JPS5933636B2 - Water jet cleaning device for stun pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water injection device for cleaning the exhaust vents or the like of a combined coke oven.

Furnaces such as coke ovens usually contain a standpipe for exhausting gas from the oven. These standpipes are sometimes marked with "GOOsenec's neck".
An elbow part with a steep angle called "k)" is formed. The gas coming from the standpipe is sent to the main recovery unit, where all the gas sent is collected and sent to the recovery unit and gas purification unit for further processing before being discharged into the atmosphere. . The gas in each standpipe is 10
It is in a high temperature state exceeding 00℃. These gases contain large amounts of solids, silica, tar, etc. These solids and tar components adhere to the sides of the standpipe and quickly accumulate, obstructing gas flow through the standpipe. As a result, the efficiency of the furnace is drastically reduced and a significant amount of untreated gas leaks into the atmosphere, causing air pollution and health problems. Additionally, such gas leaks reduce the efficiency of recovery operations. Therefore, frequent cleaning of the standpipe is required to avoid the buildup of such solids.

In the past, various mechanical cleaning devices have been used, such as jack hammers and hydraulic scrapers. A typical example of such a device is U.S. Pat.
No. 088 and US Pat. No. 3,400,052. However, such mechanical cleaning devices have the following serious drawbacks. First of all, the gas is so hot that the device must be operated by remote control. Unless these remote control devices operate with very high precision, cleaning efficiency will be reduced. Furthermore, the solids form a crust and are tightly packed together, making them very hard. As a result, considerable force is required to remove the solids. However, if too much force is applied by such mechanical cleaning devices, the standpipe will fail. From the above, it must be said that these devices are unsatisfactory.

Therefore, there is a need for some type of improved standpipe cleaning device. The present invention seeks to overcome the above-mentioned drawbacks by providing a water injection device.

The apparatus comprises a movable support platform adapted for rotational movement into a position for engagement with a standpipe, and a water pipe means mounted on said platform and adapted to slide thereon for access to and from said standpipe. a power device for moving the water pipe; and one or more high pressure motors mounted on the end of the water pipe and extending substantially perpendicular to the axis of the water pipe for breaking up deposits in the standpipe. a water injection means for injecting water jet; a shaft coupling means for allowing a front part in the water pipe for conveying the water injection means to rotate relative to a rear part; a power means connected to the front part of the water pipe to rotate it; a water supply means connected to the water pipe; a high-pressure pump for pumping water to the water supply means; water tank means for supplying water; and recirculation duct means between the water supply means and the tank for returning water from the pipe to the tank when the water jet device does not require water. , said recirculation conduit, said water supply means, and valve means for controlling said tank.

More specifically, the object of the invention is to provide a device having the above-mentioned advantages, in which, before the water pipe starts operating,
The object of the present invention is to provide a device characterized in that support bracket means are mounted on the platform for contacting a portion of the standpipe to ensure alignment of the platform and the standpipe.

More particularly, it is an object of the invention to provide a device having the above-mentioned advantages, in which guiding means for guiding the water pipe as it advances into the interior of the standpipe are provided on the platform. and bearing means on the guide means for supporting the front part of the water pipe when the water pipe rotates.

The various novel features which characterize the invention are pointed out with particularity in the claims.

In order to better understand the present invention, the content of the present invention, its operational advantages, and the specific objects that can be achieved by using the device of the present invention are described below with reference to preferred embodiments and the accompanying drawings. This will be explained in detail.

Referring to FIGS. 1 and 2, a preferred embodiment of the present invention is indicated by arrow 10.

Such equipment is usually mounted on some kind of movable trolley or movable support so that it can be moved from one standpipe to another, but this means that the coke oven can be moved laterally. This makes sense when you consider that you have many furnaces in series, and that the standpipe for each furnace must be cleaned periodically. Cleaning is usually done at the same time as the oven is being reloaded with items to be baked. This kind of recharging is carried out by an orbital car called ``Rariichi-ki'' placed on the orbit. The driver of the rally drives the coke oven car back and forth and reloads the oven periodically in a known manner. Such a transport vehicle is therefore not shown in the figures. For simplicity of explanation, the corner parts of the car are indicated by the symbol V. The device 10 includes a movable platform or support 12 which is mounted for rotation with respect to the ram and force V by pins 14 and is provided with a reciprocating rotational movement by a hydraulic cylinder 16. can do.

In this way, the platform 12 can be rotationally lowered and positioned in alignment with the standpipe P, and can also be rotationally raised along the sides of the rallies and forces V and away from the standpipe P. . Platform 12
The main component is generally a structure with an open top channel-shaped cross-section, which has two sides 18, 18.
, and a bottom portion 20. A tongue-like member 22 extends forward from the bottom 20 of the platform 12 and is adapted to contact and rest on the edge of the standpipe P. As shown in the figure, the stand pipe P has a curved elbow and a mouth hole H, and the stand pipe is cleaned through this mouth hole H.

A sliding transport frame 24 is provided inside the platform 12.

The transport frame 24 has sliding mounting pins or trunnions 26,
26, the trunnions 26 protrude from both sides of the transport frame 24 and are attached to the platform 1.
2 through bearing slots 28, 28 formed in the sides 18 of 2. A hydraulic cylinder 30 is mounted on an upright arm 32 extending upwardly from the rear end of the platform 12 for sliding the transport frame 24 back and forth.

The piston rod 34 of the cylinder 30 is connected to the sliding conveyor frame 24.
is connected to the top of the Hydraulic power is applied to cylinder 30 by known power supply means (not shown). The power supply means is actuated by a suitable valve mechanism from a remote control device, which is located on the rally car V and can be operated by the driver. is preferred. Such a control method will be omitted to avoid complexity. Hydraulic cylinder 3
Alternatively, an electric motor may be used to operate a suitable drive mechanism such as a rack, pinion or screw drive mechanism;
Alternatively, a pneumatic cylinder or other means may be used, as long as it is suitable for sliding the transport frame 24 relative to the support platform 12. A rotary high-pressure water pipe 36 is mounted inside the transport frame 24, and the pipe 36 is mounted so as to be rotatable in bearings 38, 38, and has a T at its front or free end.
It has a letter-shaped head 39.

The T-shaped head 39 has two water injection nozzles 40 on each side of the pipe 36 to inject high pressure water into the pipe 3.
6 are arranged to fire in opposite directions in directions substantially angular to the axis of 6. According to the objectives of the invention, the nozzle is preferably mounted slightly forward. By doing so, the water dinit can be sprayed toward the inner surface of the stand pipe P, and the sealing surface around the mouth hole H can be effectively cleaned from an oblique direction. A high-pressure rotary shaft joint 42 is provided at the other end of the pipe 36, at least a part of which is fixed to the conveying frame 24, and the other part can freely rotate together with the rotary water pipe 36. High pressure water is then supplied to the rotary water pipe 36 while it is rotating.

Water may be supplied to the shaft coupling 42 using any suitable means such as a high pressure hose 44. Furthermore, the transport frame 24 is provided with a drive motor 46.

This motor may be electrically, hydraulically, or pneumatically operated, for example, and is connected to the rotating water pipe 3'6 by any suitable drive means, such as gear wheels 48 and 50. In this case, the large gear 50 is connected to the rotating water pipe 36, and the rotation of the large gear 48 causes the large gear 50 to rotate.
Therefore, the rotary water pipe 36 rotates and the water injection nozzle 40 rotates. However, it is entirely possible to adopt other methods for rotating the rotating water pipe 36. For example, instead of rotating the rotary water pipe 36 3600 times, it may be rotated back and forth 1800 times. In this case, the rotary shaft joint 42
Alternatively, a flexible hose, such as hose 44, can be used to connect directly to pipe 36. However, since such reciprocating motion can cause unacceptable wear on components such as hose 44, it is preferred to use rotary shaft coupling 42. The drive motor 46 is controlled by any suitable pedestal means (not shown);
It is preferable that the driver be able to operate it by disposing it above the Rally-1 and Power-1 V. A pump 52 is provided to supply high pressure water to the hose 44, and the pump 52 is supplied with water from a tank 54. Water is supplied to the tank 54 from any suitable water supply device at any time when the rally/force is stopped. A description of these water supply means will be omitted to avoid complexity. The flexible hose 44 is connected to the supply pipe 5
6, and water is supplied from the tank to the pump via a pipe 58. In order to achieve the object of the present invention, which is to remove tar-like deposits with high-pressure water, a very large pumping capacity and high pump pressure are required.

Pump 52 therefore has a very high pumping capacity and is driven by a motor 59 which operates with suitable power. A bypass pipe 60 extends between the supply pipe and the tank to avoid failure of such high pressure pumps and failure of the entire system. This bypass pipe 6
0 allows excess water to be recirculated from the tank to the pump while the pump remains in operation.
Suitable valve control means, such as valve 62, are provided to control the amount of water supplied through the supply pipe. Additionally, a valve 64 is provided in the bypass pipe to control the flow rate of water through the bypass pipe. A high-pressure water accumulator is installed instead of a bypass system to store water under high pressure.
A method of releasing water may be adopted as necessary. Preferably, these two valves are operated in conjunction with each other, ie, when valve 62 is closed, valve 64 is open, or when valve 62 is open, valve 64 is closed.

Additionally, a valve 66 may be provided in the pipe 58 to control the supply of water from the tank to the pump. As is well known in the art, a suitable drain tap and drain valve will normally be provided. However, to avoid complication, a description of such drainage means will be omitted.

To operate the device, the operator aligns and positions the Rally-V with the predetermined standpipe P.

Such an alignment operation is automatically performed, and at the same time that the rary and force are aligned and positioned at the top of the coke oven in order to reload the coke oven, this device is also aligned and positioned at the top of the coke oven. It is preferable that they are trained to do so. The operator then opens the mouth hole H using a suitable remote tipping means (not shown).
The hydraulic cylinder 16 is then operated to rotate the platform 12 into a downwardly angled position so that the tongue 22 rests on the pipe P.

Next, the hydraulic cylinder 30 is operated to tilt the transport frame 24 in the direction of the pipe P so that the water injection nozzle 40 is located in a corresponding position with respect to the deposits in the pipe.

The motor 46 is then started to rotate the pipe 36 and at the same time the pump 52 is started and the valves 62 and 64 are actuated to supply water to the water injection nozzle 40. By operating the hydraulic cylinder 30, the water injection nozzle 40 can be inserted deeper into the pipe P or pulled back to clean the mouth hole H. When the cleaning operation is completed, valves 62, 64 are closed, pump 52 is stopped, motor 56 is switched off, and hydraulic cylinder 30 moves in the opposite direction to retract transport frame 24. The entire platform 12 is then rotated upwardly to close the orifice, and the apparatus is then ready to clean the subsequent standpipe. If necessary, the platform 12 can be further moved by suitable means (not shown) to bring it into alignment with the vertical section of the standpipe P and to clean said vertical section. However, in most cases, the deposits are on the curved elbow of the standpipe.
Cleaning this area usually solves the problem. As a result of experiments using the apparatus of the present invention, it was found that tar-like deposits that were firmly fixed without any gaps could be broken into fine particles without damaging the surface of the pipe P.

This method of cleaning pipes with high-pressure water dinit is particularly advantageous, since by applying water at a temperature equal to room temperature to very hot deposits, the water is instantaneously converted to steam. was discovered. As a result, large amounts of heat are rapidly lost through tarry deposits. This rapid cooling of the tar-like deposit causes the deposit to crack and detach from the hot surface of the pipe, thereby cleaning the interior surface of the pipe. Since the crushed deposits are sufficiently small, they are captured by the gas and transported to the main recovery device where they are recovered and processed. It was impossible to clean the mouth hole H and its sealing surface using known devices, but by cleaning this part with the device of the present invention, the mouth hole H can be sealed more effectively and combustion gas can escape to the atmosphere. can be prevented.

Harmful gas emissions are thus reduced and the efficiency of the recovery system is significantly increased. It is of course possible to change the location of the water injection nozzle inside or outside the standpipe as long as the desired result is achieved.

Therefore, more than two nozzles may be used as long as the nozzles are arranged at even angular intervals around the circumference of the rotating water pipe to equalize the reaction of the very high pressure dinit.

In a typical example, the water pressure is 490 kgm/Cd and the flow rate is 135 liters/min.

What has been described above is one preferred embodiment of the present invention.

It is to be understood that the apparatus of the present invention is not limited to any of the specific features described above, but that all modifications are included within the spirit of the claims.

[Brief explanation of the drawing]

FIG. 1 is a side elevational view of a device according to the invention; FIG.
3 is a top plan view of the apparatus shown in FIG.
3 is a cross-sectional view along line 4, and Figure 4 is an enlarged view of the water injection nozzle.
FIG. 5 is a schematic end elevation view showing the water supply and control system, and FIG. 6 is a top plan view of FIG. 12... Platform, 24... Transport frame, 36... Rotating water pipe, 40...
...Water injection nozzle, 52 ...Pump, 54
... Tank, 60 ... Bypass pipe.

Claims (1)

[Scope of Claims] 1. An elbow, an access opening, a cover plate disposed at the elbow so that the inside of the standpipe can be accessed from the outside, and a cover plate formed on the periphery of the opening. In a high pressure water injection device for cleaning a coke oven standpipe, the cover plate has a sealing surface that effectively blocks the orifice to prevent gas from escaping from the orifice. a support member capable of rotationally displacing between a non-operating position and a lower operating position aligned with the mouth hole, the support member having a power device for performing the angular displacement in the vertical direction; a conveying member slidably attached to the support member, the conveying member telescopically sliding telescopically relative to the support member to enter and exit the mouth hole, and having a power device for performing the operations;
a high-pressure water pipe rotatably mounted on the conveying member and having an end protruding from the conveying member, the high-pressure water pipe having a power device for at least partially rotating the water pipe; at least two injection nozzles provided at the end of the pipe for simultaneous jetting of water at a large angle with respect to the axis of the water pipe and in mutually opposite directions, the nozzles being inserted into the mouth hole; an injection nozzle that diffusely sprays high-pressure water to impact the inner surface of the standpipe and clean the sealing surface of the orifice from an oblique direction when the standpipe is located outside the orifice;
and a high-pressure, large-flow water supply means for supplying water to the water pipe. 2. The water injection device according to claim 1, wherein the water supply means includes a high-pressure, large-flow pump and a valve, and the pump has an inlet and an outlet, and a tank for supplying water to the inlet. , a conduit connecting the outlet and the water pipe, and a duct for recirculating water from the outlet to the tank, the valve controlling water flow through the conduit and the recirculation duct to control the pump. A device characterized in that it is arranged to activate and deactivate the water jet without affecting the operation of the water jet. 3. The water injection device according to claim 1, wherein the water supply means includes a high-pressure water accumulator, a pump for storing water in the accumulator, and a conduit connecting the accumulator and the water pipe. A device characterized by: 4. The water injection device according to claim 1, including a rotatable water supply connecting means, the connecting means having a fixed part and a rotating part, and the rotating part being connected to the water pipe. , the fixed part is fixed to the conveying member,
A device characterized in that the water supply means is connected to the fixed part. 5. The water injection device according to claim 1, wherein the conveying member includes bearing means for supporting the rotary water pipe around a central axis thereof, and bearing means extending outwardly on both sides of the conveying member to support the rotary water pipe. sliding means for slidingly engaging the support member, and comprising a drive motor above the conveying means and further comprising drive coupling means extending between the motor and the water pipe to rotate the water pipe. A device featuring: 6. The water injection device according to claim 1, wherein a spray head is provided at an end of the water pipe, and a peripheral edge of the water pipe is inclined forward with respect to the spray head and with respect to the axis of the water pipe. characterized in that it contains at least two spray nozzles mounted on said spray head equidistantly from each other and is thus arranged to spray water diffusely forwardly and outwardly with respect to said spray head. water injection device.