stacked. The cross-sectional area of the flow path in FIG. 6 is reduced in order from the first stage to the last stage in which the layers are stacked. In other words, this mixing mixer has a laminated structure in which a plurality of layers of through-hole plates and groove plates are alternately laminated. In this through-hole plate, two through-holes penetrating in the axial direction are opened. Are opened in two slits that penetrate in the axial direction and that form a cross shape orthogonal to each other.

  The front-side through-hole plate and the rear-side through-hole plate sandwiching the groove plate are laminated so that the straight lines connecting the two through-holes are orthogonal to each other. The through holes communicate with both ends of one of the two slits of the groove plate, respectively. The other ends of the other two slits of the groove plate communicate with the two through holes of the rear through hole plate, respectively. The first stage and the last stage of the laminated structure are each composed of the through-hole plate, and in the two slits of the groove plate, the cross-sectional area of the cross section when these slits are viewed from the longitudinal direction is From the first stage to the last stage of the laminated structure, the size is decreased sequentially. Either a different fluid or a mixture of different fluids flows into the two through holes of the through hole plate constituting the first stage.

A mixing chamber having a cylindrical inner space is continuously provided on the rear side surface of the through-hole plate constituting the last stage. That is, in this mixing mixer, a mixing chamber having a cylindrical inner space is connected to the rear side surface of the through-hole plate constituting the last stage described above, and this cylindrical inner space is opened at the front end. In addition, a through hole communicating with the outside is formed at the rear end. The axial direction of the two through holes of the through hole plate constituting the last step is such that the two through holes open in a state where the front side surface of the through hole plate is viewed from a direction perpendicular to the front side surface. The directions are perpendicular to the straight line connecting the centers of the openings and are inclined in opposite directions. Then, the mixed liquid is spirally ejected from the two through holes of the through hole plate constituting the last stage into the cylindrical internal space of the mixing chamber. When a mixed fluid of liquid and gas is introduced into the mixing chamber, the pressure in the internal space of the mixing chamber is preferably higher than atmospheric pressure.

  A mixing facility for mixing a gas and a liquid can also be configured by the above-described mixing mixer. That is, the mixing equipment includes a pump that pumps the liquid, a merging device that joins the gas to the liquid pumped from the pump, and the mixing mixer into which the gas-liquid merging fluid flowing out from the merging device flows. A reaction tank into which the gas-liquid mixed solution flowing out from the mixing mixer flows and a reflux path for returning the gas-liquid mixed solution flowing into the reaction tank to the pump are provided. The gas-liquid combined fluid flowing out from the combining device flows into the two through holes of the through hole plate constituting the first stage of the mixing mixer.

  The flow path area of the slit that forms the cross plate of the groove plate is reduced sequentially from the first stage to the last stage, thereby simplifying the configuration and reducing the liquid mixture consisting of a finer and more uniform lump. Can be obtained quickly and with pressure. That is, in the first stage, since it is a mixture of a large lump state, it is possible to prevent a large lump of only one fluid from occupying the slit and passing by increasing the cross-sectional area of the slit. . In addition, each time it passes through the steps, it is broken down into smaller chunks, so that the cross-sectional area of the slit can be reduced. For this reason, since the flow velocity passing through the slit can be increased correspondingly, the collision force increases sequentially, and it is possible to proceed rapidly to a state of a finer mixed liquid.

  For example, when the mixing ratio is greatly different, only one fluid having a large mixing ratio tends to pass through the slit of the cross in the vicinity of the first stage, and the mixing at that stage cannot be sufficiently achieved. Therefore, if the cross-sectional area of the slit is sufficiently large near the first stage, it is possible to avoid passing only one fluid while occupying the cross-shaped slit. it can. Moreover, since the cross-sectional area of a slit can be made small, so that it progresses to a back | latter stage, it becomes possible to increase gradually the flow velocity which passes a slit. For this reason, it is possible to realize a mixed liquid composed of a finer and more uniform lump without excessively increasing the inflow pressure to the first stage.

  If the sectional area of the slit is made smaller than the area of the through hole in each stage, the maximum flow velocity in each stage can be determined by the sectional area of the slit. In this case, since the slit is an elongated opening hole penetrating the groove plate, the slit can be formed with high accuracy and easily so as to have a target cross-sectional area.

  In addition, by configuring the perforated plate and the groove plate so as to be laminated in a plurality of stages alternately, the permeation plate and the groove plate can be made to pass according to the characteristics such as the viscosity of the fluid to be mixed, the mixing ratio, or the size of the target fine lump. It is possible to easily set the optimum number of layers of the hole plate and the groove plate. In addition, since it is possible to fix a multi-layered laminate with bolts or the like, it is easy to assemble and disassemble. For this reason, inspection, repair, and replacement of the through-hole plate and the groove plate become extremely easy.

  By connecting a mixing chamber to the rear end of the final stage through-hole plate and ejecting the mixed liquid from the through-hole plate into the mixing chamber in a spiral shape, a more uniform and fine lump mixture can be obtained. it can. Furthermore, when gas and liquid are mixed, by increasing the pressure in the internal space of the mixing chamber, the residence time in a state where the allowable amount of gas dissolved in the liquid is high is lengthened. Can be dissolved in a liquid. Further, by ejecting the gas-liquid mixed fluid in a spiral shape into the mixing chamber, the gas can be more uniformly dissolved in the liquid in the internal space of the mixing chamber.

It is a cross-sectional view of a mixing mixer. It is a front view of each through-hole plate and each groove | plate which are laminated | stacked alternately. It is a perspective view of the through-hole plate and groove plate which are laminated | stacked alternately. It is an expanded sectional view of the through-hole plate and groove plate which were laminated | stacked alternately. It is the expansion front view and side view of a through-hole plate of the last stage. It is a block diagram of mixing equipment.

  The configuration of the mixing mixer according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the mixing mixer according to the present invention has a laminated structure 3 in which a plurality of through-hole plates 1 and groove plates 2 are alternately laminated. The laminated structure is sequentially from the left side in FIG. , First through hole plate 11, first groove plate 21, second through hole plate 12, second groove plate 22, third through hole plate 13, third groove plate 23, and fourth A through-hole plate 14 is provided. As shown in FIG. 1, the mixing chamber 4 having a cylindrical inner space 41 is connected to the rear side surface of the fourth through-hole plate 14 which is the final stage of the laminated structure 3.

  The through hole plate 1, the groove plate 2, and the mixing chamber 4 are positioned by two positioning pins 5 and 5, and the front and rear are sandwiched between the front flange 6 and the rear flange 7. The front flange 6 and the rear flange 7 fix the through-hole plate 1, the groove plate 2, and the mixing chamber 4 in the axial direction by four through bolts 8.

  In FIG. 2, the first through-hole plate 11 to the fourth through-hole plate 14 and the first through-hole plate 21 through the third through-hole plate 23, in which the above-described laminated structure 3 is disassembled and arranged in order from the front side, The mixing chamber 4 connected to the rear end of the laminated structure is shown. The first through-hole plate 11 to the fourth through-hole plate 14 have two through-holes 11 a to 14 a penetrating in the axial direction, respectively. The first through-hole plate 21 through the third through-hole plate 23 The two slits 21a to 23a and 21b to 23b are formed so as to pass through in the axial direction and to form a cross shape orthogonal to each other. In addition, two positioning pins 5 and 5 are fitted to the front end of the first through hole plate 11 to the fourth through hole plate 14, the first groove plate 21 to the third groove plate 23, and the mixing chamber 4. Positioning holes 11c to 14c, 21c to 23c, and 42 are provided.

  Now, as shown in FIG. 3, the first through-hole plate 11 and the second through-hole plate 12 sandwiching the first groove plate 21 from the front and the back are the two through holes provided in the first through-hole plate. A straight line connecting the holes 11a and 11a and a straight line connecting the two through holes 12a and 12a provided in the second through hole plate are stacked so as to be orthogonal to each other.

  FIG. 4 shows a cross section when the above-described first through hole plate 11, first groove plate 21, and second through hole plate 12 are laminated. That is, the two through holes 11a and 11a of the first through hole plate 11 communicate with both ends of one of the two slits of the first groove plate 21, respectively, and the other of the first groove plate 21 Both ends of the slit 21a communicate with the two through holes 12a and 12a of the second through hole plate 12, respectively. The second through-hole plate 12, the second groove plate 22, and the third through-hole plate 13 are also laminated in the same arrangement. Further, the third through-hole plate 13, the third groove plate 23, and the fourth through-hole plate 14 are laminated in the same arrangement.

The upper view of FIG. 5 shows the shape of the fourth through-hole plate 14 constituting the last stage of the laminated structure 3 when the front side surface of the through-hole plate is viewed from the direction orthogonal to the front side surface. The fourth hole plate 14 to the second through hole 14a provided in the axial direction of the 14a, the direction perpendicular to the line connecting the opening centers through hole of the two is open, i.e. in an arrow line in the upper portion of FIG. 5 As shown, they are inclined in the up-down direction and in opposite directions. 5 shows a cross section AA when cut along a plane including the center line of the through hole 14a located on the left side in the upper view of FIG. As is apparent from the lower diagram of FIG. 5, the axial directions of the two through holes 14a and 14a provided in the fourth through hole plate 14 are inclined in opposite directions.

  As shown in FIG. 1, the mixing chamber 4 connected to the rear side surface of the fourth through-hole plate 14 has a cylindrical inner space 41, and this cylindrical inner space faces the rear end. For example, the cross section has a semi-elliptical shape so that the inner diameter gradually decreases. A through hole 42 communicating with the outside is formed at the rear end of the internal space 41. The front end of the cylindrical internal space 41 is open, and the diameter of the opening is such that the opening does not block the two through holes 14 a and 14 a provided in the fourth through hole plate 14.

  An inflow pipe 62 into which premixed fluid flows is connected to the central portion of the front flange 6 that is in contact with the front end of the laminated structure 3, and the fluid that has flowed in from the inflow pipe flows on the rear surface of the front flange. It flows into the two through holes 11 a and 11 a of the first through hole plate 11 from both ends of the groove via the formed groove 61. In addition, an outlet 71 is opened at the center of the rear flange 7 that is in contact with the rear end of the laminated structure 3, and a fluid in a mixed state of fine lumps is supplied to the mixing chamber 4 at the outlet. The outflow pipe 72 which flows out through the through-hole 42 opened to the rear side end is connected.

  The two slits 21a, 21b to 23a, 23b, which are formed in the first groove plate 21 to the third groove plate 23 and cross each other in a crossed manner, are cross sections obtained by viewing these slits from the longitudinal direction, for example, in FIG. The cross-sectional area of the cross section of the rectangular slit 21a is formed to be smaller in order of the first groove plate, the second groove plate, and the third groove plate. For this reason, the flow path areas of the two slits, which are sandwiched between the front and rear holes and serve as the flow path for the mixed solution, are the first groove plate 21, the second groove plate 22, and the third groove plate 23, respectively. In order, the flow rate decreases and the flow rate increases in sequence.

  The above-described components are all made of stainless steel. However, when the mixed solution is oil or the like and is not easily rusted, a steel material, a copper alloy, or the like may be used. Further, the through holes 11a and the like of the through hole plate 11 and the like can be easily processed by a drill. Further, the slits 21a, 21b and the like of the groove plate 21 can be easily machined into an accurate dimensional shape by drilling, milling, laser machining, electric discharge machining, or the like.

  Next, the operation of the above-described mixing mixer will be described with reference to FIGS. That is, in FIG. 1, for example, a premixed liquid in which gaseous air is mixed with water, which is liquid, by an ejector or the like is pressurized by a pump or the like, and passes through an inflow pipe 62 and a groove 61 formed in the front flange 6. And it is made to flow in into two penetration holes 11a and 11a provided in the 1st penetration hole plate 11, respectively.

  As shown in FIGS. 3 and 4, the premixed liquid that has flowed into the two through holes 11 a and 11 a of the first through hole plate 11 is inserted into the slits 21 b formed in the first groove plate 21. It flows in from both ends, collides with the front side surface of the second through-hole plate 12, bends at a right angle, and moves toward the center of the slit. The cross-sectional area of the flow paths of the slits 21 a and 21 b formed in the first groove plate 21 is smaller than the area of the two through holes 11 a of the first through hole plate 11. Therefore, the flow rate of the mixed liquid increases when passing through the slit 21b.

  The premixed liquid that has flowed into the slit 21b travels from the opposite ends toward the center, collides with each other at the center of the slit, and changes its direction at a right angle into the slit 21a that intersects the cross at the center. Inflow. Then, the mixed liquid that has flowed into the slit 21a flows from both ends into the two through holes 12a and 12a of the second through hole plate 12 while changing the direction at right angles. In this way, when the mixed solution passes through the slits 21a and 21b of the first groove plate 21, the flow rate is increased, the direction is changed to a right angle, and the mixed air mass is changed by colliding with each other. It breaks down and the finer air mass becomes more uniformly mixed.

  The mixed liquid that has flowed into the two through holes 12a and 12a of the second through hole plate 12 sequentially passes through the slits 22a and 22b of the second groove plate 22 and the through holes of the third through hole plate 13 through the same process. 13a, 13a, the slits 23b, 23a of the third groove plate 23, and the through holes 14a, 14a of the fourth through hole plate 14. As described above, the slits 22 a and 22 b of the second groove plate 22 and the slits 23 a and 23 b of the third groove plate 23 are sequentially cross-sectional areas of the flow paths from the slits 21 a and 21 b of the first groove plate 21. Therefore, the flow rate of the liquid mixture passing through these slits sequentially increases, and the air mass becomes finer and more uniformly mixed.

  As described with reference to FIG. 5, the axial directions of the through holes 14 a and 14 a of the fourth through hole plate 14 are inclined in directions opposite to each other. It flows out into the internal space 41 in a spiral shape. Therefore, the liquid mixture is stirred in a spiral shape in the cylindrical internal space 41, and a fine air mass is mixed more uniformly. In this internal space, the dissolution of air into the liquid is performed. Promoted. The mixed liquid that has flowed into the cylindrical inner space 41 passes through the through hole 42 opened at the rear end of the inner space, the outlet 71 provided in the rear flange 7, and the outlet pipe 72. leak.

  By the way, the pressure of the gas-liquid mixed fluid flowing out from the outflow pipe 72 is normally released to atmospheric pressure. However, if the diameter of the through hole 42 is formed to be small, the pressure in the internal space 41 can be maintained higher than the pressure in the outflow pipe 72 communicating with the outside of the through hole, that is, atmospheric pressure. Here, if the pressure in the internal space 41 is increased, the allowable amount of air dissolved in the liquid increases from that at atmospheric pressure.

  The cross-sectional areas of the two through holes 11a and 11a of the first through hole plate 11 and the two slits 21a and 21b of the first groove plate 21 are characteristics of the fluid to be mixed, a mixing ratio, or a target. Set appropriate values according to the final characteristics of the liquid mixture.

  FIG. 6 shows an example of a mixing facility provided with a mixing mixer that mixes and dissolves the gas described above into a liquid. That is, this mixing facility is a facility that mixes and dissolves air in sewage containing ammonium thiosulfate and ammonium sulfite, which are harmful substances, and chemically changes the ammonium thiosulfate and ammonium sulfite to non-toxic ammonium sulfate, The time until detoxification is shortened by dissolving a larger amount of air in the sewage.

  That is, the mixing equipment includes an electric pump A that pumps water or a mixed liquid containing harmful substances, an ejector B that joins the air to the water or mixed liquid pumped from the electric pump, and an air that flows out of the ejector. A mixing mixer C into which the liquid combined fluid flows, a reaction tank D into which the gas-liquid mixed liquid flowing out from the mixing mixer flows, and a reflux path E for returning the gas-liquid mixed liquid flowing into the reaction tank to the electric pump A; It has. In addition, in the path between the electric pump A and the ejector B, a flow rate adjusting valve F for adjusting the flow rate of water or a mixed solution, a flow meter G for measuring the flow rate of water or the mixed solution, and an inflow pressure of the ejector. A pressure gauge H for measuring is provided. An air compressor I, a pressure reducing valve J, a flow meter K for measuring the air flow rate, and a flow rate adjusting valve L for adjusting the air flow rate are provided in order on the path for pressurizing the air into the ejector B.

  In this mixing facility, water or gas-liquid mixed liquid containing harmful substances stored in the reaction tank D is pumped to the ejector B by the electric pump A. Also, the outside air is pumped to the ejector B by the air compressor I, and the air joins the water or the gas-liquid mixed solution in this ejector. The gas-liquid combined liquid flowing out from the ejector B flows into the mixing mixer C described above, and the air is decomposed into fine lumps, and the internal space of the mixing chamber higher than the atmospheric pressure is decelerated and takes some time. Pass through. Therefore, the sewage pumped up from the reaction vessel D is almost detoxified while passing over a certain amount of time in the internal space of the mixing chamber under a state where a larger amount of air is dissolved, and the reaction vessel D Reflux in. For this reason, the sewage in the reaction tank D can be detoxified in a short time.

  Because it can be quickly mixed from a large lump state to a finer lump state in a simple configuration without increasing the fluid pressure, it can be widely used in the industry related to the mixing of gas and liquid or different liquids. Can do.

DESCRIPTION OF SYMBOLS 1 Through-hole plate 11-14 1st through-hole plate-4th through-hole plate 11a-14a Through-hole 11c-14c Positioning hole 2 Groove plate 21-23 1st groove plate-3rd groove plate 21a-23a Slit 21b-23b Slit 21c-23c Positioning hole 3 Laminated structure 4 Mixing chamber 41 Cylindrical internal space 42 Through hole 5 Positioning pin 6 Front flange 7 Rear flange A Electric pump (pump)
B Eject C Mixing mixer D Reactor E Reflux path

Claims (3)

It has a laminated structure in which multiple layers of through-hole plates and groove plates are laminated,
The through-hole plate has two through-holes penetrating in the axial direction,
In the groove plate, there are two slits that penetrate in the axial direction and that are orthogonal to each other to form a cross,
The front-side through-hole plate and the rear-side through-hole plate sandwiching the groove plate are laminated so that straight lines connecting the two through-holes are orthogonal to each other,
The two through holes of the front through plate communicate with one end of each of the two slits of the groove plate,
The other ends of the two slits of the groove plate communicate with the two through holes of the rear through hole plate, respectively.
The first stage and the last stage of the laminated structure are each composed of the through-hole plate,
In the two slits of the groove plate, the cross-sectional area of the cross section when these slits are viewed from the longitudinal direction is sequentially reduced from the first stage to the last stage of the laminated structure,
Either one of different fluids or a mixture of different fluids flows into the two through holes of the through hole plate constituting the first stage ,
A mixing chamber having a cylindrical inner space is continuously provided on the rear side surface of the through-hole plate constituting the last stage,
The cylindrical internal space is opened at the front end, and a through hole communicating with the outside is formed at the rear end.
The axial direction of the two through holes of the through hole plate constituting the last step is such that the two through holes open in a state where the front side surface of the through hole plate is viewed from a direction perpendicular to the front side surface. It is a direction perpendicular to the straight line connecting the center of the opening, and is inclined toward the opposite direction to each other,
A mixing mixer , wherein the mixed liquid is ejected in a spiral shape from the two through holes of the through hole plate constituting the last stage into the cylindrical internal space of the mixing chamber . The mixed fluid of liquid and gas flows into the mixing chamber according to claim 1 ,
The pressure of the inner space of the mixing chamber, a mixer, wherein the Ru higher Citea than atmospheric pressure. A mixing facility for mixing gas and liquid by the mixing mixer according to claim 2 ,
A pump for pumping the liquid, a merging device for merging the gas to the liquid pumped from the pump, the mixing mixer for flowing the gas-liquid merging fluid flowing out from the merging device, and flowing out from the mixing mixer A reaction tank into which the gas-liquid mixture flows, and a reflux path for refluxing the gas-liquid mixture that has flowed into the reaction tank to the pump,
The gas-liquid merged fluid flowing from the confluent apparatus, the second hole of the hole plate that constitutes the first stage of the mixing mixer, mixing equipment, wherein you flows respectively.

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