JPH0329305Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a powder discharge device for a vertical type cooling furnace for powder and granular materials that requires airtightness.

(Prior Art and its Problems) As a discharge device for a vertical cooling furnace for powder and granular materials that requires airtightness, there is, for example, a discharge device for discharging cooled coke from a vertical cooling furnace of a coke dry extinguishing equipment. In these facilities, inert cooling gas is circulated to perform blow-in heat exchange cooling, so it is dangerous if the cooled material leaks from the discharge device to the outside, and from an environmental perspective, it is important to maintain airtightness. There is a need.

Examples of such a discharge device include a gate valve type and a rotary valve type. The present invention relates to the airtightness of the discharge device using the former gate valve, and this discharge device has a gate valve 3 perpendicular to the discharge port 2 of the cooled coke 1 as shown in FIG.
The cylinder 4 is operated to open and close the valve and shut it off after discharge.However, when the tip of the gate valve 3 comes into contact with the wall 5 of the discharge port 2, the coke 1 narrows, and the gas inside the furnace leaks from the gap, resulting in airtightness. was not maintained.

As a technique for maintaining such airtightness, for example, as shown in Japanese Utility Model Application Publication No. 58-113741, there is a technique in which a bellows is arranged around the outer periphery of the discharge port and brought into contact with the cut-off valve. .

(Means for solving the problem) The means of the present invention is to make the contact wall of the tip of the gate valve provided at the powder discharge port at the bottom of the cooling tower concave, and to install the powder discharge ram in this concave portion. This is a discharge device for a vertical type cooling furnace for powder and granular materials.

(Function) That is, when the discharge gate valve is shut off, there is no wall with which the tip comes into contact, and a reservoir is provided for the powder and granular material to escape. However, the powder and granules in the reservoir accumulate and stick together, and eventually form a wall due to the force of the gate, trapping the powder and granules and losing airtightness. Powder is discharged using an extrusion device. Therefore, the powder at the tip of the gate valve escapes into the reservoir and does not become clogged.
Since the tip of the gate valve fits into the recess, the airtightness of the gas in the furnace is maintained.

(Example) An example in which this invention was implemented in a discharge device of a vertical cooling furnace of coke dry extinguishing equipment will be described based on the accompanying drawings.

As shown in FIG. 1, a hollow slit 6 is formed in the part of the wall 5 that the tip of the gate valve 3 comes into contact with, so that when the gate valve 3 is activated and the discharge port 2 is blocked, the tip of the gate valve 3 is closed. fits into the slit 6 to maintain airtightness. The coke 1 pushed at this time collects in the slit 6 and does not get caught. The coke 1 accumulated in this slit 6 is discharged by a discharge ram 7. Figure 2 shows the discharge ram 7 pushing out the coke 1 from the slit 6, showing the cylinder 4 of the gate valve 3 and the discharge ram 7.
The valve is connected to the cylinder 8 so that the gas is discharged when the gate valve 3 is in the open direction. The operation of the discharge ram 7 may be linked in this manner, or the discharge may be performed periodically.

In this way, in this example, the gas inside the furnace was prevented from leaking due to clogging, clogging, etc. of the coke 1, and the airtightness inside the furnace could be maintained.

In this embodiment, a vertical cooling furnace of coke dry extinguishing equipment was used, but it is of course applicable to a vertical cooling furnace for sensible heat recovery of sintered ore, for example.

(Effects of the invention) As described above, according to the present invention, gas leakage from the discharge device in a powder cooling furnace can be prevented and airtightness within the furnace can be maintained, resulting in excellent operational effects of the powder cooling furnace. have

[Brief explanation of drawings]

FIGS. 1 and 2 are side cross-sectional views of the device of the present invention in the embodiment, and FIG. 3 is a side cross-sectional view of an example of the conventional device. 1... Coke, 2... Discharge port, 3... Gate valve,
4, 8...Cylinder, 5...Discharge port wall, 6...Slit, 7...Discharge ram.

Claims (1)

[Scope of utility model registration request] Discharge of a vertical cooling furnace for powder and granular materials, in which the wall that the tip of the gate valve that is provided at the powder discharge port at the bottom of the cooling tower comes into contact with is formed into a slit, and a powder and granular material discharge ram is provided within the slit. Device.