CN113557389A - Multi-pipe type through-flow boiler - Google Patents

Multi-pipe type through-flow boiler Download PDF

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Publication number
CN113557389A
CN113557389A CN201980093884.0A CN201980093884A CN113557389A CN 113557389 A CN113557389 A CN 113557389A CN 201980093884 A CN201980093884 A CN 201980093884A CN 113557389 A CN113557389 A CN 113557389A
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China
Prior art keywords
water
combustion chamber
boiler
combustion
tube
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Pending
Application number
CN201980093884.0A
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Chinese (zh)
Inventor
猪野忠行
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Ino Yoshiyuki
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Ino Yoshiyuki
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Publication of CN113557389A publication Critical patent/CN113557389A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B29/00—Steam boilers of forced-flow type
    • F22B29/06—Steam boilers of forced-flow type of once-through type, i.e. built-up from tubes receiving water at one end and delivering superheated steam at the other end of the tubes
    • F22B29/061—Construction of tube walls
    • F22B29/062—Construction of tube walls involving vertically-disposed water tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/02—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes
    • F22B21/20—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from substantially straight water tubes involving sectional or subdivided headers in separate arrangement for each water-tube set
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/22—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/22—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight
    • F22B21/30—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes of form other than straight or substantially straight bent in U-loop form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • F22B21/346—Horizontal radiation boilers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • F22B21/36—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers involving an upper drum or headers mounted at the top of the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B21/00—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically
    • F22B21/34—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers
    • F22B21/36—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers involving an upper drum or headers mounted at the top of the combustion chamber
    • F22B21/366—Water-tube boilers of vertical or steeply-inclined type, i.e. the water-tube sets being arranged vertically or substantially vertically built-up from water tubes grouped in panel form surrounding the combustion chamber, i.e. radiation boilers involving an upper drum or headers mounted at the top of the combustion chamber involving a horizontal drum mounted in the middle of the boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
    • F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/001—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space spraying nozzle combined with forced draft fan in one unit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/02—Regulating fuel supply conjointly with air supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2202/00—Liquid fuel burners

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

In the multi-tubular once-through boiler, a configuration is obtained in which the regeneration oil and the waste solvent can be used as combustion gas for generating consumed steam, and cleaning of the water pipe can be easily performed. In a multi-pipe type cross-flow boiler for heating and evaporating boiler water in water pipes to take out consumed steam, a combustion chamber (9) is in a cylindrical shape extending along a horizontal direction, each water pipe is in an arc shape arranged on the left and right sides of the combustion chamber (9), the left and right water pipe rows arranged in the combustion chamber (9) are respectively connected by a linear left and right upper collecting pipe (1) arranged at the upper end and a linear left and right lower collecting pipe (2) arranged at the lower end, and a cover body (door) (22) is formed at one end side facing the combustion chamber (9), the multi-pipe type cross-flow boiler is provided with a burner (10) for supplying combustion gas to the combustion chamber (9), and the multi-pipe type cross-flow boiler comprises: a regeneration oil supply unit that supplies regeneration oil to the combustor (10); a waste solvent supply unit that supplies a waste solvent to the combustor (10); a jet air supply unit; a combustion air supply unit; and a control section that controls supply of the regeneration oil, the waste solvent, the jet air, and the combustion air.

Description

Multi-pipe type through-flow boiler
Technical Field
The present invention relates to a multi-tube type cross-flow boiler that generates steam by heating a plurality of water tubes, and more particularly to a structure of a multi-tube type cross-flow boiler that can use reclaimed oil as fuel.
Background
For example, as shown in fig. 10 and 11 disclosed in patent document 1, in a multitubular tubular boiler, a plurality of water tubes are arranged in a vertical direction in a cylindrical combustion casing having upper and lower bottoms, an annular upper header 1 and a lower header 2 are connected by two rows of water tubes, i.e., an inner water tube row 3 and an outer water tube row 4, respectively, and the adjacent inner water tube row 3 and the adjacent outer water tube row 4 are sealed (sealing fins 8).
Further, the inner water tube row 3 is partially opened (inner flue 5) to form a combustion gas passage 7 between the inner water tube row 3 and the outer water tube row 4, thereby supplying boiler water from the lower header 2 to the water tubes.
In the above configuration, the following configuration is provided: fuel is supplied to and burned by a burner 10 provided in the combustion cylinder to generate combustion gas in the combustion chamber 9, and the combustion gas is supplied from the combustion gas passage 7 to the outside of the plurality of water tubes to heat and evaporate boiler water in the water tubes, thereby taking out the steam consumption from the upper header 1.
The combustion exhaust gas passes through the combustion gas passage 7 and the outer flue 6, and is discharged from the flue 12 as a combustion exhaust gas having a reduced temperature.
The periphery of the upper header 1 and the lower header 2 is covered with a refractory 13, and the entire combustion liner is covered with a heat insulating material 14.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 2914647
Disclosure of Invention
Problems to be solved by the invention
However, according to the above-described multi-tube tubular boiler, since the combustion chamber 9 is sealed and the cleaning of the inside of the combustion cylinder is difficult, there is a problem that the combustion gas to be burned is limited and waste oil or the like which easily generates ash cannot be used.
Further, impurities contained in water adhering to the inside of the water pipe are cleaned by using a chemical for cleaning, but there is a problem that a sufficient cleaning effect cannot be obtained.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a multi-tube type once-through boiler capable of using waste oil as combustion gas for generating steam-consuming combustion gas and easily cleaning water tubes.
In order to achieve the above object, a multitubular once-through boiler according to the present invention (claim 1) is characterized in that the combustion chamber (9) has a cylindrical shape extending in a horizontal direction, the water tubes have arc shapes arranged on left and right sides of the combustion chamber (9), the water tube rows arranged on left side of the combustion chamber (9) are connected by a linear left upper header (1L) arranged on an upper end and a linear left lower header (2L) arranged on a lower end, and the linear right upper header (1R) arranged on the upper end and the linear right lower header (2L) arranged on the lower end are connected by a linear right upper header (1R) arranged on the upper end and a linear right lower header arranged on the lower end A tube (1R) is connected to a water tube row disposed on the right side of the combustion chamber (9), and a door (cover 22) is formed on one end side facing the combustion chamber (9) in the multi-tube type cross-flow boiler having a burner (10) provided on the outer surface of the door and supplying combustion gas to the combustion chamber (9), the multi-tube type cross-flow boiler comprising: a regeneration oil supply unit (100) that supplies regeneration oil to the combustor (10); a waste solvent supply unit (200) that supplies a waste solvent to the burner (10); an injection air supply unit (300) that supplies injection air for spraying the regeneration oil and the waste solvent in the combustor; a combustion air supply part (400) that supplies combustion air for combusting the regeneration oil and the waste solvent in the combustor; and a control section that controls supply of the regeneration oil, the waste solvent, the jet air, and the combustion air.
The 2 nd aspect is the multi-tube type cross-flow boiler of the 1 st aspect, characterized in that the water tube row is composed of an inner water tube row (3) and an outer water tube row (4), and the water tubes of the outer water tube row (4) are disposed between the water tubes of the inner water tube row (3).
The multi-tube type through-flow boiler according to claim 3 is characterized in that hole portions that can be opened and closed are formed in the front surfaces of the left upper header (1L) and the right upper header (1R) on the side of the door (cover 22) and in the front surfaces of the left lower header (2R) and the right lower header (2R) on the side of the door (cover 22).
The invention according to claim 4 is the multi-tube type cross-flow boiler according to claim 3, wherein the water tube row group consisting of the inner water tube row (3) and the outer water tube row (4) is disposed so that the door (cover 22) side is located lower than the back side of the combustion chamber (9).
Effects of the invention
According to the first aspect of the present invention, the combustion chamber (9) is formed in a cylindrical shape extending in the horizontal direction, and the door (cover body 22) is formed on the side of one end facing the combustion chamber (9), so that the door (cover body 22) can be opened and closed to face the inside, the combustion chamber (9) can be easily cleaned, and waste oil can be used as combustion fuel.
In addition, the regenerated oil and the waste solvent can be mixed in the combustor (10) by adjusting the injection amount by the injection part (102) and the injection part (202), and the combustion can be performed efficiently.
As a result, the reclaimed oil and the solvent waste as the waste agent can be used as fuel, and the cost of fuel cost can be reduced.
According to the second aspect of the invention, the water tubes of the outer water tube row (4) are arranged between the water tubes of the inner water tube row (3), whereby the water tubes can be compactly stored.
According to the aspect 3, the upper header 1 and the lower header 2 are provided with openable and closable holes (screw caps 25), whereby the interior of each of the water pipes using the liquid can be easily cleaned.
According to the aspect 4, by providing an angle to the water tube row group composed of the inner water tube row (3) and the outer water tube row (4), the fluid can be made to flow easily, and the liquid can be prevented from remaining in each water tube at the time of cleaning.
Drawings
FIG. 1 is a front explanatory view of a multi-tube type through-flow boiler showing one embodiment of the present invention.
FIG. 2 is a right side explanatory view of a multi-tube type cross-flow boiler showing one embodiment of the present invention.
FIG. 3 is a left side explanatory view of a multi-tube type through-flow boiler showing one embodiment of the present invention.
FIG. 4 is a structural explanatory view of a peripheral portion of a burner in the multi-tubular flow-through boiler.
FIG. 5 is a front view explanatory of the inner water tube row and the outer water tube row of the multi-tube type cross-flow boiler.
Fig. 6 is a partially sectional explanatory view showing a connection structure between an upper header and inner and outer water tubes of a multi-tube once-through boiler.
FIG. 7 is a side explanatory view showing the inner water tube row and the outer water tubes of the multi-tube once-through boiler.
Fig. 8 is a top explanatory view showing an example of a flow passage of combustion gas in the main body of the multi-tube type once-through boiler.
Fig. 9 is a top explanatory view showing another example of a flow passage of combustion gas in the main body of the multi-tube type once-through boiler.
Fig. 10 is a schematic configuration explanatory view showing a conventional multi-tube type flow-through boiler.
Fig. 11 is a sectional explanatory view taken along line a-a of fig. 10.
Detailed Description
An embodiment of the multitubular through-flow boiler of the present invention will be described with reference to the accompanying drawings.
Fig. 1 to 3 show the external appearance of the multi-tube type tubular boiler, and a lid 22 as a door for opening and closing the front surface side of a main body 20 is rotatably attached to a hinge portion 21, and the hinge portion 21 is attached to a cylindrical main body 20 disposed in the lateral direction. A burner 10 is provided on the outer surface of the cover 22, and fuel is supplied to the burner 10 and burned, thereby generating combustion gas in the combustion chamber 9 inside the main body 20.
The combustion gas generated in the combustion chamber 9 of the main body 20 heats a plurality of water tubes provided inside the main body 20 from outside, thereby heating and evaporating boiler water in the water tubes to generate steam (consumed steam), and is discharged as combustion exhaust gas from the flue 12 provided above the main body 20.
Next, the peripheral structure of the combustor 10, which is a characteristic structure of the present invention, will be described with reference to fig. 4 and 3.
The combustor 10 is provided with: a regenerated oil supply unit 100 that supplies regenerated oil; a waste solvent supply unit 200 that supplies a waste solvent; an injection air supply part 300 which supplies injection air for spraying the regeneration oil and the waste solvent in the combustor 10; and a combustion air supply part 400 that supplies combustion air for combusting the regeneration oil and the waste solvent in the combustor 10.
As the reclaimed oil, used engine oil or the like is used. In the case where the steam generation amount for 1 hour is 2 tons, the regeneration oil supplied from the regeneration oil supply unit 100 is supplied at a flow rate of 25L/H to 90L/H, and the supply amount is adjusted by the fuel control pump 101 and introduced to the injection unit 102.
As the waste solvent, used is a secondary crude oil including waste oil (regenerated edible oil), waste ink, and the like. The waste solvent that can be used as the by-product oil includes all industrial wastes that have been conventionally discarded. The waste ink is, for example, ink to be discarded when the color of printing is changed by the rotary press and ink adhering to the rotary press is cleaned.
In the case where the amount of steam generated in 1 hour is 2 tons, the waste solvent supplied from the waste solvent supply unit 200 is supplied at a flow rate of 20L/H to 50L/H, and the supply amount is adjusted by the fuel control pump 202 according to the type of the waste solvent and is introduced to the injection unit 202.
The high-pressure air (0.6 to 0.7MPa) supplied from the injection air supply unit 300 is branched into two systems, and the pressures thereof are adjusted by the pressure control unit 301 and are guided to the injection unit (compressor) 102 and the injection unit (compressor) 202, respectively.
In the injection part 102, a predetermined supply amount (25L/H to 90L/H in this example) of the regeneration oil and a predetermined pressure (2 kgf/cm) are mixed2～3kgf/cm2) The regeneration oil is atomized and guided into the combustor 10. The supply amount is adjusted according to the kind of the regenerated oil.
The ejection part 202 mixes a predetermined supply amount (20L/H to 50L/H in this example) of the waste solvent with a predetermined pressure (2 kgf/cm)2～3kgf/cm2) The waste solvent is atomized and guided into the burner 10. The supply amount is adjusted according to the kind of the waste solvent.
In the combustor 10, the regeneration oil and the waste solvent are introduced into the main body 20 and burned by the regeneration oil and the waste solvent sprayed in a mist form and combustion air supplied from the air sending unit (blower) 400 through the flow rate control unit 401.
The burner 10 is provided with an ignition unit 500, which is configured to ignite the regeneration oil, the waste solvent, and the combustion air supplied into the burner 10 with LPG gas and then maintain combustion.
According to the above configuration, the supply amount of the reclaimed oil and the waste solvent is adjusted, and the reclaimed oil and the waste solvent are mixed in a sprayed state by the spray part 101 and the spray part 202, whereby the reclaimed oil and the waste solvent can be efficiently combusted in the main body 20.
Since the reclaimed oil and the waste solvent can be used as the boiler fuel, the cost reduction of fuel cost can be realized.
Further, since the carbon dioxide emission amount of the used engine oil used as the regeneration oil is zero converted (converted already when used as the engine oil), the calculation of increasing the carbon dioxide emission amount is not performed even when used as the boiler fuel, and thus the engine oil can be effectively used as the fuel.
Next, the internal structure of the main body 20 of the multi-tube type once-through boiler will be described with reference to fig. 5 to 8.
A cylindrical combustion chamber 9 extending in the horizontal direction is formed in the center of the main body 20, and a plurality of arc-shaped water pipes are arranged so as to surround the combustion chamber 9.
Among the plurality of arc-shaped water tubes, a water tube group disposed on the left inner side of the combustion chamber 9 is used as an inner water tube row 3L, and the upper ends are connected by a linear left upper header 1L and the lower ends are connected by a linear left lower header 2L. Similarly, the water tube group disposed on the right inner side of the combustion chamber 9 is connected to the upper ends by the straight right upper header 1R and the lower ends by the straight right lower header 2R as the inner water tube row 3R. The water tubes constituting the left and right inner water tube rows 3L and 3R are connected to each other by the blocking fin 8.
In addition, the entire body 20 of the multi-tube type tubular flow boiler is covered with the heat insulating material 14.
Further, the combustion chamber 9 provided with the collision wall 30 made of a refractory material having a thickness is formed in the vicinity of the end portion of the inner water tube row 3 where the combustion gas is injected in the main body 20, and the inner annular partition wall 15 is provided between the inner water tube row 3 and the collision wall 30, so that the combustion gas injected from the burner 10 flows backward in its entirety after colliding with the collision wall 30.
Water tubes arranged between the water tubes of the inner water tube row 3 are arranged outside the inner water tube row 3, and the outer water tube row 4 is formed by these water tube groups. The outer water tube rows 4 are respectively disposed outside the left and right inner water tube rows 3, and like the left and right inner water tube rows 3, the upper ends of the left water tube groups are connected to the left upper header 1L, the lower ends thereof are connected to the left lower header 2L, the upper ends of the right water tube groups are connected to the right upper header 1R, and the lower ends thereof are connected to the right lower header 2R. Further, as in the case of the inner water tube row 3, the water tubes constituting the left and right outer water tube rows 4 are connected to each other by the closing fin 8.
On the combustion gas supply side (cover 22 side), an inner flue 5 is formed between the inner wall of the cover 22 and the end water tubes, and a notch (inner flue 5A) is formed in the sealing fin 8 connecting the water tubes of the inner water tube row 3. That is, as shown in fig. 8, notches (hatched portions) are formed in each of the 3 sealing fins 8 from the lid body 22 side.
The notch is formed by 3 openings having the widest notch area on the lid 22 side. This is to facilitate the return of the combustion gas, which has collided with the collision wall 30 and flowed backward, to the vicinity of the lid body 22 by enlarging the cutout portion (see fig. 7) of the burner 10 at a position close to the combustion gas discharge port.
Further, by providing the outer annular partition wall 16 which can be brought into contact with the inner surface of the cover 22 at the end of the inner water tube row 4, the combustion gas flowing backward toward the cover 22 is guided between the inner water tube row 3 and the outer water tube row 4, and flows toward the collision wall 30 on the outer side of the annular partition wall 15.
Water supply ports 23 are provided on the lower surfaces of the left lower header 2L and the right lower header 2R, respectively, and steam discharge ports 24 are provided on the upper surfaces of the left upper header 1L and the right upper header 1R, respectively.
A water tube row group including the inner water tube row 3 (left inner water tube row 3L and right inner water tube row 3R) and the outer water tube row 4 (left outer water tube row 4L and right outer water tube row 4R) is arranged in the main body 20 in an inclined manner so that the cover (door) 22 side is located lower than the back side. The inclination angle is preferably about 5 degrees, for example.
Screw caps 25 are attached to the cover (door) 22 sides of the upper headers 1L and 1R and the lower headers 2L and 2R, respectively. By removing the screw cap 25, the hole portion can be opened in the upper header and the lower header.
The inside of each water pipe can be cleaned by supplying cleaning water from the hole portions on the upper header 1L, 1R side and discharging the cleaning water from the hole portions on the lower header 2L, 2R side. At this time, since the cover (door) 22 is disposed at a lower position than the back side, the water for cleaning the inside of the water pipe can be easily discharged from the holes on the lower headers 2L and 2R side.
According to the above configuration, when water is supplied from the water supply ports 23 of the left lower header 2L and the right lower header 2R, boiler water is supplied to the plurality of water tubes arranged in the circular arc shape, and when combustion gas is supplied from the burner 10 to the combustion chamber 9, the combustion gas from the combustion chamber 9 contacts the inner surfaces (surfaces on the combustion chamber 9 side) of the water tubes of the inner water tube row 3 to heat the boiler water in the water tubes.
The combustion gas rebounds from the collision wall 30 provided at the end of the combustion chamber 9 and returns to the lid 22 side, and as shown in fig. 8, the combustion gas is guided from the inner flue 5 and the cutout (inner flue 5A) to the combustion gas passage 7A between the inner water tube row 3 and the outer water tube row 4, and contacts the inner surface of the inner water tube row 3 and the inner surface of the outer water tube row 4 to heat the boiler water in the water tubes.
The boiler water in the water tubes of the inner water tube row 3 and the outer water tube row 4 is heated to become steam, and is taken out as consumed steam from the steam discharge ports 24 provided in the left upper header 1L and the right upper header 1R, and is consumed at a desired supply location.
The combustion gas is reduced in temperature by heating the boiler water in the water pipe, and is discharged from the flue 12 to the outside.
According to the configuration of the multi-tube type once-through boiler configured as described above, waste oil can be used as combustion fuel of the burner 10.
That is, since the combustion chamber 9 is formed in a cylindrical shape extending in the horizontal direction, the cover (door) 22 can be formed on the side facing one end of the combustion chamber 9, and thus the inside of the combustion chamber 9 can be opened by the opening and closing operation of the cover (door) 22.
Therefore, even when the combustion chamber 9 is contaminated with impurities due to the use of waste oil as fuel for the combustion gas, the removal of impurities can be performed by easily cleaning the inside from the side by opening the combustion chamber 9.
The regeneration oil is injected from the injection unit 102, and the waste solvent is injected from the injection unit 202, and the injection amounts are adjusted to mix in the combustor 10, thereby enabling efficient combustion.
As a result, the reclaimed oil and the solvent waste as the waste agent can be used as fuel, and the cost of fuel cost can be reduced.
Fig. 9 shows another embodiment of the multi-tube type once-through boiler, and is an example in which the position of the notch portion as the inner flue gas port is different from that in fig. 8. That is, in the multi-tube type cross flow boiler of fig. 9, the water tubes of the inner water tube row 3 and the outer water tube row 4 are connected by the blocking fins 8, but cutout portions (inner smoke vents 5B) are formed in the blocking fins 8 at both sides 3 of the combustion gas supply side (cover 22 side) of the outer water tube row 4. The other structure is the same as that of the multi-tube type cross-flow boiler of fig. 5 to 8.
According to this configuration, as shown in fig. 9, the combustion gas ejected from the burner 10 into the combustion chamber 9 and rebounded at the collision wall 30 at the end portion and returned to the cover 22 side is guided from the inner smoke passage 5 to the combustion gas passage 7A between the inner water tube row and the outer water tube row, and is also guided from the cutout portion (inner smoke passage 5B) to the combustion gas passage 7B between the outer water tube row 4 and the outer wall (boiler outer wall) of the main body 20, and contacts the outer side surfaces on both sides of the water tubes of the outer water tube row 4 to heat the boiler water in the water tubes. Therefore, the contact area for heating the water tubes of the outer water tube row by the combustion gas is increased, and therefore the water tubes of the outer water tube row 4 can be heated efficiently.
Description of the reference symbols
1: an upper header; 2: a lower header; 3. 3L, 3R: an inner water pipe row; 4. 4L, 4R: an outer water tube row; 5. 5A, 5B: the inner side is communicated with a smoke hole; 6: the outer side is communicated with a smoke hole; 7. 7A, 7B: a combustion gas passage; 8: a fin for sealing; 9: a combustion chamber; 10: a burner; 12: a flue; 13: a refractory material; 14: a thermally insulating material; 15: an inner annular dividing wall; 16: an outer annular dividing wall; 20: a main body; 21: a hinge portion; 22: a cover (door); 23: a water supply port; 24: a steam outlet; 25: a screw cap (hole portion); 30: a collision wall; 100: a regenerated oil supply unit; 101: a fuel control pump; 102: an injection unit (compressor); 200: a waste solvent supply unit; 201: a fuel control pump; 202: an injection unit (compressor); 300: a jet air supply unit; 301: a pressure control unit; 400: a combustion air supply unit; 401: a flow rate control unit; 500: an ignition section.

Claims (4)

1. A multi-tube type tubular boiler in which both ends of each of water tubes of a plurality of water tubes are communicated with each other to supply boiler water to each water tube, a combustion chamber is formed inside each water tube, and combustion gas from the combustion chamber is supplied to the outside of the plurality of water tubes to heat and evaporate the boiler water in the water tubes, thereby taking out consumed steam,
the combustion chamber is in a cylindrical shape extending along the horizontal direction,
the water pipes are respectively configured in the shape of circular arcs at the left and right sides of the combustion chamber,
the water tube arrays arranged on the left side of the combustion chamber are connected by a linear left upper collecting pipe arranged on the upper end and a linear left lower collecting pipe arranged on the lower end,
a water tube row arranged on the right side of the combustion chamber is connected by a linear right upper header pipe arranged at the upper end and a linear right lower header pipe arranged at the lower end, respectively, and
the multi-tube type cross-flow boiler forms a door at one end side facing the combustion chamber, the multi-tube type cross-flow boiler has a burner provided on an outer side surface of the door and supplying combustion gas to the combustion chamber,
the multi-tube through-flow boiler has:
a regeneration oil supply section that supplies regeneration oil to the combustor;
a waste solvent supply part which supplies a waste solvent to the burner;
an injection air supply section that supplies injection air for spraying the regeneration oil and the waste solvent in the combustor;
a combustion air supply portion that supplies combustion air for combusting the regeneration oil and the waste solvent in the combustor; and
a control section that controls supply of the regeneration oil, the waste solvent, the jet air, and the combustion air.
2. Multi-tube once-through boiler according to claim 1,
the water pipe array is composed of an inner water pipe array and an outer water pipe array, and each water pipe of the outer water pipe array is arranged between each water pipe of the inner water pipe array.
3. Multi-tube once-through boiler according to claim 1,
the upper header and the lower header are provided with a plurality of holes, and the holes are formed in the front surfaces of the left upper header and the right upper header on the door side and the front surfaces of the left lower header and the right lower header on the door side.
4. Multi-tube once-through boiler according to claim 3,
the water tube array group including the inner water tube array and the outer water tube array is disposed so that the gate side is located lower than the back side of the combustion chamber.
CN201980093884.0A 2019-03-15 2019-03-15 Multi-pipe type through-flow boiler Pending CN113557389A (en)

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ES2954770T3 (en) 2023-11-24
US20220170626A1 (en) 2022-06-02
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EP3940292A4 (en) 2022-11-16
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JP7128344B2 (en) 2022-08-30
EP3940292B1 (en) 2023-06-07

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