JPS6095B2 - Method and separator for separating and removing droplets in airflow - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method and a separator for separating and removing droplets from airflow in a pipe containing droplets by using centrifugation, coagulation, and collision. Regarding.

This type of gas-liquid separation method and separator are applied in many industrial fields including the chemical industry.

When a gas containing microscopic droplets such as mist (hereinafter referred to as droplets) and drain flows through a pipe, the droplets aggregate with each other and become drain, flowing into the lower parts of the pipe. They gather together and flow down with the air currents. At this time, if the flow velocity of the gas is high (approximately 6 m/sec or more), the drains that collect in the lower part of the flow path and flow down are again turned into droplets due to the flow velocity of the gas in the pipe and flow down with the air flow.
These droplets that are present along with the airflow in the pipe are difficult to effectively undergo sedimentation due to gravity within the gas, making it difficult for gas-liquid separation to occur, making it difficult to effectively remove and discharge the droplets. be. There are various conventional means for separating liquid in an air stream, but the gas-liquid separation action in them is based on the following basic principles, which can be used singly or in combination. Many are applied.
Namely '1' Gas-liquid separation by gravity sedimentation.

{2} Collision into droplets and gas-liquid separation.

[3- Gas-liquid separation by droplet formation accompanied by centrifugation and coagulation. [4- Gas-liquid separation using a collision plate (louver) or other device that rapidly changes the direction of airflow.

etc.

Some of the conventional air separators based on the above-mentioned principle of operation have features such as a simple structure and low pressure loss within the device. There is a tendency to increase the size of the separation equipment, the separation ability is low for small droplets such as droplets, and if the separation equipment is miniaturized to avoid increasing the size of the separation equipment as described above, gas Some problems remain, such as deterioration of separation ability when the flow rate increases.

Therefore, when selecting existing gas-liquid separation equipment, certain functional problems must be ignored for the reasons mentioned above. Furthermore, if we consider a concrete example, for example, we can collide gas containing droplets to promote the agglomeration of droplets in the gas, and then rapidly change the direction of the airflow to separate the gas and liquid. As shown in Figures 1 and 2, there are collision type separators that remove the
Gas inflow pipes a and gas outflow pipes c are provided at symmetrical positions on the upper part of the separation tank b, and a baffle plate d having a gutter part e at the lower end is installed so as to block the gap between the inflow pipe a and the outflow pipe c. A partition plate f is suspended from the upper part of the drain pipe g, and a partition plate f is provided with a notch h communicating with the drain pipe g at a required distance from the gutter part e. The gas and liquid are separated by the collision force when the gas containing the droplets collides with the baffle plate d and the inertial force when the direction is changed by the partition plate f, and the gas is sent out from the gas outflow pipe c.
The liquid droplets adhering to the inner wall of the separation tank b and the baffle plate d are discharged from the notch h to the outside of the separation tank b via the drain pipe g, but this is because the structure is simple. Although it has the advantage of low pressure loss, it requires a relatively large space for gas-liquid separation compared to other methods, and at an actual inflow rate near the upper limit of the design capacity, the liquid in separation tank b Some of the droplets are turned into droplets by the airflow and flow out from the gas outflow tube c along with the airflow, and droplets such as mist in the gas are
This method has problems in terms of gas-liquid separation and removal, such as the flocculating liquid flowing together with the air flow without being sufficiently bottled.

In addition, cyclone separators that use centrifugal separation are in various shapes. For example, in the shapes shown in Figures 3 and 4, there is a A hollow conical part C is integrally formed, a separated liquid discharge port L is provided at the lower end thereof, a bottom plate is formed at the upper end of the body part B, and an exhaust pipe D is provided at the center of the body part B, and an exhaust pipe D connects the lower part of the part to the body part B. It is fixedly held so as to protrude into B, and
A gas inflow pipe A is arranged along the outer peripheral wall of the upper side of the body part B so as to surround the outer peripheral wall of the body part B. When gas containing droplets is blown into the body part B from the gas introduction pipe A, the resulting airflow turns into a downward circular flow shown by E within the body part B and descends while swirling. Then, it reaches near the lower end of the hollow conical part C and reverses, becomes an upward swirling flow shown by F, swirls upward, and is exhausted through the exhaust pipe D. On the other hand, droplets are separated by the swirling reversal of the airflow, etc. is discharged from the separated liquid outlet L at the bottom of the hollow conical part C.

To evaluate the separation ability of this cyclone separator,
The ability of a cyclone separator to capture droplets depends, in part, on the droplet size in the gas, as expressed in the concept of "% trapped average particle size." In this case, droplets that are so small that they cannot be sufficiently centrifuged within the body of the cyclone separator are discharged through the cyclone separator together with the gas without being separated and removed. However, the amount of droplets flowing out without being separated in the cyclone separator also depends on the inflow speed of the gas containing the droplets flowing into the cyclone separator, and the inflow speed of the gas exceeds the design speed. If the droplet exceeds the cyclone separator, the proportion increases as the droplets flow out of the cyclone separator through the exhaust stack D, but as shown in Figure 4, these droplets flow toward the entrance of the exhaust stack D near the entrance of the exhaust stack D. This is because the upward swirling flow F becomes larger, and at this time, droplets in the form of minute particles that have not been sufficiently subjected to centrifugal separation within the body portion B ride on the upward swirling flow F as a short-circuit flow S. Furthermore, even if the gas inflow speed into the cyclone separator becomes lower than the design speed, the amount of droplets flowing into the exhaust stack D will increase, but this is mainly due to the deterioration of the separation effect due to centrifugal force. From these facts, it can be seen that the cyclone type gas-liquid separator is not suitable for applications where there are large changes in air velocity within the pipe. A wide range of investigations and research have been conducted on the operating theory that affects the function of cyclone separators, and as a result, the elucidation of the theory and its application methods have been clarified.

Views regarding the function of the separator are also derived from the results of these working theory studies. In summary, even if the gas inflow velocity into the cyclone separator is too low relative to the design value,
In addition, if it is too high, the capture rate will deteriorate, and small particles such as droplets are generally difficult to capture. It is necessary to change the size of . To explain these functional characteristics from a structural point of view, a gas inflow pipe A is connected to a body part B that generates centrifugal separation, and a gas inflow pipe A is connected to a body part B that generates centrifugal separation.
Although the structure of a typical cyclone separator is extremely simple, in which an exhaust pipe D is arranged concentrically inside the body part B, and a hollow conical part C is connected to the lower part of the body part B,
On the one hand, the body part B, the inlet T of the gas inflow pipe A, and the inlet of the exhaust pipe D are directly adjacent to each other, and the downward spiral toward the outside inside the body part B and the hollow conical part C There is no structure intervening between the flow E and the central upward swirling flow F, and the structures are directly adjacent to each other, which causes the deterioration of the gas-liquid separation function as described above. It is also a contributing factor.

As mentioned above, conventional examples of impingement type separators and cyclone separators have structures that are relatively easy to install in pipes, but they also have essential functions for separating and removing droplets based on their respective structures. It has certain weaknesses.

This invention was made in view of the above-mentioned drawbacks in the conventional embodiments, and the purpose of the invention is to:
A droplet-like liquid bottle in an air flow that is less susceptible to the effects of gas inflow velocity and particle size than the cyclone method or collision method, has better separation efficiency, and allows for a smaller separator for the same processing capacity. An object of the present invention is to provide a method and a separator for separating and removing.

The gist of the method of the present invention is to send gas containing droplets into the spiral flow path from the inlet of the spiral flow path formed at the upper part of the spiral shaped body installed in the separation tank main body. When the gas moves through this spiral flow path, the centrifugal action collects droplets on the curved inner surface of the wall of the spiral shape, separating the gas and liquid. The cross-sectional area of the flow channel is gradually reduced as it advances, promoting the aggregation of droplets in the airflow, and the radius of curvature is reduced by 4 mm to make it more susceptible to separation by centrifugal force. The separated liquid centrifuged from the spiral flow path is collected after flowing down along the inner surface of the outer wall of the spiral flow path, and is guided to the droplet collision plate and collided with the droplet collision receiving plate. The droplets are caused to collide with a shaped wall, thereby separating the droplets remaining in the airflow, passing through the spiral wall and colliding with a droplet collision receiving plate. The airflow is discharged by flowing down from the lower part of the separation tank main body, and the direction of the air flow is changed to flow out into the lower part of a wide cavity inside the separation tank main body, and the hollow space is raised to perform gas-liquid separation and discharge into the separation tank main body. Gas and liquid are separated by exhausting the gas from the gas outflow pipe located in the upper part, and the gist of the separator suitable for carrying out the method of this invention is to convert a spiral curve on a plane into this plane. Two spiral bodies that are formed by moving in a right angle direction are installed side by side inside the separation tank body, and the spiral directions of these spiral bodies are formed in opposite directions. The wall surfaces of the inlet portions are roughly aligned back to back to each other so that the spiral portions face each other on both sides, and the inlet portion is connected to a gas inflow pipe facing above the peripheral wall of the separation tank main body. A droplet collision receiving plate for guiding the separated liquid is provided at the bottom of the spiral shaped body in the main body, and a partition plate for separating the separated liquid and gas is provided below the separation tank main body, and the separated liquid is placed on the partition plate. A notch is formed to allow the separated liquid to flow down, and a discharge pipe for discharging this separated liquid is installed at the bottom end of the separation tank body.Furthermore, a gas outflow pipe is attached to the opposite side of the gas inflow pipe in the separation tank body. A plurality of buffful boards are provided in a cavity inside the separation tank main body between the gas outflow pipe and the spiral shaped body.

Hereinafter, the configuration of an embodiment according to the present invention will be explained in detail with reference to the drawings. 5 and 6, reference numeral 1 denotes a cylindrical separation tank body. The separation tank body 1 is installed with the axis of its cylindrical portion perpendicular, and an upper plate 2 is attached to the upper part, and an upper part plate 2 is attached to the lower part. A lower plate 3 is attached to the lower plate 3 having a slope that allows the liquid to flow down by gravity, and a discharge pipe 4 for discharging the separated liquid is installed at the lower end of the lower plate 3. Above the peripheral wall of No. 1 is a gas inflow pipe 7 to be described later.
, 7a are formed. 6 and 6a are spiral shaped bodies, each of which is formed by moving a spiral curve on a plane in a direction perpendicular to this plane, and the spiral directions of each are opposite to each other such as left-handed and right-handed. Each spiral shaped body 6, 6a is formed in a direction.
Regarding the walls of the inlet parts 20, 20a formed in the upper part of the inlet parts 20, 20a, the inlet parts 20, 2
The walls of 0a are combined back to back and positioned one-sidedly against the inner wall of the separation tank body 1 on the side of the gas inflow pipes 7, 7a to separate the vortex axis passing through the vortex centers of the spiral bodies 6, 6a. The gas inlet portions 20 and 20a are provided parallel to the axis of the tank body 1 and fixed by a mounting member, etc., and each inlet portion 20, 20a passes through each of the openings 5, 5a and faces into the separation tank body 1. The inflow pipes 7 and 7a are provided at one end so that gas can be introduced from the gas inflow pipes 7 and 7a, respectively.

Reference numerals 8 and 8a denote droplet collision receiving plates which are inclinedly disposed below the vortex centers of the spiral bodies 6 and 6a, and the tip sides of each are arranged to connect the inside of the separation tank body 1 to a separated liquid chamber 11 and a cavity described below. A notch 1 formed in the partition plate 9 horizontally provided below so as to separate the separated liquid and the gas into two parts 14 and 14.
0 and 10a, and is configured so that separated liquid can flow out from the liquid bottle collision receiving plates 8 and 8a into the separated liquid chamber 11 below the partition plate 9 by the slope thereof, and the partition plate 9
A vent hole 12 that also serves as a drain hole is formed on the opposite side of the notch 10, 10a with respect to the center of the separation tank body 1, and a vent hole 12 that also serves as a drain hole is formed on the opposite side of the gas inflow pipes 7, 7a with respect to the axis of the separation tank body 1. The gas outflow pipe 13 is attached above the outer surface of the peripheral wall of the separation tank body 1, and the wall surface at the mounting part is opened, and the gas outflow pipe 13 and the parting plate 9, excluding the spiral shaped bodies 6, 6a, etc. in the separation tank body 1, are The cavity 14 formed from a wide space is communicated with the cavity 14.
Vertical baffle boards 15, 15a, a first baffle board 16, and a second baffle board 17 are installed between the vicinity of the droplet collision receiving plates 8, 8a and the inflow opening end of the gas outflow pipe 13 to prevent short circuits in the airflow. are arranged respectively. Next, the spiral shaped bodies 6, 6a, droplet collision receiving plates 8, 8a, each baffle board 15, etc. will be described in further detail. 2
Reference numerals 1 and 21a denote spiral walls forming spiral bodies 6 and 6a, respectively, and a lower bottom plate 23 made of a plate-like member is connected between the opposing spiral wall surfaces of the spiral walls 21 and 21a, respectively.
, 23a, and are connected to each other through spiral flow paths 22 through which air flows.
, 22a, and the lower bottom plates 23, 23a extend the spiral space in the forward direction in a spiral shape with a required downward slope, and the opposite spirals in the spiral walls 21, 21a After the required number of turns, the lower bottom plates 23, 23a connect the shaped wall surfaces to each other and move toward the center of the vortex.
The extension is stopped to form terminal portions 24 and 24a, respectively.

Further, the spiral walls 21, 21a, which extend toward the center of the vortex from the positions of the terminal ends 24, 24a, are further extended to the position where they make one turn, completing the formation of the spiral shape, and from the terminal ends 24, 24a. Extended spiral wall 21 for one turn
, 21a maintain this spiral shape and hang down parallel to the disaster axis D', and their lower ends face the upper portions of the droplet collision receiving plates 8 and 8a, respectively. Further, in the upper portion of each of the lower bottom plates 23, 23a, upper bottom plates 25, 25a made of similar plate-like members connect the opposing spiral wall surfaces of each of the spiral walls 21, 21a to form a spiral flow path. 22, 22a, and each lower bottom plate 2
3, 23a in a similar manner to reach the upper part of the terminal parts 24, 24a, and further cross the hollow part near the vortex center, and the spiral walls 21, 21
The upper end near the center of the vortex is closed by expanding until it reaches each wall surface that has been extended in one turn and connecting to the wall surface. The heights from the lower base plates 23, 23a to the corresponding upper base plates 25, 25a are defined by the respective spiral walls 21, 21a, the lower base plates 23, 23a and the upper base plates 25, 25a. The spiral passages 22, 22a are sized to define a required cross-sectional area for the flow rate of the incoming gas, and then the spiral walls 2! , 21a, the lower spiral walls of the lower bottom plates 23, 23a and the upper spiral walls of the upper bottom plates 25, 25a of the spiral walls 21, 21a are cut out along the outer edges of the connection parts with the spiral walls 21, 21a, and the upper spiral walls of the upper bottom plates 25, 25a are The tapered spiral channels 22, 22a whose cross-sectional area gradually decreases are completed, but the lower bottom plates 23, 23a
The spiral wall at the lower part of the spiral wall is removed up to the terminal end portions 24, 24a, and the wall surface portion of the spiral wall 21, 21a beyond the terminal end portions 24, 24a is removed by the droplet collision receiving plate 8, as described above. , 8a, and the spiral walls 21, 21a corresponding to the lower parts of the lower bottom plates 23, 23a are cut out, and the spiral walls 2
1 and 21a, the spiral flow path 22,
A gas discharge gap 26, 26a for opening the terminal end of 22a is formed between the opposing wall surfaces of each of the spiral walls 21, 21a extending downward, and
The vicinity of the terminal end of the spiral flow passages 22, 22a is constituted by the flow passage cross section directly at the terminal end 24, 24a of each of the spiral flow passages 22, 22a. Next, each terminal end 24, 24a
A curved surface that is smaller than each radius of curvature of the spiral walls 21, 21a at this position and in the same direction of curvature from the outer wall of the spiral walls 21, 21a at this position toward the inside of each spiral flow path 22, 22a. Separated liquid collecting members 27, 27a formed by winding the separated liquid collecting members 27, 27a into a semi-cylindrical shape are extended, and the upper ends of separated liquid conduits 28, 28a are connected to the lower ends of the semi-cylindrical cylinders of the separated liquid collecting members 27, 27a. The lower ends of the separated liquid conduits 28, 28a are arranged so as to face the upper surfaces of the droplet collision receiving plates 8, 8a, respectively.

The droplet collision receiving plates 8, 8a have a trough-shaped curved surface with a concave portion on the upward side, and both ends in the curved direction are as follows.
The green portions 31 and 31a are formed by winding the curved surface inward with a radius of curvature smaller than the radius of curvature of the curved surface, respectively, and the droplet collision receiving plates 8 and 8a
At one end in the axial direction of the trough formed by the curved surface, a flat plate portion 32, 32a formed at a required height is attached in order to dam the trough portion formed by the curved surface and to prevent the separation liquid from scattering. When the curved surfaces of the droplet collision receiving plates 8, 8a are arranged in the required mirror oblique state that allows the separated liquid to flow out into the separated liquid chamber 11 as described above, the flat plate members 32, 32a , 32a are obliquely arranged with respect to the cross section of the trough portion so that the surfaces of the flat plate members 3 are vertical.
The droplet collision receiving plates 8, 8a to which the droplet collision receiving plates 2, 32a are attached are arranged so that the flat plate members 32, 32a are placed back to back between the vortex axes passing through the respective vortex centers of the spiral shaped bodies 6, 6a, and the turbulent surfaces are opposite to each other. It is placed in the direction.

Next, the configurations of the vertical baffle boards 15, 15a, the first baffle board 16, and the second baffle board 17 will be described in detail.

Vertical baffle boards 15, 15a are spiral walls 21, 21
The vertical baffle boards 15, 15a are made of plate-like members shaped like an arc in the horizontal direction so as to be in close contact with each other along the outer circumferential wall surface of a, and have a required length in the vertical direction. Gap portions 26, 26
The vertical baffle boards 15, 15a are disposed in close contact with the outer peripheral wall surfaces of the spiral walls 21, 21a, respectively, at positions corresponding to the jet direction of the gas discharged from the a, and the lengths of the vertical baffle boards 15, 15a in the arcuate direction are as follows: The length is set to cover the spread of the airflow discharged from the gas discharge gaps 26 and 26a, and the length perpendicular to the arcuate direction is such that the lower end thereof is between the partition plate 9 and the partition plate 9. gas discharge gap 26
, 26a are formed to have a length that maintains a required interval to allow the gas discharged from 26a to flow.

Next, the first baffle board 16 is inserted into the vertical baffle board.
The inner wall of the separation tank body 1 and the vertical baffle board 1
Similarly, a second baffle board 17 is installed above the first baffle board 16 at a required interval, and the first baffle board 16
, the second baffle board 17 has a first baffle board hole 41 and a second baffle board hole 41 each having a cross-sectional area necessary for airflow passage.
Baffle board holes 42 are drilled, and these are connected to the cavity 1.
4 is disposed at a position that deflects the airflow toward the inlet of the gas outflow pipe 13 in a zigzag manner.

Next, the operation of the embodiment according to the present invention will be explained.

The gas containing droplets (hereinafter simply referred to as gas) flows from each gas inlet pipe 7, a of the separation tank body 1, through the inlets 20, 20a of the spiral bodies 6, 6a, and then into the spiral flow path 22, 22a, and the spiral flow path 2
2, 22a.

At this time, the droplets, which have a larger inertia than gas, collect and adhere to the curved inner wall surfaces of the spiral walls 21, 21a forming the outer walls of the spiral channels 22, 22a due to the action of centrifugal force. However, under the influence of gravity, the droplet also migrates with a component directed toward the lower bottom plates 23, 23a of the spiral channels 22, 22a. As the gas progresses through the spiral channels 22, 22a while descending, the radius of curvature of the spiral walls 21, 21a of the spiral channels 22, 22a gradually decreases. The centrifugal force exerted on the unseparated droplets gradually decreases, and at this time, the cross-sectional type of the spiral channels 22, 22a also gradually decreases, so the droplets dispersed in the air flow The chances of them coming into contact with each other and agglomerating increase, and as a result of this aggregation, the particle size of the droplets increases, making them more susceptible to centrifugal action and separating from the airflow, forming a spiral wall as described above. It adheres and collects on the curved inner wall surfaces of the spiral channels 22, 21a, becomes a separated liquid together with the liquid droplets, and continues to the respective lower bottom plates 23, 23a on the curved inner wall surfaces of the spiral channels 22, 22a.
Flows down the outer corner of the vortex toward the center of the vortex. Next, the separated liquid that has flowed down in this way is transferred to the lower bottom plates 23, 23a.
reaches each terminal end 24, 24a of the terminal end 24, 24a.
, 24a, the liquid is collected in the separated liquid collecting members 27, 27a, and then guided to the separated liquid conduits 28, 28a disposed in the separated liquid collecting members 27, 27a, flowing down, and colliding with the droplet collision receiving plate 8.8a. do. Further, the airflow from which the separated liquid has been removed is transmitted to the terminal end portion 2 of the spiral flow path 22, 22a near the center of the vortex.
4, 24a, and collides with the inner surfaces of the spiral walls 21, 21a, which have been extended in one turn, whereby the droplets that remain in the airflow due to fine particles are separated. The separated liquid becomes a separated liquid, and the separated liquid flows through the spiral walls 21, 2.
1a and collides with each droplet collision receiving plate 8, 8a. Next, the airflow that collided with the inner surfaces of the extended spiral walls 21, 21a changes its direction in the opposite direction and is ejected obliquely downward from the gas discharge gaps 26, 26a toward the cavity 14, and then vertically. It reaches the lower part of the cavity 14 through the gap between the lower ends of the baffle boards 15, 15a and the partition plate 9. As described above, the droplets are separated and collected on the respective spiral walls 21, 21a of the spiral channels 22, 22a, and the extended spirals near the terminal ends of the spiral channels 22, 22a. The droplets are separated by the collision of the airflow against the inner surfaces of the walls 21 and 21a, and the droplets are separated from the airflow by the inflow of the airflow into the cavity 14, which will be described later.
On the other hand, the separated liquid that has flown down through the separated liquid conduits 28, 28a and the separated liquid that has flowed down along the inner surfaces of the extended spiral walls 21, 21a fall onto the droplet collision receiving plates 8, 8a. The liquid collides to form a combined and separated liquid, which flows down on the droplet collision receiving plates 8, 8a while being correctly guided by the concave curved surfaces, the edges 31, 31a on both sides, and the slope, and flows down into the respective notches of the partition plate 9. It flows down and is stored in the separated liquid chamber 11 through the section 10.10a, and is appropriately discharged to the outside from the discharge pipe 4 at the lower end of the lower blind plate 3.

Further, the airflow that has reached the lower part of the cavity 14 may be blown up by the first baffle board 16 and the second baffle board 17 within the wide cavity 14 if there are still droplets remaining in the airflow. It rises in a slow deceleration state through the first baffle board hole 41 and the second baffle board hole 42, and during this time, the droplets are finally removed by the gas-liquid sedimentation separation action, and then the gas outflow pipe 13 The air is exhausted in a state containing no more droplets. Note that the cavity 14
The droplets in the airflow that have settled inside the chamber flow down into the separated liquid chamber 11 from the notches 10, 10a of the partition plate 9 and the vent holes 12, and are stored and discharged in the same manner as the combined separated liquid. Since the structure and operation of this invention are as described above,
It has the following effects:

[1] Since the volute separates droplets by distance, it has the same centrifugal acceleration effect as the hollow cone of a cyclone separator, but in the volute, gas-liquid separation occurs due to the swirling of the airflow. Progressing gradually as the flow descends,
During this time, a phenomenon in which the separated liquid diffuses into the airflow and flows out into the gas outflow pipe does not occur.

■ The purpose of centrifugal separation by dividing the incoming airflow into two is to incorporate two spiral shaped bodies into the separation tank body, so the outer dimensions of the separator are smaller than other cyclone separation methods. The effect of centrifugal separation is large.

{3} Since the incoming gas is divided into two parts for processing, the spiral shape body can be made smaller, and therefore the volume occupied within the separation tank body is reduced, and the volume of the cavity inside the separation tank body can be made relatively smaller. can be taken significantly.

Therefore, the droplets separated into gas and liquid at the droplet collision receiving slope can be prevented from being mixed in again by riding on the airflow. '4) The droplets centrifuged inside the spiral body are collected in the separated liquid collecting member, and then guided into the separated liquid conduit and reach the droplet collision receiving plate, and are guided through the spiral flow path near the center of the vortex. Since the liquid does not collide with the spiral wall in the narrow part of the liquid, it is possible to prevent the separated liquid from becoming beads again, thereby ensuring a high gas-liquid oxidation effect.

[51] Since the cross-sectional area of the spiral flow path in the spiral body decreases as it goes from the inlet to the center of the vortex, it promotes mutual aggregation of droplets in the airflow and coarsens the particle size. In addition to forming a droplet size that is susceptible to centrifugal separation, the air velocity is accelerated and centrifugal force is also increased, which improves the separation of droplets.

'61 The spiral flow path for centrifugal separation and the inlet of the gas outflow pipe are separated by a spiral wall forming a spiral shape, and have a structure that does not cause short-circuit flow between them. Psych.

There is no phenomenon in which fine droplets in the inner region of the swirling airflow transfer to the short-circuit flow and flow out into the gas outflow pipe, which occurs in the air separation method. Therefore, the gas-liquid separation efficiency is high.
(7) The part where gas and liquid are separated and the separated liquid is finally discharged is located near the bottom of the separation tank body, and is separated by a head from the gas outlet pipe located diagonally above, so the outflow airflow is There is no chance of re-mixing of droplets inside.

{8' After the separated liquid is removed, the airflow is first introduced into the wide cavity inside the separation tank body, so the airflow velocity in this area is not high, so the droplets are carried back into the airflow. Never. {9} Since the droplets separated from the airflow are immediately isolated as separated liquid in the separated liquid chamber below the partition plate, they are not remixed into the airflow that rises obliquely and flows out.

00) The separated liquid collected in the separated liquid conduit collides with the oblique droplet collision receiving plate and then flows down into the separated liquid chamber. is captured by the ayabe, preventing it from becoming droplets and re-entering the airstream.

0l) Since the two liquid bottle collision receiving plates are symmetrically arranged to have sloped surfaces in opposite directions, when the separated liquid flows into the separated liquid chamber, it is centered on the center of the separated liquid chamber. Does not cause rotational movement.

Therefore, there is no risk of creating a cavity in the central discharge pipe section due to the eddy current. This invention is not limited only to the description and illustrations of the embodiments described above, and can be implemented with various changes and modifications without departing from the technical idea of the invention.

[Brief explanation of the drawing]

Fig. 1 is a schematic horizontal cross-sectional view of a conventional impingement separator, Fig. 2 is a schematic vertical cross-sectional view, Fig. 3 is a schematic plan view of a conventional cyclone separator, and Fig. 4 is a schematic side view with a partial cutaway. FIG. 5 is a partially cutaway plan view of an embodiment of the separator according to the present invention, and FIG. 6 is a partially cutaway side view of the separator according to the embodiment. DESCRIPTION OF SYMBOLS 1... Separation tank body, 2... Upper blind plate, 3... Lower plate, 4... Discharge pipe, 6, 6a... Spiral shaped body, 7, 7a...
Gas inflow pipe, 8, 8a... Droplet collision receiving plate, 9... Partition plate, 10, 10a... Notch, 11... Separated liquid chamber, 12... Ventilation hole, 13...・Gas outflow pipe, 14...Cavity part, 15, 15a...Vertical baffle board, 16...First
Baffle board, 17...Second baffle board, 20,2
0a... Inlet part, 21, 21a... Spiral wall, 22
, 22a... spiral flow path, 23, 23a... lower bottom plate, 2
4, 24a...Terminal part, 25, 25a... Upper bottom plate, 267 26a... gas discharge gap, 27,
27a...Separated liquid collecting member, 28, 28a... Separated liquid conduit. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. Airflow containing droplets is sent into a tapered spiral flow path formed in the separation tank body and has a downward slope, and while swirling and descending, the droplets are exchanged with each other. The separated liquid is aggregated and separated from the air stream by centrifugal force, and the separated liquid is allowed to flow down along the spiral flow path, and then collected and collided with the droplet collision receiving plate, and the air stream from which the separated liquid has been removed is collides with the spiral wall near the end of the spiral flow path to separate droplets still remaining in the airflow, and the separated liquid is allowed to flow down along the spiral wall before passing through the droplet collision receiver. By colliding with the plate, the liquid is merged with the separated liquid, and the combined liquid is caused to flow down through the droplet collision plate to the bottom of the separation tank body and discharged to the outside. A method of separating and removing droplets in the airflow by letting it flow into a wide cavity inside the main body and then exhausting it from above. 2. Attach an upper blind plate 2 to the upper part of the separation tank body 1, which is installed with its axis vertically, and also attach a lower blind plate 3 with a separated liquid discharge pipe 4 connected to the lower part. One end of the gas inflow pipes 7, 7a is exposed, and a partition plate 9 is provided horizontally below the separation tank main body 1 to partition the interior into a separated liquid chamber 11 and a cavity 14. A gas outflow pipe 13 communicating with the cavity 14 is installed above the opposite side of the gas inflow pipes 7, 7a, and two spiral shaped bodies 6, 6a are installed on the side of the gas inflow pipes 7, 7a in the separation tank body 1. Each vortex axis center is the separation tank body 1
The spiral-shaped bodies 6, 6a are provided so as to be parallel to the axis of the
The spiral directions are opposite to each other, and
The wall surfaces of the inlet portions 20, 20a are connected back to back to each other so that the respective spiral portions face each other on both sides with respect to the walls of the respective inlet portions 20, 20a, and are connected to the gas inflow pipes 7, 7a, respectively, and this spiral shape is formed. The opposing spiral walls 21, 21a forming the bodies 6, 6a are connected by lower bottom plates 23, 23a, and the lower bottom plates 23, 23a form a spiral shape with a required downward slope in the downward forward direction. After the required number of turns, the end portions 24, 24a are formed at positions opposite to the direction of gas inflow into the spiral shaped bodies 6, 6a, and each spiral wall 2
1 and 21a are connected to each other by upper bottom plates 25 and 25a at a height that forms spiral channels 22 and 22a with a required cross-sectional area, and furthermore, the lower parts of the lower bottom plates 23 and 23a are Each spiral wall 21, 21a is connected to the terminal end 24.
, 24a, gas discharge gaps 26, 26a are respectively formed between the opposing wall surfaces of the spiral walls 21, 21a which are extended by one turn, and the above-mentioned drooping extensions are formed. Spiral wall 21, 2
The lower end side of 1a faces the upper part of the droplet collision receiving plates 8, 8a which are arranged in the separation tank main body 1 with their inclined surfaces facing oppositely, and the spiral walls 21, 21a at the end portions 24, 24a position. Separate liquid collecting members 27, 27a each having a semi-cylindrical shape extend into the spiral flow paths 22, 22a from the outer wall of the outer wall thereof, and separating liquid conduits 28, 28a are connected to the lower ends of the respective separated liquid collecting members 27, 27a. In addition, the lower ends of these separated liquid conduits 28, 28a are connected to droplet collision receiving plates 8, 8a.
Notches 10, 10a are provided in the partition plate 9 to communicate the distal end sides of the droplet collision receiving plates 8, 8a with the separated liquid chamber 11, and a vent hole 1 also serves as a drain hole.
In addition, vertical bump-full boards 15, 15a are arranged at positions facing each other in the jet direction of the gas discharged from the gas discharge gaps 26, 26a, and the droplet collision receiving plates 8, 8a and the gas outflow A separator for separating and removing droplets in airflow, which is constructed by installing a first buttful board 16 and a second btsful board 17 in a cavity 14 between a pipe 13 and a pipe 13.