JPH05305254A - Cyclon collector - Google Patents

Abstract

PURPOSE:To collect a powder without generating the adhesion and consolidation of the powder on the inner surface of the side wall of a cyclone collector main body even when the gaseous phase of a solid-gas mixed phase stream contains a large amount of steam. CONSTITUTION:A solid-gas mixed phase stream supply device 2 supplying a solid-gas mixed phase stream R containing a powder and air is connected to the upper end part of a vertically long cylindrical cyclone collector main body 1 and an air discharge device 3 discharging the air in the cyclone collector main body 1 to the outside is provided to the cyclone collector main body 1. A jacket 4 receiving the supply of a cooling medium R3 is provided to the lower part of the cyclone collector main body 1 and a dehumidifying air supply port 6 is arranged to the cyclone collector main body 1 at a position higher than the upper end position of the inner surface part of the lower part cooled by the jacket 4 of the main body 1. Dehumidifying air R2 is supplied to the cooled part of the inner surface of the cyclone collector main body 1 from the dehumidifying air supply port 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cyclone collector which can collect powder while cooling or heating it from a solid-gas multiphase flow composed of powder and gas. In the present invention, the cyclone collector body is a portion where the solid-gas mixed phase flow introduced from the solid-gas mixed phase flow supply device is circulated to separate gas and solid (powder).

[0002]

2. Description of the Related Art Cyclone collectors for separating gas and solids (powder) in a solid-gas multiphase flow by utilizing centrifugal force are used in various fields. In this case, the collected fine powder particles have poor fluidity when the temperature is high, and have strong adhesion, so that they are easily deposited and solidified. Therefore, in order to stabilize the process, it is necessary to cool the powder immediately after collecting the powder.
Generally, when heating and cooling fine powder, a fluidized bed heat exchanger is often used. This fluidized bed heat exchanger introduces hot air into the device in the case of heating and cool air in the case of cooling to bring the powder to be heated or cooled into a fluidized state, and to mix hot air or cold air with the powder. It is a structure in which heat exchange is performed between the powder particles to adjust the powder temperature to a predetermined value.

In addition, a "dust collecting and heat exchanging combined device" in which a jacket is provided on the entire side wall of the cyclone collector body (Japanese Patent Laid-Open No. 47-36263), or in the vicinity of the exhaust gas inflow portion of the direct body of the cyclone collector. "Fluid calcination device for lime etc." having a cooling jacket (Japanese Patent Laid-Open No. 63-3035).
No. 0) is known. In addition, an example in which a separating plate is provided in the lower portion inside the cyclone collector body is known in order to prevent large particles from being swirled up in a swirling air current in the lower portion inside the cyclone collector body and jumping out.

[0004]

When cooling or heating the powder collected by the cyclone collector, it is disadvantageous in terms of equipment to install the above fluidized bed type heat exchange device side by side. The fluidized bed heat exchanger has a large apparatus body, requires a large space, and requires expensive auxiliary equipment such as a blower and a cooler. In addition, running costs are high when driving. This is because the principle of the fluidized bed heat exchanger is a method mainly based on heat exchange between powder and gas, and thus the heat transfer efficiency is not good.

A device in which a jacket is arranged on the entire side wall of the cyclone collector body disclosed in Japanese Patent Laid-Open No. 47-36263 or a straight body portion of the cyclone collector disclosed in Japanese Patent Laid-Open No. 63-30350. The device in which the cooling jacket is formed in the vicinity of the exhaust gas inflow portion has an advantage that it is not necessary to install a heat exchanger separately. However, these devices are not so problematic when the solid-gas multiphase flow system to be introduced into the cyclone collector is in a dry state, but when a large amount of water vapor is contained, a serious problem occurs and the operation is almost continued. I can't. This is because the gas phase containing a large amount of water vapor, which forms a solid-gas mixed phase flow, is cooled on the inner surface of the side wall of the cyclone collector body, and the water vapor condenses on the inner surface of the side wall of the cyclone collector body. This is because it adheres to the inner surface and solidifies. If it is attempted to avoid condensation of water vapor on the inner surface of the side wall of the cyclone collector body, the temperature of the refrigerant flowing in the cooling jacket cannot be lowered to a temperature below the dew point of the gas phase of the solid-gas mixed phase flow, and the cooling effect will not be effective. .. Therefore, for a solid-gas mixed-phase flow with high humidity, such as exhaust air from a spray dryer, a device in which a cooling jacket is simply installed on the entire side wall of the cyclone collector, or near the exhaust gas inflow part of the direct body of the cyclone collector. Even if a device having a cooling jacket is used, the corresponding effect cannot be obtained.

In view of the above circumstances, the present invention provides the following (B1)
The content described in is the subject. (B1) Even when the gas phase of the solid-gas mixed phase flow contains a large amount of water vapor, it is possible to collect the powder without causing the adhesion of the powder to the inner surface of the side wall of the cyclone collector body and the solidification of the powder. To do.

[0007]

The present invention devised to solve the above problems will be described below. The elements of the present invention facilitate the correspondence with the elements of the examples or test examples described later. Therefore, the reference numerals of the elements of the examples or test examples are enclosed in parentheses. The reason why the present invention is described in association with the reference numerals of the examples or test examples described below is to facilitate understanding of the present invention and not to limit the scope of the present invention to the examples or test examples.

In order to solve the above problems, the first aspect of the present application
The cyclone collector of the invention has the following structural requirements (A1)
Cyclone collector with (A3) is characterized by having the following constituent requirements (A4), (A1)
A vertically long cylindrical cyclone collector body (1) (A2) having a solid-gas mixed-phase flow supply device (2) for supplying a solid-gas mixed-phase flow (R1) containing powder and gas at its upper end. Gas discharge device (3) for discharging the gas in the collector body (1) to the outside, (A3) Jacket (4) for cooling the lower inner surface of the cyclone collector body (1), (A)
4) A cyclone collector body (1) having a dehumidifying body supply port (6) arranged at a position higher than the upper end position of the lower inner surface portion of the cyclone collector body (1) cooled by the jacket (4). A dehumidification body supply device (U) for supplying a dehumidification body (R2) from the dehumidification body supply port (6) to the cooled portion of the inner surface.

The dehumidification body supply device (U) is a device for supplying the dehumidification body (R2) from the outside of the cyclone collector body (1) to the inside of the cyclone collector body (1). U) is connected to the dehumidification body supply source (eg, pump, air compressor, gas cylinder, etc.), dehumidification body supply port (6) opening inside the cyclone collector body (1), and this dehumidification body supply port (6) The dehumidifying body introducing member (7) and the dehumidifying body (R) from the dehumidifying body supplying source to the dehumidifying body introducing member (7).
2) for supplying the dehumidifying body and the like. The dehumidifying body introducing member (7) is tubular, annular,
Alternatively, it can be configured in a hollow disk shape or the like. The dehumidifying body supply port (6) for supplying the dehumidifying body (R2) into the cyclone collector body (1) may be, for example, the following (C
Structures such as 1) to (C3) can be adopted. (C1) A slit (6) formed in the wall of the cyclone collector body (1) (see FIGS. 2 and 5). (C2) Dehumidifier attached in the tangential direction of the cyclone collector body (1) so that the dehumidifier (R2) is introduced in the same direction as the swirling direction of the solid-gas multiphase flow (R1) inside the cyclone collector body (1). Introducing member (7) (FIG. 6A,
7)) opening (6). (C3) A gas outlet (6) formed in the dehumidifying body introducing member (7) (see FIGS. 8 and 9) disposed inside the cyclone collector body (1).

The slit-shaped dehumidifying body supply port (6) (see FIGS. 2 and 5) of (C1) may be arranged so as to surround the entire circumference of the wall of the cyclone collector body (1), A plurality of slit-shaped dehumidifying body supply ports (6) may be arranged in a broken line at appropriate intervals around the wall of the cyclone collector body (1). In addition, 1 of an appropriate length
Individual slit-shaped dehumidifying body supply ports (6) may be arranged on the wall of the cyclone collector body (1). The shape, direction, etc. of the slit-shaped dehumidifying body supply port (6) are such that the gas supplied from the slit-shaped dehumidifying body supply port (6) is
It must be set so as not to interfere with the flow of the air flow inside the cyclone collector body (1) (the swirling flow of the solid-gas multiphase flow (R1)).

Dehumidifying body introducing member (7) mounted in the tangential direction of the cyclone collector body (1) of (C2)
(See FIGS. 6 and 7) penetrates the side wall of the cyclone collector body (1), and the dehumidification body supply port (6) (see FIGS. 6 and 7) at its tip opens inside the cyclone collector body (1), The gas outflow direction at the opening of the tubular dehumidifying body introducing member (7), that is, the dehumidifying body supply port (6) is the tangential direction of the cyclone collector body (1), and the solid-gas mixed phase flow inside the cyclone collector body (1) It is arranged so as to coincide with the turning direction of (R1). The shape, direction, etc. of the opening of the tubular dehumidifying body introducing member (7), that is, the dehumidifying body supply port (6) installed in the tangential direction is such that the introduced gas has a flow (solid flow) inside the cyclone collector body (1). It must be set so as not to interfere with the swirling flow of gas phase.

The dehumidifying body introducing member (7) having the gas outlet (C3), that is, the dehumidifying body supply port (6),
It may be composed of a single straight pipe, an annular pipe, a fork-shaped pipe or the like, or a disc having a hollow inside or the like. Then, the dehumidifying body introducing member (7) has a gas blowing port having an appropriate shape and number, that is, the dehumidifying body supply port (6).
Can be provided. The shape, direction, etc. of the gas outlet, that is, the dehumidifier supply port (6) is such that the introduced gas impedes the flow of the air flow inside the cyclone collector body (1) (the swirling flow of the solid-gas multiphase flow (R1)). Must be set to not.

Further, in the cyclone collector (S) of the first aspect of the present invention, the cyclone collector main body (1) has a side wall with a height equal to or lower than the position of the dehumidification body supply port (6) of the dehumidification body supply device (U). A jacket (4) for passing a heat medium is provided, the position of which is the position of the upper end of the jacket (4). The jacket (4) may further have an outer wall attached to the outside of the side wall of the cyclone collector body (1),
The side wall of the cyclone collector body (1) may be a double wall having a space portion so that the heat medium is introduced into the space.

When attaching the jacket (4), the reason why the position of the upper end of the jacket (4) is lower than the height of the position of the dehumidifying body supply port (6) of the dehumidifying body supplying device (U). Is the dehumidification body (R2) in which heat exchange of the solid-gas mixed phase flow (R1) swirling inside the cyclone collector body (1) is introduced from the dehumidification body supply device (U).
This is because it is not performed before mixing with (specifically, air with low humidity). When heat exchange (specifically, cooling) of the solid-gas mixed-phase flow (R1) is performed before the mixing, dew condensation occurs in the heat transfer section of the jacket (4) to give moisture to the powder, and as a result, There is a possibility that the powder may solidify or adhere to the inner surface of the side wall of the cyclone collector body (1).

Further, the cyclone collector (S) of the second invention of the present application is characterized in that the cyclone collector (S) of the first invention has the following constituent requirements (A5), (A5) The dehumidification body is arranged at a height higher than the position where the dehumidification body supply port (6) is arranged, with a space allowing powder to pass between the dehumidification body supply port (6) and the inner surface of the cyclone collector body (1). Separation plate (8) that prevents upward movement of (R2).

The separation plate (8) of the second invention divides the inside of the cyclone collector body (1) into an upper part (H) and a lower part (L), and an upper gas (solid-gas mixed phase flow (R1) flowing into the cyclone). , Which is a high-humidity gas, enters the lower part (a part where the humidity is low as a result of the introduction of the low-humidity gas, that is, the dehumidification body (R2) from the dehumidification body supply device (U)). On the other hand, the powder which descends while swirling along the inner surface of the side wall of the cyclone collector body (1) can be freely moved downward.

The mounting position (height) of the separation plate (8) inside the cyclone collector body (1) is such that the separated gas phase outlet (gas discharge) flowing out to the gas discharge device (3) of the cyclone collector (S). It may be set at an appropriate position between a position below the opening of the lower end of the inner cylinder forming the device (3) (see FIG. 2) and above the stacking position of the separated powder. However, it is not preferable that it is too close to the outlet so as to hinder the discharge of the separated gas phase, and
It is also not preferable that the temperature is so low that the cooling of the powder by the jacket (4) is insufficient. The separation plate (8) has a space between the inner surface of the side wall of the cyclone collector body (1) and the outer circumference of the separation plate (8) at a position where the separation plate (8) is attached inside the cyclone collector body (1). Shape and size. A ring shape or a notch shape can be applied to the shape of the interval. The size of the interval is appropriate, but if the interval between the inner surface of the side wall of the cyclone collector body (1) and the outer periphery of the separation plate (8) is too wide, the effect of installing the separation plate (8) will not be sufficiently exhibited. There is a risk. Separation plate (8)
Is generally flat, but may have a cap shape, a bowl shape, an inverted cap shape, or an inverted bowl shape.

Disposing the gas passage tube (11) (see FIG. 7) at the center of the separating plate (8) is particularly effective when the dehumidifying body introducing member (7) having the dehumidifying body supply port (6) is provided. When it is introduced tangentially to the cyclone collector body (1),
The flow of the air flow in the lower part (L) of the separation plate (8) is maintained in a swirl flow, and the powder descending from the upper part (H) is strongly brought into contact with the heat transfer surface by centrifugal force, which is desirable in terms of heat transfer efficiency. The shape.

The separating plate (8) has a heat insulating structure (for example,
Making it hollow, using a heat insulating material, attaching a heat insulating material, etc. is effective in preventing dew condensation on the separation plate (8), and further lowers the temperature of the dehumidifying body (R2) to be introduced. The powder (C) can be effectively cooled together with the cooling (R3) of the jacket (4), which is preferable.
As a method of attaching the separation plate (8) to the inside of the cyclone collector body (1), a general method such as fixing via a fixture can be applied.

In the cyclone collector (S) of the second invention, the jacket is provided at the same height as the position where the separating plate (8) is arranged or at a position lower than the height where the separating plate (8) is arranged. A jacket (4) for passing a heat medium, which is located at the upper end of (4), is arranged on the side wall of the cyclone collector body (1). The jacket (4) is attached so that the upper end of the jacket (4) is at the same height as the position where the separation plate (8) is arranged or lower than the position where the separation plate (8) is arranged. , High-humidity solid-gas mixed phase flow (R) swirling in the upper part (H) inside the cyclone collector body (1)
This is to prevent heat exchange in 1). Heat exchange (specifically cooling) of a solid-gas mixed-phase flow (R1) with high humidity
When it is performed, dew condensation occurs on the heat transfer surface, and as a result, moisture is imparted to the powder, which may cause the powder to solidify or adhere to the inner surface of the side wall of the cyclone collector body (1).

The dehumidifying body introducing member (7) arranged inside the cyclone collector body (1) is formed in the shape of a hollow disk, and a gas blowout port, that is, a dehumidifying body supply port (6) is formed on the side surface and / or the lower surface thereof. It is also possible to provide and also have the function of the separating plate (8).

[0022]

Next, the action of the cyclone collector (S) of the first aspect of the present invention having the above-described structure, when collecting while cooling the powder, is a solid phase formed by the gas phase and the powder having a particularly high humidity. An example will be described in which the gas-mixed phase flow (R1) is separated into gas and powder, and the powder is collected while being cooled. Dehumidifier (R2) (generally dehumidified air) having an absolute humidity lower than the absolute humidity of the gas phase forming the solid-gas multiphase flow (R1)
To the cyclone collector body (1) from the dehumidifying body supply device (U) that opens inside the cyclone collector body (1).
To form a portion mainly containing low-humidity gas in the portion (L) below the dehumidifying body supply port (6) inside the cyclone collector body (1). On the other hand, the portion (H) above the dehumidification body supply port (6) of the dehumidification body supply device (U) is in a high humidity state because the gas of the solid-gas multiphase flow (R1) is the main component. Refrigerant (R
3) (Cold water, cold air) is introduced to cool the wall of the portion (L) below the dehumidifying body supply port (6) inside the cyclone collector body (1).

The solid-gas multiphase flow (R1) flowing from the solid-gas multiphase flow supply device (2) swirls in the upper part of the cyclone collector body (1), and the powder swirls on the inner surface of the side wall of the cyclone collector body (1). Along the way, it moves downward and enters the atmosphere of the gas having a low absolute humidity. Here, the powder comes into contact with the inner surface of the side wall cooled by the refrigerant (R3) introduced into the jacket (4), and further moves downward while being cooled and is collected. Since the humidity of the gas is low in the portion (L) below the dehumidifying body supply port (6) inside the cyclone collector body (1) where the powder is cooled, the inner surface of the side wall of the cyclone collector body (1) has a jacket (4). Even if it is cooled by the refrigerant (R3), the dew does not condense, and therefore the powder does not become moist and adhere or solidify. .. If the temperature of the low-humidity dehumidifier (R2) to be introduced is lowered, the powder is cooled more effectively. Dehumidifier to be introduced (R
The larger the amount of 2) introduced, the more effective it is, but the solid-gas multiphase flow (R
It is not preferable to introduce a large amount of turbulent flow inside the cyclone collector body (1) of 1).

The dehumidifying body (R2) introduced into the cyclone collector body (1) has a low humidity state in the portion (L) below the dehumidifying body supply port (6) inside the cyclone collector body (1), Finally solid-gas multiphase flow (R
It is discharged from the gas discharge device (3) to the outside of the cyclone collector (S) together with the gas phase of 1).

Next, the action of the cyclone collector (S) of the second aspect of the present invention having the above-mentioned structure is similar to that described above, when the powder is collected while being cooled, the gas phase and the powder having a particularly high humidity are used. The solid-gas multiphase flow (R1) formed is separated into gas and powder,
An example will be described in which the powder is collected while being cooled.
A dehumidifying body (R2) (generally dehumidified air) having an absolute humidity lower than the absolute humidity of the gas phase component forming the solid-gas multiphase flow (R1) is opened inside the cyclone collector body (1). The dehumidifier supply port (6) supplies the inside of the cyclone collector body (1) to form a portion mainly composed of a low-humidity gas below the separation plate (8) inside the cyclone collector body (1). .. Separate plate (8)
The upper part (H) is mainly in the gas of the solid-gas mixed phase flow (R1) and is in a high humidity state.
This prevents the gas phase (gas phase containing a large amount of water vapor) of the solid-gas mixed phase flow (R1) from penetrating below the separation plate (8), so that the gas phase part with low humidity and the gas phase part with high humidity Is effectively classified as. Refrigerant (R3) in the jacket (4)
(Cold water, cold air) is introduced to cool the wall of the lower part (L) of the cyclone collector body (1).

The solid-gas multi-phase flow (R1) flowing from the solid-gas multi-phase flow supply device (2) swirls in the upper part (H) inside the cyclone collector body (1), and while swirling the powder, the cyclone collector body (1). The part that moves downward along the inner surface of the side wall and passes through the space between the inner surface of the side wall of the cyclone collector body (1) and the separating plate (8) and mainly includes the dehumidifying body (R2), that is, below the separating plate (8). Reaches part (L). Here, the powder is the refrigerant (R3) introduced into the jacket (4).
It comes into contact with the inner surface of the side wall that is being cooled by and is moved further downward while being cooled to be collected. Since the lower part (L) of the cyclone collector body (1) where the powder is cooled has a low gas humidity, condensation occurs even if the inner surface of the side wall of the cyclone collector body (1) is cooled by the refrigerant (R3) of the jacket (4). Therefore, the powder does not become moist and do not adhere or solidify. Dehumidifier with low humidity to be introduced (R2)
If the temperature is set low, the powder is cooled more effectively. The greater the amount of the low-humidity dehumidifier (R2) introduced, the more effective it is. However, it is not possible to introduce a large amount of the solid-gas mixed-phase flow (R1) in the cyclone collector body (1) so as to disturb the swirling flow. Not preferable.

The dehumidifier (R2) supplied to the inside of the cyclone collector body (1) leaves the lower part (L) below the separating plate (8) in the cyclone collector body (1) in a dry state, and the cyclone collector body (1) ) Separation plate passing through a space between the inner surface of the side wall and the separation plate (8) (or passing through a gas passage pipe (11) (see FIG. 7) arranged at the center of the separation plate (8)) It enters into the upper part (H) from (8) and is finally discharged from the inner cylinder (6) to the outside of the cyclone collector (S) together with the gas phase of the solid-gas mixed phase flow (R1).

As described above, when the cyclone collector (S) of the second invention is used, a portion mainly occupied by the gas phase of the solid-gas mixed phase flow (R1) having high humidity,
Since the part occupied by the introduced dehumidifier (R2) is effectively separated by the separating plate (8),
The high-humidity gas phase and the low-humidity gas phase rarely mix with each other, and a better result than in the case of the first invention can be obtained.

In either case of the cyclone collector (S) of the first invention or the second invention, the humidity of the gas in the vicinity of the part where the powder is cooled (heat transfer part by the jacket (4)) is low. Because of this, the dew point is lowered, and therefore the temperature of the cooling medium passing through the jacket (4) can be made sufficiently low, which greatly contributes to the improvement of cooling efficiency.

The cyclone collector (S) of the present invention exerts a particularly great effect when the powder is separated and cooled in the solid-gas mixed phase flow (R1) having high vapor phase humidity as described above. It goes without saying that there is no problem if it is used for separating and cooling (or heating) powder in the solid-gas mixed-phase flow (R1) having low phase humidity. Or (hot air) is supplied, cooling (or heating) together with cooling (or heating) by the jacket (4)
There is also an advantage that the heating is performed more effectively.

[0031]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples. (Embodiment 1) FIG. 1 is a perspective view of Embodiment 1 of a cyclone collector of the present invention, FIG. 2 is a longitudinal sectional view of Embodiment 1, and FIG. 3 is a plan view of Embodiment 1 of FIG. FIG. 4 is a view seen from the arrow III, and FIG. 4 is a sectional view taken along the line IV-IV in FIG.
1 to 4, the cyclone collector S has a tubular cyclone collector body 1. A solid-gas multiphase flow supply device 2 is connected to the upper end of the cyclone collector body 1. The solid-gas mixed phase flow supply device 2 is composed of a solid-gas mixed phase flow supply pipe 2a connected to the upper end of the cyclone collector body 1 and a device (not shown) for transferring the solid-gas mixed phase flow R1. As can be seen from FIG. 3, the solid-gas multiphase flow supply pipe 2a is arranged to supply the solid-gas multiphase flow R1 from the tangential direction to the inner surface of the side wall of the cylindrical cyclone collector body 1.

At the upper end of the cyclone collector body 1, a gas discharge device 3 is provided in the central portion in a plan view. The gas discharge device 3 is configured by a cylinder (hereinafter, also referred to as “inner cylinder”) concentric with the cylindrical cyclone collector body 1. The gas discharging device 3 has a function of discharging the gas of the solid-gas mixed phase flow R1 supplied into the cyclone collector body 1 and a dehumidifying body R2 described later.

A jacket 4 is provided outside the lower side wall of the cyclone collector body 1, and a refrigerant R3 circulates in the jacket 4. A dehumidifying body supply port 6 composed of a ring-shaped slit opening inside the cyclone collector body 1 is provided slightly above the upper end position of the jacket 4. The slit-shaped dehumidifying body supply port 6 surrounds the entire circumference of the wall of the cyclone collector main body 1, and the dehumidifying body supplied from the dehumidifying body supply port 6 into the cyclone collector main body 1 cleans the inner surface of the side wall of the cyclone collector main body 1. It is arranged so that it blows down. An annular dehumidifying body introducing member 7 that surrounds the dehumidifying body supply port 6 is provided on the side wall of the cyclone collector body 1 (see FIG. 2), and the dehumidifying body introducing member 7 is a dehumidifying body such as a compressor (not shown) with a dehumidifying device. In communication with the source. A dehumidifying body supply device U is constituted by the dehumidifying body supply port 6, the dehumidifying body introducing member 7, the dehumidifying body supply source and the like (not shown).

Next, the action of the cyclone collector S of the first embodiment having the above-mentioned construction is performed by separating the solid-gas mixed-phase flow formed of the vapor phase having high humidity and the powder into the gas and the powder. The case where the body is collected while being cooled will be described. The solid-gas mixed-phase flow flowing from the solid-gas mixed-phase flow supply pipe 2a swirls in the upper portion of the cyclone collector body 1, and the powder moves downward along the inner surface of the side wall of the cyclone collector body 1 while swirling.
On the other hand, the dehumidifying body (generally, dehumidifying air) having an absolute humidity lower than the absolute humidity of the gas phase component forming the solid-gas mixed-phase flow is discharged from the dehumidifying body supply port 6 formed by the annular slit to the cyclone. It is supplied inside the collector body 1,
As a result, the portion (L) below the dehumidifying body supply port 6
Becomes an atmosphere mainly composed of gas having a lower humidity than the upper part (H). At the same time, a refrigerant (cold water, cold air) is introduced into the jacket 4, and the portion (L) below the dehumidifying body supply port 6 inside the cyclone collector body 1 is cooled.

The powder that has moved downward along the inner surface of the side wall of the cyclone collector body 1 enters the atmosphere mainly containing the low-humidity gas, where the powder comes into contact with the inner surface of the cooled side wall, While being cooled, it moves further downward and is collected. In this case, since the portion (L) below the dehumidifying body supply port 6 is an atmosphere mainly composed of a gas with low humidity, even if the inner surface of the side wall is cooled, dew condensation does not occur, so that the powder is wet. Will not stick to or solidify. The dehumidified body introduced into the cyclone collector body 1 is finally discharged from the gas discharge device 3 to the outside of the cyclone collector S together with the gas phase of the solid-gas mixed phase flow.

(Second Embodiment) Next, a cyclone collector S according to a second embodiment of the present invention will be described with reference to FIG. In the description of the second embodiment, constituent elements corresponding to those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. The second embodiment is the same as the cyclone collector S of the first embodiment, except that the cyclone collector body 1
This is different from the first embodiment in that the separation plate 8 is arranged inside. The separating plate 8 is arranged at a position slightly above the slit-shaped dehumidifying body supply port 6, and is arranged with a space for powder passage between the separating plate 8 and the inner surface of the side wall of the cyclone collector body 1. .. The separation plate 8 effectively separates the interior of the cyclone collector body 1 into an upper (H) atmosphere (high temperature and humidity atmosphere) and a lower (L) atmosphere (low temperature and humidity atmosphere). The cyclone collector S of the second embodiment is configured similarly to the cyclone collector S of the first embodiment in other points.

Next, the action of the cyclone collector S of the second embodiment having the above-described structure is performed by separating the solid-gas mixed-phase flow R1 formed by the vapor phase having high humidity and the powder into the gas and the powder, A case where the powder is collected while being cooled will be described. The dehumidifying body R2 (generally, dehumidifying air) having an absolute humidity lower than the absolute humidity of the gas phase component forming the solid-gas mixed-phase flow R1 flows from the slit-like dehumidifying body supply port 6 to the inside of the cyclone collector body 1. When it is supplied to the above, the part (L) below the separation plate 8 becomes an atmosphere mainly composed of gas with low humidity. At the same time, the refrigerant R3 (cold water, cold air) is introduced into the jacket 4, and the wall of the portion (L) below the dehumidifying body supply port 6 inside the cyclone collector body 1 is cooled.

The solid-gas mixed phase flow R1 flowing from the solid-gas mixed phase flow supply pipe 2a of the solid-gas mixed phase flow supply device 2 of the cyclone collector S.
Swirls in the upper portion of the cyclone collector body 1, and the powder moves downward along the inner surface of the side wall of the cyclone collector body 1 while swirling, and passes through the space between the inner surface of the side wall of the cyclone collector body 1 and the separation plate 8 to Low humidity gas R2
In the atmosphere mainly containing the powder, the powder comes into contact with the inner surface of the side wall of the cooled cyclone collector body 1 and moves downward while being cooled to be collected. In this case, since the portion (L) below the dehumidifying body supply port 6 is an atmosphere mainly composed of the gas R2 having a low humidity, even if the inner surface of the side wall is cooled, dew condensation does not occur, so that powder is not formed. Does not stick to moisture or solidify.

The separation plate 8 prevents the gas phase (gas phase containing a large amount of water vapor) of the solid-gas mixed phase flow R1 from entering below the separation plate 8. Therefore, the gas phase having high humidity and the gas phase having low humidity are hardly mixed with each other, and a better result can be obtained as compared with the case where the cyclone collector S of the first embodiment is used. The dehumidifying body introduced into the cyclone collector body 1 moves upward through the space between the inner wall of the side wall of the cyclone collector body 1 and the separation plate 8 and finally, together with the gas phase of the solid-gas mixed phase flow R1, the gas. It is discharged from the discharge device 3 to the outside of the cyclone collector S.

(Third Embodiment) Next, a cyclone collector S according to a third embodiment of the present invention will be described with reference to FIG. 6A and 6B are explanatory views of the cyclone collector S of Embodiment 3, FIG. 6A is a vertical sectional view thereof, and FIG. 6B is a top view thereof. In the description of the third embodiment, constituent elements corresponding to those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. The cyclone collector S of the third embodiment differs from the cyclone collector S of the second embodiment in the structure of the dehumidifying body supply device U for supplying the dehumidifying body to the inside of the cyclone collector body 1. In FIG. 6, the dehumidifying body supply device U for the cyclone collector S of the third embodiment has a dehumidifying body supply port 6 which is open to the inner surface of the cyclone collector body 1 and blows out the dehumidifying body R2 in the tangential direction of the inner surface. .. A dehumidifying body introducing member 7 penetrating the side wall of the cyclone collector body 1 is connected to the dehumidifying body supply port 6. The dehumidifying body supply port 6 and the dehumidifying body introducing member 7 are
The dehumidifying body R2 blown out from the dehumidifying body supply port 6 is arranged so as to swirl along the inner surface of the side wall of the cyclone collector body 1, and the swirling direction is the solid-gas mixed phase flow R1 supplied to the upper end of the cyclone collector body 1. It is set to be the same as the turning direction of. The dehumidifying body supply device U of the third embodiment includes the dehumidifying body supply port 6, the dehumidifying body introducing member 7, and a compressor with a dehumidifying device (not shown). The cyclone collector S of the third embodiment is configured similarly to the cyclone collector S of the second embodiment in other points. The cyclone collector S of the third embodiment also has the same operation as the cyclone collector S of the second embodiment. In addition, the cyclone collector S of the third embodiment has a dehumidifying body R2 supplied inside the cyclone collector body 1.
Swirls in the same direction as the swirling direction of the solid-gas multiphase flow R1, so that the swirling of the solid-gas multiphase flow R1 is not hindered.

(Fourth Embodiment) Next, a cyclone collector S according to a fourth embodiment of the present invention will be described with reference to FIG. In the description of the fourth embodiment, constituent elements corresponding to those of the third embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. The cyclone collector S of the fourth embodiment
A gas vent pipe 11 is provided at the center of the separation plate 8 arranged inside the cyclone collector body 1. The gas ventilation pipe 11 extends vertically through the separation plate 8. The cyclone collector S of the fourth embodiment is configured similarly to the cyclone collector S of the third embodiment in other points. The cyclone collector S of the fourth embodiment
Has the same effect as that of the third embodiment, because an atmosphere mainly containing a low-humidity gas is formed in the lower portion (L) of the cyclone collector body 1. Further, the dehumidifying body R2 supplied to the lower portion of the cyclone collector body 1 is finally discharged from the gas discharging device 3, but most of the part is guided to the gas discharging device 3 by the gas ventilation pipe 11. .. Therefore, the amount of the dehumidifying body moving upward in the interval between the outer peripheral edge of the separating plate 8 and the inner surface of the side wall of the cyclone collector main body 1 is reduced, so that the movement of the powder passing downward through the interval is less obstructed. Become. Further, the flow of the air flow in the lower portion L of the separation plate 8 is maintained as a swirl flow, and the powder descending from the upper portion H is brought into contact with the cooled portion of the inner surface of the side wall 1 of the collector body by the centrifugal force. Desirable for thermal efficiency.

(Fifth Embodiment) Next, a cyclone collector S according to a fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is an explanatory view of the cyclone collector S of the fifth embodiment, FIG. 8A is a vertical cross-sectional view thereof, and FIG. 8B is a view of the annular dehumidifying body introducing member 7 shown in FIG. 8A as viewed from below. In the description of the fifth embodiment, constituent elements corresponding to those of the second embodiment (see FIG. 6) are designated by the same reference numerals, and detailed description thereof will be omitted. The cyclone collector S of the fifth embodiment is different from the cyclone collector S of the second embodiment in the structure of the dehumidifying body supply device U for supplying the dehumidifying body to the inside of the cyclone collector body 1. In FIG. 8, the dehumidifying body supply device U of the cyclone collector S of the fifth embodiment
Is provided with an annular dehumidifying body introducing member 7 disposed inside the cyclone collector body 1. As shown in FIG. 8B, a large number of dehumidifying body supply ports 6 are formed on the lower surface of the dehumidifying body introducing member 7 to blow the dehumidifying body R2 downward. Dehumidifying Body Supply Device U of this Embodiment 3
Includes a dehumidifying body supply port 6, a dehumidifying body introducing member 7, and a device for supplying a dehumidifying body to the dehumidifying body introducing member 7 from a compressor with a dehumidifying device (not shown). The cyclone collector S of the fifth embodiment is configured similarly to the cyclone collector of the second embodiment in other points. The cyclone collector according to the fifth embodiment also has the same operation as that of the cyclone collector according to the second embodiment, because an atmosphere mainly containing a low humidity gas is formed in the lower portion (L) of the cyclone collector body 1.

(Sixth Embodiment) Next, a cyclone collector S according to a sixth embodiment of the present invention will be described with reference to FIG. 9A and 9B are explanatory views of the cyclone collector S of Example 6, FIG. 9A is a vertical cross-sectional view thereof, and FIG. 9B is a view of the disk-shaped dehumidifying body introducing member 7 shown in FIG. 9A as viewed from below. is there. In the description of the sixth embodiment, constituent elements corresponding to those of the fifth embodiment (see FIG. 8) are designated by the same reference numerals,
Detailed description thereof will be omitted. In the cyclone collector S of the sixth embodiment, the structure of the dehumidifying body supply device U for supplying the dehumidifying body to the inside of the cyclone collector body 1 is the same as that of the fifth embodiment.
It is different from the cyclone collector S of.

In FIG. 9, the dehumidifying body supplying device U of the cyclone collector S of the sixth embodiment is provided with a disk-shaped dehumidifying body introducing member 7 arranged inside the cyclone collector body 1. 9B is provided on the lower surface of the dehumidifying body introducing member 7.
As shown in FIG. 5, a large number of dehumidifying body supply ports 6 are formed downward to blow out the dehumidifying bodies R2. In the cyclone collector S of the sixth embodiment, the disk-shaped dehumidifying body introducing member 7 has a function of separating the inside of the cyclone collector body 1 into an upper portion (H) and a lower portion (L). 5 (see FIG. 8) is omitted. The cyclone collector S of the sixth embodiment is configured in the same manner as the cyclone collector of the fifth embodiment in other points. The cyclone collector according to the sixth embodiment also has the same operation as that of the cyclone collector according to the fifth embodiment because an atmosphere mainly containing a low-humidity gas is formed in the lower portion (L) of the cyclone collector body 1.

[Test Example] A test cyclone collector S having the same shape as in Example 1 (see FIGS. 1 to 4) was used as a control test and a test A.
In addition, the test cyclone collector S having the same shape as that of the second embodiment (see FIG. 5) was used for the test B, and the powder (the powder and the high-humidity gas phase) which accompanied the high humidity air was used. A model of the solid-gas multiphase flow R1 formed by and) was cooled and separated from air.

1. Structure and Size of Test Cyclone Collector S (1) Common Items 1) Structure: Normal Type 2) Cyclone Collector Body 1 Cylindrical Body Diameter: 270 mm 3) Cyclone Collector Body 1 Cylindrical Length: 300 mm 4 ) Cyclone collector body 1 Conical length: 600 mm 5) Solid-gas multiphase flow supply pipe 2a (solid-gas multiphase flow R1 inflow part) Cross-sectional area: 40 mm x 80 mm 6) Gas discharge device 3 inner cylinder diameter: 100 mm 7) Jacket 4 transmission Heat area: 0.156 square m 8) Dehumidifier R2 (secondary air) Dew point: -14 ° C 9) Width of slit (dehumidifier supply port) 6: 2 mm

(2) Characteristics of the cyclone collector S in each test 1) Control test The cyclone collector S (the embodiment of FIG. 2) provided with the slit-shaped dehumidifier supply port 6 for introducing the dehumidifier R2 (secondary air). The same shape as 1) was used. However, dehumidifier supply port 6
The conduit for connecting the dehumidifying body supply source and the dehumidifying body supply source is closed, and the dehumidifying body (secondary air) R2 from the dehumidifying body supply port 6 is not introduced. 2) Test A The same cyclone collector S (same shape as that of Example 1 in FIG. 2) provided with the slit-shaped dehumidifying body supply port 6 for introducing dehumidified air (secondary air) R2 was used as in the control test. ..
A dehumidifying body (secondary air) R2 was introduced from the dehumidifying body supply port 6. 3) Test B A cyclone collector S having the slit-shaped dehumidifying body supply port 6 for introducing the dehumidifying body (secondary air) R2 and the separating plate 8 (same shape as that of the second embodiment in FIG. 5) was used. A dehumidifying body (secondary air) R2 was introduced from the dehumidifying body supply port 6. Shape of separation plate 8: disk shape Distance between separation plate 8 and inner surface of cyclone collector S side wall: 1
0 mm

2. Lines used for the test and powder (1) Device The device (cyclone collector S) shown in FIGS. 1 to 4 was constructed by modeling exhausted air when skim milk powder was produced by the spray drying method. Using a hot air generator (GX-40, manufactured by Daiko Co., Ltd.), hot air at 230 ° C. was passed through the pipeline, and skim milk powder was supplied to the middle of the pipeline by an arcuate feeder (600 type, manufactured by Kuma Engineering Co., Ltd.), The upper end of the cyclone collector S (solid gas mixed phase flow R1 inflow part) as solid gas mixed phase flow R1 by a blower (Asahi Kiko Co., Ltd., model 65-400)
Was made to flow into. A vapor spray (manufactured by Spraying Co., 1 / 8K50) was used for the solid-gas multiphase flow R1.
Steam was applied.

(2) Conditions for solid-gas mixed phase flow R1 1) Skim milk powder particle size: average particle size 47 μm 2) Dust concentration: 500 g / cubic m 3) Dew point: 8-10 ° C.

(3) Dehumidifier (secondary air) R2 1) Adjustment of dehumidifier R2: Air from the compressor is adjusted using a dehumidifier (Asahi Glass Co., Ltd., air dryer "Sunseppo W") It was supplied from the slit-shaped dehumidifying body supply port 6 via. 2) Temperature: 30 ° C 3) Dew point: -14 ° C

3. Operating Conditions 1) Air amount of solid-gas multiphase flow R1 flowing into the cyclone collector S: 5 cubic m / min 2) Temperature of air of solid-gas multiphase flow R1 flowing into the cyclone collector S): 80 ° C. 3) Jacket cold water temperature: Control test = 10 to 11 ° C, Test A = 10 to 11 ° C, Test B = 2 ° C 4) Dehumidified air (secondary air) R2 introduction amount: Control test = 0 Test A = 600NL / min , Test B = 80 NL / min

4. Results Table 1 shows some of the above operating conditions and the results of numerical measurements of each test.
Shown in.

[0053]

[Table 1]

The findings of each test are as follows. 1) Control test In order to increase the cooling capacity to the limit, the temperature of the cooling water in the jacket 4 flows into the cyclone collector S in a solid-gas multiphase flow R1.
Was operated at a temperature slightly higher than the air dew point of
The powder started to adhere to the heat transfer surface 5 to 6 minutes after the start of operation, and finally adhered and blocked. When the humidity of the air of the solid-gas multiphase flow R1 flowing into the cyclone collector S was changed, there was some fluctuation in the operating time, but even a slight change in humidity would cause sticking and blockage, making stable continuous operation impossible. It was possible. 2) Test A A test was performed under the same conditions as the control test except that dehumidified air (secondary air) R2 was introduced, but no powder adhesion was observed on the heat transfer surface, and extremely stable continuous operation was performed. It was possible. Even if the humidity of the air of the solid-gas multiphase flow R1 flowing into the cyclone collector S is changed, it does not stick or block,
Continuous operation was possible. 3) Test B A small amount of dehumidified air (secondary air) R2 was required as compared with Test A, and stable continuous operation was possible even if the cooling water temperature of the jacket 4 was lower than that of Test A. Since the temperature of the cooling water could be lowered, the cooling capacity was greatly improved. Even if the humidity of the air of the solid-gas multiphase flow R1 flowing into the cyclone collector S was changed, it did not stick or block, and continuous operation was possible.

From the above results, the cyclone collector S of the first invention of the present application is a normal cyclone collector S, or a cyclone collector S in which a jacket is provided on the entire side wall of the cyclone collector body 1, or a cyclone collector straight body. It can be seen that it is superior to the cyclone collector S or the like in which a cooling jacket is formed in the vicinity of the exhaust gas inflow part of the section. Further, it can be seen that the cyclone collector S of the second invention of the present invention is far superior to the cyclone collector S of the first invention of the present invention.

[0056]

The effects of the present invention are as follows. (1) It is possible to separate the gas of the solid-gas multiphase flow containing water vapor from the solid (powder), and to cool the solid (powder) without individualizing.

[Brief description of drawings]

FIG. 1 is a perspective view of a cyclone collector according to a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of the first embodiment.

FIG. 3 is a plan view of the first embodiment as seen from the arrow III in FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a vertical sectional view of a cyclone collector according to a second embodiment of the present invention, showing an example in which a separation plate 8 is provided.

6A and 6B are explanatory views of a cyclone collector S according to a third embodiment, FIG. 6A is a vertical sectional view thereof, and FIG. 6B is a top view thereof.

FIG. 7 is a vertical sectional view of a cyclone collector S according to a fourth embodiment.

8 is an explanatory view of a cyclone collector S of a fifth embodiment, FIG. 8A is a vertical cross-sectional view thereof, and FIG. 8B is a view of the annular dehumidifying body introducing member 7 shown in FIG. 8A seen from below. Is.

9 is an explanatory view of a cyclone collector S of Example 6, FIG. 9A is a longitudinal sectional view thereof, and FIG. 9B is a disk-shaped dehumidifying body introducing member 7 shown in FIG. 9A from below. It is the figure seen.

[Explanation of Codes] H ... upper part inside cyclone collector body, L ... lower part inside cyclone collector body, R1 ... solid gas mixed phase flow, R2 ... dehumidifying body (dehumidifying air), R3 ... refrigerant, S ... cyclone collector, U ... dehumidifying body Supply device, 1 ... Cyclone collector body, 2 ... Solid-gas mixed-phase flow supply device, 3 ... Gas discharge device, 4 ...
Jacket, 6 ... Dehumidifying body supply port, 7 ... Dehumidifying body introducing member, 8 ... Separating plate, 11 ... Gas passage tube,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Saeki 1-37-19 Minamigai, Higashiyamato-shi, Tokyo Morinaga Minamigai Dormitory (72) Masatsugu Takahashi 1040-8 Shimbashicho, Izumi-ku, Yokohama-shi, Kanagawa

Claims (2)

[Claims] 1. A cyclone collector having the following constituent features (A1) to (A3), wherein:
4) equipped with a cyclone collector,
(A1) A vertically long cylindrical cyclone collector body having a solid-gas mixed phase flow supply device for supplying a solid-gas mixed phase flow containing powder and gas at the upper end, and (A2) gas in the cyclone collector body A gas discharge device for discharging outside (A
3) A jacket for cooling the lower inner surface of the cyclone collector body; (A4) A dehumidifying body supply port arranged at a position higher than the upper end position of the lower inner surface portion of the cyclone collector body cooled by the jacket. A dehumidifying body supply device for supplying a dehumidifying body from the dehumidifying body supply port to the cooled portion of the inner surface of the collector body. 2. The cyclone collector according to claim 1, comprising the following constituent features (A5):
5) At a position higher than the position where the dehumidifying body supply port is arranged, a space is provided between the inner surface of the cyclone collector body for allowing powder to pass therethrough, and Separation plate that prevents movement.