KR20240004165A - Waste solid raw material boiler cleaning method - Google Patents

Abstract

The present invention includes a first step of moving a cleaning device installed on a cart near the side of the chamber to clean a chamber with a clinker donut stuck inside, a second step of removing the clinker donut while it is installed on the cart, and cleaning. A third step of installing the device on the pulley means, a fourth step of subsequently removing the first remaining clinker donut through a cleaning device connected to the pulley means, and installing a moon scaffold so that the moon scaffold can enter and exit the chamber. It provides a waste solid fuel boiler cleaning method including a fifth step and a sixth step in which a worker boards the scaffolding installed through the fifth step and subsequently removes the remaining second clinker donut using a hand cleaning tool.

Description

Waste solid raw material boiler cleaning method}

The present invention relates to a method of cleaning a waste solid fuel boiler, and to a method of cleaning clinker in the boiler in the shortest and safest possible time using a hydraulic breaker and pulley means.

Generally, in industrial sites such as power plants, steel mills, and oil refineries that use coal-fired boilers, clinker becomes adhered to the wall inside the boiler or around the burner tube.

Waste is stored in a heat recovery chamber (circular chamber) connected to a water-cooled wall connected to the upper part of the vortex generation chamber to vortex the flame generated in the combustion furnace at the bottom of the solid raw material boiler, and a wall formed by a heat transfer pipe on the top of this water-cooled wall. Due to the nature of solid fuel, in which more than 40 to 60% of the components are plastic, various dusts such as foreign substances and yarn generated during combustion coagulate and adhere to the boiler fire wall. This coagulation and adhesion phenomenon significantly reduces combustion efficiency and Clinker is formed. Once clinker generation begins, the generation and adhesion speed rapidly increases, and the completely fixed clinker blocks the combustion gas flow path, inevitably leading to a decline in operating rate and productivity.

In addition, the device for removing clinker is heavy and requires several people to work in shifts during manual work, which causes significant disruption to the stable operation of the facility due to significant loss of manpower and delay in work time (for this reason, power plant trips and reductions). There was also a problem with damage to the bottom ash structure or the fireproof wall within the furnace during operation.

In addition, if the work to remove clinker in the boiler is performed over a long period of time, there is a risk of causing a safety accident due to the dust and ash particles of the clinker, and the dust penetrates the eyes even when wearing safety equipment such as safety glasses and a mask. There was also the problem that inhalation of dust could cause serious harm to workers' lungs, causing pneumoconiosis.

Korean Patent Publication No. 2021-0031059 relates to a clinker crushing device for a bottom ash treatment facility, including a basic frame (10), a left and right rotation supporter (20) rotatably coupled to the basic frame (10), and An intermediate support frame 30 rotatably coupled to the horizontal rotation axis 23a orthogonal to the rotation axis of the left and right rotation support 20 and rotatable up and down, and an upper rear support coupled to the upper rear of the intermediate support frame 30 ( 40), a hammer drill 60 coupled to the intermediate support frame 30, and a blow coupled to the front end of the hammer drill 60 to crush the clinker by the operation of the hammer drill 60. A clinker crushing device of a bottom ash treatment facility is disclosed, which includes a bar (70) to crush and remove clinker generated inside the bottom ash hopper (3).

Korean Patent Publication No. 10-1450433 relates to a boiler clinker removal device, comprising a striking rod 10 made of titanium with a certain length and a spray nozzle 11 for high-pressure injection of coolant at the tip, and the striking rod ( 10) a plurality of anti-slip plates (20) configured at the distal end in the radial direction, and a coolant guide tube (30) configured inside the striking rod (10) to guide coolant supplied from the outside to the spray nozzle (11), A recovery tube 40 configured inside the hitting rod 10 to recover coolant not sprayed through the spray nozzle 11 among the coolant supplied through the coolant guide tube 30, and a back of the hitting rod 10. Disclosing a boiler clinker removal device comprising a rock drill connecting rod (50) coupled to an end, and a striking rod support (60) for supporting and supporting the middle portion of the striking rod (10) at a certain height, there is.

Korean Registered Utility Model Publication No. 20-0463191 relates to a crank crush removal device in a boiler, which includes an installation stand (10) with movable casters (11) installed at the corners of the lower surface and a vertical pipe erected on the upper surface of the installation stand (10). (20) and a vertical moving shaft 30 mounted to be able to slide up and down within the vertical pipe 20, a loader 40 rotatably coupled with a bearing to the upper end of the vertical moving shaft 30, and the loader ( A hydraulic breaker 50 coupled to the upper end of 40) with a pin 51 and a support guide 60 supporting the hydraulic breaker 50; An interlocking chuck 70 installed on the support guide 60 and interlocked with the bit 52 of the hydraulic breaker 50, and a spray pipe 80 mounted on the interlocking chuck 70 to spray air or water. and a hydraulic supply 90 that supplies hydraulic pressure to the hydraulic breaker 50. A crank crush removal device in a boiler is disclosed.

Korean Patent Publication No. 10-1767369 relates to a clincher removal device that is movable in a combustion furnace. A device that removes clincher that is fused to the grate inside a combustion furnace can be used by entering the combustion furnace according to the user's needs. Afterwards, a clincher removal device is disclosed that allows the removal device to be taken out of the combustion furnace to replace parts, and is also movable in the combustion furnace to facilitate smooth transfer.

However, the prior art only describes the device, but does not disclose a cleaning method to solve the problem of having to stop the operation of the boiler to remove dust adhering to the inner wall, so that the generated clinker can be removed in the shortest possible time. There is a need for a cleaning method to safely remove it.

Korea Patent Publication No. 2022-0081880 is Korean Patent Publication No. 10-2488667 Korean Patent Publication No. 2022-0097252 Korean Patent Publication No. 10-2601707

The present invention seeks to solve problems in the prior art and provide a method for cleaning a waste solid raw material boiler.

In order to solve the above problem, the present invention provides a first step of moving the cleaning device installed on the cart near the side of the chamber to clean the chamber in which the clinker donut is stuck, and removing the clinker donut while it is installed on the cart. a second step, a third step of installing the cleaning device using a pulley means, a fourth step of subsequently removing the first remaining clinker donut through a cleaning device installed on the pulley means, and a moon scaffold entering and exiting the chamber. A waste solid fuel boiler that includes a fifth step of installing a hanging scaffold to allow workers to board the hanging scaffold installed through the fifth step and a sixth step of subsequently removing the remaining second clinker donut using a hand cleaning tool. Provides cleaning methods.

Additionally, 20% of the clinker donuts can be removed through the second step.

Additionally, 35% of the first remaining clinker donut can be removed through the fourth step.

Additionally, 45% of the second remaining clinker donuts can be removed through the sixth step.

Additionally, the order of the first to fourth steps may be selectively changed.

Additionally, it may be applicable regardless of whether the chamber is operating or not.

Additionally, the sixth step can be performed while wearing an air suit to prevent damage to the worker due to the temperature inside the chamber.

The present invention can clean clinker in a boiler in the shortest possible time and safely.

Additionally, removal efficiency can be increased by removing clinker from outside and inside the chamber.

Figure 1 is a photograph of a state during and after cleaning to remove clinker inside a chamber according to an embodiment of the present invention.
Figure 2 is a photograph of a cleaning device installed on a pulley means according to an embodiment of the present invention.
Figure 3 is a photograph of a cleaning device connected to/installed on a cart according to an embodiment of the present invention.
Figure 4 is a photograph showing a worker boarding a moon scaffold inside a chamber according to an embodiment of the present invention.
Figure 5 shows the sequence of a cleaning method according to an embodiment of the present invention.
Figure 6 shows the form in which the cleaning device used in the cleaning method is installed on the pulley means in one embodiment of the present invention.
Figure 7 shows a cleaning device used in a cleaning method installed on a bogie according to an embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the attached drawings. However, the attached drawings are only examples for easily explaining the content and scope of the technical idea of the present invention, and the technical scope of the present invention is not limited or changed thereby. Additionally, based on these examples, it will be obvious to those skilled in the art that various modifications and changes are possible within the scope of the technical idea of the present invention.

In addition, terms or words used in this specification and claims should not be construed as limited to their usual or dictionary meanings, and the inventor appropriately defines the concept of terms in order to explain his or her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done. Therefore, the embodiment described in this specification is only one of the most preferred embodiments of the present invention and does not represent the entire technical idea of the present invention, so there are various equivalents and modifications that can replace them at the time of filing the present application. You must understand that it is possible.

The drawings are as follows to show one embodiment of the present invention.

Figure 1 is a photograph of a state during and after cleaning to remove clinker inside the chamber according to an embodiment of the present invention, and Figure 2 is a photograph of a state in which the cleaning device is installed on the pulley means according to an embodiment of the present invention. Figure 3 is a photograph of a cleaning device connected to/installed on a cart as an embodiment of the present invention, and Figure 4 is a photograph showing a worker riding on a scaffold inside a chamber as an embodiment of the present invention. 5 shows the sequence of the cleaning method as an embodiment of the present invention, Figure 6 shows the cleaning device used in the cleaning method as an embodiment of the present invention installed on the pulley means, and Figure 7 shows the order of the cleaning method as an embodiment of the present invention. As an example of this, it shows how the cleaning device used in the cleaning method is installed on the bogie.

The present invention includes a first step of moving a cleaning device installed on a cart near the side of the chamber to clean a chamber with a clinker donut stuck therein, a second step of removing the clinker donut while it is installed on the cart, A third step of installing the cleaning device using a pulley means, a fourth step of subsequently removing the first remaining clinker donut through a cleaning device installed on the pulley means, and installing a moon scaffold so that the moon scaffold can enter and exit the chamber. It provides a waste solid fuel boiler cleaning method including a fifth step and a sixth step in which a worker boards the scaffolding installed through the fifth step and subsequently removes the remaining second clinker donut using a hand cleaning tool.

Additionally, an inspection port may be included on a portion of the side of the chamber.

In addition, in the present invention, the clinker donut is called a clinker donut because the clinker stuck inside the chamber is formed into a ring shape along the inner wall, so it is called a clinker donut. The shape of the donut is not maintained because some of the stuck clinker is removed. However, for convenience, it was referred to as a clinker donut.

Additionally, the first step is to move the device near the chamber, particularly in front of the inspection port of the chamber.

In addition, the second step includes a step 2-1 of opening the inspection hole, a step 2-2 of removing a part of the clinker donut formed at any one of the center of the inspection hole and the inner frame of the inspection hole, and a step 2-2 of removing a part of the clinker donut formed in the center of the inspection hole and the inner frame of the inspection hole. It includes steps 2 and 3 in which the entire area is removed, and a part of the cleaning means is inserted into the inspection hole to remove clinker.

In addition, the third step may include a 3-1 step of separating the cleaning device from the cart, a 3-2 step of connecting and installing the upper side of the cleaning device to the pulley means, and connection with the pulley means. An additional step 3-3 to check may be included.

In addition, the fourth step is step 4-1, in which the worker inserts a part of the cleaning means into the inspection hole to remove the first remaining clinker donut, and the worker uses the cleaning device inserted inside the inspection hole to remove the first remaining clinker donut. It may include step 4-2 of removing part of the and step 4-3 of removing all areas that can be removed while installed on the pulley means.

In addition, the fifth step is to install a hoist and scaffolding on the upper part of the chamber for workers to enter the chamber in order to remove all the second residual clinker donuts remaining after removal through the second and fourth steps. The fifth step may include a 5-1 step of installing a hoist at the top of the chamber and a 5-2 step of moving and connecting the hanging scaffold to the lower part of the hoist installed at the top.

In addition, the 6th step is the 6-1 step in which the worker boards the hanging scaffold installed in the 5th step, and the 6-2 step in which the worker connects one side of the hanging scaffold and the safety means after boarding and performs a safety check. , step 6-3 of adjusting the hanging scaffold to move to the second remaining clinker donut position, step 6-4 of removing the second stage female clinker donut, and step 6-4 of removing all clinker adhered to the inner wall of the chamber. It may include steps 6-5.

Additionally, in the fifth step, the hanging scaffold may be installed to enter and exit through the upper part of the chamber.

In addition, when installing the hanging scaffold, an additional hoist can be installed and used to enter and exit from the top.

Additionally, 20% of the clinker donuts can be removed through the second step.

Additionally, 35% of the first remaining clinker donut can be removed through the fourth step.

Additionally, 45% of the second remaining clinker donuts can be removed through the sixth step.

In addition, the first remaining clinker donut or the second remaining clinker donut only refers to the remaining clinker donut after the second or fourth step, and the order may be changed.

Additionally, the cart used in the second step may include a function that allows the cleaning device to move forward and backward and adjust the angle.

In addition, the direction of the cleaning device can be adjusted in all directions through the pulley means.

In addition, as shown in FIG. 5, the order of steps 1 to 4 may vary depending on the situation, such as the site or inside the chamber.

Additionally, the order of the first to fourth steps may be selectively changed.

Additionally, it may be applicable regardless of whether the chamber is operating or not.

Additionally, the internal temperature of the chamber is 60°C, and an error range of 10°C or more may occur depending on the environment.

Additionally, the sixth step can be performed while wearing an air suit to prevent damage to the worker due to the temperature inside the chamber.

In addition, the simple cleaning device is of a size or shape that allows the operator to operate it with one or both hands, so recoil and hitting may occur.

In addition, for the cleaning method, a waste solid fuel boiler cleaning device including a hydraulic breaker including a handle means for handling on one side and a striking means connected to the handle means of the hydraulic breaker and the other side to strike the stuck clinker. to provide.

In addition, in the cleaning device for removing clinker stuck to the chamber and the inner wall of the chamber for the cleaning method, a hydraulic breaker including a handle means for handling on one side and a handle means of the hydraulic breaker connected to the other side. A striking device including a striking means for hitting the fixed clinker, a bogie capable of transporting and adjusting the upward and downward striking position by combining with the striking device, a pulley means capable of adjusting the striking position in all directions by combining with the striking device, and an upper side of the chamber. A moon scaffold that can move up and down inside and move forward, left, and right toward the internal wall and on which workers can ride, a simple striking device for workers on the moon scaffold to directly remove clinker, and the safety of workers working inside the chamber. It provides a waste solid fuel boiler cleaning device including an air chute for.

In addition, the fixed clinker is fixed to the inner wall of the chamber, and the chamber includes an inspection opening located on the side, and the clinker located on the inspection opening side can be removed first.

In addition, it is connected to the upper side of the hydraulic breaker and includes a pulley means including a chain block including a wire pulley and a first ring on the upper surface so that the striking means strikes in all directions, and a second ring coupled to the first ring, It may include a transfer means including a transfer trolley for moving the chain block forward and backward and a wire for moving the transfer trolley.

In addition, a transport trolley ring coupling means may be additionally included to couple the transport trolley and the second ring.

Additionally, in order for the transfer trolley to be moved via a wire, one or more wheels having balls or grooves may be built into the transfer trolley.

Additionally, since the transfer trolley moves forward and backward, the wire may also be arranged forward and backward.

Additionally, the cleaning device can be used to remove clinker in circular, triangular, square and polygonal chambers, and preferably can be used to remove clinker in circular chambers.

In addition, the striking means includes a guide bar to assist in determining the striking point, a tool guide connecting the guide bar and the striking means, an adapter for combining the hydraulic breaker and the striking means, and a clinker installed at the end of the striking means to physically A waste solid fuel boiler cleaning device including a blow well for separation is provided.

In addition, the adapter can also serve to prevent the striking means from colliding with the hydraulic breaker when striking while moving forward and backward.

Additionally, the striking means may penetrate a portion of the tool guide.

In addition, the tool guide may also serve to prevent the adapter from being separated and thrown out when striking while the striking means moves forward and backward.

Additionally, the handle means may be in a form that can be attached to the operator's body.

Additionally, the handle means may be in the form of a triangular, square, or polygonal panel, and may include grooves or protruding means for the operator to grasp on one or both sides of the panel.

Additionally, the handle means may be made of or added to one side of a cushioning material such as rubber to attenuate vibration transmitted to the operator.

Additionally, the guide bar may be extended above the hydraulic breaker and connected to the wire pulley.

In addition, the wire pulley may include a wire pulley ring, and one side of the guide bar may include one or more perforated guide bar holes so that the wire pulley ring can be hung.

In addition, the guide bar hole can be drilled at an appropriate position in accordance with the center of gravity of the cleaning device, and when formed with a plurality of holes, the wire pulley ring can be selected to be hung at a more efficient position to eliminate clocking.

In addition, either the first ring or the second ring may be in the form of a carabiner, which allows quick coupling.

Additionally, one or more pulleys may be included inside the chain block to adjust the length or distribute the weight of the wire pulley.

In addition, the striking means may be composed of a striking rod and a striking tablet, and the striking rod may be partially or entirely composed of one or more of annular and angled polygons.

In addition, the form of the striking tool may be one or more of a plurality of blades, a harpoon, a bundle, a spear, and a half-moon, but any type may be used as long as it is suitable for removing stuck clinker.

In addition, the hitting rod and hitting well can be appropriately replaced and used depending on the shape, such as the size and length of the chamber.

Additionally, the pulley means may be made of a material to support the weight of the hydraulic breaker.

In addition, the hydraulic breaker may further include a bogie to which it is coupled.

In addition, the bogie includes a bogie body, a bogie transfer handle for transporting the bogie on the top of the bogie body, a hinge bracket located on the top of the bogie and connected to one side of the hydraulic breaker, a link arm coupled to one side of the hydraulic breaker, and the hydraulic breaker. It is connected to the other side of the link arm to which the breaker is coupled and may include an adjustment handle for the angle and vertical movement of the hydraulic breaker.

In addition, the angle and vertical movement of the hydraulic breaker can be easily achieved through organic adjustment of the hinge bracket, link arm, and control handle of the bogie.

In addition, the hinge bracket serves to fix the cleaning device including the hydraulic breaker to the bogie, and the link arm and the adjustment handle serve to adjust the angle and height of the cleaning device.

In order for the striking means of the cleaning device to be directed upward, the center of the link arm is moved toward the operator. Conversely, in order for the striking means to be directed downward, the center of the link arm is moved in the direction of the cleaning device.

Additionally, the cleaning device can be selectively connected to either a pulley means or a cart, and can be connected appropriately depending on the site, situation, and environment required for transportation and movement.

For example, a bogie can be used to reach a place where work is required, and a pulley means can be used to move the work to a place where work is required.

Additionally, the cleaning device can be handled by an operator.

In addition, it may include a hanging scaffold used for the worker's safety, movement, and work.

Additionally, the hanging scaffold may be formed by connecting a plurality of frames.

In addition, the hanging scaffold can be connected to a vertical transport chain on the upper side to enable omnidirectional movement, and forward, left, and right transport wires can be connected to the sides.

In addition, one side of the hanging scaffold may include a control device for moving the hanging scaffold or a control connection means for connection to a control device located externally.

Additionally, the worker can handle the cleaning device while wearing an air suit.

In addition, the air suit forms an air layer inside the suit through an external air storage means, an external air injection means for injecting the external air, and the external air injection means, so that the worker can work safely even when exposed to a high temperature environment.

Additionally, the air suit may be in a form that covers the worker's entire body.

In addition, the cleaning device can be connected to one or more shock absorbing means to relieve shock and a power means to generate power when necessary, so that the device can be driven or operated, and this can be appropriately applied to the cleaning device depending on the usage environment. .

Additionally, in order to remove clinker stuck to the inner wall of the chamber, the cleaning device is moved in front of the inspection hole located on the side of the chamber.

In addition, the clinker is fixed to the inner wall of the chamber in a circular donut shape, and the fixed clinker can be referred to as a clinker donut.

Additionally, the cleaning device is moved through a bogie coupled to one side of the hydraulic breaker.

Additionally, the inspection opening on the side of the chamber includes an inspection opening door.

Additionally, when the inspection door is opened, clinker adhered to the inner wall of the chamber can be confirmed.

Removal begins with the clinker stuck to the inspection hole side.

Clinker removal can be performed using a cleaning device from the center or from the outside based on the center of the inspection hole.

In addition, a cleaning device is used to remove clinker stuck to the inspection hole side, and at this time, it can be used as it is coupled to a bogie for movement.

The cleaning device combined with the bogie removes clinker through a forward and backward reciprocating motion of the striking means coupled to the hydraulic breaker, and adjusts the striking point through organic movement of the hinge bracket, link arm, and control handle of the bogie.

If the clinker on the inspection hole side is removed and the efficiency of clinker removal decreases or a limitation occurs while it is coupled to the bogie, the cleaning device is separated from the bogie and coupled to the pulley means.

When the pulley means and the cleaning device are combined, the hitting point of the cleaning device can be adjusted more flexibly than when it is coupled to the bogie.

Forward and backward movement is possible through the transfer trolley and wire of the pulley means, and the transfer trolley and chain block are connected by a ring to allow 360°C rotation, allowing for more flexible movement.

In addition, after the cleaning device is coupled to the cart and moved to the front of the inspection hole, it can be combined with the pulley means to start removing clinker, which may vary depending on the site situation.

In addition, the first remaining clinker is removed while connected to the bogie using a cleaning device connected to the pulley means, and the clinker is removed deeper and in a wider range front, rear, left and right than when it is coupled to the bogie. can be removed.

In addition, if the efficiency of clinker removal decreases or restrictions occur while coupled to the pulley means, the worker enters the chamber directly and continues the work.

In addition, the worker must use a hanging scaffold to enter and exit the interior.

The hanging scaffold is installed with a hoist at the top of the chamber, and the hanging scaffold can be moved up and down by using a hanging scaffold wire and a hanging scaffold hoist coupling means of the hanging scaffold and the hoist.

In addition, the hanging scaffold hoist coupling means may be in the form of a partially open ring like a hook for the hoist, and may be in the form of an open ring like a circle for the hanging scaffold.

Additionally, the hanging scaffold hoist coupling means may be a carabiner.

In addition, the worker on the hanging scaffold can remove all the clinker inside the chamber by efficiently removing the remaining second residual clinker using the cleaning device installed on the pulley means while moving back and forth and left and right and up and down.

In addition, in the present invention, the cleaning device is a device for removing clinker, the hydraulic breaker of the cleaning device provides power based on hydraulic pressure, the handle means is for the worker to adjust the hydraulic breaker, and the striking means is It includes a striking vehicle that physically strikes the clinker to be removed and a striking means body combined with the hydraulic breaker, and the guide bar assists the operator in assessing the position of the striking means, especially the striking boat, to aim at the removal target. The tool guide serves to fix the striking means, especially the body of the striking means, and the adapter is for combining the hydraulic breaker and the striking means. Additionally, it also serves to prevent the striking means from colliding with the hydraulic breaker, and the bogie It is combined with a cleaning device and used to transport the cleaning device and remove clinker. The bogie body of the bogie becomes the base of the bogie, the bogie transfer handle adjusts the direction when transporting the bogie, and the hinge bracket is used to transport the bogie. It is for fixing the installed cleaning device, the link arm and control handle are for adjusting the angle and height of the cleaning device installed on the bogie, and the hanging scaffold is connected to the hoist installed at the top of the chamber to raise and lower the inside of the chamber. It is installed in a size and shape that a worker can ride on, and is a means that allows the worker to remove clinker from the inside. The worker on the scaffold controls the up and down movement of the scaffold through the up and down transfer chain. , forward, left, and right transport is controlled through forward, left, and right transport wires, and the air suit refers to a work suit in which an internal air layer is formed to prevent the worker from being damaged by the temperature inside the chamber, and the pulley means is installed with the cleaning device to lift it. It includes a transfer means including a wire pulley for height adjustment, a chain block including a first ring, a wire for forward and backward movement, and a transfer trolley including a second ring to enable clinker removal work in the installed state.

Although the present invention has been described in detail through representative embodiments above, those skilled in the art will recognize that various modifications to the above-described embodiments are possible without departing from the scope of the present invention. You will understand.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims described later but also by equivalents to the claims.

Claims (7)

To clean the chamber where the clinker donut is stuck inside,
A first step of moving the cleaning device installed on the cart near the side of the chamber;
A second step of removing the clinker donut while it is installed on the cart;
A third step of installing the cleaning device using a pulley means;
A fourth step of subsequently removing the first remaining clinker donut through a cleaning device installed on the pulley means;
A fifth step of installing the moon scaffold so that the moon scaffold can enter and exit the chamber; and
A waste solid fuel boiler cleaning method comprising a sixth step in which a worker boards the scaffolding installed through the fifth step and subsequently removes the remaining second clinker donut using a hand cleaning tool.
According to paragraph 1,
A waste solid fuel boiler cleaning method in which 20% of the clinker donuts are removed through the second step.
According to paragraph 1,
A waste solid fuel boiler cleaning method in which 35% of the first remaining clinker donut is removed through the fourth step.
According to paragraph 1,
A waste solid fuel boiler cleaning method in which 45% of the second remaining clinker donuts are removed through the sixth step.
According to paragraph 1,
The first to fourth steps are a waste solid fuel boiler cleaning method in which the order can be selectively changed. According to paragraph 1,
A waste solid fuel boiler cleaning method applicable regardless of whether the chamber is in operation.
According to paragraph 1,
The sixth step is a waste solid fuel boiler cleaning method in which the work is performed while wearing an air suit to prevent damage to the worker due to the temperature inside the chamber.