JP2013181098A - Water sealing device, and dust discharge method - Google Patents

Abstract

A water sealing device and a dust discharging method capable of easily removing dust in an annular ridge with a simple configuration.
An annular ridge 13 is provided on the upper peripheral edge of a container 12 having a lid portion 11, and a peripheral lower portion 15 of the lid portion 11 is submerged in seal water 14 supplied thereto, so that the gas in the container 12 is discharged to the outside. The water sealing device 10 and the dust discharge method are cut off from the gas, and while the sealing water 14 is discharged from the water discharging pipe 16 to the annular ridge 13, the gas is injected from the gas injection pipe 17 to the annular ridge 13. The seal water 14 is discharged to change the level of the seal water 14 in the annular trough 13 up and down to form a flow of the seal water 14 toward the drain port 19, and the dust 18 accumulated by gas injection is collapsed, The dust 18 is discharged from the drain port 19.
[Selection] Figure 1

Description

  The present invention relates to a water sealing device and a dust discharging method for removing accumulated dust in an annular tub to which sealing water is supplied in order to shut off gas in a container from the outside.

Conventionally, a coke dry digestion facility 80 shown in FIG. 5 has been used as a facility for cooling sensible heat of red hot coke extruded from a coke oven (hereinafter also simply referred to as coke) while cooling the red hot coke. This coke dry digestion facility 80 has a chamber 82 having a coke charging inlet 81 at the top of the tower, an annular ridge 83 is provided at the periphery of the coke charging inlet 81, and in the seal water 84 supplied into the annular ridge 83. Intrusion of air into the chamber 82 is prevented by submerging the lower peripheral edge of the charging lid 85 that closes the coke charging inlet 81.
In use, when the coke 86 is charged into the chamber 82, the bucket 87 is lifted above the chamber 82, and then the charging lid 85 is lifted, and a charging device connected to the charging lid 85 (coke A guideway 88 at the time of entry is set in the upper part of the chamber 82. Thereafter, the bottom plate 89 installed in the bucket 87 and the top plate 90 installed in the charging device 88 are opened, and the coke 86 in the bucket 87 is charged into the chamber 82.

At this time, however, the dust blown up from the inside of the chamber 82 accumulates in the annular bowl 83 provided in the chamber 82, and therefore, when the coke charging inlet 81 is closed again with the charging lid 85, The loading lid 85 is lifted by contact with the lower peripheral edge of the loading lid 85. For this reason, the lower peripheral edge of the charging lid 85 cannot be submerged in the sealing water 84 supplied into the annular rod 83, and the gas in the chamber 82 may leak to the outside.
Therefore, for example, in Patent Document 1, air bubbles ejected from an air pipe disposed in an annular trough (water-sealed trough) are passed between the charging lid (furnace lid) and the inner wall of the annular trough. , A method of feeding the inside of a chamber (cooling tower) is disclosed. As a result, the air blown from the air pipe becomes bubbles and rises in the annular ridge, and exhibits the action of stirring the sealing water (sealing water). Dust is discharged together with sealing water from the inside of the annular ridge to the outside.

JP-A 64-14295

However, in the method described in Patent Document 1 described above, the air accumulated in the sealing water cannot be sufficiently agitated and suspended by the air blown into the seal water, and for example, the dust is suspended. Even if it was possible, there was no big flow in the seal water to the drainage port provided in the ring pit, and the dust removal ability was low.
For this reason, for example, an operator has to periodically remove dust in the annular basket, and workability is poor.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a water sealing device and a dust discharge method that can easily remove dust in an annular ridge with a simple configuration.

The gist of the present invention made to solve the above problems is as follows.
(1): An annular ridge is provided on the upper peripheral edge of the container having a lid portion, and the lower peripheral edge of the lid portion is submerged in the sealing water supplied to the annular ridge to block the gas in the container from the outside. In the water seal device,
In order to discharge the dust accumulated in the annular trough from a drain outlet provided in the annular trough, a water discharge pipe for discharging water that fluctuates the seal water level in the annular trough, and the accumulated dust And a gas injection pipe for injecting gas in the direction of the drainage port.

(2): The gas injection pipe is disposed on the outer peripheral edge of the annular rod, and the injection port of the gas injection pipe is submerged in the seal water, and the axis of the injection port is directed obliquely downward. The water sealing device according to (1), wherein the gas is injected between a lower end of a peripheral edge of the lid and a bottom surface of the annular ridge.

(3) The water seal device according to (1) or (2), which is provided at a coke charging inlet of a coke dry digestion facility.

(4): The dust discharge method for the water seal device according to any one of (1) to (3), wherein the gas injection is performed while the seal water is discharged to the annular trough by the water discharge pipe. The flow of the sealing water toward the drain outlet is formed by changing the water level of the sealing water in the annular jar up and down by discharging the sealing water by performing the gas injection to the annular ridge by the piping for use. In addition, the dust accumulated in the gas jet is collapsed, and the dust is discharged from the drain port.

The water sealing device and the dust discharging method according to the present invention are the discharge of the sealing water by the water discharging pipe, and the flow of the sealing water toward the drain outlet is formed by changing the water level of the sealing water in the annular trough up and down, Since the accumulated dust is destroyed by the gas injection by the gas injection pipe, the dust accumulated in the annular ridge can surely flow toward the drain outlet.
Therefore, the dust in the annular ridge can be easily removed with a simple configuration.

In addition, when the gas injection pipe is arranged at the upper part of the outer periphery of the annular ridge and the injection port of the gas injection pipe is submerged in the seal water, the gas injected from the gas injection pipe is directed toward the dust in the seal water. Therefore, it is possible to suppress and further prevent the seal water from splashing from the annular trough to the outside.
Here, since the axis of the injection port is directed obliquely downward and the gas is injected between the lower end of the peripheral edge of the lid portion and the bottom surface of the annular ridge, the dust accumulated on the radially inner side of the lid portion is collapsed, More dust inside can be discharged from the annular trough through the drain.

  Further, when the water sealing device is provided at the coke inlet of the coke dry digestion facility, for example, the dust removal operation in the annular bowl that has been regularly performed by an operator can be automated. Become good.

(A)-(D) are the partial sectional side views of the water sealing apparatus which concerns on one embodiment of this invention, explanatory drawing which shows the state which planarly viewed the water sealing apparatus, and the water discharge piping of the water sealing apparatus, respectively. It is explanatory drawing and explanatory drawing of piping for gas injection of the water sealing apparatus. (A), (B) is explanatory drawing of the use condition of the water discharge piping and gas injection piping of the water sealing apparatus, respectively. (A)-(C) are explanatory drawings of the dust discharge | emission method of the water seal apparatus which concerns on one embodiment of this invention. It is the graph which showed the influence which the water discharge amount from the water discharge piping and the installation position of the gas injection piping exert on dust removal. It is explanatory drawing which shows the conventional use condition of a coke dry-digestion equipment.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 (A) to (D), a water seal device 10 according to an embodiment of the present invention is provided with an annular ridge 13 on the upper peripheral edge of a container 12 having a lid portion 11. 13 is a device for submerging the lower peripheral edge 15 of the lid portion 11 in the seal water 14 supplied to the vessel 13, and shuts off the gas in the container 12 from the outside. , Which is also simply referred to as gas piping). In the present embodiment, since the water sealing device 10 is provided at the coke charging inlet of the coke dry digestion facility, the container 12 corresponds to the chamber 82 and the lid 11 corresponds to the charging lid 85 (FIG. 5).
This will be described in detail below.

As shown in FIGS. 1 (A) to 1 (C) and FIG. 2 (A), the water discharge pipe 16 is a drain outlet provided in the annular ridge 13 together with the dust 18 accumulated in the annular ridge 13. In order to discharge from 19, water discharge is performed in which the water level of the sealing water 14 in the annular trough 13 fluctuates up and down.
The number of installed water discharge pipes 16 is two at a position facing the drain outlet 19 with the axial center of the annular trough 13 as the center, and a gap is provided from the two water discharge pipes 16 to the drain outlet 19 side. One by one, for a total of four. Thereby, the accumulated dust 18 can be made to flow to the drain outlet 19 side over substantially the entire circumference of the annular ridge 13.
The number of water discharge pipes 16 to be installed is not limited to this, and may be set to one or a plurality of two or more according to the scale of the circular trough. Further, the installation position is not limited to this, and may be set in consideration of a place where dust easily accumulates, for example. Furthermore, although the drain outlet 19 was provided in the lower part of the outer peripheral side wall of the annular trough 13, you may provide in the bottom face of not only this but an annular trough.

Each water discharge pipe 16 is disposed above the annular ridge 13 so that the water supply port 20 provided on the front side thereof does not contact the water surface of the seal water 14 in the annular ridge 13, and the water supply port 20 is a flat surface. It is arranged at a position where it does not overlap with the lid 11 as viewed (the outer peripheral side of the annular flange 13).
Each of the water discharge pipes 16 is connected at its base to a water supply pipe (not shown), and a water supply opening / closing valve provided in the water supply pipe starts and stops water supply into the annular trough 13, Has a configuration capable of controlling the flow rate (for example, about 5 to 10 m ³ / hour, about 1.5 m / second or more in flow rate).
Thereby, the water supply from each water discharge pipe 16 can be started or stopped almost simultaneously, but each water discharge pipe 16 is provided with a water supply on / off valve, and each water discharge pipe 16 It is also possible to individually start and stop water supply into the annular trough 13 and control the flow rate.

The water seal device 10 includes a seal water supply pipe (not shown) for supplying seal water 14 for normal use into the annular ridge 13 and a seal water drain port for discharging the seal water in the annular ridge 13 to the outside. (Not shown) is provided.
As a result, the seal water is always supplied from the seal water supply pipe into the annular ridge 13, and the supplied excess seal water overflows from the seal water drain port, so that the seal in the annular ridge 13 is provided. The water surface level is always kept constant, and the lid 11 is securely sealed with water. Note that the flow rate of the sealing water supplied from the sealing water supply pipe is, for example, so that the sealing can be reliably performed even when the sealing water is heated and evaporated by heat from the inside of the container 12. It is controlled to about 5 m ³ / hour or less, and is smaller than the total water supply flow rate (supply flow rate) from each of the water discharge pipes 16 described above (the total water supply flow rate from the water discharge pipes 16 is more) .

Further, a drain pipe 21 is connected to a drain port 19 for draining the sealing water 14 in the annular trough 13, and the drainage on-off valve 22 provided in the drain pipe 21 discharges the seal water 14. It is configured to be able to start and stop and further control the flow rate.
In addition, the drainage capacity of the sealing water 14 by the drain port 19 is made larger than the water supply capacity by the total water discharge pipe 16 (for example, about 1.5 times or more).
The control of the water supply on / off valve and the drain on / off valve 22 is performed by a control means (for example, a computer). The sealing water supply pipe is also provided with an opening / closing valve, and the flow rate can be controlled by the control means.

When removing the dust 18 accumulated in the annular trough 13 by the water discharge pipes 16, the control means opens and closes the water supply opening / closing valve to discharge water from the water discharge pipes 16 and open / close the drainage. The valve 22 is opened and closed to drain from the annular trough 13. As described above, the water discharge from each water discharge pipe 16 is performed only intermittently when the accumulated dust 18 is removed, and the seal water is continuously supplied like the above-described seal water supply pipe. It's not something
As a result, the water level of the sealing water 14 in the annular ridge 13 is changed up and down to form a flow of the sealing water 14 toward the drain port 19, and as shown in FIG. Dust 18 accumulated on the side (region not covered by the lid 11, that is, outside the lid 11) is caused to flow to the drain port 19.

As shown in FIGS. 1A, 1 </ b> B, 1 </ b> D, and 2 </ b> B, the gas injection pipe 17 collapses dust 18 accumulated in the annular ridge 13 and floats in the seal water 14. Therefore, gas (in this case, air) is jetted in the direction of the dust 18 accumulated in the annular ridge 13 and the direction of the drain port 19.
The number of installed gas pipes 17 is eight at the same angle (equal pitch) with the axis of the annular flange 13 as the center. Thereby, it is possible to inject the gas to the accumulated dust 18 over the substantially entire circumference of the annular trough 13 and cause the collapsed dust 18 to be sent out to the drain outlet 19 side.
Note that the number of gas pipes 17 to be installed is not limited to this, and may be set to one or more than two according to the scale of the circular rod. Further, the installation position is not limited to this, and can be set at random considering, for example, a place where dust easily accumulates.

Each of the gas pipes 17 is connected at its base to a gas supply pipe (not shown), and a gas supply pressure (for example, a pump) provided upstream of the gas supply pipe is used to adjust the gas supply pressure. It is the structure which can control (for example, about 0.01 MPa or more).
Thereby, the gas supply pressure to each gas pipe 17 can be controlled to substantially the same pressure, but each gas pipe 17 is provided with a gas supply source, and the gas supply pressure to each gas pipe 17 is individually set. It can also be controlled.
The control of the gas supply source is performed by the control means described above.

When the gas pipes 17 are installed on the ring rod 13, the gas pipes 17 are disposed on the outer peripheral upper part 23 of the ring rod 13, and the injection port 24 of the gas pipe 17 is submerged in the seal water 14. In addition, it is preferable that the axis of the injection port 24 be directed obliquely downward.
Specifically, as shown in FIG. 1B, the axial center of the gas pipe 17 is within a range (θ1) of 40 degrees or more and 55 degrees or less with respect to the tangential direction L of the annular flange 13 in plan view. Further, as shown in FIG. 1 (D), it is inclined downward (θ2) within a range of 55 degrees or less (preferably 40 degrees or more) downward from the horizontal direction.

When removing the dust 18 accumulated in the annular ridge 13 by the gas pipes 17, the gas supply source is driven by the control means to inject the gas from the gas pipes 17. In addition, it is preferable to perform the injection of the gas by each gas pipe 17 continuously (always) regardless of the timing of removing the dust 18.
As a result, as shown in FIG. 2 (B), gas is injected between the lower edge 25 of the lid 11 and the bottom surface 26 of the annular flange 13 to cover the inner peripheral side (covered by the lid 11) of the annular flange 13. The dust 18 accumulated in the broken area, that is, in the lid portion 11) is collapsed and flows to the drain outlet 19 side.

Then, the dust discharge method of the water seal apparatus which concerns on one embodiment of this invention is demonstrated, referring FIGS. 1-3.
When the container 12 is used, since the dust 18 is accumulated in the annular ridge 13, for example, the removal of the dust 18 is started before the sealing performance by the sealing water 14 is deteriorated. Note that the timing (frequency) of starting the removal of the dust 18 can be set as appropriate based on the past dust 18 deposition state (deposition rate).

First, with the drain on-off valve 22 kept closed, the water supply on-off valve is opened, and water is supplied from each water discharge pipe 16 into the annular trough 13 (water discharge). The supply of the seal water 14 from the seal water supply pipe into the annular trough 13 and the drainage of the seal water 14 from the seal water drain port are always performed without stopping, but can also be stopped. .
At this time, the injection of gas from the gas pipe 17 is continuously performed.
Thereby, the water level of the sealing water 14 in the annular trough 13 is temporarily raised from the normal level shown in FIG. 3 (A) to the level shown in FIG. 3 (B).

Next, within a range where the sealing water 14 in the annular ridge 13 does not overflow from the annular ridge 13, the drainage on-off valve 22 is opened, and drainage of the sealing water 14 from within the annular ridge 13 is started.
Here, since the drainage capacity of the seal water 14 by the drain port 19 is adjusted to be larger than the water supply capacity by the total water discharge pipe 16 as described above, the water level of the seal water 14 in the annular trough 13 is shown in FIG. The level can be lowered from the level shown in (B) to the level shown in FIG. At this time, the water supply flow rate through the total water discharge pipe 16 may be decreased from the time of the start of water supply (when the level of the seal water 14 in the annular trough 13 is increased).

Thus, after the water level of the seal water 14 in the annular ridge 13 is lowered, the drainage flow rate of the seal water 14 in the annular ridge 13 is controlled by the drainage on-off valve 22 so that the lower peripheral edge 15 of the lid portion 11 Then, drainage is performed within a range in which the submerged state in the sealing water 14 in the annular ridge 13 can be maintained (for example, continued for about 25 to 35 seconds). Note that the level of the sealing water 14 in the annular trough 13 may be adjusted by controlling the water supply flow rate through the total water discharge pipe 16 without controlling the drainage flow rate through the drainage on-off valve 22.
As described above, the flow rate of the seal water 14 toward the drain port 19 is fast over the entire circumferential direction in the annular ridge 13 by changing the level of the seal water 14 in the annular ridge 13 up and down. A flow is formed.

As described above, the vertical fluctuation of the level of the seal water 14 in the annular trough 13 may be performed once at the time when the dust 18 is removed, but may be performed a plurality of times. As this method, the water level of the sealing water 14 in the annular trough 13 is repeatedly changed up and down repeatedly by increasing / decreasing the water supply flow rate by the total water discharge pipe 16 and increasing / decreasing the drainage flow rate by the drainage on-off valve 22. There is.
Thereby, the dust 18 accumulated on the outer peripheral side in the annular ridge 13 flows out toward the drain port 19 and is discharged from the annular ridge 13 (see FIG. 2A).

Further, at this time, the dust 18 accumulated on the inner peripheral side of the annular ridge 13 is collapsed by the gas injected from the gas pipe 17, and the collapsed dust 18 flows into the drain port 19. Thus, the liquid flows out toward the drain port 19 and is discharged from the annular trough 13 (see FIG. 2B).
As described above, after the dust 18 accumulated in the annular trough 13 is discharged from the drain port 19, the drain on-off valve 22 is closed, and the drainage of the sealing water 14 from the annular trough 13 is stopped. And after raising the water level of the seal water 14 in the annular trough 13 to the level shown in FIG. 3 (A), the water supply on / off valve is closed and the water discharge pipes 16 are fed into the annular trough 13. Stop water supply.

Here, the result which showed the influence which the water discharge amount from the water discharge pipe and the installation position of the gas injection pipe have on the dust removal will be described with reference to FIG.
In addition, the water sealing apparatus shown to FIG. 1 (B) was used for the test done in FIG.
Moreover, in FIG. 4, the water supply flow rate from each water discharge pipe was set to 5 m ³ / hour and 7 m ³ / hour, and the influence of the inclination angle θ1 of the gas injection pipe on the amount of accumulated dust was examined. The amount of dust deposited was 100% by mass when the dust was not removed.

As shown in FIG. 4, the total water supply flow rate from each discharge pipe is increased from 5 m ³ / hour (marked with ◆ in FIG. 4) to 7 m ³ / hour (marked with ■ in FIG. 4). It was found that the deposition amount of can be reduced by 30% by mass or more.
If the total water supply flow rate from each water discharge pipe is excessively increased, seal water may leak from the annular trough, and for example, the side wall of the container may be corroded. It is preferable to reduce the total water supply flow rate.

Further, it was found that the amount of dust accumulation can be particularly reduced when the inclination angle θ1 of the gas injection pipe is within the range of 40 degrees to 55 degrees. When the inclination angle θ1 is less than 40 degrees, the effect of inclining the gas injection pipe is reduced. On the other hand, when the inclination angle θ1 exceeds 55 degrees, the effect of sending the collapsed dust to the drain outlet side is reduced. .
Here, if the inclination angle θ2 of the gas injection pipe exceeds 55 degrees, the gas cannot be injected toward the accumulated dust (the dust cannot be collapsed), and the injected gas collides with the bottom surface of the annular ridge. Since the sealing water sometimes leaked from the annular trough, it was set within the range of 55 degrees or less. Further, when the inclination angle θ2 of the gas injection pipe was less than 40 degrees, the jetted gas sometimes collided with the lower peripheral edge 15 of the lid portion 11, and thus was set to 40 degrees or more. However, the inclination angle θ2 varies depending on the depth of the annular flange 13 and the length of the peripheral lower portion 15.

From the above, the total water supply flow rate from each water discharge pipe is preferably set, for example, within a range of 5 to 10 m ³ / hour or less, and the inclination angle θ1 of the gas injection pipe is 40 degrees or more and 55. Within the range of degrees or less, the inclination angle θ2 is preferably set within the range of 40 degrees to 55 degrees.
Note that the setting angle of the inclination angle θ1 of the above-described injection pipe is a range that can be applied even in the case of an annular rod of various scales, for example, variously set within the above range according to the scale of the annular rod, etc. it can. On the other hand, the inclination angle θ2 of the injection pipe varies depending on the height of the side wall of the annular flange and the position in the height direction of the lower peripheral edge of the lid.

Thus, after removing the dust 18 accumulated in the annular trough 13 and stopping the water supply from each water discharge pipe 16 into the annular trough 13, the seal from the seal water supply pipe into the annular trough 13 is performed. Water sealing is reliably performed by supplying the water 14 and draining the sealing water 14 from the sealing water drain port. The opening / closing operation of the water supply opening / closing valve and the drainage opening / closing valve 22 is preferably performed by a timer in consideration of the dust 18 removal capability, but may be performed by an operator as necessary.
Then, the above method is repeated at the next removal of the dust 18.
Therefore, by using the water sealing device and the dust discharge method of the present invention, the dust in the annular ridge can be easily removed with a simple configuration.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included. For example, the case where the water sealing device and the dust discharging method of the present invention are configured by combining some or all of the above-described embodiments and modifications are also included in the scope of the right of the present invention.
Further, in the above embodiment, the case where the water sealing device is provided at the coke charging inlet of the coke dry digestion equipment has been described. If it accumulates, it will not be limited to this, For example, it is also possible to provide a water sealing apparatus in the skirt part etc. of a converter. In this case, of course, a dust discharge method can also be applied, but an inert gas is used as the gas injected from the gas injection pipe.

10: Water sealing device, 11: Lid, 12: Container, 13: Annular bowl, 14: Seal water, 15: Lower peripheral edge, 16: Pipe for water discharge, 17: Pipe for gas injection, 18: Dust, 19: Drain Mouth, 20: Water supply port, 21: Pipe for drainage, 22: On-off valve for drainage, 23: Upper outer peripheral edge, 24: Injection port, 25: Lower peripheral edge, 26: Bottom

Claims (4)

In a water sealing device in which an annular ridge is provided on the upper peripheral edge of a container having a lid portion, and the lower peripheral edge of the lid portion is submerged in sealing water supplied to the annular ridge so as to block the gas in the container from the outside ,
In order to discharge the dust accumulated in the annular trough from a drain outlet provided in the annular trough, a water discharge pipe for discharging water that fluctuates the seal water level in the annular trough, and the accumulated dust And a gas injection pipe for injecting gas in the direction of the drainage port. 2. The water seal device according to claim 1, wherein the gas injection pipe is disposed on an outer peripheral edge of the annular trough, and the injection port of the gas injection pipe is submerged in the seal water, and the shaft of the injection port is provided. A water sealing device characterized in that the gas is jetted between a lower end of a peripheral edge of the lid portion and a bottom surface of the annular ridge with a heart directed obliquely downward. The water sealing device according to claim 1 or 2, wherein the water sealing device is provided at a coke charging inlet of a coke dry digestion facility. It is a dust discharge method of the water sealing apparatus of any one of Claims 1-3, Comprising: The said gas by the said gas-injection piping, performing the water discharge of the said sealing water by the said water-discharge piping to the said annular trough The flow of the sealing water is made to flow up and down to change the water level of the sealing water in the annular tub by discharging the sealing water to form the flow of the sealing water toward the drain port, and the gas A method for discharging dust from a water seal device, comprising: collapsing the dust accumulated by the jetting of and discharging the dust from the drain port.

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