JPS6215758Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a raw material dispersion supply device attached to a raw material input portion of a multistage furnace used for firing powdery raw materials such as briquette coal.

(Prior art) When dry distilling or activating (hereinafter referred to as calcination) briquette charcoal, etc. using a multi-stage furnace, in order to allow sufficient calcination time, the charcoal is not directly distributed and supplied to the entire hearth of the uppermost stage of the furnace. It is desirable to supply it to a specific location and then disperse it over the entire hearth over time using stirring teeth on an arm or the like. Conventionally, when feeding raw materials to the hearth of a multi-stage furnace, as shown in FIG. Raw materials to be fired were intensively put onto the hearth 7 at the top. In such a case, since the raw materials are piled up high in that part (see the mesh part in Figures 1 and 2), the stirring tooth B on the arm will continue to
As a result, the raw materials inside the highly stacked areas are not sufficiently fired because they are difficult to come into contact with the hot air, and as shown in Figure 2, the raw materials are spread over the hearth with uneven thickness. cannot be dispersed, and the effective utilization rate of the hearth decreases.
The degree of calcination of each raw material (briquette pellets) varies, resulting in a decrease in product yield. The above drawbacks can be improved to some extent by increasing the number of input ports, but this is not sufficient, and in this case, problems such as the structure of the raw material distributing device becomes complicated and failures increase.

(Purpose of the invention) The present invention was made in view of the above problems, and attempts to solve the above problems by providing the following dispersion feeding device at the raw material input port.

(Structure and operation of the invention) That is, the present distributed feeding device has an annular input port above the uppermost hearth, a discharge port facing the center of the hearth at the bottom, and A passage body having an annular inclined passage formed therein so as to converge at the discharge port is disposed on the rotating shaft of the multi-stage furnace, and the passage body is configured to rotate with the rotation of the rotating shaft. The structure is such that it can be distributed and supplied to the center of the hearth (around the rotating shaft) so that it has an even thickness.

Hereinafter, the present invention will be described in more detail with reference to the drawings regarding an embodiment in which pellets of briquette coal are distributed and supplied as a raw material.

FIG. 3 is a side sectional view of a distributed feeding device according to an embodiment of the present invention, and FIG. 4 is a partial side sectional view of a multistage furnace when the distributed feeding device of FIG. 3 is attached to the multistage furnace. . In the figure, reference numeral 1 denotes a dispersion feeding device according to an embodiment of the present invention, which includes an outer cylinder 2, an input port 3, a discharge port 4, and a raw material to an upper input port 3.
It is composed of a spiral chute 5 that smoothly guides the raw material to the discharge port 4, and a skirt 8 that prevents raw materials and the like from entering the gap between the rotating shaft 6 and the hearth 7.
That is, in this embodiment, the outer cylinder 2 is fixed to the rotary shaft 6 of the furnace through the spiral chute 5 on the outer periphery of the rotary shaft 6 and through the skirt 8 at the lower end. The upper end of the outer cylinder 2, the rotating shaft 6, and the spiral chute 5 form an annular input port 3 that opens upward, and the spiral A discharge port 4 is formed by providing a continuous opening at the lower end of the chute 5, and a part of the outer cylinder 2 and the spiral chute 5
By forming a passage with the rotation shaft 6 and connecting the input port 3 and the discharge port 4, a passage body is formed as a whole, and as a result, the passage body is disposed on the rotation shaft, and the rotation It is configured to rotate with the axis.

Thus, the present dispersion feeding device having the above-mentioned structure operates as follows when dispersing and feeding pellets of briquette coal (hereinafter referred to as pellets) as a raw material onto the hearth. That is, when pellets are introduced from the raw material input chute A fixed to the furnace into the input port 3 at the upper end of the dispersion feeder 1 which rotates together with the rotary shaft 6, the pellets are deposited on the slope of the spiral chute 5. As the device rotates, it is evenly distributed and supplied from the discharge port 4 to the circumference of the rotating shaft 6 (skirt 8) on the hearth 7. Therefore, when the pellets are spread on the hearth by the stirring teeth B, they can be stacked to an even thickness and stirred uniformly, so that each pellet and its surface come into contact with the hot air uniformly and are baked uniformly. Become. Further, by providing the above-mentioned chute, the impact on the raw material pellets can be reduced compared to the conventional case where the pellets are directly thrown onto the hearth, so the pellets are not crushed. If it is necessary to further reduce the impact, the chute may be provided multiple times as shown in FIGS. 5 and 6, and the maximum fall distance (height) h may be made smaller than the head H.

Further, as shown in FIG. 7, the above-mentioned dispersion supply device may be configured with a chute 5' (straight chute) simply having a straight line inclination instead of the spiral chute 5, and furthermore, although not shown in the figure, In FIG. 7, the outer tube 2 may be shortened and a pipe may be directly attached to the lower end of the input port 3 to form the passage and the discharge port 4. It should be noted that this device can be installed not only at the above-mentioned feeding section but also between each hearth of a multi-stage furnace as shown in FIG. 4, and the same effects as described above can be obtained.

(Effects of the invention) If the above device according to the invention is attached above the hearth, the raw materials can be evenly distributed over the hearth due to the action of the stirring teeth, thereby increasing the effective utilization rate of the hearth. At the same time, each raw material and its surface are baked by contacting the hot air uniformly, and crushing due to falling at the input port etc. can be prevented.
Product yield increases dramatically.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the structure of the charging part of a conventional multi-stage furnace, Fig. 2 is a plan view taken along line X-X in Fig. 1,
Fig. 3 is a side sectional view of an embodiment of the device according to the present invention, Fig. 4 is a partial side sectional view of a multi-stage furnace equipped with this device, and Figs. 5 and 6 are other embodiments having multiple chute. A side sectional view and a developed view showing an example, and FIG. 7 is a side sectional view showing another embodiment. A... Input chute, B... Stirring tooth, C... Distribution device, 1... Dispersion device, 2... Outer cylinder, 3... Input port, 4... Outlet port, 5... Spiral chute, 5 '...Linear chute, 6...Rotary axis, 7...
...Hearth, 8...Skirt.

Claims (1)

[Scope of utility model registration request] A passage body having an annular input port at the top, a discharge port facing the center of the hearth at the bottom, and an inclined passage inside the ring so as to gather from the input port to the discharge port is used in a multi-stage furnace. 1. A raw material dispersion and supply device, characterized in that the device is disposed on a rotating shaft and configured to rotate the passage body along with the rotation of the rotating shaft.