JP2006078156A - Method and device for cleaning flue - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently and more stably perform, without manpower, cleaning work of removing deposit on the wall surface in the flue extending from a furnace such as an incinerator or a heating furnace to a chimney stack, when the flue cross section is circular and when it is non-circular. <P>SOLUTION: A carriage having three or more wheels in the peripheral direction of the flue is positioned and moved in the central part of the flue cross section by pressing each wheel of the carriage onto the inner wall of the flue, and the inner wall of the flue is cleaned by one or more of a brush, a cutting edge, and a high-pressure water injection nozzle that are attached to the head of each of a plurality of supporting rods arranged radially from the carriage toward the inner wall of the flue. One or both of the brush and cutting edge are attached to the head of each of the elastic supporting rods arranged radially in an umbrella frame shape, and can be brought into pressure contact with the inner surface of the flue while being rotated. In any case, a plurality of heads can be disposed in each supporting rod, and each supporting rod can be rotated and rocked in the peripheral direction of the flue. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is effective in removing the deposits on the inner wall surface of the flue from the furnace such as an incinerator or heating furnace to the chimney when the flue cross section is circular or non-circular, without human intervention. The present invention also relates to a stable method and apparatus.

The following patent documents are examples of techniques for performing the above-described cleaning operation of the inner wall surface of the flue without relying on human hands.
Patent Document 1 is directed to a flue having a circular cross section. Brushing is carried out while running the carriage on the rail laid in the flue, and the brush revolves around the flue center axis while rotating. The revolution axis is adjusted by extending and retracting the support arm attached to the carriage.
Patent Document 2 is directed to a flue having a rectangular cross section. Brushing while running a caterpillar type carriage, the brush is at the tip of a rotating arm attached to a support column supported by a lift on the carriage and revolves around the flue axis while rotating. The length of the rotating arm and the lift of the column are adjusted according to the distance between the brush and the flue wall so that the brush contacts the entire wall.
JP-A-1-139913 JP 7-42931 A

Although the techniques described in the above patent documents are expected to have a certain effect, there is a concern about the stability of the carriage during brushing. That is, when the rotating arm with the brush attached to the tip is revolved around the flue axis, the carriage may be tilted or fall over due to the frictional resistance between the brush and the wall surface, and in that case, the work must be stopped. Disappear. In particular, there is a concern in Patent Document 2 that targets a flue with a non-circular cross section.
The flue from an incinerator or heating furnace to the chimney is often provided with an upward slope toward the chimney. In addition, the cross-sectional shape is circular and the ceiling has an arch shape. In addition, wrinkles and the like may be irregularly attached. In these cases, the cart needs more stability.
Therefore, the problem to be solved by the present invention is to remove the deposits on the inner wall of the flue from the furnace such as an incinerator or heating furnace to the chimney, when the flue cross section is circular and non-circular, It is efficient and more stable without human intervention.

The method of the present invention for solving the above problem is to position the carriage at the center of the cross section of the flue by pressing each wheel of the carriage provided with three or more wheels in the circumferential direction of the flue against the inner wall of the flue. The inner wall of the flue is cleaned by one or more of brushes, cutting blades, and high-pressure water jet nozzles attached to the heads of a plurality of support rods arranged radially from the carriage toward the inner wall of the flue. Is a method for cleaning a flue.
In the method of the present invention described above, one or both of a brush and a cutting blade can be attached to the head of a support rod having elasticity arranged radially in the shape of an umbrella and pressed against the inner surface of the flue while rotating. In any of the methods of the present invention, each support rod can be provided with a plurality of heads, and each support rod can be rotated or swung in the flue circumferential direction.

Further, the present invention for solving the above-mentioned problems includes a carriage, wheels and support rods disposed on the carriage, brushes, cutting blades, one or more of high pressure water injection nozzles attached to the head of the support rod, The vehicle is composed of trolley travel means, and three or more wheels are arranged radially from the trolley in the circumferential direction of the flue, each wheel is provided with a pressing means against the flue inner wall, and the support rod is directed toward the flue inner wall. A flue cleaning device characterized in that a plurality of them are arranged radially.
In the apparatus of the present invention, the main rod in the flue axis direction attached to the carriage is provided with elastic support rods radially in the shape of an umbrella, and provided with a slider and a lever for opening and closing the support rod in the shape of an umbrella. One or both of a brush and a cutting blade can be attached to the head of the support rod, and a means for rotating the brush and the cutting blade and a means for pressing against the inner wall of the flue can be provided. In any case of the device of the present invention, each support rod can be provided with a plurality of heads, and a rotation means for rotating each support rod in the flue circumferential direction or a swinging means for swinging can be provided.

  According to the present invention, the cleaning work for removing the deposits on the inner wall of the flue from the furnace such as an incinerator or a heating furnace to the chimney is efficient regardless of whether the flue cross section is circular or non-circular. And it can carry out more stably.

Hereinafter, the present invention will be described with reference to specific examples shown in the drawings.
As shown in the example of FIG. 1, the carriage 3 provided with the cleaning means is inserted into the flue 1 and is positioned and moved at the center of the flue cross section. This example employs the brush 11 as a cleaning means. As shown in FIGS. 2 and 3, three or more wheels 4 of the carriage 3 are arranged radially from the carriage 3 and pressed against the inner wall 2 of the flue in the circumferential direction of the flue. In the flue axis direction, there may be two as shown in FIG. When the cross section of the flue is circular, the cart 4 can be positioned with a minimum of three in the circumferential direction as shown in FIG. FIG. 3 shows an example of positioning with four wheels 4 in the circumferential direction in a non-circular arch shape.

A rubber tire or the like for automobiles is used for each wheel 4, a hydraulic cylinder or the like is provided between the vehicle body 3 and the wheel 4 and pressed against the flue inner wall 2, thereby positioning the carriage at the center of the flue cross section. With the adjusted pressing force and the action of the coil spring 5 shown in the figure, the cart 3 can be efficiently prevented from tilting or moving even during the cleaning operation of rotating the brush 11 or the like.
In order to run the carriage 3, it may be self-propelled by a hydraulic motor or electric motor, or may be pulled by a winch or the like placed outside the flue 1. The cleaning operation can be performed while the carriage 3 is running, or can be performed in a stopped state. In the former case, it may be a predetermined traveling speed or may be changed as appropriate according to the situation.

The cleaning operation can be performed by brushing, cutting, or high-pressure water injection alone or in combination with one or more of a brush, a cutting blade, and a high-pressure water injection nozzle. The brush, the cutting blade, and the high-pressure water injection nozzle are attached to the heads 10 of the plurality of support rods 9 that are arranged radially from the carriage 3 toward the flue inner wall 2. FIG. 1 shows an example of brushing. Frames 7 and 8 are provided on a main rod 6 in the flue axis direction attached to a carriage 3, and a support rod 9 is attached to each of the frames 7 and 8.
Brushing and cutting are performed by pressing the brush 11 and the cutting blade 14 illustrated in FIG. 7 against the flue wall 2 and sliding. As the brush 11, a wire brush made of brass, a nylon brush with abrasive grains, or the like can be used. High-pressure water injection is performed by injecting high-pressure water 18 onto the inner wall 2 from a nozzle 17 attached to the head 10 as shown in FIG.

The pressure contact between the brush 11 and the cutting blade 14 can be performed by attaching a hydraulic cylinder to the support rod 9. Further, as shown in FIG. 5, the insertion rod 12 fixed to the head 10 can be inserted into the distal end portion of the support rod 9 and pressed by the spring 13.
The sliding can be performed by running the carriage 3, and can be performed by rotating (revolving) or swinging the support rod 9 around the flue axis, or by rotating (rotating) the head 10 in the plane. it can. FIG. 4 shows an example of the revolution that rotates the flange 7 and the rotation of the head 10. The rotation can be performed by incorporating a planetary gear into the flange 7. Further, as will be described later, by attaching a plurality of heads 10 to the support rod 9, cleaning can be performed more effectively.
In the case of high-pressure water injection, the support rod 9 can be rotated (revolved) or swung around the flue axis. Alternatively, the head 10 may be rotated (rotated) in the plane. Water is supplied from the outside by a hose.

The rotation (revolution and rotation) and swinging can be performed by a hydraulic motor or electric drive as in the traveling of the carriage 3. The hydraulic unit for the hydraulic motor can be mounted on the carriage 3, and in the case of electric power, power is supplied from an external power source through a cable. Further, by providing a plurality of support rods 9 in the flue axis direction and further performing revolution in the reverse direction, cleaning can be performed more effectively.
FIG. 6 shows an example of a mechanism for revolving the frames 7 and 8 provided in two stages as shown in FIG. 1 in the opposite direction. A reverse rotation shaft 38 is coaxially arranged outside the normal rotation shaft 37, and the frame 8 is fixed to the normal rotation shaft 37 and the frame 7 is fixed to the reverse rotation shaft 38. A normal rotation shaft 37 is connected to a motor 39 provided in the main rod 6, and the rotation of the bevel gear 42 fixed to the normal rotation shaft 37 is transmitted to the bevel gear 44 fixed to the reverse rotation shaft 38 via the bevel gear 43. Reverse. The bevel gear 43 is pivotally supported on an inner cylinder 41 provided separately from both the rotating shafts 37, 38, and the inner cylinder 41 is fixed to a holding frame 40 provided separately from both the rotating shafts 37, 38.

  When the flue cross section is non-circular, it is difficult to press the brush 11 and the cutting blade 14 uniformly in the flue circumferential direction. In this case, as shown in FIG. 8, the brush 11 having long bristles is used, and the support rod 9 is rotatably attached to the arm 15 fixed to the frame 7, and revolved while being pressed by the cylinder 16, so that the flue It is possible to brush the entire surface of the inner wall 2. However, the corners at the lower ends of both inner walls 2 in FIG. 8 are preferably used in combination with other means that are difficult to clean by themselves. As shown in FIG. 9, it can be cleaned by performing high-pressure water injection.

  When a flue with a non-circular cross section is targeted, as shown in FIG. 10, the support rods 9 are radially arranged in an umbrella shape, the support rods 9 have elasticity, and the head 10 has a brush 11 and a cutting blade. The corner portion can also be easily cleaned by attaching one or both of 14 and contacting the flue inner wall 2 while rotating. The rotation of the head 10 is a rotation that rotates the head 10 in a plane. A lever 20 corresponding to the support frame of the umbrella is attached to the support rod 9, and the slider 21 is brought into pressure contact by sliding along the main rod 6. By disposing the support rod 9 on the main rod 6 with a slight play in the circumferential direction of the flue, a brush 11 and a cutting blade 14 are provided at the corners at both lower ends of the flue inner wall 2 having an arched section. Can be reliably pressed.

  Although the slider 21 can be easily slid back and forth using hydraulic pressure or electric power as a power source, an example using a spring made of a shape memory alloy is shown in FIG. Inside the slider 21, springs 28 and 29 are inserted with a stopper 30 fixed to the main rod 6 interposed therebetween. The spring 29 is made of, for example, a shape memory alloy that becomes a straight line at 50 ° C. or higher. When heated from a state of being compressed by the spring 28 as shown in (a) at normal temperature, the spring 29 extends at 50 ° C. or higher and slides to the right as shown in (b). When the temperature is lower than 50 ° C., the spring 28 is pressed to contract and slide to the left. This method can use simple means such as a battery as a heat source. If the slide width is insufficient with this method, it can be used in combination with other methods.

By attaching a plurality of heads 10 to each support rod 9, a brush group or a cutting blade group can be formed, and these can be pressed against the entire circumference of the flue inner wall 2. In the example of FIG. 13, four heads 10 are disposed on the receiving frame 19, and the receiving frame 19 is attached to the support frame 9 via a joint 27. The receiving frame 19 can be rotated by fitting a concave portion and a convex portion at the center to the joint 27 as shown in the figure, and can be fixed by a flange 23 and a bolt 24 fixed to the receiving frame 19. The support rod 9 is attached to the joint 27 with bolts and nuts 25.
A motor 26 is attached to the receiving frame 19 and one of the heads 10 is rotated. By meshing the gears 22 attached to the rotation shafts of the heads 10 with each other, each head 10 rotates in the opposite direction. By arranging the plurality of heads 10 in a staggered manner as in the example in which the brushes 11 shown in FIG. 12 are attached, it is possible to eliminate gaps between brushing and cutting.

By determining the number of support rods 9 according to the cross-sectional shape and size of the target flue, and adjusting the rotation angle of the receiving frame 19 relative to the joint 27 and the rotation angle of the joint 27 relative to the support rod 9, The entire circumference of the flue inner wall 2 can be covered with a plurality of brush groups and cutting blade groups. Brushing and cutting in the flue axis direction is performed by moving the carriage 3.
FIG. 14 shows an arrangement example in which brushing is performed over the entire inner wall 2 of the arched flue. In this case, as shown in FIG. 10, the brush groups and cutting blade groups attached to the two support rods 9 are arranged in a staggered manner by changing the length of the support rods 9 provided adjacent to each other.

Further, the support rod 9 can be swung in the flue circumferential direction to perform brushing and cutting over the entire circumference. An example of rocking is shown in FIG. A swing rod 34 is pivotally supported at the tip of the support rod 9, and the brush 11 or the cutting blade 14 is attached to the tip of the swing rod 34. Further, the disk 32 is fixed to the support rod 9, and a protrusion 33 is provided in the vicinity of the periphery of the disk 32. The protrusion 33 is loosely fitted in a long hole formed in the swing rod 34 and the disk 32 is rotated, so that the swing rod 34 swings between the solid line and the broken line as indicated by an arrow.
FIG. 16 shows an example in which two rocking rods 34 are arranged side by side on the support rod 9. In this case, the two discs 32 are engaged with each other as gears, and by rotating one of the two discs, the two oscillating rods oscillate in opposite directions, so that more stable work can be performed.
When the support rod 9 is swung, by arranging the head 10 attached with the brush 11 and the head 10 attached with the cutting blade 14 on the same receiving frame 19, more effective cleaning using brushing and cutting can be achieved. Yes.

In the practice of the present invention, the positioning and running of the carriage 3, the revolution and swinging of the support rod 9, the opening and closing of the umbrella-shaped support rod 9, the in-plane rotation of the head 10, etc. It can be performed under conditions set in advance according to the shape. Then, the state of the cleaning work can be observed with an external monitor and manually operated under more appropriate conditions.
In addition, after cleaning by brushing or cutting, or after observing the flue inner wall 2 after performing high-pressure water injection with a camera, there is a contaminated residual part, and it is necessary to clean the part again, It is effective to adopt appropriate means and conditions according to the situation.

Therefore, it is convenient to arrange the support rods 9 to which the brush 11, the cutting blade 14, and the nozzle 17 for high-pressure water injection are attached in combination. For example, when high-pressure water injection is performed as the recleaning means, one or several dedicated support rods 9 each equipped with a nozzle 17 dedicated to recleaning are separately arranged and rotated around a flue axis to a predetermined position. And sprayed to the contamination remaining part at that position.
Since a normal flue has an upward gradient from the furnace toward the chimney, the water containing the sludge generated in the cleaning operation flows toward the furnace and flows out from the work opening. In carrying out the present invention, the effluent water can be recovered, the sludge removed, and reused for high-pressure water injection and washing.

  FIG. 17 shows an embodiment. The flue 1 has a circular section with a diameter of about 2 m, a furnace on the right side, a chimney on the left side, and a slight upward slope from right to left. The apparatus of the present invention was inserted into the flue from the upper opening 45, and high-pressure water injection was performed while running toward the right. Wheels 4 of the trolley 3 are made of pneumatic rubber tires and are provided in the flue axial direction, two in the flue axis direction, and three in the flue circumferential direction at equal intervals as shown in FIG. Positioned in the center of the flue cross section. The wheel 4 was rotated by a hydraulic motor and traveled toward the lower opening 55. A hydraulic unit comprising a hydraulic pump, a three-phase motor for driving the pump, an operating oil tank and operating oil, a hydraulic motor group and a hydraulic cylinder group was mounted on the carriage 3 and controlled by remote control. The power of the three-phase motor was supplied from an external power supply box 48 through a power cable 47. For the control, the semi-wireless system, that is, the power cable 47 can be used as a carrier medium for control information.

A frame 7 is attached to the main rod 6 of the carriage 3, and the support rods 9 are arranged radially as shown in FIG. 9 and the nozzle 17 attached to the head 10 at the tip is used as the main nozzle 35, and rotates around the axis of the main rod 6. High-pressure water injection was performed. In addition, one sub nozzle 36 was attached in the opposite direction with the main nozzle 35 interposed therebetween.
While rotating the frame 7 while the carriage 3 is stopped, high pressure water with a predetermined pressure is inclined from the main nozzle 35 as shown in FIG. 9 and sprayed to the inner wall 2 to remove the surface contamination layer by the grinding effect of the high pressure water. did. Thereafter, the carriage 3 was moved to perform high-pressure water injection on the adjacent position of the flue inner wall 2 and this was repeated. Further, the inner wall 2 after the main nozzle 35 was jetted was observed with an external monitor through a camera attached to the carriage 3, the position of the sub nozzle 36 was adjusted toward the remaining contamination portion, and jetted again.

  The contaminated water containing the removed sludge flows to the right and flows out of the lower opening 56 into the recovery tank 51 with a recovery hose. The supernatant water in which the sludge 52 is precipitated is passed through a filter, and the water supply tank 50 and After passing through the high pressure tank 49, the high pressure hose 46 led to the main rod 6 and supplied to the nozzles 35 and 36. When the water in the water supply tank 50 fell below a predetermined level, the tank 50 was supplied with water. The power supply box 48 and the tanks 49 to 52 surrounded by the one-dot chain line in FIG. 17 are temporarily installed in the temporary space 53 only during the cleaning operation. A dedicated vehicle may be used as the temporary space 53. Monitors and operating equipment can also be provided in the dedicated vehicle.

It is a side view which shows the example of this invention apparatus. It is a front view which shows the example of the trolley | bogie in this invention. It is a front view which shows another example of the trolley | bogie in this invention. It is a front view which shows the example of arrangement | positioning of the brush in this invention. It is a partial cross section figure which shows the example of the support rod in this invention. It is a partial cross section figure which shows the example of the rotation mechanism of the flame | frame in this invention. The example of the cutting blade in this invention is shown, (a) is a side view (b), (c) is a top view. It is a front view which shows the example of the brush in this invention. It is a front view which shows the example of the high pressure water injection nozzle in this invention. It is a side view which shows the example of the support rod arrange | positioned in the umbrella-bone shape in this invention. (A), (b) is a side view which shows the operation example of the slider in this invention. It is a top view which shows the example of arrangement | positioning of the some brush in this invention. It is a front view showing an example of rotation operation of a plurality of brushes in the present invention. It is a front view which shows the example of the support rod arrange | positioned in the umbrella-bone shape in this invention. It is a front view which shows the rocking | fluctuation operation example of the support rod in this invention. It is a front view which shows another example of rocking | fluctuation operation | movement of the support rod in this invention. It is explanatory drawing which shows the usage example of this invention apparatus.

Explanation of symbols

1: flue 2: flue inner wall 3: bogie 4: wheel 5: coil spring 6: main rod 7, 8: frame 9: support rod 10: head 11: brush 12: insertion rod 13: spring 14: cutting blade 15 : Arm 16: Cylinder 17: Nozzle 18: High pressure water 19: Receiving frame 20: Lever 21: Slider 22: Gear 23: Flange 24: Bolt 25: Bolt nut 26: Motor 27: Joint 28, 29: Spring 30: Stopper 31 : Long hole 32: Disc 33: Projection 34: Oscillating rod 35: Main nozzle 36: Sub nozzle 37: Forward rotation shaft 38: Reverse rotation shaft 39: Motor 40: Holding frame 41: Inner cylinder 42, 43, 44: Bevel gear 45: Upper opening 46: High pressure hose 47: Power cable 48: Power supply box 49: High pressure tank 50: Water supply tank 1: recovery tank 52: sludge 53: Temporary Space 54: return hose 55: lower opening

Claims (8)

  By pushing each wheel of the bogie that has three or more wheels in the circumferential direction of the flue against the inner wall of the flue, the bogie is positioned at the center of the flue cross section and travels, from the bogie toward the flue inner wall A method for cleaning a flue, characterized in that the inner wall of the flue is cleaned by one or more of brushes, cutting blades, and high-pressure water jet nozzles attached to the heads of a plurality of support rods arranged radially.   2. The smoke according to claim 1, wherein one or both of a brush and a cutting blade are attached to a head of a support rod having elasticity arranged radially in the shape of an umbrella, and pressed against the inner surface of the flue while rotating. How to clean the road.   The method for cleaning a flue according to claim 1 or 2, wherein each support rod is provided with a plurality of heads.   The method of cleaning a flue according to any one of claims 1 to 3, wherein each support rod is rotated or rocked in the flue circumferential direction.   It comprises a carriage, wheels and support rods disposed on the carriage, one or more of brushes, cutting blades, high-pressure water injection nozzles attached to the head of the support rod, and carriage running means, and the wheels are in the flue circumferential direction. Smoke is characterized in that three or more are arranged radially from the carriage, each wheel is provided with a pressing means to the inner wall of the flue, and a plurality of support rods are arranged radially toward the inner wall of the flue. Road cleaning equipment.   On the main rod in the flue axis direction attached to the carriage, elastic support rods are arranged radially in the shape of an umbrella, and sliders and levers for opening and closing the support rod in the shape of an umbrella are provided. 6. The flue cleaning apparatus according to claim 5, wherein one or both of the brush and the cutting blade are attached, and a means for rotating the brush and the cutting blade and a means for pressing against the inner wall of the flue are provided.   The flue cleaning apparatus according to claim 5 or 6, wherein each support rod is provided with a plurality of heads.   The flue cleaning apparatus according to any one of claims 5 to 7, further comprising a rotating means for rotating each support rod in the circumferential direction of the flue or a swinging means for swinging.

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