JPH04254198A - Packings for promoting reaction or heat exchange - Google Patents

Abstract

PURPOSE:To unify the flow rate distribution of fluid which flows through the inside of a reaction tower or the like, and to improve the efficiency of contact reaction, heat exchange or the like by using a sheet type substrate, on which projections are formed by both surface embossing work. CONSTITUTION:Projections 14 are formed by applying embossing work on both surfaces of a sheet type substrate 13 and a plurality of holes 16 are bored on the substrate. Regular packings 10 are obtained by bending the sheet-type substrates 13 into triangular shapes. The packings 10 are superposed on each other or wound spirally and are loaded into a reaction tower or the like. In this case, the posture of the sheet-type substrate 13 is set so that the projections 14 are intersected in a direction perpendicular to the flow directions D1, D2 of fluid, which flows through the space of the reaction tower having no projections 14. The fluid is dispersed efficiently into the direction of the section of flow passage by the projections 14 while a predetermined gap is retained between neighboring substrates 13 whereby the increase of pressure loss can be restrained.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention enables reactions, heat exchange, etc., by equalizing the flow rate distribution of gases, liquids, etc. flowing through the reaction tower or heat exchanger when the reaction tower or heat exchanger is filled with the reaction tower or the like. This invention relates to a filler that promotes.

0002

2. Description of the Related Art In reaction columns for distillation, absorption, dissipation, extraction, etc., for example, gas and liquid are brought into contact with each other in the column to cause a reaction between the two. In order for this reaction to occur smoothly,
It is necessary to use the internal space of the reaction tower efficiently. Therefore, in order to make the flow rate distribution of the fluid passing through the tower uniform, the reaction tower is filled with a packing material that changes the flow direction of the fluid. Furthermore, in heat exchangers and the like, it is also necessary to uniformly distribute the flow rates of heat medium, refrigerant, etc. in order to increase heat exchange efficiency.

[0003] Various types of fillers, including Raschig rings, are used as this type of filler. The packing material is packed in the reaction tower so as to uniformly change the direction of the fluid flowing inside the tower, so that the flow rate distribution of the fluid throughout the tower becomes uniform. However, if the filling material is in the form of small lumps, it may roll within the column due to the kinetic energy of the fluid, and the filling state may change over time. As a result, areas with a large pressure drop and areas with a small pressure drop are created in the tower, which may actually make the flow rate distribution non-uniform.

[0004] In order to improve the shortcomings of small-sized fillers, it is known to use as regular fillers net-like bodies or sheet-like base materials formed into shapes that change the flow direction of fluid. For example, Japanese Patent Application Laid-Open No. 47-38783 introduces a filler made of a metal plate whose surface has been roughened by etching or the like and formed into a wave shape. Also, JP-A-61-23
In Japanese Patent No. 800, a sheet-like base material whose entire surface is satin-finished has a plurality of holes and is bent into a mountain shape to be used as a filler.

[0005]

[Problems to be Solved by the Invention] This type of ordered packing material is required to have a large surface area in contact with the fluid while minimizing the pressure drop imparted to the fluid passing through the reaction tower. Ru. In this respect, the mesh is a filler that has small pressure loss and is effective in changing the direction of fluid flow. However, not only is it an expensive material, but the size of the mesh changes over time due to the accumulation of deposits, which causes changes in the fluid passage characteristics. Moreover, the change in the network does not necessarily occur uniformly inside the reaction tower, and may cause uneven flow in the fluid passing through the tower.

[0006] Furthermore, in the case of a sheet-like base material whose surface has been roughened by etching, the formed surface irregularities are very small and cannot be expected to effectively change the flow direction of a highly viscous fluid. Moreover, waste liquid treatment associated with etching is required, and although the surface roughening treatment itself is easy, the troublesome post-process and the burden on equipment become a problem.

[0007] Even in the case of a sheet-like base material that has been given unevenness by satin finishing, the size of the unevenness is an important factor in determining the performance of the filler. However, with conventional satin finish processing, there is a limit to how much the filler can provide the required performance.

The present invention was devised to solve these problems, and by using a base material that is embossed on both sides, the surface area can be significantly increased. The purpose of the present invention is to provide a filler with excellent fluid dispersion performance so as to have a uniform particle size distribution.

[0009]

[Means for Solving the Problems] In order to achieve the object, the filler of the present invention includes a sheet-like base material whose cross section is bent into a triangular shape, and a filler formed on both sides of the sheet-like base material by embossing. and a plurality of holes formed through the sheet-like base material, and the fluid flowing along the sheet-like base material is directed to the sheet-like base by the projections and the hole parts. It is characterized by a uniform flow distribution over the entire surface of the material.

Although it depends on the internal atmosphere of the reaction tower, heat exchanger, etc., when the sheet-like base material is exposed to a high temperature corrosive atmosphere, for example, stainless steel SUS304,3 is used.
Corrosion-resistant materials such as 16,316L, titanium, zircon, and nickel are used. Embossing is performed by pressing processing rolls against this sheet-like base material from both sides, thereby forming a plurality of protrusions on both sides of the base material. It is preferable that the protrusion has a tip portion that is pointed toward the fluid flow direction when the filler is filled in the reaction tower, heat exchanger, or the like.

[0011]

[Function] The protrusions formed by embossing are
This is much larger than the surface irregularities formed by etching or satin finishing. Moreover, the surface of the protrusion and the surface of the portion where no protrusion is formed are flat surfaces. Therefore, the resistance given by the surface condition of the sheet-like base material to the fluid flowing along the surface of the sheet-like base material is small. Also,
Fluid that comes into contact with the protrusion is distributed to both sides by the protrusion. Moreover, since the protrusions are formed on both sides of the base material, distribution of this fluid is performed on both sides of the sheet-like base material.

[0012] Further, by double-sided embossing, not only the surface area per unit of filler increases, but also a sufficient gap can be maintained between adjacent fillers even when the fillers are stacked one on top of the other. As a result, the fluid passing through the reaction tower, heat exchanger, etc. filled with the packing material of the present invention is distributed throughout the tower with a uniform particle size distribution, and fluid stagnation and local decreases in flow rate are prevented within the tower. It never occurs.

[0013]

[Examples] The present invention will be specifically explained below by way of examples with reference to the drawings.

[0014] As shown in FIG. 1, the filler of this example has
A large number of fillers 10 are stacked on top of each other with gaps between them and bound together by bands 20. The individual fillers 10 are bent into a triangular shape and are alternately formed into peaks 1.
1 and a valley portion 12 are formed. The ridge line of the peak part 11 and the bottom line of the valley part 12 are aligned with the axis of the packing material assembly A so that they intersect obliquely with respect to the fluid passing through the reaction tower etc. when the packing material assembly A is packed in the reaction tower. 1, that is, the vertical direction in FIG. Further, the slopes of the ridge lines of the peaks 11 and the bottom lines of the valleys 12 with respect to the axial direction of the filler aggregate A are opposite to each other between adjacent fillers 10.

The individual fillers 10 are manufactured, for example, according to the steps shown in FIG. That is, a sheet-like base material 13 having corrosion resistance, heat resistance, etc. that can withstand the operating atmosphere is prepared (FIG. 2a). As a sheet-like base material, the plate thickness is 0.1~
Stainless steel SUS304, 316 of about 0.5mm,
A plate made of a corrosion-resistant material such as 316L, titanium, zircon, or nickel is used.

Embossing is performed on both sides of the sheet-like base material 13 to form a large number of protrusions 14. Embossing was performed using processing equipment having the configuration shown in FIG. That is, the sheet-like base material 13 wound into a coil shape is placed on the payoff reel 21.
The tip of the sheet-like base material 13 that has passed through the pinch rolls 22 is connected to the rear end of the sheet-like base material 13 that has been sent out from another payoff reel 23 using a connecting device such as a welding machine 24, and embossing is performed. Feed into roll 27. A looper 26 is arranged on the upstream side of the embossing roll 27, and stores the base material 13 by the length to be sent downstream at the time when the tip of the succeeding base material 13 is connected to the rear end of the preceding base material 13. Note that a preheater 25 is disposed between the welding machine 24 and the looper 26, and the preheater 25 is set at a predetermined processing temperature (for example,
It can also be preheated to 200-400°C.

[0017] The sheet-like base material 13 is coated with an embossing roll 27.
Embossing is performed on both sides by the process, and projections 14 are formed as shown in FIG. 2b. The embossing roll 27 includes a pair of upper and lower forming rolls that are driven in synchronization with each other. By this embossing, for example, the plate thickness is 0.1
mm stainless steel strip SUS304 including plate thickness 0.3
Embossed to mm.

In this example, since the pair of forming rolls were driven so that the unevenness of each forming roll was offset from each other, the protrusions 14 were formed alternately on both the front and back surfaces of the sheet-like base material 13. The projections 14 and the flat portions 15 after embossing both had smooth surfaces. The embossed sheet-like substrate 13 has processing distortion. Therefore, after the sheet-like substrate 13 was passed through a leveler 28, it was wound up on a tension reel 29.

Next, the sheet-like substrate 13 on which the projections 14 were formed was processed such as punching to form a hole 16 having a diameter d=5 mm as shown in FIG. 2c. and,
After cutting the sheet-like base material 13 to a predetermined width, it is bent as shown in FIG. 2d, pitch p = 20 mm, height h = 10.
It was shaped into a triangular waveform of mm. At this time, as shown in FIG.
a and valley fold lines 12a were formed alternately and parallel to the longitudinal direction of the sheet-like base material 13 at an inclination angle of 60 degrees. Then, the filler 10 was obtained by bending the sheet-like base material 13 along the mountain fold lines 11a and the valley fold lines 12a.

[0020] The filler 10 produced in this way is
As shown in FIG. 4, the ridges 11b of the mountain portions 11 were overlapped so that they were inclined alternately upward and downward. Then, by binding the whole with a band 20, the filler aggregate A shown in FIG. 1 was obtained. Note that the filler aggregate A is packed into the reaction tower in the attitude shown in FIG. 1 and comes into contact with the fluid flowing in the vertical direction. Therefore, the projections 14 formed by embossing
The direction in which the protrusions 14 are formed and the sheet-like base material 13 are adjusted such that the tips of the protrusions 14 face the fluid flow direction D1 and/or D2.
decide the attitude of

For example, as shown in FIG.
When the raw material liquid to be cracked flows down inside the reaction tower along the flow direction D2 and the heating medium for cracking rises along the flow direction D2, the sheet-like base material 13 formed with rhombus-shaped protrusions 14 spread in the horizontal direction is used. As a result, the raw material liquid becomes
When passing through the packing material assembly A, it flows down inside the reaction tower while being dispersed horizontally by the protrusions 14. That is, the flow direction of the raw material liquid X is changed to the horizontal direction as shown in FIG. 5a. Further, as shown in FIG. 5b, the liquid passes through the holes 16 and is distributed on both sides of the sheet-like base material 13. As a result, the raw material liquid X spreads throughout the filler assembly A with a uniform flow rate distribution, and comes into contact with the decomposition heating medium rising from below under the same conditions in each part. Therefore, the raw material solution X and the decomposition heat medium can come into contact with each other by effectively utilizing the internal space of the reaction tower, and the decomposition of the raw material liquid X is promoted.

In order to efficiently distribute the raw material liquid, etc., the protrusions 14 should not be made continuous, but should be made as shown in FIG. 6a, for example.
It is preferable that the protrusions 14 are individually independent as shown in FIG. In this case, the tips 14a and 14b of the protrusion 14 are sharpened to improve the dispersion force applied to the fluids X1 and X2 that are flowing down and rising. Alternatively, when the rising fluid X2 has a high self-dispersion property, such as a high-temperature gas, the chevron-shaped protrusion 14 can be formed so as to disperse only the fluid X1 with a low self-dispersion property, as shown in FIG. 6b. These various shapes of protrusions can be easily changed by changing the shape, pitch, etc. of the unevenness engraved on the circumferential surface of the embossing roll 27 described in FIG. 3.

[0023] When the above-described filler aggregate A was packed into a reaction tower and used for fractional distillation of crude oil,
Fractional efficiency is 2 compared to the filler described in Publication No. 23800.
0% increase, and performance close to that of a mesh type filler was obtained. Furthermore, pressure loss was small, and operation under stable conditions for a long period of time was possible.

[0024] When used as a filler for a heat exchanger, the protrusions 14 formed on both sides by embossing reduce the surface area to 2 with respect to the sheet-like base material before embossing.
00%, the heat exchange area with the heating medium or refrigerant was large, and efficient heat exchange was performed. In addition, heat exchange methods include indirect heat exchange, in which either the heating medium or the refrigerant passes through a closed channel so that heat transfer occurs through a sheet-like base material, and heat exchange, in which immiscible fluids are brought into contact with alternating current and heat is transferred. Direct heat exchange in which exchange is performed, regenerative heat exchange in which hot or cold heat is stored in a sheet-like base material by passing a heat medium or refrigerant through it, and then another fluid is passed through it, heat extraction or cooling through a sheet-like base material Various forms such as a method of transferring heat can be adopted.

In the above example, the case where the sheet-like base materials 13 were stacked to form the filler aggregate A was explained. However, the present invention is not limited to this, and for example, the sheet-like base material 13 can be spirally wound to form a filler. It is also possible to divide the filler aggregate A into a large number of parts along the vertical direction in FIG. At this time, a method of dividing the filler aggregate A in the radial direction, a method of dividing it along the lines shown as I and II in FIG. 1, etc. are adopted.

[0026]

[Effects of the Invention] As explained above, in the filler of the present invention, since projections are formed on both sides of the sheet-like base material by embossing, the specific surface area can be extremely increased, and , the fluid flowing through the internal space of a reaction tower, heat exchanger, etc. is made to flow with a uniform particle size distribution throughout the internal space. Therefore, catalytic reactions of fluids subjected to processes such as distillation, decomposition, extraction, heat exchange, etc. are carried out efficiently, and performance comparable to that of expensive mesh-type fillers is exhibited. Furthermore, if this performance is used to design a reaction tower or the like with the same capacity, it is possible to downsize the equipment.

[Brief explanation of the drawing]

FIG. 1 shows a filler aggregate in an example of the present invention.

FIG. 2 shows step by step the manufacturing process of a filler in an example of the present invention.

FIG. 3 shows the equipment configuration for embossing both sides of a sheet-like base material.

FIG. 4 is a diagram for explaining the relationship between the sheet-like base material and the fluid flowing in the reaction tower.

FIG. 5 shows a state in which fluid is dispersed by projections and holes formed in a sheet-like base material.

FIG. 6 shows another example of protrusions formed on a sheet-like base material.

[Explanation of symbols]

A Filler aggregate 10 Filler 11 Mountain part
11a Mountain fold line 11b Mountain ridge line 12 Valley part
12a Valley fold line 13 Sheet-like base material 14 Protrusion
14a, 14b sharp tip 15 flat part 16 hole X,
X1, X2 Fluid D1, D2 Fluid flow direction

Claims (2)

[Claims] 1. A sheet-like base material whose cross section is bent into a triangular shape, a plurality of protrusions formed on both sides of the sheet-like base material by embossing, and a plurality of projections formed through the sheet-like base material. a plurality of holes, and the fluid flowing along the sheet-like base material is distributed by the protrusions and the holes with a uniform flow rate distribution over the entire front and back surfaces of the sheet-like base material. Characteristic filler for promoting reaction or heat exchange. 2. A filler for promoting reaction or heat exchange, wherein the protrusion according to claim 1 has a tip portion that is pointed toward the direction of fluid flow.