WO2020188625A1 - 多管式貫流ボイラー - Google Patents
多管式貫流ボイラー Download PDFInfo
- Publication number
- WO2020188625A1 WO2020188625A1 PCT/JP2019/010813 JP2019010813W WO2020188625A1 WO 2020188625 A1 WO2020188625 A1 WO 2020188625A1 JP 2019010813 W JP2019010813 W JP 2019010813W WO 2020188625 A1 WO2020188625 A1 WO 2020188625A1
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- WIPO (PCT)
- Prior art keywords
- water pipe
- boiler
- combustion chamber
- combustion
- water
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 163
- 238000002485 combustion reaction Methods 0.000 claims abstract description 70
- 239000000567 combustion gas Substances 0.000 claims abstract description 37
- 239000010887 waste solvent Substances 0.000 claims abstract description 36
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 238000005507 spraying Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 36
- 239000000446 fuel Substances 0.000 description 18
- 239000000779 smoke Substances 0.000 description 13
- 239000002699 waste material Substances 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000003595 mist Substances 0.000 description 3
- 239000010705 motor oil Substances 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000008162 cooking oil Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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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
Definitions
- the present invention relates to a multi-tube once-through boiler that generates steam by heating a large number of water pipes, and more particularly to a structure of a multi-tube once-through boiler that can use recycled oil as fuel.
- a plurality of water pipes are vertically arranged in a cylindrical combustion cylinder with upper and lower bottoms, and an upper ring is formed.
- the pipes 1 and the lower pipes 2 are connected by two rows of water pipes, the inner water pipe row 3 and the outer water pipe row 4, and the adjacent inner water pipe row 3 and the adjacent outer water pipe row 4 are closed (for closing). Fins 8).
- a combustion gas passage 7 is formed between the inner water pipe row 3 and the outer water pipe row 4, and the combustion gas passage 7 is formed from the lower pipe gathering 2. It is configured to supply boiler water to each water pipe.
- fuel is supplied to the burner 10 installed in the combustion cylinder and burned 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 a plurality of water pipes.
- the structure is such that the boiler water in the water pipe is heated and evaporated, and the consumed steam is taken out from the upper pipe gathering 1. Further, the combustion exhaust gas is discharged from the flue 12 as a combustion exhaust gas having a lowered temperature through the combustion gas passage 7 and the outer smoke passage 6.
- the peripheral portions of the upper pipe gathering 1 and the lower pipe gathering 2 are covered with the refractory material 13, and the entire combustion cylinder is covered with the heat insulating material 14.
- the combustion chamber 9 is sealed and the inside of the combustion cylinder is difficult to clean, so that the combustion gas to be burned is limited and waste oil and the like, which easily generate residual ash, etc. There was a problem that it could not be used. Further, impurities contained in water adhering to the inside of the water pipe are cleaned by using chemicals 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 provides a multi-tube once-through boiler capable of using waste oil as a combustion gas for generating consumed steam and easily cleaning a water pipe.
- the purpose is.
- the present invention communicates both ends of each of a plurality of water pipes to supply boiler water to each water pipe, while forming a combustion chamber inside each water pipe to perform the combustion.
- a multi-tube once-through boiler in which combustion gas from a chamber is supplied to the outside of a plurality of water pipes to heat and evaporate the boiler water in the water pipes to take out consumed steam.
- the combustion chamber (9) has a cylindrical shape extending in the horizontal direction.
- Each water pipe has an arc shape arranged on the left and right sides of the combustion chamber (9).
- the water pipe row arranged on the left side of the combustion chamber (9) is connected by a linear left upper pipe alignment (1L) provided at the upper end and a linear left lower pipe alignment (2L) provided at the lower end, respectively.
- the water pipe row arranged on the right side of the combustion chamber (9) is connected by a linear right upper pipe alignment (1R) provided at the upper end and a linear right lower pipe alignment (1R) provided at the lower end, respectively.
- a door (lid 22) is formed on one end side facing the combustion chamber (9), and a burner (10) installed on the outer surface of the door to supply combustion gas to the combustion chamber (9) is provided.
- the second aspect of the present invention is the multi-tube once-through boiler according to the first aspect.
- the water pipe row was composed of an inner water pipe row (3) and an outer water pipe row (4), and each water pipe of the outer water pipe row (4) was arranged between each water pipe of the inner water pipe row (3). It is characterized by.
- a third aspect of the present invention is the multi-tube once-through boiler according to the first aspect.
- a fourth aspect of the present invention is the multi-tube once-through boiler according to the third aspect.
- the water pipe group composed of the inner water pipe row (3) and the outer water pipe row (4) is arranged so that the door (lid body 22) side is lower than the inner side of the combustion chamber (9). It is characterized by that.
- the combustion chamber (9) has a cylindrical shape extending in the horizontal direction, and a door (lid 22) is formed on one end side facing the combustion chamber (9), whereby a door (lid) is formed.
- the inside can be seen by opening and closing the body 22), and the combustion chamber (9) can be easily cleaned, so that waste oil can be used as combustion fuel.
- recycled oil and the waste solvent can be efficiently burned by using the injection unit (102) and the injection unit (202) to adjust the injection amount and mix them in the burner (10).
- recycled oil and waste solvent which are waste agents, can be used as fuel, and fuel costs can be reduced.
- each water pipe in the outer water pipe row (4) between each water pipe in the inner water pipe row (3), a large number of water pipes can be stored compactly.
- the fluid flows easily by angling the water pipe group composed of the inner water pipe row (3) and the outer water pipe row (4), and the liquid remains in each water pipe during cleaning. Can be prevented.
- FIG. 1 to 3 show the appearance of a multi-tube once-through boiler, which is a door that opens and closes the front side of the main body 20 with respect to the hinge portion 21 attached to the cylindrical main body 20 arranged sideways.
- the lid 22 is rotatably attached.
- a burner 10 is installed on the outer surface of the lid 22, and by supplying fuel to the burner 10 and burning it, combustion gas is generated 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 and evaporates the boiler water in the water pipes by heating a plurality of water pipes installed inside the main body 20 from the outside to generate steam (steam consumption). At the same time, it is carried out as combustion exhaust gas from the flue 12 provided above the main body 20.
- the regenerated oil supply unit 100 for supplying the regenerated oil, the waste solvent supply unit 200 for supplying the waste solvent, and the jet air for spraying the regenerated oil and the waste solvent in the burner 10 are supplied to the burner 10.
- the injection air supply unit 300 and the combustion air supply unit 400 for supplying combustion air for burning the recycled oil and waste solvent in the burner 10 are provided.
- By-product oil is used as the waste solvent, and includes gutter oil (recycled cooking oil), waste ink, and the like.
- the waste solvent that can be used as by-product oil includes all the industrial waste of the solvent that was conventionally disposed of.
- the waste ink is ink or the like that is disposed of when cleaning the ink adhering to the rotary press, for example, when the printing color is changed by the rotary press.
- the waste solvent supplied from the waste solvent supply unit 200 is supplied at a flow rate of 20 to 50 L / H when the amount of steam generated per hour is for 2 tons, and the type of waste solvent is further increased via the fuel control pump 202. The supply amount is adjusted according to the above and is guided to the injection unit 202.
- the regenerated oil is sprayed in a mist form by mixing a predetermined supply amount (25 to 90 L / H in this example) of regenerated oil and air of a predetermined pressure (2 to 3 kgf / cm 2 ). It is guided into the burner 10. The supply amount is adjusted according to the type of recycled oil.
- the waste solvent is sprayed in the form of mist by mixing a predetermined supply amount (20 to 50 L / H in this example) of waste solvent and air of a predetermined pressure (2 to 3 kgf / cm 2 ). It is guided into the burner 10. The supply amount is adjusted according to the type of waste solvent.
- the regenerated oil and the waste solvent are injected into the main body 20 by the regenerated oil and the waste solvent injected in the form of a mist and the combustion air supplied from the air delivery unit (blower) 400 via the flow rate control unit 401. Guide and burn.
- the burner 10 is provided with an ignition unit 500, and is configured to maintain combustion after igniting the regenerated oil, waste solvent, and combustion air supplied in the burner 10 with LPG gas.
- the supply amounts of the recycled oil and the waste solvent are adjusted and mixed in the sprayed state using the injection unit 101 and the injection unit 202, so that the combustion can be efficiently performed in the main body 20. Since recycled oil and waste solvent can be used as boiler fuel, fuel costs can be reduced. In addition, the used engine oil used as recycled oil has zero carbon dioxide emissions (already converted when used as engine oil), so even if it is used as boiler fuel, carbon dioxide emissions will increase. Since the calculation is not performed, it can be effectively used as fuel.
- 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 periphery of the combustion chamber 9.
- the water pipe group arranged on the left inner side of the combustion chamber 9 is an inner water pipe row 3L, and each upper end is connected by a linear left upper pipe gathering 1L, and each lower end is a linear left side. Connect with 2L of lower pipe.
- the water pipe group arranged on the right inner side of the combustion chamber 9 is the inner water pipe row 3R, and each upper end is connected by a linear right upper pipe gathering 1R, and each lower end is connected by a linear right lower right pipe gathering 2R. connect. Further, the water pipes constituting the left and right inner water pipe rows 3L and 3R are connected by the closing fins 8. Further, the entire main body 20 of the multi-tube once-through boiler is covered with the heat insulating material 14.
- a combustion chamber 9 in which a collision wall 30 made of a thick fireproof material is installed is formed near the end of the inner water pipe row 3 where the combustion gas is injected inside the main body 20, and the inner water pipe is formed.
- the combustion gas injected from the burner 10 is configured to flow back after colliding with the collision wall 30.
- the outer water pipe row 4 is arranged outside the left and right inner water pipe rows 3, respectively, and like the left and right inner water pipe rows 3, each upper end of the left water pipe group is connected to the left upper pipe gathering 1L, and each lower end is on the left side. It is connected to the lower pipe group 2L, each upper end of the right water pipe group is connected to the right upper pipe group 1R, and each lower end is connected to the right lower tube group 2R. Further, the water pipes constituting the left and right outer water pipe rows 4 are connected by the closing fins 8 as in the inner water pipe row 3.
- an inner smoke vent 5 is formed between the inner side wall of the lid body 22 and the end water pipe, and a closing fin for connecting the water pipes of the inner water pipe row 3 is formed.
- a notch is formed in 8. That is, as shown in FIG. 8, notches (hatched portions) are formed for each of the three closing fins 8 from the lid 22 side. This notch is formed by a three-step opening in which the notch area is the widest on the lid 22 side. This is done by enlarging the notch at the position near the injection port of the combustion gas of the burner 10 (see FIG.
- Water supply ports 23 are provided on the lower surfaces of the left lower pipe gathering 2L and the right lower pipe gathering 2R, respectively, and steam discharge ports 24 are provided on the upper surfaces of the left upper pipe gathering 1L and the right upper pipe gathering 1R, respectively.
- the water pipe group composed of the inner water pipe row 3 (left inner water pipe row 3L and right inner water pipe row 3R) and the outer water pipe row 4 (left outer water pipe row 4L and right outer water pipe row 4R) is relative to the back side.
- the lid body (door) 22 side is inclined and arranged in the main body 20 so as to be in a low position.
- the inclination angle is preferably about 5 degrees, for example.
- Screw lids 25 are attached to the lids (doors) 22 side of the upper pipes 1L and 1R and the lower pipes 2L and 2R, respectively. By removing the screw lid 25, holes can be opened in the upper pipe and the lower pipe. Then, by supplying water for cleaning from the holes on the upper pipes 1L and 1R sides and discharging it from the holes on the lower pipes 2L and 2R, it is possible to clean the inside of each water pipe. At this time, since the lid body (door) 22 side is arranged at a position lower than the back side, the water for cleaning the inside of the water pipe can be easily discharged from the holes on the lower pipe approaching 2L and 2R sides.
- the boiler water is supplied to each of the plurality of water pipes arranged in an arc shape, and the boiler 10 is used.
- the combustion gas is supplied to the combustion chamber 9
- the combustion gas from the combustion chamber 9 comes into contact with the inner side surface (the surface on the combustion chamber 9 side) of each water pipe of the inner water pipe row 3 to heat the boiler water in the water pipe.
- the combustion gas is bounced back to the lid 22 side by the collision wall 30 installed at the end of the combustion chamber 9, and as shown in FIG.
- the inner smoke vent 5 and the notch (inner smoke vent 5A) Is guided to the combustion gas passage 7A between the inner water pipe row 3 and the outer water pipe row 4 and contacts the inner side surface of the inner water pipe row 3 and the inner side surface of the outer water pipe row 4 to heat the boiler water in the water pipe.
- the boiler water in the water pipes of the inner water pipe row 3 and the outer water pipe row 4 is heated to become steam, which is taken out as steam consumption from the steam discharge ports 24 provided in the left upper pipe gathering 1L and the right upper pipe gathering 1R, and is taken out as desired supply location. Is consumed in.
- the temperature of the combustion gas is lowered by heating the boiler water in the water pipe, and the combustion gas is discharged to the outside from the flue 12.
- waste oil can be used as the combustion fuel of the burner 10. That is, by forming the combustion chamber 9 into a cylindrical shape extending in the horizontal direction, the lid (door) 22 can be formed on one end side facing the combustion chamber 9, so that the lid (door) 22 can be opened and closed.
- the operation makes it possible to open the inside of the combustion chamber 9. Therefore, even when the combustion chamber 9 is contaminated with impurities by using the waste oil as the fuel for the combustion gas, the inside can be easily cleaned from the side by opening the waste oil to remove the impurities.
- FIG. 9 shows another embodiment of the multi-tube once-through boiler, and is an example in which the formation position of the notch portion serving as the inner smoke vent is different from that of FIG. That is, in the multi-tube once-through boiler of FIG. 9, the water pipes of the inner water pipe row 3 and the outer water pipe row 4 are connected by the closing fins 8, but the combustion gas supply side (lid body 22) of the outer water pipe row 4 is connected. Notches (inner smoke vents 5B) are formed in the closing fins 8 at three locations on both sides of the side). Other configurations are the same as those of the multi-tube once-through boilers of FIGS. 5 to 8.
- the combustion gas injected from the burner 10 into the combustion chamber 9 and bounced off by the collision wall 30 at the end and returned to the lid 22 side is transferred from the inner smoke vent 5 to the inner water pipe row as shown in FIG. It is guided to the combustion gas passage 7A between the outer water pipe rows, and is also guided from the notch (inner smoke vent 5B) to the combustion gas passage 7B between the outer water pipe row 4 and the outer wall (boiler outer wall) of the main body 20. It contacts the outer surfaces on both sides of each water pipe in the outer water pipe row 4 to heat the boiler water in the water pipe. Therefore, since the contact area to be heated by the combustion gas is increased for each water pipe in the outer water pipe row, each water pipe in the outer water pipe row 4 can be efficiently heated.
- Injection unit (compressor) 200 Waste solvent supply unit 201 .
- Fuel control pump 202 ...
- Injection unit (compressor) 300 ...
- Injection air supply unit 301 ...
- Pressure control unit 400 ...
- Combustion air supply unit 401 ...
- Flow rate control unit 500 ... Ignition unit
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- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
また、内側水管列3における水管間の一部を開口(内側通煙口5)させることで、内側水管列3と外側水管列4の間に燃焼ガス通路7が形成され、下部管寄せ2から各水管にボイラー水を供給するように構成されている。
また、燃焼排ガスは、燃焼ガス通路7及び外側通煙口6を通って、温度が低下した燃焼排ガスとして煙道12から排出される。
上部管寄せ1及び下部管寄せ2の周囲部分は耐火材13で覆われ、燃焼筒全体は断熱材14で覆われている。
また、水管内部に付着する水に含まれる不純物に対しては、洗浄のための薬品等を使用することで清掃が行われるが、十分な洗浄効果を得ることができないという問題点があった。
前記燃焼室(9)は水平方向に延設された円筒形状とし、
前記各水管は前記燃焼室(9)の左右側にそれぞれ配置された円弧形状とし、
前記燃焼室(9)の左側に配置された水管列に対して、上端に設けた直線状の左側上部管寄せ(1L)及び下端に設けた直線状の左側下部管寄せ(2L)でそれぞれ連結し、
前記燃焼室(9)の右側に配置された水管列に対して、上端に設けた直線状の右側上部管寄せ(1R)及び下端に設けた直線状の右側下部管寄せ(1R)でそれぞれ連結するとともに、
前記燃焼室(9)を臨む一端側に扉(蓋体22)を形成し、前記扉の外側面に設置されて前記燃焼室(9)に燃焼ガスを供給するバーナー(10)を備え、
前記バーナー(10)に対して、再生油を供給する再生油供給部(100)と、廃溶剤を供給する廃溶剤供給部(200)と、
前記再生油及び廃溶剤を前記バーナー内で噴霧させるための噴射空気を供給する噴射空気供給部(300)と、
前記再生油及び廃溶剤を前記バーナー内で燃焼させるための燃焼空気を供給する燃焼空気供給部(400)と、
前記再生油・廃溶剤・噴射空気・燃焼空気の供給を制御する制御部と、を備えたことを特徴としている。
前記水管列は、内側水管列(3)と外側水管列(4)とから構成され、外側水管列(4)の各水管は、内側水管列(3)の各水管の間に配置されたことを特徴としている。
左側上部管寄せ(1L)及び右側上部管寄せ(1R)の前記扉(蓋体22)側の各前面と、左側下部管寄せ(2R)及び右側下部管寄せ(2R)の前記扉(蓋体22)側の各前面に、開閉可能な孔部を形成したことを特徴としている。
内側水管列(3)及び外側水管列(4)から構成される水管列群は、前記燃焼室(9)の奥側に対して前記扉(蓋体22)側が低い位置となるように配置することを特徴としている。
その結果、廃剤である再生油や廃溶剤を燃料として利用することができ、燃料費のコスト削減を図ることができる。
図1~図3は多管式貫流ボイラーの外観を示すもので、横向きに配置された円筒状の本体20に装着されたヒンジ部21に対して、本体20の前面側を開閉する扉となる蓋体22が回動可能に装着されている。蓋体22の外側面には、バーナー10が設置され、バーナー10に燃料を供給して燃焼させることで、本体20内部の燃焼室9に燃焼ガスを発生させるようになっている。
本体20の燃焼室9に発生した燃焼ガスは、本体20の内部に設置された複数の水管を外側から加熱することで、水管内のボイラー水を加熱蒸発して蒸気(消費蒸気)を発生させるとともに、本体20の上方に設けた煙道12から燃焼排ガスとして搬出される。
バーナー10に対しては、再生油を供給する再生油供給部100と、廃溶剤を供給する廃溶剤供給部200と、再生油及び廃溶剤をバーナー10内で噴霧させるための噴射空気を供給する噴射空気供給部300と、再生油及び廃溶剤をバーナー10内で燃焼させるための燃焼空気を供給する燃焼空気供給部400とが設けられている。
廃溶剤供給部200から供給される廃溶剤は、1時間の蒸気発生量が2トン用の場合、20~50L/Hの流量で供給され、燃料制御ポンプ202を介することで更に廃溶剤の種類に応じて供給量が調整されて噴射部202に導かれる。
噴射部202では、所定供給量(本例の場合、20~50L/H)の廃溶剤と所定圧力(2~3kgf/cm2)の空気が混合されることで、廃溶剤が霧状に噴霧されてバーナー10内に導かれる。供給量は、廃溶剤の種類によって調整されている。
バーナー10内では、霧状に噴射される再生油と廃溶剤と、空気送出部(ブロワー)400から流量制御部401を介して供給される燃焼空気により、再生油及び廃溶剤を本体20内に導いて燃焼させる。
再生油や廃溶剤をボイラー燃料として利用することができるので、燃料費のコスト削減をはかることができる。
また、再生油として利用する使用済エンジンオイルは、二酸化炭素排出量がゼロ換算(エンジンオイルとしての使用時に既に換算されている)であるので、ボイラー燃料として利用しても二酸化炭素排出量が増加するような計算がなされないので、燃料として有効利用を図ることができる。
本体20の中央には、水平方向に延設された円筒形状の燃焼室9が形成され、燃焼室9の周囲を囲むように複数の円弧状水管が配設されている。
複数の円弧状水管の内、燃焼室9の左内側に配置された水管群を内側水管列3Lとし、各上端を直線状の左側上部管寄せ1Lで連結するとともに、各下端を直線状の左側下部管寄せ2Lで連結する。同様に、燃焼室9の右内側に配置された水管群を内側水管列3Rとし、各上端を直線状の右側上部管寄せ1Rで連結するとともに、各下端を直線状の右側下部管寄せ2Rで連結する。また、左右の内側水管列3L,3Rを構成する各水管の間を閉塞用フィン8で連結する。
また、多管式貫流ボイラーの本体20全体は断熱材14で覆われている。
この切欠部は、その切欠面積が蓋体22側で一番広くなる3段階の開口により形成する。これは、バーナー10の燃焼ガスの噴出口に近い位置の切欠部を大きくすることで(図7参照)、衝突壁30に衝突して逆流した燃焼ガスが蓋体22側付近まで戻り易いようにしている。
また、蓋体22の内側面に当接可能な外側環状区画壁16を内側水管列4の端部に設けることで、蓋体22側に逆流した燃焼ガスが内側水管列3と外側水管列4との間に導かれ、環状区画壁15の外側の衝突壁30側へ流れるように構成されている。
また、内側水管列3(左側内側水管列3L及び右側内側水管列3R)、外側水管列4(左側外側水管列4L及び右側外側水管列4R)から構成される水管列群は、奥側に対して蓋体(扉)22側が低い位置となるように本体20内に傾斜して配置されている。傾斜角度は、例えば5度程度が好ましい。
そして、上部管寄せ1L,1R側の孔部から洗浄用の水を供給し、下部管寄せ2L,2R側の孔部から排出させることで、各水管の内部を洗浄することが可能となる。この際、蓋体(扉)22側が奥側に対して低い位置に配置されているので、水管内部を洗浄する水が下部管寄せ2L,2R側の孔部から排出され易くすることができる。
燃焼ガスは、燃焼室9の端部に設置された衝突壁30で跳ね返り蓋体22側に戻されるが、図8に示すように、内側通煙口5及び切欠部(内側通煙口5A)から内側水管列3と外側水管列4の間の燃焼ガス通路7Aに導かれ、内側水管列3の内側面及び外側水管列4の内側面に接触し水管内のボイラー水を加熱させる。
内側水管列3及び外側水管列4の水管内のボイラー水が加熱されて蒸気となり、左側上部管寄せ1L及び右側上部管寄せ1Rに設けた蒸気排出口24から消費蒸気として取り出し、所望の供給場所で消費される。
燃焼ガスは水管内のボイラー水を加熱させることで温度が低下し、煙道12から外部に排出される。
すなわち、燃焼室9を水平方向に延設された円筒形状とすることで、燃焼室9を臨む一端側に蓋体(扉)22を形成することができるため、蓋体(扉)22の開閉動作で燃焼室9の内部を開口させることができるようになる。
そのため、廃油を燃焼ガスの燃料として使用することで燃焼室9が不純物で汚染された場合においても、開口させることで側方から容易に内部を清掃して不純物の除去を行うことができる。
その結果、廃剤である再生油や廃溶剤を燃料として利用することができ、燃料費のコスト削減を図ることができる。
2…下部管寄せ
3,3L,3R…内側水管列
4,4L,4R…外側水管列
5,5A,5B…内側通煙口
6…外側通煙口
7,7A,7B…燃焼ガス通路
8…閉鎖用フィン
9…燃焼室
10…バーナー
12…煙道
13…耐火材
14…断熱材
15…内側環状区画壁
16…外側環状区画壁
20…本体
21…ヒンジ部
22…蓋体(扉)
23…給水口
24…蒸気排出口
25…ネジ蓋(孔部)
30…衝突壁
100…再生油供給部
101…燃料制御ポンプ
102…噴射部(コンプレッサー)
200…廃溶剤供給部
201…燃料制御ポンプ
202…噴射部(コンプレッサー)
300…噴射空気供給部
301…圧力制御部
400…燃焼空気供給部
401…流量制御部
500…点火部
Claims (4)
- 複数の各水管の両端側をそれぞれ連通し、各水管にボイラー水を供給する一方、各水管の内側に燃焼室を形成し、該燃焼室からの燃焼ガスを複数の水管の外側に供給して水管内のボイラー水を加熱蒸発させ、消費蒸気を取り出すようにした多管式貫流ボイラーにおいて、
前記燃焼室は水平方向に延設された円筒形状とし、
前記各水管は前記燃焼室の左右側にそれぞれ配置された円弧形状とし、
前記燃焼室の左側に配置された水管列に対して、上端に設けた直線状の左側上部管寄せ及び下端に設けた直線状の左側下部管寄せでそれぞれ連結し、
前記燃焼室の右側に配置された水管列に対して、上端に設けた直線状の右側上部管寄せ及び下端に設けた直線状の右側下部管寄せでそれぞれ連結するとともに、
前記燃焼室を臨む一端側に扉を形成し、前記扉の外側面に設置されて前記燃焼室に燃焼ガスを供給するバーナーを備え、
前記バーナーに対して、再生油を供給する再生油供給部と、廃溶剤を供給する廃溶剤供給部と、
前記再生油及び廃溶剤を前記バーナー内で噴霧させるための噴射空気を供給する噴射空気供給部と、
前記再生油及び廃溶剤を前記バーナー内で燃焼させるための燃焼空気を供給する燃焼空気供給部と、
前記再生油・廃溶剤・噴射空気・燃焼空気の供給を制御する制御部と、
を備えたことを特徴とする多管式貫流ボイラー。 - 前記水管列は、内側水管列と外側水管列とから構成され、外側水管列の各水管は、内側水管列の各水管の間に配置された請求項1に記載の多管式貫流ボイラー。
- 左側上部管寄せ及び右側上部管寄せの前記扉側の各前面と、左側下部管寄せ及び右側下部管寄せの前記扉側の各前面に、開閉可能な孔部を形成した請求項1に記載の多管式貫流ボイラー。
- 内側水管列及び外側水管列から構成される水管列群は、前記燃焼室の奥側に対して前記扉側が低い位置となるように配置する請求項3に記載の多管式貫流ボイラー。
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EP19919815.1A EP3940292B1 (en) | 2019-03-15 | 2019-03-15 | Multi-tube once-through boiler |
PL19919815.1T PL3940292T3 (pl) | 2019-03-15 | 2019-03-15 | Wielorurowy kocioł przepływowy |
KR1020217028183A KR102681499B1 (ko) | 2019-03-15 | 2019-03-15 | 다관식 관류 보일러 |
US17/433,376 US20220170626A1 (en) | 2019-03-15 | 2019-03-15 | Multi-tube once-through boiler |
PCT/JP2019/010813 WO2020188625A1 (ja) | 2019-03-15 | 2019-03-15 | 多管式貫流ボイラー |
CN201980093884.0A CN113557389A (zh) | 2019-03-15 | 2019-03-15 | 多管式贯流锅炉 |
DK19919815.1T DK3940292T3 (da) | 2019-03-15 | 2019-03-15 | Flerrørsgennemstrømningskedel |
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