JPH0323306Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a pulverizer for pulverizing grasses, residual culms, etc., and particularly relates to an improvement of a pulverizing die in a pan mill type pulverizer.

[Conventional technology]

As shown in FIG. 4, a vertical cylindrical casing 1, a die 2 supported horizontally within the casing and having a pulverized material passage hole 3 of a predetermined size, and a pulverizer that rolls on the die 2. For example, a pan mill-type crusher consisting of rollers 4 is known as
This method is known from Japanese Patent Application Laid-open No. 58-31189, etc. This type of crusher can crush the material by rolling the crushing roller 4, regardless of the moisture content of the material, and regardless of whether it is dry or wet, and can be used in a wide range of applications. .

However, as the moisture content of the material increases, the grinding roller 4 becomes more likely to slip, resulting in disadvantages such as a reduction in the throughput in terms of dry matter compared to dry material. For this purpose, as shown in FIG. 4, unevenness 5 is provided on the rolling surface of the crushing roller 4, a stirring rod 6 is provided on the outer surface of the crushing roller 4, and a plow 7 is provided on the rotating inside of the crushing roller 4. Furthermore, improvements have been made to the inner peripheral surface of the casing 1. Also, die 2
In this case, as shown in FIGS. 5a and 5b, crushed material passing holes 3 of a certain size are formed so as to expand spirally toward the outer circumferential side with respect to the rolling direction of the crushing roller 4, or In addition, as shown in Fig. 6a and b, the processing capacity is improved by drilling the pulverized material passing holes 3 concentrically and changing the arrangement of the pulverized material passing holes 3. .

[The problem that the idea aims to solve]

However, even with the above-mentioned improvements, the improvement in processing capacity is only 20 to 30%, and there is still the problem that the grinding roller 4 easily slips when handling high-moisture materials, making it a challenge to significantly improve the grinding capacity. remains as.

[Means to solve the problem]

Therefore, in the present invention, unlike the conventional crushing die 2, the crushing material passing hole 3 of a certain size is formed on the crushing roller 4.
In addition, a large number of auxiliary passage holes 8 smaller than the passage holes 3 are formed in the gaps between these holes 3 so as to expand spirally toward the outer circumferential side with respect to the rolling direction of the holes 3. It is characterized by being opened.

[Effect]

By configuring as described above, the crusher of the present invention has less slip on the crushing roller 4.
This can dramatically improve processing capacity.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3.

The die 2 shown in FIGS. 1a and 1b has pulverized material passage holes 3 similar to the conventional die 2 shown in FIGS. A large number of auxiliary passage holes 8, 8, . . . smaller than the hole 3 are bored. Further, the crushed material passing hole 3 and the auxiliary passing hole 8 are provided corresponding to the passing surface of the crushing roller 4, the passing hole 3 is bored with the maximum opening ratio, and the auxiliary passing hole 8 is provided in correspondence with the passing surface of the crushing roller 4. This is a hole drilled in the gap with the maximum aperture ratio.

Further, although the auxiliary passage hole 8 has a circular planar shape in FIG. 1, the shape of the hole is not particularly limited, and may be triangular, square, etc. Further, the shapes of the pulverized material passage hole 3 and the auxiliary passage hole 8 may be combined in any manner.

The die 2 and the crushing roller 4 may have a flat surface as shown in FIG. 1 and FIGS. 4 to 6, but as shown in FIG. A die 2a having an inclined surface with a material passing hole 3a and a conical roller 4a may be combined, and as shown in FIG.
A die 2b with a step and a crushing roller 4b with a step may be combined.

In such a configuration, a large number of auxiliary passage holes 8 are bored in the rolling passage surface of the crushing roller 4 of the die 2 along with the crushed material passage hole 3, and there is almost no flat part on the surface, and the crushing roller 4 The pulverized material is forced into these holes 3 and 8. Therefore, it is possible to prevent the crushing roller 4 from slipping, which is mainly caused by crushed materials accumulated on the die 2.
Throughput can be significantly improved.

Next, an experimental example using sweet sorghum as a material will be explained.

Sweet sorghum is not only used as it is as roughage, but in recent years the technology of dehydrating it and using it for ethanol fermentation to produce juice, and the use of cake as silage, has received a lot of attention in recent years. When this was shredded to a cutting length of 36 mm and fed to a crusher to be crushed, the conventional die 2 shown in Figure 5 had a limit of 0.7 t/h, but the die 2 shown in Figure 1 had a limit of 0.7 t/h. A processing capacity of 2.0t/h was obtained. In addition, when the material is shredded into 9mm pieces and supplied, the former is 1.0t/h, while the latter is
It achieved a processing capacity of 3.0t/h, an increase of approximately three times.

Furthermore, when the materials crushed by these dies 2 were dehydrated under certain conditions, the dehydration rate was 52% regardless of the presence or absence of the auxiliary passage hole 8 of the die 2.
It was hot. This proves that even if the processing capacity is dramatically improved by providing the auxiliary passage holes 8, the degree of pulverization remains almost the same.

In addition, the power consumption during 2.0 to 3.0t/h processing as mentioned above is around 7KW, and the power consumption during wet grinding using other methods (conventional) is around 3.0t/h.
It has also been proven that the energy consumption is low, although it is said to be 15 to 30KW.

[Effect of idea]

As explained above, according to the pulverizer of the present invention, the pulverized material passing holes are formed in the pulverizing roller rolling passing surface of the die, and the pulverized material passing holes are formed in the pulverizing roller rolling passage surface of the die, and the pulverized material passing holes extend spirally toward the outer circumferential side with respect to the rolling direction of the pulverizing roller at the maximum opening ratio. , Since a large number of auxiliary passing holes smaller than the passing holes are drilled between the passing holes, the crushed material crushed by the crushing roller is pushed into the passing hole and the auxiliary passing hole without accumulating on the die, and the crushing roller slips. It dramatically improves the pulverization capacity without causing any damage, and is comparable to conventional dies in terms of pulverization particle size.

In addition, the power consumption and energy consumption are also reduced compared to conventional ones.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the die according to the invention, a
1 is a plan view of the die, b is a sectional view of a, FIGS. 2 and 3 are partial longitudinal sectional side views of a pulverizer showing an embodiment of the combination of a die and a pulverizing roller, and FIG. 4 is a pulverizer showing a conventional example. FIGS. 5 and 6 show conventional examples of the die, in which a is a plan view and b is a sectional view of a. 1...Casing, 2...Die, 3...Crushed material passing hole, 4...Crushing roller, 8...Auxiliary passing hole.

Claims (1)

[Claims for Utility Model Registration] A pulverizer comprising a vertical cylindrical casing, a die supported horizontally within the casing, and a pulverizing roller rolling on the die, the die having a pulverizing roller passing through the die. A large number of crushed material passage holes with a predetermined size on the surface with the maximum opening ratio,
The holes are formed so as to expand spirally toward the outer periphery in the rolling direction of the crushing roller, and a large number of auxiliary passing holes smaller than the passing holes are drilled in the gaps between these passing holes. Characteristic crusher.