JPS62112682A - Mechanism for changeover of spray pressure of ammoniacal liquor spray nozzle in coke oven - Google Patents

Abstract

PURPOSE:To obtain the titled mechanism which allows the changeover of a spray pressure of an ammoniacal liquor spray nozzle economically and with certainty with a small quantity of power air, by utilizing a charging car located on the top of a carbonization chamber to supply power air separately to each pneumatic changeover cylinder. CONSTITUTION:When a charging car 7 moves to a prescribed position on the top of a carbonization chamber, connector tubes 12a and 12b move out in the directions 11a and 11b by means of a cylinder unit 13 to allow engaging parts 121 at the tip to engage with connector sleeves 11a and 11b. A changeover valve 15 is actuated to supply power air to an air pipe 14a and, through each 'a' arrangement, to a pneumatic changeover cylinder 6. The cylinder 6 is thus actuated to change an ammoniacal liquor spray from low-pressure spraying to high-pressure spraying. Then, the exhaust air is discharged from the changeover valve 15 through an air pipe 10b and each 'b' arrangement. After the changeover of the pressure of the ammoniacal liquor spray, coal is fed into the carbonization chamber from the charging car. After coal feeding operation is finished, the changeover valve is turned to supply power air to the changeover cylinder 6 through another connector pipe 12a, thus changing the ammoniacal liquor spray back to low-pressure spraying.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a mechanism for switching the ammonium water supply pressure of an ammonium water spray nozzle provided in a riser pipe or the like of each carbonization chamber in a coke oven.

[Conventional technology]

In a coke oven, an ammonium water spray nozzle is installed between the rising pipe and the air collecting pipe (dry main) of each carbonization chamber. Spraying is done. In contrast to such constant spraying of ammonium water, when charging coal into the carbonization chamber, a particularly high-pressure ammonium water spray is used to prevent gas from blowing out in the furnace. Gas is forced to flow from the riser pipe to the collection pipe. For this reason, the ammonium water spray nozzle installed in each carbonization chamber has a fifth
As shown in the above, a pressure switching air cylinder (required) is attached to each of them to switch between constant low-pressure spray and high-pressure spray during charging.

In order to operate each of these switching air cylinders, power air is supplied to each cylinder from the main pipe (c), and a 3-position switching valve (to) attached to each cylinder controls the power air. The supply to the cylinder is switched.

[Problems that Hakkai attempts to solve]

In such a conventional mechanism, it is necessary to keep the main piping (to) pressurized at all times because it is necessary to sequentially drive the switching air cylinders (6). However, the number of switching devices (air cylinders) arranged is usually limited. Since the number of switching devices ranges from several dozen to more than 100, the amount of power air leakage from these switching devices is considerable overall, causing energy loss. The present invention was created in view of these conventional problems. Something,
It is an object of the present invention to provide a mechanism that can economically and reliably change the injection pressure of an ammonium water spray nozzle using a small amount of power air.

[Means and effects for solving the problem] For this reason, the present invention utilizes a charging vehicle located at the upper part of the coking chamber when charging coal that requires high-pressure switching of the ammonium water spray, and switches between each switching air cylinder. Its basic features are that a funnel-shaped connector tube is provided at each end of a pair of air piping connected to each switching air cylinder; The charging car is equipped with a pair of connector pipes whose tips can be inserted into and removed from the connector cylinder so that they can move forward and backward in the direction of the connector cylinder.Power air is supplied to the pair of connector pipes from the charging car side via a switching valve. The reason is that it is configured so that it can be selectively supplied.

According to the apparatus of the present invention, at a position in the coking chamber where one coal is charged, a connector pipe advances from the charging car stopped above the coking chamber in the direction of the connector cylinder of the switching air cylinder of the coking chamber, Its tip fits into the connector cylinder.
In this state, the switching valve is operated, power air is supplied to the switching air cylinder through the connected connector pipe and connector tube, and the pressure of the ammonium water spray is switched by driving the air cylinder, resulting in low-pressure injection. Switches to high pressure injection. After that, the carbonization chamber is loaded with coal, and after the carbonization is completed, the switching valve is switched to supply power air to the switching air cylinder through the other connector pipe and connector tube, and the low-pressure ammonium water spray is again injected. Switch to . Then, the connector tube is retreated from the connector cylinder, and the charging car is moved.

〔Example〕

1 to 3 show an embodiment of the present invention,
(1) is the coke oven main body, (2) is the riser pipe installed in each carbonization chamber that makes up the coke oven, (3) is the air collection pipe (dry main), and (4) is the communication between the riser pipe and the air collection pipe. The bent pipe (5) is an ammonium water spray nozzle installed in this bent pipe, and the gas in each carbonization chamber is collected into the air collecting pipe (3) through the rising pipe (2) and the bent pipe (4). Each ammonium water spray nozzle (5) is equipped with a pressure switching device R (A) having a switching air cylinder (6), and the switching air cylinder (6) controls the ammonium water injection by the ammonium water spray nozzle (5). It is possible to switch between high pressure and low pressure.

Further, (7) is a charging vehicle for charging coal into the carbonization chamber, and is movable by rollers (9) on rails (8) provided on the coke f. This charging vehicle (7)
The machine receives coal from the gate at the bottom of the charging coal tank, travels to a designated carbonization chamber, and charges the coal into the chamber.

In the present invention, in such equipment, a funnel-shaped connector tube is installed at each terminal of a pair of air piping (LOA) (1OB) connected to a switching air cylinder (6) arranged for each carbonization chamber. (lla) (llb) t-attached.

Both connector strips (11a) (llb) are fixed to the upper part of the coke oven in parallel with each other and with their openings facing toward the charging car.

On the other hand, the charging car (7) has a pair of parallel connector tubes (12
a) (12b) is provided so that the connector can be moved forward and backward in any direction. In this embodiment, the charging vehicle (7) is provided with a cylinder device (to), and a pair of connector tubes (12aXIZb) connected by a connecting member are held in this cylinder device (to). It is possible to move forward and backward in the (11aX11b) direction.

A fitting portion (121) made of an elastic material such as rubber is formed at the tip of each connector tube (2). This fitting part (1
21) has a spherical tip so that it can be reliably fitted into the connector tube α■.

Each connector tube (12a) (12b) has a telescopic tube section (14
1) is connected to the air pipe (14aX14b),
This allows the connector pipe (2) to move forward and backward. Both air pipes (14a) (14b) are connected to power air pipe αq via a switching valve (to), and this switching valve (b) selectively supplies power air to both air pipes (1+aX14b). That's what I do. This switching valve (to) is usually composed of a three-position switching valve.

The switching valve (2) may be fixedly provided on the connector pipe side as shown in Fig. 4, and in this case, the switching valve (to) and the power air piping (to) are connected to the telescopic pipe section (171
) connected by air piping (b).

According to such a device, 1 charging car (7) is required for coal charging.
In the state where the connector tubes (12a) and (12b) advance toward the connector tubes (11JL) and (ob) by the cylinder device (toward), the fitting portions (121 ) is the connector tube (llaχ11b)
Fits inside. In this state, the switching valve (G) is operated to supply power air to one of the air pipes (14a), the connector pipe (12a), the connector tube (11a) and the air pipe (1).
0a) Supply to the switching air cylinder (6) through i. This drives the switching air cylinder (6), switches the pressure of the ammonium water spray, and switches from the low-pressure injection to the high-pressure injection.

Note that when this switching air cylinder (6) is driven, the air discharged from the cylinder passes through the other air pipe (1ob), the connector tube (llb), the connector pipe (12b), and the air pipe (x4b) to the switching valve ( 2). After switching the ammonium water spray pressure, coal is charged from the charging car to the carbonization chamber, and after the completion of the coal charging operation, the switching valve is switched to connect the other connector pipe (12b) and the connector tube (1xb).
) to supply the power air to the switching air cylinder (6), and switch the ammonium water spray to low pressure injection again. After that, the cylinder device (to) connects the connector pipe Qh) (ub
) Retract the pipe connector tube and load the charging car <7) 'IfI:
Move the coal to the next carbonization chamber where it should be charged.

〔Effect of the invention〕

According to the present invention described above, when charging coal that requires high-pressure switching of the ammonium water spray, power air is individually supplied to each switching air cylinder using the charging vehicle located at the top of the carbonization chamber. As a result, the injection pressure of the ammonium water spray nozzle can be changed economically and reliably using a small amount of power air without causing the problem of a large amount of power air leaking.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a sectional view partially showing the connector tube and the connector tube. FIG. 4 is a plan view showing another embodiment of the loading vehicle side mechanism. FIG. 5 is an explanatory diagram showing a conventional pressure switching mechanism. In the figure, (6) is the switching air cylinder, (7) is the charging vehicle, (10XIQaX10b) is the air pipe, (11
) (11a) (too) is the connector tube, (12) (12
a) (12b) is the connector pipe, (G) is the switching valve, (G)
Shown are power air piping pipes.

Claims (1)

[Claims] Rising pipe of each carbonization chamber that makes up the coke oven Anhydrous water spray nozzle installed between the air collection pipe and the The pressure of the ammonium water sprayed from the nozzle is With the switching air cylinder provided for each Safety achieved by switching between high and low pressure Water spray nozzle jet pressure switching mechanism connected to each switching air cylinder. Connect a funnel-shaped connector to each end of a pair of air pipes. A connector tube is provided, and the tip of the charging car is attached to the connector tube. A pair of connector tubes that can be inserted into and removed from the connector tube is provided so that it can move forward and backward in the direction of the connector cylinder, and Charging vehicle into a pair of connector pipes via a switching valve Power air can be selectively supplied from the side. A coke oven characterized by having the following configuration: Injection pressure switching of ammonium water spray nozzle mechanism.