JPH02279987A - Method for repairing refractory lining of riser from coke oven and the like - Google Patents

Abstract

PURPOSE:To effectively fill damaged parts and broken joints in need of repair with an amorphous refractory material with ease and without scattering it about by spraying the refractory from a spray nozzle in a setup wherein a long inspection rod is inserted to a depth requiring the work and a spray pipe inserted to the spot to be repaired is equipped with a cover plate at the spray nozzle as a means to prevent the material sprayed from scattering about. CONSTITUTION:An inspection rod 4 consists of a long pipe 9 having a length sufficient for searching through inside a riser tube, provided with a scale 8, and having at the lower part a searching part 10 bent sideways for searching spots-needing-repair 6. A spray pipe 7 has a length sufficient for providing proper repairs to the inside of a riser 2; this spray pipe has at its lower part a spray nozzle 13, which projects at a right angle to the pipe, and freely conveys a well kneaded amorphous refractory as a spray material; a feed pipe 14 for water added is provided along the spray pipe 7 and connected with a watering part 15 provided at the lower part of the spray pipe; the spray material is sprayed sideways from the spray nozzle 13. To the forward end of the spray nozzle 13 is attached a sufficiently large rectangular cover plate 16 in parallel with the spray pipe 7 so that the amorphous refractory material sprayed is prevented from scattering about or falling in drips.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for repairing refractory linings of coke oven riser pipes, etc., and particularly for easily and effectively repairing deep damaged areas and joint loss areas that are difficult to repair. The present invention relates to a method for repairing refractory linings of coke oven riser pipes, etc., which can be repaired.

Conventional technologyIn the past, damaged areas and missing joints in the refractory lining of kilns, etc.
Repairs are carried out by spraying monolithic refractories onto repaired areas from a spray nozzle connected to a spray repair machine.

However, when repairing damaged parts of refractories due to thermal distortion or thermal spalling inside the riser pipe of a coke oven, for example, the repaired area is often located at a deep position, such as 5 m from the top of the duct, and workers have to repair it. Repairs had to be made without being able to see the parts completely with the naked eye.

Problems to be Solved by the Invention For this reason, even when a monolithic refractory is sprayed from a spray nozzle toward a repaired area, the sprayed material spreads around the area, making it difficult to reliably embed the sprayed material into the damaged area. Moreover, there was a lot of waste as the spraying material scattered or flowed down to achieve the purpose.

In addition, the temperature of the sprayed material at the repair site is as high as approximately 600°C, and the monolithic refractories used for spraying have a high amount of added moisture (which makes filling the refractory into the damaged area poor. It was not possible to effectively prevent gas leakage or burnout of the outer steel shell.As a result, the life of the riser pipe could not be extended sufficiently and the riser pipe had to be replaced periodically. Replacement costs a lot of money, the coke oven has to be shut down, and the amount of coke produced and the amount of Cp Q steam generated decreases.

Means for Solving the Problems The present invention was developed in view of the above-mentioned problems, and it is possible to detect damaged parts of the refractory lining by inserting a long rod-shaped inspection rod into the deep part of the construction part such as the riser pipe of a coke oven. Search for joint defects, insert a spray pipe with a plate attached to the spray nozzle to prevent spraying material from scattering into the repaired area, and direct the spray nozzle to face the damaged or joint defect points searched above and remove the spray pipe. is installed in the construction area via a spray pipe fixture, and a spray repair device connected to the spray pipe is driven to spray monolithic refractories from a spray nozzle to repair damaged areas and joint missing areas. The present invention provides a method for repairing a refractory lining of a coke oven riser pipe, etc.

According to the present invention, a long rod-shaped inspection rod can be inserted deep into the riser pipe of a cox oven to search for damaged areas in the refractory lining and missing joints, and to check for damaged conditions. You can check it. Then, when the spray pipe is inserted into the construction area and the spray nozzle is positioned facing the damaged area or joint missing area searched above, the plate attached to the spray nozzle to prevent spraying material from scattering is inserted into the damaged area or the missing joint area. The spray pipe can be fixed to the construction area using the spray pipe fixture. After preparing in this way, by driving the spray repair device connected to the spray pipe and spraying the spray material of monolithic refractory from the spray nozzle, the spray material can be easily applied to and surrounding the repaired areas of damaged areas and missing joints. It can be effectively filled and repaired without any splatter.

Example Hereinafter, the present invention will be explained based on examples.

1 to 11 show an embodiment of the present invention.

The repair of the refractory lining is carried out using a removable opening 3 at the top of the riser pipe 2 of the coke oven 1 to be repaired as shown in Figures 1 and 2.
An inspection rod 4 is inserted to search for repair points 6 for damaged parts of the refractory lining 5 and missing joints, and based on this search, a blowing pipe 7 for repair is inserted and repaired.

As shown in Figure 1, the inspection rod 4 has a length that allows for sufficient exploration of the inside of the rising pipe, and as shown in Figure 3, it is a long rod of pipe with a scale 8 of about 5 to 6 m in length. A search part 10 is bent sideways at the lower part of the inspection rod 9 to enable searching for the repair place 6, and an elliptical steering part 11 is arranged at the upper part to make it easier to operate the inspection rod 4. Reference numeral 12 denotes a cleaning port through which air is supplied to or sucked into the inspection rod 4.

The spray pipe 7 has a length sufficient to repair the inside of the riser pipe 2 as shown in FIG. Added water supply pipes 1 are formed with spray nozzles 13 protruding perpendicularly from the lower part of the pipe that can be freely supplied, and are arranged in parallel along the spray pipe 7.
4 is connected to a watering part 15 disposed at the lower part, so that the spray material is sprayed laterally from the spray nozzle 13. At the tip of the spray nozzle 13, as shown in FIGS. 4 and 5, a sufficiently large rectangular contact plate 16 with a width ten to several dozen times the nozzle diameter of the spray nozzle 13 is attached to the spray pipe. 7 in parallel, and prevents the sprayed monolithic refractories from scattering to the surroundings or flowing down, so that the repaired area 6 can be reliably filled with the monolithic refractories. 17 is a scale display corresponding to the scale 8 of the inspection rod.

When using the above-mentioned blowing pipe 7, as shown in Fig. 6,
As shown in FIG. 7, the spray pipe 7 is inserted into the insertion hole 22 opened in the center of the spray pipe fixing device 21, which has channel members 18 facing each other and a fastening pin 19 inserted therethrough and connected with a screw nut 20. A tightening jig 24 is fixed to the upper part of the pipe 7, facing the central part with a rubber material 23 in between, as shown in FIGS. 8 and 9. Then, as shown in FIG.
1 so that it can be supported on the construction site. Then, a handle 26 with handles 25 protruding from both sides is attached to the tightening portion 27 of the spray pipe 7 as shown in FIGS. 10 and 11.
The spray pipe 7 inserted into the riser pipe 2 can be easily operated by a handle 26.

A dry spray repair device (not shown) is connected to the spray pipe 7, and the required amount of additive water is supplied from the additive water supply pipe 14 to the monolithic refractory material sufficiently kneaded with a predetermined binder to perform spray repair. We are making it possible to do this.

For repairs using the spray pipe 7 formed in this way,
Use the inspection rod 4 to blow compressed air into the repaired area 6 to burn off the carbon attached to the repaired area, or connect a vacuum cleaner or the like to the cleaning port 12 to clean the repaired area, and then perform further inspection. Repairs are carried out by blowing compressed air using a rod 4 to maintain the temperature of the refractory in the repaired area at 200 to 600°C.

In addition, from the spray repair device to the spray pipe 7, the kneaded monolithic refractory is pressurized at a constant pressure of about 1.5 kg/cm2 and fed to the spray pipe 7, and added water is also supplied. The pressure is set at about 2.0 kg/cm 2 to feed a constant amount, and the spray nozzle 13 sprays enough spray material for repair.

28.29 is a temperature measuring device such as a radiant heat thermometer that is attached to the outer periphery of the riser pipe 2 or the parts of the coke oven 1 that need repair, allowing early detection of damage to the lining refractory 5 and prompt repair work. We are making it possible.

Therefore, damage to the lining refractory 5 was discovered at an early stage based on the temperature measuring devices 28 and 29, and the inspection rod 4 was inserted into the riser pipe 2 of the coke oven 1 as shown in FIG. The searching part 10 with a bent tip is moved along the inner surface of the riser pipe 2 to search for a repair location 6 for a damaged or defective part, and to check the size and depth of the defect at the repair location. , Check the spraying work area and spraying amount. Then, a vacuum cleaner or the like is connected to the cleaning port 12 and the repaired area 6 is blown with air to burn off the remaining carbon and the repaired area 6 is thoroughly cleaned.
The above-mentioned spray pipe 7 is inserted into the riser pipe 2 as shown in FIG. It is fixed and supported at a predetermined position on the riser pipe 2 and repaired by operating a spray repair device.

When the spraying material is sprayed from the spraying nozzle 13 toward the repair area 6, there is little rebound of the spraying material, and even if rebound occurs, it is scattered to the surrounding area by the abutment plate 16 at the tip of the spraying nozzle 13 or flows down. It is possible to prevent this, and the repaired area 6 can be effectively filled and repaired.

The spraying material is made by mixing a high alumina monolithic refractory with a binder that can exhibit early hardening strength in the low temperature range and strength in the medium and high temperature range, so that it can be easily applied over a temperature range of 200 to 600°C.

In addition, since a handle is attached to the spray pipe, the spray pipe can be easily swung or moved up and down based on the search for the inspection rod, allowing repairs to be carried out.

As a result of this construction, the lifespan of the riser pipe has been reduced by 1.7 to 2.
．． We can expect a 0x extension.

Although dry spraying repair has been described above, wet spraying repair can also be performed in the same manner.

Other Embodiments FIGS. 12 and 13 show a blowing pipe 7 of another embodiment of this pipe.

At the bottom of the spray pipe 7, there is a universal pipe joint 3 as shown in the figure.
The spray nozzle 13 is attached through the hole 0 so that the spray nozzle 13 can face the repair location 6 at a variable angle.

This embodiment is preferable because the angle of the spray nozzle can be changed and the spraying material can be sprayed onto the repaired area as described above.

It is also possible to attach a control frame or the like to the spray nozzle section and operate it from above like a puppet.

Although the above description has been made regarding the repair of the riser pipe of a coke oven, the present invention can be similarly applied to the repair of deep parts of furnaces and other refractories.

Effects of the Invention As described above, in the present invention, even if the repaired part of the refractory is deep and cannot be seen with the naked eye, the spray nozzle can be reliably opposed to the repaired part and the spraying material can be sprayed to repair it. In addition, even if the spraying material rebounds from the repaired area, the backing plate attached to the spraying nozzle prevents it from scattering to the surrounding area, and prevents the spraying material from flowing down. ...Blowout pipe fixture.

It is possible to effectively repair refractories by preventing gas from leaking from the coke oven, and to extend the life of damaged items such as riser pipes. It can be extended to avoid equipment outages and save a lot of money.

[Brief explanation of drawings]

Figures 1 and 2 are illustrations for explaining the repair work of an embodiment of the present invention, Figure 3 is a side view of the inspection rod used in the above, and Figures 4 and 5 are the blowing pipes used in the same. Fig. 6 and Fig. 7 are a plan view and side view of the above-mentioned blow pipe fixture, Fig. 8 and Fig. 9 are plan views of the above-mentioned tightening jig. 10 and 11 are a plan view and a side view of the same handle, and FIGS. 12 and 13 are a partially omitted side view and a plan view of another embodiment of the same spray pipe. be.

Claims (1)

[Claims] (1) Insert a long rod-shaped inspection rod deep into the construction area of the riser pipe of a coke oven to search for damaged areas of the lining refractory or missing joints, and install a plate on the spray nozzle to prevent spraying material from scattering. Insert the spray pipe with the attached gun into the repaired area, place the spray nozzle part to face the damaged area or joint missing area searched above, install the spray pipe into the construction area via the spray pipe fixture, and connect to the spray pipe. A method for repairing lining refractories of coke oven riser pipes, etc., comprising driving a spray repair device to spray monolithic refractories from a spray nozzle to repair damaged areas and missing joints.