JP2002257320A - Work method for removing soot adhering to wall face of burner, incinerator, or chimney - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work method for removing soot adhering to the wall face of a burner, an incinerator, or a chimney, which suppresses the cost of dumping by lessening the quantity of blast material to be dumped with the soot, and suppresses the cost more by enabling the blast to be reused, and materializes the work where attention is paid to environment by lessening the quantity of dumped industrial waste. SOLUTION: Quartz sand (b) where shot blast is performed is cast onto a sieve 3, the soot and the sand are sieved while being washed by water jet, and the quartz sand (b) from which the soot is removed is recovered on the sieve.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION In the present invention, soot must be removed from a soot-adhered wall such as an inner wall of a flue such as a chimney or an inner wall of a combustion chamber by shot blasting, and the soot must be disposed of as industrial waste. The present invention relates to a method for removing soot adhering to a wall of a combustion furnace, an incinerator, and a chimney with a reduced amount of blast material, and a device for separating and recovering soot from blast material.

[0002]

2. Description of the Related Art Conventionally, in order to remove soot adhering to the inner wall of a flue such as a chimney or the inner wall of a combustion chamber,
Shot blast is often used. In shot blasting, a fine blast material is sprayed on a processing surface by air. When soot is removed by this shot blasting, the soot is separated from the wall surface so as to be scraped off by the blast material or adhered to the blast material and separated from the wall surface. In recent years, soot from factories, power plants and incineration plants has to be disposed of as industrial waste due to environmental considerations. Also, the blasted material with soot had to be disposed of as industrial waste. Especially in a large chimney etc., the blasting material to be used ranges from several t (ton) to several tens t (ton), so that the cost is large,
The work was also difficult. Also, if the blast material with soot attached is reused, the blast material combined by soot and clumped up may be clogged by the shot blasting device,
The soot was re-adhered to the wall and could not be reused.

[0003]

The problem to be solved by the present invention is to solve these conventional problems, reduce the amount of blast material to be discarded with soot, suppress the cost of disposal, and reduce the cost of blasting. A method for removing soot adhering to the walls of combustion furnaces, incinerators, and chimneys that can reduce costs by further reusing materials and reduce the amount of industrial waste to be made environmentally friendly. And a device for separating and recovering blast material and soot.

[0004]

Means for Solving the Problems The constitution of the present invention which has solved the above-mentioned problems is as follows: 1) A granular blast material is sprayed on a wall surface to which soot is attached by a shot blasting device, and soot is separated from the wall surface by the blast material. The soot and the blasted material with soot adhering are collected and put on a sieve. The blast material from which the blast material has been removed is collected from the top of the sieve, the soot under the sieve is separated from the water with a separation filter, soot is collected and discarded, and the blast material from which the soot adhering has been washed away is collected, and the blast material is recycled. Method for removing soot adhering to the walls of combustion furnaces, incinerators, and chimneys that can be used 2) The combustion furnace and incinerator according to 1) above, wherein the blast material of the shot blast is silica sand・ Working method for removing soot adhering to the wall of the chimney 3) Provide a cylindrical casing into which blast material is injected from above, and sieving the blast material so as to remain on the sieve so as to partition the inside of the casing up and down A separating filter for separating water and soot is provided below the sieve; a water discharging means is provided at a lower end portion of the casing below the separating filter; water jetting means for jetting water onto the sieve is provided; Attach a shaker, put the soot and soot-adhered blast material on the sieve, spout water toward the soot and soot-adhered blast material on the sieve, sieving while washing, and wash off the adhering soot A blast material and soot separation and recovery device that enables the blast material to be reused by collecting the blast material.

[0005]

According to the present invention, the blast material of the shot blast from which the soot on the wall surface has been removed is collected and washed with water on a sieve. By sifting while washing with water, soot adhering to the blast material is separated and passed through the sieve of the sieve, so that the blast material separated from the soot can be collected, soot is collected by a separation filter and water is passed. The soot separated from the water can be collected, the blast material separated from the soot can be reused, and the amount of the blast material to be discarded together with the soot is reduced. If the blast material is silica sand, use silica sand that is inexpensive and can provide a sufficient effect. In the case where a sieve and a separation filter are provided in a cylindrical casing and the blast material and soot are separated and collected, the blast material with soot is applied to the sieve in the casing, and the soot is washed while being washed with water jetting means. Activate the vibrator to screen and separate the soot and blast material to recover the soot-free blast material so that it can be reused.The separation filter under the sieve separates the soot and water. Collect soot for disposal.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The sieve may be of any type, such as wood, metal, resin, etc., but is preferably one capable of treating a large amount at a time. The sieve has a size such that the blast material can be left on the sieve. Are preferred. Examples of the blast material include sand-like materials such as silica sand, glass pieces, glass balls, steel balls, and granular resins. Any suitable material may be used as necessary. The soot may include ash after incineration, or the water that has passed through the separation filter may be further left to precipitate fine ash. The present invention may be used for any wall surface to which soot is attached. Further, the wall surface includes a ceiling surface and a floor surface.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described with reference to the drawings. The embodiment shown in FIGS. 1 and 2 is an example of a method for removing soot adhering to a wall of a combustion furnace, an incinerator, or a flue in which soot on a chimney inner surface is used to remove shot blast using silica sand as a blast material. This is an example of an apparatus for separating and recovering blast material and soot in which a blast material and soot are separated and a soot and water are separated by a sieve in a casing and a separation filter. FIG. 1 is an explanatory view of a method for removing soot adhering to a wall surface of a combustion furnace, an incinerator, and a chimney of the embodiment and a device for separating and recovering blast material and soot. FIG. 2 is a diagram illustrating a method for removing soot adhering to the walls of a combustion furnace, an incinerator, and a chimney according to the embodiment. In the figure, 1 is a blast material and soot separation and recovery device, 2
Is a casing, 2a is a blast material recovery port, 2b is a soot discharge port, 2c is a water discharge port, 2d is a blast material input port, 3 is a sieve, 4 is a separation filter, 5 is a water ejection device, 6 is a shaker, 7 is a blast material recovery container, 8 is a soot storage container, 9 is a water recovery container, 11 is a work gondola, 12 is a shot blast device, 13 is a winch device, 13a is a wire,
4 is a guide plate, 15 is a tone, 16 is a pulley, 20 is a chimney, 2
0a is a flue, 20b is an opening, 20c is a steel shell, 20d is a refractory layer, b is silica sand used as a blast material, c is soot,
h is a person and w is water.

In the method for removing soot adhering to the walls of a combustion furnace, an incinerator and a flue according to the embodiment, the apparatus 1 for separating and recovering blast material and soot is connected to the opening 20b at the lower end of the chimney 20. Provided. The apparatus 1 for separating and recovering blast material and soot is provided with a vertically long tubular casing 2 as shown in FIG. 1 and a sieve 3 so as to partition the inside of the casing 2 up and down at a predetermined position. The size of the sieve of the sieve 3 is set to be smaller than the silica sand b used as a blast material. An opening is provided in the side surface of the casing 2 on the side of the sieve, and a passage for discharging diagonally downward is provided to form a blast material recovery port 2a. A blast material recovery container 7 is provided below the blast material recovery port 2a. Further, the sieve 3 is provided so as to be inclined at a small angle toward the blast material collecting container 7. Next, a separation filter 4 is provided so as to partition the inside of the casing 2 below the sieve up and down. The separation filter 4 is a very fine filter and can filter out soot and ash.
An opening is provided on the side surface of the casing 2 on the side of the separation filter 4, and a passage for discharging diagonally downward is provided, which is a soot discharge port 2b. A soot container 8 is provided below the soot outlet 2b. Further, the separation filter 4 is provided so as to be inclined at a small angle toward the soot storage container 8. The lower end portion of the casing 2 is formed in such a shape that the diameter becomes smaller toward the lower side, and a passage is provided from the lower end of the squeezed shape to a predetermined position to form a water discharge port 2c. A water recovery container 9 is provided below the water outlet 2c. The upper end of the casing 2 is provided with a disk-shaped upper surface.
A water jetting device 5 for sending water at a predetermined pressure is provided outside of the casing 2, and a jet port of the water jetting device 5 is provided so as to protrude into the inside from the upper surface of the casing 2 so that water can be jetted onto the sieve 3. I do. Next, a vibrator 6 that is driven to vibrate is provided at two locations on the outer periphery of the casing 2 on the sieve and on the side of the separation filter 4.

The chimney 20 has a refractory layer 20d provided inside a long cylindrical steel shell 20c. The lower end of the chimney 20 has an opening 20 for communicating an internal flue 20a with the outside.
b is provided. Next, at a predetermined height position of the chimney 20,
5 is installed so as to bridge over it, and a pulley 16 is provided on the tone 15. Next, a winch device 13 is provided outside the chimney 20,
The wire 13a that is wound and sent out by the winch device 13 is engaged with the pulley 16 of the tone 15 and turned into the flue 20a.
The work gondola 11 that can move up and down the work gondola 11a is attached, and the work gondola 11
To be able to go up and down. The work gondola 11 is provided with a shot blast device 12 for blowing a granular blast material with air. Next, a guide plate 14 is provided at the lower end of the flue 20a of the chimney 20 so as to incline the flue 20a. The inclination of the guide plate 14 is guided to the blast material inlet 2d obliquely downward.

In this embodiment, in order to remove soot from the chimney 20, an operator rides on the working gondola 11 and takes up and sends out the wire 13 a by the winch device 13 so as to be at a predetermined height position. The gondola 11 is raised and lowered. Next, the shot blasting device 12 is operated so that the particles of the silica sand b used as the blast material are blown by air, and the particles are applied to the inner surface of the chimney to which the soot c is attached. The soot c separates from the wall surface and falls so as to be scraped off by the blown silica sand b, and also separates from the wall surface by attaching to the blown silica sand b and falls together with the attached silica sand b. Thus, the soot c attached to the inner wall surface of the chimney 20 is removed. The sprayed silica sand b and soot c fall down in the flue. Flue 2
Since the inclined guide plate 14 is provided at the lower end of the casing 2a, the fallen silica sand b and soot c are received by the upper surface of the guide plate 14 and move obliquely downward by their own weight, whereby the casing 2 Moves from the blast material inlet 2d to the inside of the casing, and is positioned on the sieve 3.
Water is spouted by the water spouting device 5 onto the quartz sand b and soot c located on the sieve 3. The soot c washed out by the jetted water and the soot c separated from the silica sand b by the washing out pass through the sieves of the sieve 3 and flow down together with the water. Further, the sieve 3 is vibrated by the vibrator 6 through the casing 2, so that the soot falls by vibration so that the soot can be sieved.
Soot c rubs or hits each other, resulting in silica sand b
And falls down the sieve. The silica sand b separated from the soot c in this manner gradually moves due to the small inclination of the sieve 3, and the blast material collection port 2
a into the blast material collection container 7 and stored therein. Thereafter, if the silica sand b recovered in the blast material recovery container 7 is dried, it can be reused because it is separated from soot. When the soot flows downward from the sieve 3, the water falls on the separation filter 4. The separation filter 4 causes only water to fall downward by the minute filter, leaving soot and ash on the filter. Soot and ash on the filter are separated
Is gradually inclined by the vibration caused by the transmission of the vibration of the vibrator 6 to the separation filter 4, and is moved from the soot discharge port 2b into the soot storage container 8 to be stored therein.

The water flowing down the separation filter 4 is:
From the lower end of the casing 2, the water flows out into the water recovery container 9 through the water discharge port 2c and is stored. The discharged water may contain fine soot and ash. In such a case, the water recovery container 9 storing the drained water may be left as it is, and fine soot and ash may be precipitated to reuse the top. As described above, in the present embodiment, it is not necessary to soot and dispose of the blast material, so that the amount of industrial waste to be discarded can be reduced to about 1/10 as compared with the conventional case, and the disposal cost can be greatly reduced. It is also favorable for the environment. In the case of a large chimney, this effect is very large because silica sand is used as a blast material from several t (ton) to several tens t (ton). Also,
Since this process can be performed with almost no human hand, the burden on the operator can be reduced. In addition, the amount of silica sand used as a whole can be reduced because it is recycled and circulated, and the cost can be suppressed.

FIG. 3 shows another example of the method for removing soot adhering to the walls of a combustion furnace, an incinerator and a chimney and a device for separating and recovering blast material and soot according to the embodiment. In the embodiment, the blast material and soot separation / recovery device were connected to the lower end of the chimney, but in another example of the embodiment as shown in FIG.
The blast material to which soot and soot adhere is once collected, and the upper surface of the casing 2 is opened so that the blast material to which soot and soot adhere is thrown in from above the casing 2. As described above, the versatility may be provided so as to be applicable to various types of devices having a wall surface to which soot is attached, such as a combustion furnace, an incinerator, and a chimney.

[0013]

According to the present invention, the amount of blast material to be discarded together with soot is reduced, thereby reducing the cost of disposal.
A method for removing soot adhering to the walls of combustion furnaces, incinerators, and chimneys by reducing the amount of industrial waste that can be reused by reducing the amount of industrial waste and making it more environmentally friendly. It can be used as a material and soot separation and recovery device. When the blast material is silica sand, the cost is suppressed and soot can be removed reliably.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a method for removing soot adhering to a wall surface of a combustion furnace, an incinerator, and a chimney and an apparatus for separating and recovering blast material and soot according to an embodiment.

FIG. 2 is an explanatory diagram of a method for removing soot adhering to wall surfaces of a combustion furnace, an incinerator, and a chimney according to an embodiment.

FIG. 3 is an explanatory view of another example of a method of removing soot adhering to a wall surface of a combustion furnace, an incinerator, and a chimney of the embodiment and a device for separating and recovering blast material and soot.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blast material and soot separation and recovery apparatus 2 Casing 2a Blast material recovery port 2b Soot discharge port 2c Water discharge port 2d Blast material input port 3 Sieve 4 Separation filter 5 Water jetting device 6 Exciter 7 Blast material recovery container 8 Soot storage Container 9 Water recovery container 11 Work gondola 12 Shot blast device 13 Winch device 13a Wire 14 Guide plate 15 Tone 16 Pulley 20 Chimney 20a Flue 20b Opening 20c Iron shell 20d Fireproof layer b (used as blast material) c soot h people w water

Claims (3)

[The claims] 1. A shot blasting apparatus is used to spray a granular blast material onto a soot-adhered wall surface, remove the soot from the wall surface by using the blast material, and collect the exfoliated soot and the soot-adhered blast material. Sifted into the sieve and sifted by squirting water toward the soot and the blasted material with the soot on it, collecting the blasted material from which the soot has been removed, and removing the soot from the sieve. Is separated from the water by a separation filter, soot is collected and discarded, and the blast material that has washed away soot that has adhered is collected to enable reuse of the blast material in a combustion furnace, incinerator,
A method of removing soot from the chimney wall. 2. The method according to claim 1, wherein the blast material of the shot blast is silica sand. 3. A cylindrical casing into which a blast material is introduced from above, and a sieve for sifting the blast material so as to remain on the sieve is provided so as to partition the inside of the casing up and down, and separation for separating water and soot. A filter is provided below the sieve, water discharging means is provided at the lower end of the casing below the separating filter, water jetting means for jetting water onto the sieve is provided, and a vibrator for vibrating the sieve is attached, soot and soot. The blasted material is put on the sieve, sifted while squirting water toward the soot on the sieve and the blasted material with the soot, and the blasted material washed off the soot is collected. A blast material and soot separation and recovery device that enables the reuse of materials.