JP2558359B2 - Coke oven bottom lid cleaning device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an apparatus for cleaning deposits such as molten tar deposited on a lower surface of a plug of a furnace lid bottom of a coke oven and knife edge grooves.

[Conventional technology]

Conventionally, in this type of coke oven bottom cover cleaning device, a movable carriage that can move forward and backward along one side of the furnace lid is provided on the coke oven machine, and a screw cutter type is installed on the movable carriage. A rotary scraper is provided, a nozzle head is provided at the tip of the rotary scraper, and cleaning is completed by one forward / backward movement of the moving carriage by using the rotary scraper and the water jet together.

[Problems to be Solved by the Invention]

However, the moving speed of the moving carriage is the same in the cleaning area and the non-cleaning area, and is a low speed suitable for cleaning with a water jet. Moreover, since the moving distance in the non-cleaning area was longer than the moving distance in the cleaning area and the non-cleaning area,
Cleaning time becomes longer. Further, there is a disadvantage that a high discharge water pump has to be used in order to complete the cleaning by moving the moving carriage forward and backward once.

By the way, in recent years, various types of cleaning required for coke oven machines have been replaced with water jet type cleaning in order to improve the cleaning effect. Are required to do so.

[Object of the Invention]

The present invention has been made to solve the above-described problems, and a cleaning range similar to the conventional one can be obtained while the cleaning range is vertically divided into a plurality of parts by a water jet generated by one high-pressure water pump with a small discharge amount. The purpose is to be able to complete the cleaning in working hours.

[Means for solving the problem]

The coke oven bottom lid cleaning device of the present invention is, on the coke oven machine, provided with a movable carriage that can be moved forward and backward along one side of the furnace lid from one side of the furnace lid supported by the holder. , A screw cutter type rotary scraper capable of scraping off and cleaning the lower surface of the plug extending in the front-back direction of the furnace lid, and a nozzle head capable of cleaning the knife edge groove portion of the bottom of the furnace lid by cleaning with a water jet is provided at the tip of the rotary scraper. In the provided coke oven furnace lid bottom cleaning device,
A means for moving the moving carriage forward and backward by switching the moving speed of the moving carriage to a low speed in the cleaning area under the furnace lid and a high speed in the non-cleaning area, and for moving the nozzle head and the rotary scraper under the furnace lid. It is characterized by providing a means for changing the height position.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

First, the apparatus main body of the present invention will be described with reference to FIGS.

On the coke oven machine, a movable carriage 4 which is movable by a guide roller 2 and a guide rail 3 via a frame 1,
A moving cylinder 5 for moving the moving carriage 4 is provided. Further, on the coke oven machine, there is provided an outside holder for receiving and supporting the oven lid G from the oven lid desorption machine. The movable carriage 4 can be moved forward and backward from one side of the furnace lid G supported by the holder by the moving cylinder 5 along the furnace lid width direction.

A lever 7 having an L-shape in a side view, one end of which is rotatably attached via a pin 6 to the front end of the movable carriage 4;
A vertical movement cylinder 8 for vertically moving the other end of the lever 7 is provided, and a shock absorber 9 is attached between the vertical movement cylinder 8 and the lever 7.

One end of a shaft 10A extending in the longitudinal direction of the furnace lid is rotatably attached to a movable end of the lever 7 via a bearing 11, and a screw cutter type rotary scraper body 10B is mounted on the shaft 10A. There is. The rotary scraper 10 has a chain interlocking mechanism in which a chain is hooked between a sprocket 12 provided at the end of the shaft 10A on the support side and a sprocket provided at the bent portion of the lever 7 and the end of the fixed side. It can be driven by a motor provided on the moving carriage 4.

Shaft of the screw cutter type rotary scraper 10
A plurality of water jet nozzle heads 13 are provided at the tip of 10A, and when the rotary scraper 10 is brought into contact with the lower surface of the plug a of the furnace lid G supported in the forward tilted position by the holder, the knife edge The groove b is oriented near the plug.

Next, the control circuit of the moving cylinder 5 will be described with reference to FIG.

This control circuit connects the moving cylinder 5 and the pump 16 via the low speed switching valve 14A and the flow rate control valve 15A, and the switching valve 14A
A switching valve 14B for high speed and a flow control valve 15B for high speed are provided in parallel with A and the flow control valve 15A, and the flow rate returned from the moving cylinder 5 to the tank 17 can be adjusted by the low speed flow control valve 15A and the high speed flow control valve 15B. It is a meter-out circuit.

Solenoid coil SV-A1, A2 of switching valve 14A and switching valve 1
4B solenoid coil SV-B1 and B2 are energized in Appendix 1 (○)
Or demagnetization (x) is shown.

Solenoid coil SV-A1, A2 of switching valve 14A and switching valve 1
Excitation and demagnetization times of the 4B solenoid coils SV-B1 and B2 are set by limit switches LS-1, LS-2 provided on the frame 1 so that the movable carriage 4 can operate.

With this control circuit, the return flow rate from the moving cylinder 5 is set to the flow rate Qa only by the low speed flow control valve 15A during the cleaning zone low speed movement, and the high speed flow control valve by the flow rate control valves 15A, 15B during the non-cleaning zone high speed movement. Flow rate Qb (> Qa) for 15B only added to the above flow rate Qa (Qc = Qa + Q
b) That is, the flow rate is set to double or more.

The control circuit of the vertical movement cylinder 8 will be described with reference to FIG.

This control circuit connects the vertical movement cylinder 8 and the pump 16 via the switching valve 18C and the flow rate control valve 19C, and provides the switching valve 18D and the flow rate control valve 19D in parallel with the switching valve 18C and the flow rate control valve 19C. This is a meter-out circuit in which the flow rate of returning from the moving cylinder 8 to the tank 17 can be adjusted by the flow rate control valves 19C and 19D. The flow rate control valve 19C is connected to a measure cylinder 20 capable of setting the flow rate.

Solenoid coil SV-C1, C2 of switching valve 18C and switching valve 1
8D solenoid coil SV-D1 and D2 are excited in Appendix 2 (○)
Or demagnetization (x) is shown.

Solenoid coil SV-C1, C2 of switching valve 18C and switching valve 1
The excitation and demagnetization times of the 8D solenoid coils SV-D1 and D2 are set by a limit switch (not shown) provided on the frame 1 so that the movable carriage 4 can operate.

This control circuit allows the switching valve during high speed movement in the non-cleaning area.
The vertical scraping cylinder 8 is kept maximally extended by the 18D and the rotary scraper 10 and the nozzle head 13 are attached to the furnace lid G.
It is supported at a height position where it can be directed to the lower part of the knife edge groove b at the bottom (near the knife edge c), and the vertical movement cylinder 8 is moved by the switching valve 18C by the amount of oil in the measure cylinder 20 during the first low speed forward movement of the cleaning area. The rotary scraper 10 and the nozzle head 13 are accurately raised to the intermediate position of the knife edge groove portion b by performing the shortening operation, and the vertical movement cylinder 8 is extended to the maximum by the switching valve 18C during the first low speed backward movement of the cleaning area. The cylinder 20 is returned to its original state, and thereafter, the vertical movement cylinder 8 is shortened to the maximum by the switching valve 18D, and the rotary scraper 10 and the nozzle head 13 are lifted and arranged above the knife edge groove portion b (near the plug a). When moving forward and backward in the second cleaning area, the rotary scraper 10 and the nozzle head 13 are moved to the lower part of the knife edge groove b at the bottom of the furnace lid G (knife edge) as in the high speed movement of the non-cleaning area. It is arranged so as to be oriented in the vicinity of c).

Further, as described above, the knife edge groove b on the bottom of the furnace lid G
As shown in Table 2, the furnace lid G is tilted forward by the holder as in the conventional case when the upper part, the middle part, and the lower part are vertically divided into three sections, but the knife edge c is further cleaned. Further, the posture of the holder is set so that the furnace lid G is inclined backward when the vehicle is moving backward at a low speed.

In the present embodiment, an example in which the speed of the moving carriage 4 is changed by changing the amount of oil supplied to the moving cylinder 5, and a change in the amount of oil supplied to the vertically moving cylinder 8 is used to rotate the rotary scraper 10 and the nozzle head via the lever 7. An example in which 13 is moved up and down to change the position in the knife edge groove portion b at the bottom of the furnace lid G has been described, but it goes without saying that the present invention is not limited to the embodiment.

In the above structure, when the moving carriage 5 moves the carriage 4 forward and backward with respect to the furnace lid G supported in the forward tilted position by the holder outside the drawing, the return flow rate from the moving cylinder 5 is high during the high speed movement in the non-cleaning area. Since it is set to be twice or more that in the cleaning area at low speed, the moving carriage 4 moves in the non-cleaning area, which is longer than the cleaning area in terms of distance, at a moving speed that is twice or more the moving speed in the cleaning area. For this reason, the bottom of the furnace lid G can be cleaned by moving forward and backward twice in less than the conventional cleaning time.

When cleaning the bottom of the furnace lid G by moving it back and forth twice, as shown in FIGS. 7 (A), (B), (C), and (D), the rotary scraper 10 and the nozzle head 13 are used for the first time. When the vehicle is moving forward, it is arranged at an intermediate position of the knife edge groove portion b, and when it is moving backward, it is arranged above the knife edge groove portion b (near the flag a).
And the furnace head G is placed not in the forward tilted posture but in the backward tilted posture and the nozzle head 13 is directed toward the knife edge c only during the second backward movement. Therefore, the upper part (near the plug a), the middle part, the lower part (near the knife edge c) and the knife edge c of the knife edge groove b.
Are washed with a water jet from the nozzle head 13, respectively, to obtain the full width of the knife edge groove portion b and the knife edge c.
It becomes possible to clean the adhered substances such as the dissolved tar adhered to the. Further, since the rotary scraper 10 rotates while being pressed against the lower surface of the plug a in the process of moving in the upper portion of the knife edge groove portion b (near the plug a), adhered matter such as adhered carbon attached to the lower surface b of the plug at the bottom of the furnace lid G is attached. Can be scraped off and cleaned.

It should be noted that since the adhering matter adhering to the middle portion of the knife edge groove portion b is removed and then the adhering matter adhering to the vicinity of the lower surface a of the plug and the vicinity of the knife edge c is removed, cleaning is performed on the removal mark in the middle portion of the knife edge groove portion b. This is suitable in that dust easily flows and the cleaning effect is further improved.

〔The invention's effect〕

As described above, the present invention, when moving the rotary scraper and the nozzle head back and forth from one side of the furnace lid along the width direction of the furnace lid, the plug lower surface of the furnace lid bottom is scraped off and cleaned by the rotary scraper, and, The knife edge groove is divided into a plurality of parts in the vertical direction and washed with a water jet, and the cleaning time is extended by moving the lower part of the furnace lid a plurality of times to move the non-cleaning area at high speed with respect to the low speed movement of the cleaning area. By doing so, it is possible to maintain the same cleaning work time as before, and it is possible to perform sufficient cleaning with the water jet generated by a single high-pressure water pump with a small discharge rate, and complete the cleaning within the same cleaning work time as before. it can.
Therefore, the high-pressure water pump, the high-pressure water pipe, and the like can be downsized, and the initial cost and running cost of the equipment can be reduced.

[Brief description of drawings]

1 and 2 are a plan view, a front view, FIG. 3 and FIG. 4 showing an embodiment of the present invention, FIG. 1 is an enlarged view of an essential portion of FIG. 1 and FIG. 2, respectively, and FIG. FIG. 6 is a control circuit diagram of the vertical movement cylinder, FIG. 7 (A), (B),
(C) and (D) are operation explanatory views. 1 ... Frame, 2 ... Guide roller, 3 ... Guide rail, 4 ... Moving carriage, 5 ... Moving cylinder, G ... Furnace lid, a ... Plug, b ... Knife edge groove part, c ... Knife edge, 6 ... pin, 7 ... lever, 8 ... vertical cylinder, 10
...... Screw cutter type rotary scraper, 13 ...... Water jet nozzle head, 14A, 14B ...... Switching valve, 15A, 15B ...... Flow control valve, 16 ...... Pump, 18C, 18D ...... Switching valve, 19C, 19D ...... Flow control valve, 20 ・ ・ ・ Measure cylinder.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Yoshimizu 1-1, Anzen-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Tokyu Gas Co., Ltd., Tsurumi Plant (56) References: 60-172753 Kai 59-91339 (JP, U)

Claims (1)

(57) [Claims] 1. A coke oven machine is provided with a movable carriage capable of moving forward and backward along one side of the furnace lid supported by a holder in a width direction of the furnace lid, and the movable carriage extends in the longitudinal direction of the furnace lid. A bottom of the coke oven furnace is provided with a screw cutter type rotary scraper capable of scraping off and cleaning the bottom surface of the plug, and a nozzle head is provided at the tip of the rotary scraper for cleaning the knife edge groove portion of the bottom of the oven lid by cleaning with a water jet. In the cleaning device, a means for moving the moving carriage forward and backward by switching the moving speed of the moving carriage to a low speed in the cleaning area under the furnace lid and a high speed in the non-cleaning area, and the nozzle head and the rotary scraper under the furnace lid. A device for cleaning the bottom of the coke oven furnace lid, characterized in that means is provided for changing the height position each time the coke oven is moved.