JPH059071Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a mixing deaeration device that can mix and dehumidify a plurality of types of powder.

[Prior art]

For example, slag cement is manufactured by mixing a plurality of types of powder, and the manufacturing process thereof will be explained based on FIG. 2.

Granulated slag is made by rapidly cooling dissolved slag with water.
The hot air is supplied to the inside of the crusher 1 into which hot air is blown,
This pulverizer 1 performs dry pulverization.

The granulated slag dried and crushed by the crusher 1 is collected by a bag filter 2 and then supplied to a mixer 4 together with the gypsum collected by a bag filter 3.

Slag cement produced by mechanically stirring the granulated slag powder and gypsum powder using a mixer 4 is transported to a silo 6 by a bucket elevator 5.

Thereafter, the slag cement is packed into bags and shipped as a product.

In the figure, reference numerals 7 and 8 are blowers connected to the bag filters 2 and 3, respectively, for sucking air inside each bag filter 2 and 3.

[Problem that the invention attempts to solve]

However, in the above-mentioned slag cement manufacturing process, the humid hot air generated when the granulated slag is dried and pulverized in the crusher 1 is not completely removed by the blower 7 of the bag filter 2, and the granulated slag is The powder is supplied to the mixer 4 while remaining confined in the powder. Therefore, there was a problem that this moist hot air acted on the slag cement as a product in the silo 6, causing the slag cement to solidify.

Additionally, mechanical stirring by the mixer 4 alone does not result in uniform mixing of the granulated slag and gypsum powders, and the quality of the slag cement differs depending on the bag filled with the slag cement product. The points were also hot.

Therefore, it is an object of the present invention to provide a mixing and deaeration device that can be applied to, for example, the above-mentioned slag cement manufacturing process and can uniformly mix and dehumidify a plurality of types of powder.

[Means for solving problems]

In order to achieve the above object, the main means adopted by the present invention are: a mixing deaeration tank for introducing multiple types of powder; an air blowing means for blowing dry air onto the body and dehumidifying the powder while mixing it; an exhaust means connected to the mixing degassing tank and exhausting moist air out of the tank; A discharge means provided in the deaeration tank for discharging the mixed and dehumidified powder to the outside of the tank; and a discharge means provided downstream of the discharge means in the powder delivery direction to further mix the powder by mechanical stirring. This is a mixing and deaerator comprising a mixing device for.

[Effect]

The plurality of types of powder introduced into the mixing and degassing tank are stirred and mixed by dry air ejected from the air ejecting means, and the dry air is replaced with moist air.

The moist air is discharged out of the tank through the discharge means, while the mixed and dehumidified powder is supplied to the mixing device through the discharge means.

Then, the powder is further mechanically stirred by the mixing device and mixed uniformly.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. still,
The following example is an example embodying the present invention, and is not intended to limit the technical scope of the present invention.

Here, FIG. 1 is a block diagram of a mixing deaerator according to an embodiment of the present invention.

As shown in FIG. 1, the mixed deaeration device according to this embodiment includes a mixed deaeration tank 9 for introducing a plurality of types of powder (for example, granulated slag powder and gypsum powder), and the above-mentioned mixed deaeration tank 9. an air blowing means 10 for blowing dry air onto the powder introduced into the mixing deaeration tank 9 and dehumidifying the powder while mixing it; and the mixing deaeration tank 9.
an exhaust port 11 (exhaust means) connected to the mixing deaeration tank 9 for exhausting moist air to the outside of the tank; and an exhaust port 11 (exhaust means) connected to the mixing deaeration tank 9 for exhausting the mixed and dehumidified powder to the outside of the tank. A pug mill 13 (mixing device) is provided on the downstream side of the exhaust port 12 in the powder delivery direction and further mixes the powder by mechanical stirring. There is.

The mixed deaeration tank 9 has an input port 9a for charging the granulated slag powder from the bag filter 2 (see Figure 2), and an input port 9a for charging the gypsum powder from the bag filter 3 (see Figure 2). A supply port 9b for supplying by pneumatic transport is provided orthogonally.
That is, by introducing granulated slag powder from a direction perpendicular to the flow of pneumatically transported gypsum powder,
A relatively efficient mixing effect can be obtained.

The air blowing means 10 includes a blower 14 for supplying dry air into the mixing deaeration tank 9, and a blower 14 for supplying dry air into the mixing deaeration tank 9.
The perforated plate 15 has a large number of through holes for uniformly discharging water over the entire area. Therefore, the dry air blown out from the perforated plate 14 fluidizes both powders in the mixing and degassing tank 9 and mixes them efficiently. will be replaced with

In addition, in order to obtain a cooling effect for the powder in addition to the mixing and degassing of the powder, the amount of the dry air is 5 to 50% relative to the amount of powder supplied to the mixing and degassing tank 9. 20
It has become clear from the experimental results that m ³ /ton is extremely effective.

A bag filter 16 is connected to the exhaust port 11, and the dust collected by the bag filter 16 is supplied to the pug mill 13 together with the powder discharged from the exhaust port 12.

In the mixed deaerator according to the present invention configured as described above, the granulated slag powder from the bag filter 2 (see FIG. 2) is supplied into the mixing deaerator tank 9 from the input port 9a, and on the other hand, Gypsum powder from the bag filter 3 is supplied into the mixing deaeration tank 9 through the supply port 9b by pneumatic transport.

Both powders in the mixing and deaeration tank 9 are fluidized by the dry air blown out from the perforated plate 15 and mixed efficiently, and the moist and hot air contained in the powders is kept at a fresh temperature. The dry air is replaced with a relatively low amount of dry air.

The humid air is supplied to the bag filter 16 through the exhaust port 11, and after being collected by the bag filter 16, it is discharged into the atmosphere.

Both powders, which have been efficiently mixed and dehumidified in the mixed deaeration tank 9, are discharged from the discharge port 12, and are supplied to the pug mill 13 together with the powder collected by the bag filter 16.

Then, by further mechanically agitating both of the powders in the pug mill 13, a deaerated slag cement with no mixed unevenness is produced.

The above slag cement is
(See FIG. 2), the product is transported to a silo 6 and packed into bags as a product of stable quality that will not solidify.

In the above embodiment, it is also possible to supply granulated slag powder, instead of gypsum powder, into the mixing deaeration tank 9 by pneumatic transport from the supply port 9b.

In addition, in this example, the case where both powders of granulated slag and gypsum are mixed and degassed is explained as an example, but mixing and deaeration are required instead of the above two powders. It goes without saying that it is also possible to use the above-mentioned mixing and deaerator for other powders.

[Effect of idea]

As described above, the present invention includes a mixing deaeration tank for introducing multiple types of powder, and a method of blowing dry air to the powder introduced into the mixing deaeration tank to mix the powder. air blowing means for dehumidifying the air while dehumidifying the air;
Exhaust means connected to the mixed deaeration tank and for exhausting moist air to the outside of the tank, and exhaust means provided in the mixing deaeration tank for discharging the mixed and dehumidified powder to the outside of the tank. and a mixing device provided on the downstream side of the discharge means in the powder delivery direction for further mixing the powder by mechanical stirring, For example, by applying the above-mentioned mixing and deaerator to the slag cement manufacturing process, it becomes possible to provide dehumidified and uniformly mixed slag cement of excellent quality.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a mixing deaerator according to an embodiment of the present invention, and FIG. 2 is a circuit diagram of a slag cement manufacturing facility for explaining the background technology of the present invention. Explanation of symbols, 9...Mixing deaeration tank, 10...Air blowing means, 11...Exhaust port (exhaust means), 12...
...Discharge port (discharge means), 13... Pug mill (mixing device), 14... Blower, 15... Perforated plate.

Claims (1)

[Scope of Claim for Utility Model Registration] A mixing deaeration tank for introducing a plurality of types of powder, and dry air being blown onto the powder introduced into the mixing deaeration tank, while mixing the powder. an air blowing means for dehumidifying; an exhaust means connected to the mixing deaeration tank for exhausting moist air out of the tank; and an exhaust means provided in the mixing deaeration tank for discharging the mixed and dehumidified powder. It is characterized by comprising: a discharge means for discharging the powder to the outside of the tank; and a mixing device provided downstream of the discharge means in the direction in which the powder is carried out and further mixing the powder by mechanical stirring. mixed deaerator.