BURNER MAINTENANCE TOOL

Abstract

A device for cleaning a tip of a furnace burner including a support tube of axis X intended to pass through the burner to have the burner passing through it and where the support tube includes a metal cable connected at one of its ends to a scraper and at the other end to a system for setting and maintaining the position of the scraper, in that the scraper is articulated to on the support tube between a first position aligned with the axis X in the continuation of the support tube and a second position perpendicular to the axis X, in that the scraper has a chamfered part on its profile and in that the support tube is connected to a rotation means for setting rotating the entire whole device in rotation. It can be set in place and manipulated from the rear of the burner, thereby ensuring a good level of safety for interventions such that a rotational and/or translational movement about the tip of the burner allows the concretions to be cleaned off effectively whatever their nature (shape, hardness, etc.) and their position.

Claims

1. Device for cleaning a tip of a furnace burner comprising a support tube of axis X intended to pass through the burner and wherein the support tube comprises a metal cable connected at an end to a scraper and at the another end to a system for setting and maintaining the position of the scraper, wherein the scraper is articulated on the support tube between a first position aligned with the axis X in the continuation of the support tube and a second position perpendicular to the axis X, and wherein the scraper has a chamfered part on a profile and the support tube is connected to a means for rotating the whole device.

2. Device according to claim 1, wherein the support tube is connected to a means for hammering along the axis X.

3. Device according to claim 1, wherein the support tube and the scraper have a diameter Φ≤73 mm.

4. Device according to claim 1, wherein the scraper is removable and interchangeable.

5. Device according to claim 1, wherein the support tube is removable and interchangeable.

6. Device according to claim 1, wherein the support tube and the scraper are hollow and communicating, wherein the support tube is open on both sides, wherein the scraper comprises holes communicating with the inside of the scraper and arranged on one side, and wherein the support tube and the scraper are intended to have compressed air passing through them.

7. Device according to claim 1, wherein the support tube and the scraper are hollow and communicating, the support tube is open on both sides, the scraper comprises holes communicating with the inside of the scraper and arranged on one side and the support tube and the scraper are intended to have a fluid loaded with a pulverulent material passing through them.

8. Device according to claim 1, wherein the means for rotating the whole device is a motorized wheel.

9. Method for cleaning a burner of a rotary furnace, comprising: inserting and placing the device according to claim 1 in the burner, setting the scraper in position from the aligned first position to the perpendicular second position using the position setting and maintaining system, maintaining the scraper using the position setting and maintaining system, rotating the device using the rotating means.

10. Cleaning method according to claim 9, wherein the insertion and placement of the device is performed using an actuator.

11. Cleaning method according to claim 9, wherein the device is moved in translation along the axis X manually or using a motorized actuator.

12. Cleaning method according to claim 9, wherein the metal cable is connected at the other of its ends to a motorized winch.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Further advantages may yet appear to those skilled in the art from reading the examples below, which are illustrated by the attached figures, given by way of example:

[0026] FIG. 1 is a perspective view of the device according to the disclosure,

[0027] FIG. 2 is a view in section of the device on the axis X,

[0028] FIG. 2A is a view in section of the device on AA,

[0029] FIG. 3 is a view in section of the scraper aligned with the tube,

[0030] FIG. 4 is a view in section of the scraper on IV-IV,

[0031] FIG. 5 is a schematic view of a burner equipped with the device according to the disclosure,

[0032] FIGS. 6 and 7 are end-on views of the tip of various burners with the device according to the disclosure.

DETAILED DESCRIPTION

[0033] The device 1 comprises a support tube 2 of axis X, a metal cable 3, a scraper 4 of elongate shape fixed to the support tube 2, a system 5 for setting and maintaining the position of the scraper 4, a rotating means 6 for rotating the device 1.

[0034] In FIG. 1, the metal cable 3 is positioned along the support tube 2 (FIG. 2A) inside guide tubes 21 attached to the support tube 2, but it could also be positioned inside the support tube 2 (FIG. 5).

[0035] The metal cable 3 is connected at one of its ends to the scraper 4 and at the other end to a system 5 for setting and maintaining the position of the scraper 4.

[0036] The scraper 4 is articulated to the support tube 2 about an axis Y perpendicular to the axis X at the end of the said support tube 2. It has two positions: a position aligned on the axis X in the continuation of the tube 2 and a second position perpendicular to the axis X, corresponding to the position of use of the scraper 4. The system 5 allows the scraper to be pivoted from one position to the other and held in position. The system 5 consists of a lever arm 50 driving a pulley 51 over which the metal cable 3 is wound. The lever arm 50 can be locked in order to immobilize the scraper 4.

[0037] In FIGS. 1 and 2, the support tube 2 is connected to a wheel 60 which constitutes the rotating means 6. It may be motorized.

[0038] In a variant, the scraper 4 is hollow and has holes 40 connecting the hollow 41 to the outside. These holes 40 are distributed along the length of the scraper 4. They may be distributed evenly or unevenly.

[0039] As is visible in FIG. 4, the scraper 4 has a chamfered part 42 on its profile. The chamfered part 42 has two faces 420 and 421. One face is pierced with holes 40, or both are. When the two faces 420 and 421 are both pierced with holes, the holes 40 may be offset or staggered from one face to the other, or not.

[0040] The scraper 4 has a drilling 43 near its articulation 44 and this drilling is aligned with the inside 20 of the support tube 2 when the scraper is perpendicular to the support tube in the position of use.

[0041] The method of cleaning a burner 7 using the device 1 will now be described.

[0042] The device 1 is set in the elongate position in which the support tube 2 and the scraper 4 are in the continuation of one another as illustrated in FIG. 3. The device 1 is inserted into the burner 7 from the rear of the said burner 7 until such point as the scraper 4 completely emerges from the burner on the furnace side. The insertion may or may not be performed at the center.

[0043] The system 5 is actuated and causes the scraper 4 to pivot from its elongate position to its position perpendicular to the support tube 2 and keeps it in position pressed against the tip 70 of the burner. The position setting and maintaining system is produced using a winch with a pawl applied to a sprocket wheel which allows the scraper to remain pressed against the tip 70.

[0044] The device 1 is set in rotation by the wheel 60 either by hand or by a motor, driving the scraper 4 which will rub against the entire periphery of the tip 70 of the burner 7 and remove the concretions which have accumulated there.

[0045] The device 1 may also be moved in translation along the axis X by hand or by a motorized actuator, driving the scraper 4 which will hammer the surface of the tip 70 of the burner 7 and detach the concretions which have accumulated there.

[0046] The device offers a number of possibilities depending on the nature of the various accumulations (shape, hardness, etc.). Because the scraper 4 is removable and interchangeable, it is possible to select between different types of scraper 4.

[0047] If the concretions are not adhering very firmly and are relatively small in size, only a short-duration (<5 min) use of the tool will be needed and the device 1 will be fitted with a scraper 4 that allows simple mechanical cleaning, for example without holes 40.

[0048] If the concretions are adhering more firmly but are relatively small in size, this will entail a longer duration (>5 min) use of the tool and the device 1 will be equipped with a scraper 4 with holes 40 allowing mechanical cleaning assisted by pressurized pneumatic cleaning achieved by the addition of compressed air, making it possible: [0049] to increase the efficacy of the cleaning [0050] to benefit from a cooling of the tool.

[0051] If the concretions are adhering very firmly and are large in size, the duration of use will be greater (>5 min) and the device 1 will be fitted with a scraper 4 with holes allowing mechanical cleaning assisted by pressure sandblasting achieved by adding compressed air laden with a pulverulent material (sand, abrasive, grit, etc.) making it possible: [0052] to increase the efficiency of the cleaning [0053] to benefit from a cooling of the tool.

[0054] The system is set in motion by the rotating means 6; this means may be manual or automated using a mechanism of the motor and actuator type.