JPH0318491Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is based on a vertical processing tank that connects a supply path for raw coarsely pulverized coal and water, and a take-out path for the pulverized product. In addition to filling a large number of spherical bodies for pulverization, a driving screw shaft is installed to agitate the spherical bodies, and by the stirring movement of the spherical bodies, raw material coarsely pulverized coal is pulverized and mixed with water to be used as fuel. This invention relates to a vertical crushing device for producing coal-water slurry.

[Conventional technology]

Conventionally, a vertical pulverizer for producing coal-water slurry is constructed by using a vertical processing tank 1 on the upper end side filled with pulverizing spherical bodies 2 and equipped with a driving screw shaft 3, as shown in FIG. The feed line 4 for coarsely pulverized raw coal is connected to the pulverized raw coal, and the pulverized product taken out as an overflow fluid from the upper end of the vertical treatment tank 1 is mixed with the water supplied from the water supply pipe W. A first water elutriation 8 and a second water elutriation 9 are arranged in series for specific gravity separation, and the sorted material is in a predetermined coal particle size state, which is sorted by the first water elutriation 8 and the second water elutriation 9.
That is, the pipe 10 for taking out the coal-water slurry as a product is connected to the second elutriator 9, and on the other hand, the sorted material, which has not yet been sufficiently pulverized and has coarse coal particles, is mixed with feed water and fed into the first water elutriator. A pump P was provided to take out the water from the elutriation 8 and the second elutriation 9 and re-supply it to the lower end side of the vertical treatment tank 1. (Refer to JP-A No. 56-4690.) [Problems to be solved by the invention] However, although the above-mentioned conventional structure is suitable for producing low-viscosity coal slurry, it cannot be used directly as a fuel like oil. Regarding the production of high-concentration coal slurry, which has attracted attention in recent years because it can be used as
Due to this large size, the elutriation effect is greatly reduced, and therefore large particles that have not been sufficiently pulverized, i.e., both the feed passage for raw coarsely pulverized coal and the outlet for the pulverized material are vertically connected. Large particles of coal flowing out of the mold treatment tank may mix into the product slurry, significantly reducing the quality of the product slurry, or requiring the addition of another screen device to separate and remove the mixed large particles. However, there were problems such as increased equipment costs and operating costs and decreased manufacturing efficiency.

The purpose of the present invention is to make it possible to produce high-quality, highly concentrated coal slurry free of large particles while simplifying the production equipment through a rational and simple improvement to the vertical crushing tank. Moreover, the manufacturing efficiency can be effectively improved.

[Means for solving problems]

The characteristic structure of the pulverizing apparatus for producing coal-water slurry according to the present invention is that a vertical processing tank filled with spherical bodies for pulverization processing and equipped with a drive screw shaft has a supply path for raw pulverized coal and water and a pulverization processing tank in the vertical direction. A first processing chamber is connected to a take-out passage for the finished product on opposite sides, and the inside of the vertical processing tank is communicated with the supply passage through a perforated plate-like body that only allows passage of the crushed product. The spherical bodies are divided into a second processing chamber which communicates with the channel, and among the spherical bodies, those with a large diameter are filled in the first processing chamber, and those with a small diameter are separately filled in the second processing chamber. , its actions and effects are as follows.

[Effect]

In other words, with the above configuration, the raw material coarsely pulverized coal and water supplied from the supply path always pass through the vertical pulverization processing path of the vertical processing tank before reaching the take-out path located on the vertically opposite side of the supply path. Therefore, it is possible to reliably prevent the bypass outflow of large particles of coal that occurs in conventional devices.

Therefore, by appropriately setting the interval between the supply path and the take-out path that are connected to each other on the opposite sides,
Regardless of the viscosity of the product slurry, a high-quality coal-water slurry is obtained from the outlet passage in which the raw material coarsely pulverized coal and water have been sufficiently and reliably pulverized and kneaded without contamination with large-diameter coal particles that can cause quality deterioration. be able to.

Furthermore, since the product slurry can be obtained directly from the take-out channel as described above, the overall structure of the manufacturing apparatus itself can be simplified compared to conventional apparatuses that always require an elutriation device or a screen device.

Furthermore, the inside of the vertical processing chamber is partitioned into a first processing chamber and a second processing chamber with a porous plate-like body that only allows the passage of the pulverized material, and the first processing chamber communicating with the supply path has a large diameter. and a second spherical body communicating with the extraction path.
The processing chamber is filled with small-diameter spherical bodies separately, and in the first stage of the pulverization process, which requires a large grinding force to crush large particles, only the large-diameter spherical bodies are used to crush relatively small particles. The required grinding force is relatively small, and it is possible to grind more effectively by increasing the frequency of contact with the spherical bodies, so in the latter stages of the grinding process, the grinding process is performed only with small-diameter spherical bodies. Filling the entire vertical treatment tank with spherical bodies of a single diameter, or
Compared to filling spherical bodies of large and small diameters in a mixed state,
The overall pulverization processing efficiency can be greatly improved.

[Effect of idea]

As a result of the above, an excellent pulverizer that can produce high-quality, high-concentration coal-water slurry extremely efficiently can be achieved with favorable equipment costs and operating costs.

〔Example〕

Next, an embodiment of the present invention will be described based on FIG.

A vertical processing tank 1 having a cylindrical shape with a bottom is filled with a large number of spherical bodies 2 for pulverization, and a drive screw shaft 3 for stirring and moving the filled spherical bodies 2 is provided over almost the entire vertical length of the processing tank 1. A supply pipe 4 for supplying coarsely pulverized raw coal, water, and a surfactant into the treatment tank 1 in a mixed state at a predetermined ratio is connected to the upper end of the treatment tank 1. A pipe line 5 for taking out the processed product from the processing tank 1 is connected to the lower end of the processing tank 1, and the pulverized product is forcibly extracted from the processing tank 1 and transported through the pipe line 5. A pump 6 for this purpose is installed, thereby forming a vertical crushing apparatus for producing highly concentrated coal-water slurry.

The interior of the vertical processing tank 1 is communicated with the first processing chamber 1A on the upper half side of the processing tank, which communicates with the supply pipe 4, and the take-out pipe 5 through a porous plate-shaped body 7 that only allows the passage of the pulverized material. The first processing chamber 1A and the second processing chamber 1B are partitioned into a second processing chamber 1B on the lower half side of the processing tank, and the former drive slurry shaft 3 is passed through the partitioning porous plate 7. At the same time, the larger diameter spherical body 2A of the first spherical body 2 is
The processing chamber 1A is filled with small-diameter spherical bodies 2B, and the second processing chamber 1B is separately filled with small-diameter spherical bodies 2B.

That is, raw material coarsely pulverized coal, water, and surfactant are mixed in advance at a predetermined mixing ratio such that the coal content is, for example, 70% (weight), and the mixture is introduced into the treatment tank 1 from the supply pipe 4. .

As the input mixture is passed through the processing chamber downward while extracting the product from the extraction pipe 5, first, in the first processing chamber 1A, the large particles in the early stage of the pulverization process are crushed by the large diameter spherical bodies 2A. The spherical bodies 2A are effectively pulverized by force, and in the second processing chamber 1B, the spherical bodies 2A are efficiently pulverized by frequent contact with the relatively small particle spherical bodies 2B in the latter stage of the pulverization process. , 2B, the passing mixture is pulverized and kneaded, and a highly concentrated coal-water slurry having a coal concentration of 70% is taken out from the extraction pipe 5 as a processed product.

[Another example]

Next, another embodiment of the present invention will be described.

As shown in FIG. 2, for the vertical treatment tank 1,
The supply path 4 is connected to the lower end side, and the take-out path 5 is connected to the upper end side, and accordingly, the first processing chamber 1A filled with the large diameter spherical bodies 2A is connected to the lower half of the processing tank 1,
and a second processing chamber 1B filled with small-diameter spherical bodies 2B.
are respectively formed in the upper half of the treatment tank 1, and a mixture of raw material coarsely pulverized coal and water is pressurized into the lower end of the treatment tank 1 by a pump 6', and the pressurized feed is subjected to upward treatment. It may be configured such that the press-in feed is sequentially pulverized and kneaded in the first and second embodiments 1A and 1B as it passes through the tank, and the coal water slurry as a treated product is extracted from the upper end side extraction passage 5.

The connection positions of the supply path 4 and the take-out path 5 to the vertical processing layer 1 may be such that both paths 4 and 5 are connected to mutually opposite sides in the vertical direction of the processing tank 1; Separation dimensions and processing tank 1
Various changes and improvements can be made to the specific connection positions for the first processing chamber 1A and the second processing chamber 1B.
The specific length ratio of the path through which the processed material passes through can also be changed as appropriate.

The diameter ratio and weight ratio of the large-diameter spherical body 2A and the small-diameter spherical body 2B can be changed as appropriate.

The drive screw shaft 3 may be installed separately in the first processing chamber 1A and the second processing chamber 1B.

The present invention has a vertical processing tank 1 divided into two processing chambers 1 and 1, upper and lower.
The processing chambers 1A and 1B are divided into large-diameter spherical bodies 2A and small-diameter spherical bodies 2B, respectively.As an application example, the vertical processing tank 1 is divided into three or more spherical bodies in the vertical direction. Each processing chamber is partitioned by a porous plate-like body 7 that allows only the passage of the pulverized material, and the spherical bodies 2 of different diameters are separated, the larger the diameter.
It is also conceivable to fill a plurality of processing chambers separately for each diameter while being located on the supply path 4 side.

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram showing an embodiment of the present invention;
FIG. 2 is a schematic structural diagram showing another embodiment of the present invention, and FIG. 3 is a schematic structural diagram showing a conventional example. 1... Vertical processing tank, 1A... First processing chamber, 1B
...Second processing chamber, 2... Spherical body, 2A... Large diameter spherical body, 2B... Small diameter spherical body, 4... Supply path, 5...
...Take-out route.

Claims (1)

[Claims for Utility Model Registration] A vertical processing tank 1 connected to a supply path 4 for coarsely pulverized raw coal and water, and a take-out path 5 for the pulverized product is provided with a large number of spherical particles for pulverizing the feed material. In the pulverizing apparatus for producing coal-water slurry, which is equipped with a driving screw shaft 3 for filling the spherical bodies 2 and stirring the spherical bodies 2, the supply passage 4 and the take-out passage 5 are provided in the vertical direction of the vertical treatment tank 1. and a porous plate-like body 7 connected to opposite sides of each other and allowing only passage of the pulverized material inside the vertical treatment tank 1.
, the first processing chamber 1 communicating with the supply path 4
A and a second processing chamber 1B communicating with the extraction passage 5, and a large diameter one 2A of the spherical bodies 2.
into the first processing chamber 1A, and a small diameter one 2
A pulverizer for producing coal water slurry, in which B is separately filled in the second processing chamber 1B. The pulverizing apparatus for producing coal-water slurry according to claim 1, wherein the slurry shaft 3 is arranged to penetrate the porous plate-like body 7.