JP2006118801A - Dust discharge port - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable easy dust discharge from a carbonization furnace or the like without stopping the operation of the furnace. <P>SOLUTION: A wall member 51 is disposed in an opening 151 disposed in the bottom wall 15 of the carbonization furnace for accumulating dust. A plurality of long-sized openings 511 with a constant width are disposed in parallel at a certain interval in the wall member 51, and sliding doors 52 having a plurality of long-sized openings 521 with substantially the same shape at the same interval as the shape interval of the openings 511 are disposed near the wall member 51 movably in parallel. The sliding doors 52 are moved regularly and reversely in the directions orthogonal to the openings 511 and 521, the openings 511 are opened by matching and communicating the openings 521 of the sliding doors 52 with the openings 511 of the wall member 51 by movement in one direction, and the openings 511 of the wall member 51 are blocked by the sliding doors 52 by shifting the openings 521 of the sliding doors 52 from the openings 511 by movement in the other direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a dust discharge port, and more particularly to a dust discharge port that can easily discharge dust from a combustion furnace such as a carbonization furnace.

In an externally heated rotary kiln type carbonization furnace, etc., the carbonization gas (exhaust gas) exhausted from the rotary cylinder to the heating chamber is introduced into the secondary combustion chamber, where it is burned and deodorized, and the flow rate is reduced to Dust contained in the exhaust gas is dropped and separated onto the bottom wall of the furnace body, and then flows out to the exhaust system. Therefore, dust separated from the exhaust gas accumulates on the bottom wall, and it is necessary to scrape the dust at a certain frequency. Patent Document 1 shows an example of the structure of a carbonization furnace provided with a secondary combustion chamber.
JP 2002-31483 A

  However, when scraping the dust on the bottom wall in the conventional carbonization furnace, the operation of the furnace is stopped and the temperature of the secondary combustion chamber is lowered sufficiently, and then the inspection port is opened and the dust accumulated in the secondary combustion chamber There was a problem that it was difficult to work.

  Therefore, the present invention solves such a problem, and an object of the present invention is to provide a dust discharge port capable of easily discharging dust from a carbonization furnace or the like without stopping the operation of the furnace.

  In order to achieve the above object, according to the first aspect of the present invention, a plurality of long openings (511) having a constant width are formed in parallel at regular intervals on the bottom wall (51) of the carbonization furnace in which dust accumulates, and the bottom wall is formed. A sliding door (52) having a plurality of substantially the same elongated openings (521) formed at the same interval as that of the elongated openings (511) so as to be movable parallel to (15, 51). The sliding door (52) is moved forward and backward in a direction orthogonal to the long openings (511, 521), and the opening (521) of the sliding door (52) is moved to one side of the bottom wall (51). The long opening (511) of the bottom wall (51) is opened in communication with the long opening (511), and the opening (521) of the sliding door (52) is moved to the other side by moving to the other side. The long opening (511) of the bottom wall (51) is shifted from the long opening (511) and the sliding door (5 ) So as to close in.

  In the first aspect of the present invention, when discharging dust accumulated on the bottom wall, the sliding door is moved by a certain amount so that the opening coincides with the long opening of the low wall, and both are communicated. Thereby, the long opening of the bottom wall is opened, and the dust accumulated on the bottom wall is dropped and discharged to a dust box etc. outside the furnace body provided below the sliding door through both openings. In the present invention, by providing the necessary number of openings in the bottom wall and the sliding door, if the sliding door is moved by a relatively small amount, the opening is opened and dust is quickly discharged. Therefore, the conventional dust scraping work is not required, and the work becomes easy, and it is not necessary to stop the furnace operation and lower the furnace temperature prior to the work.

  The said opening is not restricted to a long thing, The shape is not specifically limited. Also, it is not always necessary to provide a plurality of openings. Therefore, in the second aspect of the invention, an opening is formed in the bottom wall of the carbonization furnace where dust accumulates, and a sliding door having an opening substantially the same shape as the opening is provided to be movable parallel to the bottom wall. The opening of the sliding door is moved so as to be in communication with the opening of the bottom wall, or the opening of the sliding door is moved so as to deviate from the opening of the bottom wall, thereby opening and closing the opening of the bottom wall. Here, the movement of the sliding door is not limited to linear movement, and may be turning movement or the like.

  Furthermore, it is not necessarily a sliding door. Therefore, in the third aspect of the invention, an opening is formed in the bottom wall of the carbonization furnace in which dust accumulates, and an open / close door that opens and closes the opening is provided. With such a configuration, dust can be discharged out of the furnace simply by opening the open / close door, so that the conventional troublesome work becomes unnecessary.

  In addition, the code | symbol in the said parenthesis shows the correspondence with the specific means as described in embodiment mentioned later.

  As described above, according to the dust discharge port of the present invention, dust discharge from the carbonization furnace or the like can be easily performed without stopping the operation of the furnace.

  FIG. 1 shows an externally heated rotary kiln type carbonization furnace having a dust discharge port according to the present invention. In FIG. 1, a rotating cylinder 2 is provided through a furnace body 1 made of a heat-resistant material. The rotating cylinder 2 is rotatably supported by a ring 23 provided on the outer periphery of both end portions 21 and 22 located outside the furnace, and is supported by a roller (not shown). The chain to reach is connected and rotated. A screw conveyor 31 is inserted into the one end portion 21 of the rotating cylinder 2, whereby the dewatered sludge K in the hopper 32 is carried into the rotating cylinder 2. The other end 22 of the rotating cylinder 2 is inserted into the discharge cylinder 33, and discharge ports 221 are opened at a plurality of positions on the outer periphery of the other end 33. The rotating cylinder 2 is inclined slightly downward from the one end 21 toward the other end 22, and is used to penetrate the cylinder wall at an appropriate position so that dry distillation gas generated in the cylinder flows out of the cylinder. A plurality of discharge pipes 25 are provided.

 A partition wall 13 that extends horizontally from one end wall 11 of the furnace body 1 to the vicinity of the other end wall 12 of the furnace body 1 is provided below the rotary cylinder 2, with the upper side serving as the heating chamber H and the lower side serving as the secondary wall. It is a combustion chamber S. The heating chamber H and the secondary combustion chamber S communicate with each other through a flow opening 14 formed between the partition wall 13 and the end wall 12. Further, an auxiliary combustion burner 41 is provided on the furnace wall of the heating chamber H, and a secondary combustion burner 42 is provided on the furnace wall of the secondary combustion chamber S. Note that the secondary combustion chamber S has a volume that can sufficiently reduce the flow rate of the exhaust gas, as will be described later.

 The dewatered sludge K carried into the rotary cylinder 2 by the screw conveyor 31 is heated and dried while being conveyed in the rotary cylinder 2 from the one end 21 direction toward the other end 22 direction. It is heated and carbonized carbonized to form carbonized sludge and discharged from the discharge pipe 221. The rotating cylinder 2 is heated by the auxiliary burner 41 in the initial stage, and is generated by combustion after the dry distillation gas is generated. The combustion exhaust gas reaches the secondary combustion chamber S from the heating chamber H through the circulation opening 14, where unburned dry distillation gas in the exhaust gas is burned by the secondary combustion burner 42. At the same time, the flow rate of the exhaust gas is reduced in the secondary combustion chamber S, and the dust contained therein falls and accumulates on the bottom wall 15 of the furnace body 1. The exhaust gas is discharged from an exhaust port 111 provided in the end wall 11 of the furnace body 1 to the exhaust system.

 Here, in the present embodiment, a plurality of rectangular openings 151 (two openings are provided in FIG. 1 for ease of understanding) are formed so as to occupy most of the bottom wall 15, and each opening 151 is formed. Inside, a rectangular wall member 51 made of a heat-resistant material (for example, molded brick) constituting a part of the bottom wall 15 is fitted. As shown in FIG. 2, the wall member 51 has a substantially rectangular shape extending in the width direction of the furnace body 1 (perpendicular to the paper surface in FIG. 1). The wall surface 51 has a plurality of constant widths parallel to the longitudinal direction at regular intervals. The long opening 511 is formed. The length of the opening 511 is substantially the same as the width of the opening 151 of the bottom wall 15 (see FIG. 1).

 Under the wall member 51, a sliding door 52 made of a heat-resistant material (for example, a fire-resistant board) is disposed in the vicinity of the wall member 51. Both sides of the sliding door 52 are supported by L-shaped rails 61 (FIG. 1) projecting from the lower surface of the bottom wall 15, and are movable in the longitudinal direction in parallel to the wall member 51. The sliding door 52 is formed with a long opening 521 having the same shape and the same distance as the opening 511 of the wall member 51, and a handle 522 for moving the sliding door 52 (FIG. 2). ) Is provided. The sliding door 52 is positioned in a dust box 53 provided with an opening edge in contact with the bottom wall 15.

 In such a dust outlet structure, when the sliding door 52 is positioned directly below the wall member 51 (the state shown in FIG. 2), the openings 511 and 521 are displaced from each other as indicated by a chain line. Since it is in the position, the opening 511 is closed by the sliding door 52. When the dust accumulated on the bottom wall 15 is discharged, when the pulling door 52 is pulled forward by a certain amount with the handle 522, the opening 521 coincides with the opening 511 and the two communicate with each other (state in FIG. 1). The opening 511 is opened. Thereby, the dust accumulated on the bottom wall 15 is dropped and discharged into the dust box 53 through the openings 511 and 521. According to such a structure, by providing the required number of openings 511 and 521 in the wall member 51 and the sliding door 52, if the sliding door 52 is moved by a relatively small amount, the openings 511 and 521 communicate and open. The dust is quickly discharged from the openings 511 and 521. Therefore, the conventional dust scraping work is not required, and the work becomes easy, and it is not necessary to stop the furnace operation and lower the furnace temperature prior to the work.

1 is a schematic vertical sectional view of a carbonization furnace showing one embodiment of the present invention. It is a disassembled perspective view of a wall member and the sliding door which overlaps this.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Furnace body, 15 ... Bottom wall, 51 ... Wall member, 511 ... Long opening, 52 ... Sliding door, 521 ... Long opening.

Claims (3)

A plurality of long openings having a constant width are formed in parallel at regular intervals on the bottom wall of the carbonization furnace in which dust accumulates, and can be moved in parallel in the vicinity of the bottom wall so as to be the same as the formation interval of the long openings. The sliding door is provided with a plurality of substantially identical openings, and the sliding door is moved forward and backward in a direction perpendicular to the long opening, and the opening of the sliding door is moved to one side by the length of the bottom wall. The long opening of the bottom wall is opened by being in communication with the long opening, and the opening of the sliding door is shifted from the long opening of the bottom wall by moving to the other side, and the long opening of the bottom wall is closed by the pulling door. A dust outlet characterized by doing so. An opening is formed in the bottom wall of the carbonization furnace where dust accumulates, and a sliding door having an opening substantially the same shape as the opening is provided so as to be movable parallel to the bottom wall, and the opening of the sliding door is provided in the bottom wall The dust exhaust is characterized in that it is moved so as to coincide with the opening of the opening, or the opening of the sliding door is moved so as to deviate from the opening of the bottom wall to open and close the opening of the bottom wall. Exit. A dust discharge port characterized in that an opening is formed in the bottom wall of the carbonization furnace where dust accumulates, and an open / close door is provided to open and close the opening.

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