EP0601584A1 - Anlage und Verfahren zur Abfallverbrennung - Google Patents

Anlage und Verfahren zur Abfallverbrennung Download PDF

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Publication number
EP0601584A1
EP0601584A1 EP93119892A EP93119892A EP0601584A1 EP 0601584 A1 EP0601584 A1 EP 0601584A1 EP 93119892 A EP93119892 A EP 93119892A EP 93119892 A EP93119892 A EP 93119892A EP 0601584 A1 EP0601584 A1 EP 0601584A1
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EP
European Patent Office
Prior art keywords
incinerator
combustion zone
waste
secondary combustion
air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93119892A
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English (en)
French (fr)
Other versions
EP0601584B1 (de
Inventor
Kazuo C/O Kobe Steel Ltd. Takahashi
Hiroaki C/O Kobe Steel Ltd. Kawabata
Mamoru C/O Kobe Steel Ltd. Suyari
Tadashi C/O Kobe Steel Ltd. Ito
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Kobe Steel Ltd
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Kobe Steel Ltd
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Publication date
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Publication of EP0601584A1 publication Critical patent/EP0601584A1/de
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Publication of EP0601584B1 publication Critical patent/EP0601584B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/50—Control or safety arrangements
    • 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 
    • F23C10/00—Fluidised bed combustion apparatus
    • F23C10/18—Details; Accessories
    • F23C10/20—Inlets for fluidisation air, e.g. grids; Bottoms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel 
    • F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel  by discharging the air above the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00—Waste heat recuperation
    • F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/10—Arrangement of sensing devices
    • F23G2207/101—Arrangement of sensing devices for temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2207/00—Control
    • F23G2207/50—Cooling fluid supply

Definitions

  • the present invention relates to a waste incinerator adapted to be installed in a waste incinerating plant or the like, and also relates to a waste incinerating method using the waste incinerator.
  • an incinerator constitutes one of important equipments in a waste incinerating plant, and serves to completely burn and incinerate refuse supplied and also to suppress the generation of harmful substances during combustion of the refuse.
  • Such an incinerator is generally classified into a stoker type and a fluidized bed type.
  • An example of the structure of the fluidized bed type incinerator in the prior art is shown in Fig. 9.
  • an incinerator body 80 has a laminated structure consisting of a refractory 81, an insulator 82, and a shell 83, which are laminated in this order from the inside of the body 80. Further, a sand bed 84 is provided at the bottom in the body 80. A fluidizing air (primary air for combustion) is infected into the sand bed 84 through fluidizing grids 86 provided under the sand bed 84, thus starting fluidization of the sand bed 84. At starting, the sand bed 84 is heated by a temperature raising burner 87.
  • the combustion gas generated in the free board 90 is ejected from the incinerator at an outlet temperature of about 900°C.
  • the remaining incombustible is circulated in the sand bed 84, and is finally ejected from the incinerator through an incombustible extraction pipe 92, an incombustible extractor 94, and a vibrating screen 96.
  • the sand (fluidic medium) separated from the incombustible by the vibrating screen 96 is returned through a fluidic medium circulator 98 to the sand bed 94 in the incinerator.
  • reference numeral 99 denotes a fuel supply hole for supplying an auxiliary fuel into the sand bed 84.
  • combustion control may be carried out so as to supply an optimum air quantity for an actual supply quantity of refuse.
  • a combustion control can reduce the emission of dioxin, it is difficult to accurately measure the actual supply quantity of refuse. Further, a combustion condition varies with a quality of refuse. Accordingly, it is actually difficult to carry out the accurate combustion control as mentioned above.
  • a waste incinerator for burning waste supplied into the incinerator to gasify the waste and ejecting the gasified waste out of the incinerator; a primary combustion zone for burning the waste to pyrolyze and gasify it is formed in the incinerator; a secondary combustion zone for further burning gas generated in the primary combustion zone is formed above the primary combustion zone in the incinerator; and a recirculation vortex of gas directed upwardly from an inlet portion of the secondary combustion zone and turned down before an outlet portion of the secondary combustion zone is formed in the secondary combustion zone (claim 1).
  • air supplying means for supplying an auxiliary combustion air into the incinerator is provided as means for forming the recirculation vortex, and an inside shape of the incinerator in the secondary combustion zone and a supply position and a supply direction of the auxiliary combustion air from the air supplying means are set so as to form the above recirculation vortex (claim 2).
  • the inside shape of the incinerator in the secondary combustion zone is set so that the outlet portion of the secondary combustion zone is upwardly decreased in diameter; the supply position of the auxiliary combustion air from the air supplying means is set at the inlet portion and the outlet portion of the secondary combustion zone; and the supply direction of the auxiliary combustion air to be supplied at the outlet portion is set downward (claim 3).
  • the supply direction of the auxiliary combustion air to be supplied at the inlet portion of the secondary combustion zone is set so as to be swirled (claim 4), or the inside shape of the incinerator in the secondary combustion zone is set so that the inlet portion of the secondary combustion zone is upwardly increased in diameter (claim 5).
  • a tertiary combustion zone for retaining gas burned in the secondary combustion zone is formed between the secondary combustion zone and an outlet of the incinerator (claim 7).
  • a cooling jacket is formed in a side wall of the incinerator surrounding the secondary combustion zone or the tertiary combustion zone, and feeding means for feeding a cooling fluid to the cooling jacket is provided (claim 6 or 8).
  • waste is burned to generate gas in the primary combustion zone, and the gas is then introduced into the secondary combustion zone, in which the gas is further burned. Further, a recirculation vortex of gas directed upwardly from the inlet portion of the secondary combustion zone and turned down before the outlet portion of the secondary combustion zone is formed in the secondary combustion zone. Accordingly, the gas and the auxiliary combustion air can be sufficiently mixed with each other by this recirculation vortex.
  • the auxiliary combustion air supplied to the inlet portion of the secondary combustion zone and the unburned gas generated by the combustion of waste in the primary combustion zone are introduced into the secondary combustion zone. Then, the mixture of the gas and the air is raised toward the outlet portion of the secondary combustion zone, and is then turned down by the restriction formed at the outlet portion of the secondary combustion zone. Then, the mixture thus turned down is forced downwardly by the auxiliary combustion air supplied downwardly at the outlet portion of the secondary combustion zone, thus forming the recirculation vortex.
  • the auxiliary combustion air supplied at the inlet portion of the secondary combustion zone is swirled to thereby accelerate the formation of the recirculation vortex.
  • the gas passage at the inlet portion of the secondary combustion zone is rapidly increased in diameter, so that the rising gas passing through the inlet portion is expanded in the radial direction of the inlet portion to flow into the secondary combustion zone.
  • the auxiliary combustion air is supplied downwardly at the outlet portion of the secondary combustion zone, thereby more stably accelerating the formation of the recirculation vortex.
  • the waste incinerator according to claim 7 is provided with a tertiary combustion zone between the secondary combustion zone and the outlet of the incinerator. Accordingly, the combustion gas generated in the secondary combustion zone is retained in the tertiary combustion zone until the gas is ejected from the outlet of the incinerator. Thus, more complete combustion can be effected.
  • the cooling fluid is fed to the cooling jacket formed in the side wall of the incinerator surrounding the secondary combustion zone or the tertiary combustion zone, thereby preventing an abnormal increase in temperature in the incinerator and simultaneously recovering the heat generated in the incinerator through the cooling fluid to effectively utilize thermal energy.
  • the flow rate of the cooling fluid is controlled according to an actual temperature in the incinerator, thereby maintaining a proper temperature in the incinerator more accurately.
  • the recirculation vortex is formed in the secondary combustion zone to improve the efficiency of mixing between the auxiliary combustion air and the gasified waste. Accordingly, the emission of dioxin can be greatly suppressed without complex combustion control.
  • the auxiliary combustion air is injected in a swirling condition from the inlet portion of the secondary combustion zone. Accordingly, the recirculation vortex con be formed more easily.
  • the outlet portion of the secondary combustion zone is configured so that the gas passage at the outlet portion is gradually restricted toward the upper end of the outlet portion. Accordingly, the auxiliary combustion air supplied downwardly from the outlet portion of the secondary combustion zone can be prevented from flowing into the primary combustion zone owing to the acceleration of formation of the recirculation vortex by the rapid expansion of the gas passage at the inlet portion of the secondary combustion zone and owing to the specific shape of the secondary combustion zone. As a result, the recirculation vortex can be stabilized.
  • the gas burned in the secondary combustion zone is retained in the tertiary combustion zone until the gas reached the outlet of the incinerator. Accordingly, even in the case where the gas burned in the secondary combustion zone contains a substance requiring a long time for combustion, such as carbon, or in the case where an oxygen quantity or a fuel supply quantity is small, sufficient combustion in the incinerator can be ensured.
  • the cooling fluid is fed to the cooling jacket formed in the side wall of the incinerator surrounding the secondary combustion zone or the tertiary combustion zone. Accordingly, an excessive increase in temperature in the incinerator can be prevented to ensure normal combustion. Moreover, the heat generated in the incinerator can be recovered through the cooling fluid as a medium, thereby realizing energy saving.
  • the flow rate of the cooling fluid is controlled according to an actual temperature in the incinerator, thereby maintaining a proper temperature range in the incinerator more accurately.
  • FIG. 1 to 4 A first preferred embodiment of the present invention will now be described with reference to Figs. 1 to 4.
  • the laminated structure of the side wall of an incinerator body 10 and the construction of the peripheral equipment are similar to those shown in Fig. 9, and the explanation thereof will be omitted herein.
  • the inside of the incinerator body 10 is divided into a primary combustion zone (gasification zone) A1, a secondary combustion zone (main combustion zone) A2, and a tertiary combustion zone A3, which are arranged in this order from the lower side.
  • a lower restriction 12 projecting from the inner wall surface of the body 10 is provided at an interfacial portion between the primary combustion zone A1 and the secondary combustion zone A2, and an upper restriction 14 projecting from the inner wall surface of the body 10 is provided at an interfacial portion between the secondary combustion zone A2 and the tertiary combustion zone A3.
  • An air supplying device (air supplying means) 15 is connected to the lower restriction 12 and the upper restriction 14.
  • the lower restriction 12 has an inner circumferential surface consisting of a tapering surface 16 upwardly decreasing in diameter, a cylindrical surface 17 constant in diameter, and a tapering surface 18 upwardly increasing in diameter, which are arranged in this order from the lower side.
  • the cylindrical surface 17 is formed with a plurality of secondary air injection holes 20 arranged circumferentially at regular intervals so that the air supplied from the air supplying device 15 may be injected as a secondary air (auxiliary combustion air) from each secondary air injection hole 20 into the incinerator.
  • the direction of injection of the secondary air is so set as to be inclined upwardly at an appropriate angle (e.g., about 30°) with respect to a horizontal direction in a vertical section as shown in Fig.
  • the direction is set so that the secondary air may be supplied upwardly spirally into the incinerator.
  • the upper restriction 14 has an inner circumferential surface consisting of a tapering surface 22 upwardly decreasing in diameter and a tapering surface 24 upwardly increasing in diameter, which are arranged in this order from the lover side.
  • the upper restriction 14 is formed with a plurality of (e.g., four) tertiary air injection holes 26 arranged circumferentially at equal intervals and with a plurality of auxiliary tertiary air injection holes 28 between the tertiary air injection holes 26 so that the air supplied from the air supplying device 15 may be injected as a tertiary air (auxiliary combustion air) from these injection holes 26 and 28 into the incinerator.
  • a tertiary air auxiliary combustion air
  • the direction of injection of the tertiary air from the tertiary air injection holes 26 is so set as to be inclined downwardly at an appropriate angle with respect to a horizontal direction in a vertical section as shown in Fig. 1 and to coincide with a radial direction in a horizontal section as shown in Fig. 2(b).
  • the direction is set at an appropriate angle ranging from about 0° to about 60° (e.g., about 45°) with respect to the radial direction in a plane perpendicular to a center axis of the incinerator.
  • the direction of injection of the tertiary air from the auxiliary tertiary air injection holes 28 is so set as to coincide with the horizontal direction in the vertical section as shown in Fig. 1 and coincide with the radial direction in the horizontal section as shown in Fig. 2(b).
  • the internal shape of the incinerator in the secondary combustion zone A2 is set so that the inlet portion of the zone A2 is upwardly increased in diameter and the outlet portion of the zone A2 is upwardly decreased in diameter.
  • refuse is supplied onto a sand bed (not shown) provided in the primary combustion zone A1, and the refuse is then burned to be gasified, which is in turn introduced into the secondary combustion zone A2.
  • the secondary air is upwardly injected in a swirling condition from the secondary air injection holes 20 of the lower restriction 12 forming the inlet portion of the zone A2.
  • the secondary air injected is raised as radially expanding, and is thereafter restricted toward the center axis by the tapering surface 22 of the upper restriction 14 forming the outlet portion of the zone A2.
  • the tertiary air is downwardly injected from the tertiary air injection holes 26 of the upper restriction 14, thereby forming a recirculation vortex (i.e., a gas flow turning down at the outlet portion of the zone A2 after rising) in combination with the secondary air.
  • the secondary air and the tertiary air are effectively mixed with the combustion gas rising from the primary combustion zone A1, thereby effectively reburn the combustion gas.
  • a gas generated by this recombustion is allowed to flow through the tertiary combustion zone A3, and is then ejected from the upper portion of the incinerator.
  • the lower and upper restrictions 12 and 14 are provided at the inlet and the outlet of the secondary combustion zone A2, respectively, and the secondary air and the tertiary air are injected from the lower and upper restrictions 12 and 14, respectively, thereby forming the recirculation vortex in the secondary combustion zone A2. Accordingly, the gasified refuse is sufficiently mixed with the secondary air and the tertiary air (both serving as the auxiliary combustion air) by utilizing this recirculation vortex. As a result, the generation of dioxin can be greatly suppressed.
  • the formation of the recirculation vortex is effected more easily, and the flow in the secondary combustion zone A2 becomes complex to thereby more accelerate the mixing of the combustion gas with the air in the zone A2.
  • the flow in the tertiary combustion zone A3 also becomes a swirling condition, a residence time in the zone A3 can be lengthened.
  • the gas in the secondary combustion zone A2 can be prevented from upwardly passing along the center axis of the incinerator, thereby forming a stronger recirculation vortex. Further, since the tertiary air is injected also from the auxiliary tertiary air injection holes 28 located between the tertiary air injection holes 26, the upward pass of the gas along the center axis can be prevented more reliably.
  • both the restriction of the gas passage by the tapering surface 22 and the downward injection of the tertiary air at the outlet of the secondary combustion zone A2 are particularly important for the formation of the recirculation vortex. If the restriction of the gas passage by the tapering surface 22 were not present, the formation of the vortex would not be accelerated. Furthermore, if the downward injection of the tertiary air were not present, the gas containing an intermediate product generated in the primary combustion zone A1 would upwardly pass through the central portion of the incinerator to result in insufficient mixing.
  • Figs. 3 and 4 show the results of numerical calculations of a CO mixed condition and a gas velocity vector in the conventional incinerator shown in Fig. 9 and in the incinerator of the preferred embodiment shown in Fig. 1, respectively. It is understood from Figs. 3 and 4 that almost no recirculation vortex is formed in the conventional incinerator to result in a bad mixed condition of CO, whereas the recirculation vortex is apparently formed in the secondary combustion zone A2 of the incinerator in this preferred embodiment, and CO is sufficiently mixed with the secondary air and the tertiary air by this recirculation vortex.
  • Fig. 10 shows the results of a combustion test in two model furnaces of the conventional type and the preferred embodiment type each having a capacity of 2.5 tons per day.
  • each model furnace no sand bed is provided, and a city gas burner is used.
  • simulation is performed so that a CO exhaust quantity and its timed pattern in a combustion operation under the same conditions as those in an actual furnace having a sand bed (i.e., a waste incinerator with a fluidized bed) can be obtained.
  • a combustion operating method such that a CO exhaust quantity and its timed pattern similar to those in the conventional actual furnace are generated is searched by using the model furnace of the conventional type. Thereafter, combustion operation is carried out in the model furnace of the preferred embodiment type by the same method as the combustion operating method searched above to measure the result.
  • rated conditions means design conditions, and accordingly the CO exhaust quantities under the rated conditions in both types are zero.
  • local low-load conditions means operating conditions in the condition where the supply of refuse is cut
  • local overload conditions means operating conditions in the condition where refuse is supplied locally excessively.
  • the CO exhaust quantity can be suppressed to 1% or less under the local overload conditions by the model furnace of the preferred embodiment type as compared with by the model furnace of the conventional type, and that the CO exhaust quantity can be suppressed to substantially zero under the local low-load conditions.
  • This result is considered to be due to the fact that the unburned gas is well mixed with the auxiliary combustion air by the recirculation vortex formed in the secondary combustion zone of the model furnace of the preferred embodiment type.
  • the more rapidly the gas passage is expanded by the tapering surface 18 of the lower restriction 12 the more easily the recirculation vortex is formed.
  • a degree of restriction by the tapering surface 16 becomes higher to cause an excessive increase in velocity of the main gas flow with the result that the formation of the vortex becomes difficult to the contrary.
  • the incinerator of the second preferred embodiment is designed so that the incinerator body 10 itself is formed with a divergent portion 30 and a convergent portion 32 at the inlet and the outlet of the secondary combustion zone A2, respectively. Accordingly, the inner diameter of the incinerator in the secondary combustion zone A2 is actually larger than that in the other zones A1 and A3. According to such a structure, the gas passage can be rapidly expanded at the inlet of the secondary combustion gone A2 without restricting the outlet of the primary combustion zone A1, thereby easily forming a sufficient recirculation vortex.
  • a center axis G1 of the incinerator in the primary combustion zone A1 is horizontally shifted from a center axis G2 of the incinerator in the secondary combustion zone A2, thereby forming an opening through the upper surface of a housing defining the primary combustion zone A1 and using this opening as a refuge supply hole 34.
  • the refuse supply hole 34 can be located nearer to the central portion of the primary combustion zone A1 as compared with the structure that the center axis G1 in the primary combustion zone A1 is coincident with the center axis G2 in the secondary combustion zone A2 as shown in the first and second preferred embodiments.
  • a recirculation vortex can be stably formed in the secondary combustion zone A2, thereby effecting sufficient mixing of the combustion gas and the auxiliary combustion air and a reduction in dioxin.
  • the fluidized bed type incinerator mentioned above in each preferred embodiment is excellent in load following ability (i.e., high in responsiveness of a temperature change in the incinerator due to refuse supply). Therefore, particularly in the secondary combustion zone A2 where positive mixing is performed to promote combustion and in the tertiary combustion zone A3 downstream of the zone A2, the temperature in the incinerator easily exceeds a preferable temperature range (800 - 1000°C in the above preferred embodiments). Such an undue temperature rise may cause the generation of thermal NOx or melting of fly ash on the wall surface of the incinerator, thus reducing the performance of the incinerator. Further, about 2% of a heat quantity generated in the incinerator is wastefully dissipated from the wall of the incinerator to the outside thereof, so that the recovery of such a dissipated heat quantity is desired.
  • the incinerator of the fourth preferred embodiment is designed so that a cooling jacket is provided on the wall of the incinerator to effect cooling of the inside of the incinerator and recovery of heat dissipating from the wall of the incinerator.
  • cooling jackets 36 and 38 each having a doughnut-shaped space therein are formed in the side walls surrounding the secondary combustion zone A2 and the tertiary combustion zone A3, respectively. Both the cooling jackets 36 and 38 are connected through a cooling water supply passage 39 to a pump (feeding means) 40, and are connected through a hot water recovery passage 42 to a tank (not shown).
  • the incinerator body is provided with thermocouples (temperature detecting means) 44 and 46 for detecting temperatures in the secondary combustion zone A2 and the tertiary combustion zone A3, respectively, and is also provided with a flow control device 48 for controlling a discharge quantity from the pump 40 according to detected temperatures by the thermocouples 44 and 46.
  • the flow control device 48 is so designed as to increase the discharge quantity from the pump 40 from a fundamental flow rate when at least one of the detected temperatures by the thermocouples 44 and 46 exceeds a permissible maximum temperature (1000°C in this preferred embodiment).
  • the temperature in the incinerator can be maintained at a proper temperature by the cooling water flowing in the cooling jackets 36 and 38, and the heat generated in the incinerator can be recovered through the cooling water as a medium (concretely, a hot water obtained by the heat generated in the incinerator is recovered to the tank). Accordingly, the heat of the hot water can be recycled for heating or the like in an incinerating plant. Concretely, it has been confirmed that a hot water having a temperature of about 80°C can be recovered at a rate of 2.5 tons per hour in an incinerator having a refuse disposal capacity of 100 tons per day owing to the provision of the cooling jackets 36 and 38.
  • a waste incinerator capable of sufficiently mixing gasified refuse (waste) with an auxiliary combustion air to thereby reduce the emission of dioxin during incineration.
  • the interior of an incinerator body (10) is divided into a primary combustion zone (A1), a secondary combustion zone (A2), and a tertiary combustion zone (A3).
  • a lower restriction (12) is provided at an interfacial portion between the zones (A1) and (A2)
  • an upper restriction 14 is provided at an interfacial portion between the zones (A2) and (A3), whereby an inlet portion of the secondary combustion zone (A2) is so configured as to upwardly increase in diameter, and an outlet portion of the secondary combustion zone (A2) is so configured as to upwardly decrease in diameter.
  • a secondary air is upwardly injected in a swirling condition from secondary air injection holes (20) of the lower restriction (12), and a tertiary air is downwardly injected from tertiary air injection holes (26) of the upper restriction (14).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Incineration Of Waste (AREA)
EP93119892A 1992-12-11 1993-12-09 Anlage und Verfahren zur Abfallverbrennung Expired - Lifetime EP0601584B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP33197392 1992-12-11
JP331973/92 1992-12-11
JP189946/93 1993-07-30
JP18994693 1993-07-30

Publications (2)

Publication Number Publication Date
EP0601584A1 true EP0601584A1 (de) 1994-06-15
EP0601584B1 EP0601584B1 (de) 1997-08-27

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KR (1) KR0131745B1 (de)
DE (1) DE69313415T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0823590A1 (de) * 1996-02-29 1998-02-11 Mitsubishi Heavy Industries, Ltd. Verfahren und vorrichtung zur erzeugung von überhitztem dampf mittels wärme von abfallverbrennung
WO2000032988A1 (en) * 1998-11-18 2000-06-08 Bernardini, Mario Reactor for afterburning of gases resulting from combustion
US6168425B1 (en) 1996-06-25 2001-01-02 Ebara Corporation Method for fusion treating a solid waste for gasification

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0033356A1 (de) * 1980-01-30 1981-08-12 Deutsche Babcock Aktiengesellschaft Vorrichtung zum Verbrennen von Stoffen mit schwer ausbrennenden Bestandteilen
US4300460A (en) * 1978-03-10 1981-11-17 Enterprises International Inc. Method for generating heat from waste fuel
EP0289932A1 (de) * 1987-04-27 1988-11-09 Energiagazdalkodasi Intezet Verfahren und Feuerungsanlage zum Verbrennen von festen fluidisierten Brennstoffen
EP0359544A2 (de) * 1988-09-16 1990-03-21 Ogden Environmental Services, Inc. Verfahren und Vorrichtung zur Kühlung von Hochtemperaturprozessen
JPH02259325A (ja) * 1989-03-30 1990-10-22 Babu Hitachi Eng Service Kk ボイラ付き廃棄物焼却装置
EP0458967A1 (de) * 1989-02-17 1991-12-04 Ebara Corporation Wirbelbettverbrennungsofen
JPH04340014A (ja) * 1991-05-17 1992-11-26 Kubota Corp 焼却炉の空気量調整方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300460A (en) * 1978-03-10 1981-11-17 Enterprises International Inc. Method for generating heat from waste fuel
EP0033356A1 (de) * 1980-01-30 1981-08-12 Deutsche Babcock Aktiengesellschaft Vorrichtung zum Verbrennen von Stoffen mit schwer ausbrennenden Bestandteilen
EP0289932A1 (de) * 1987-04-27 1988-11-09 Energiagazdalkodasi Intezet Verfahren und Feuerungsanlage zum Verbrennen von festen fluidisierten Brennstoffen
EP0359544A2 (de) * 1988-09-16 1990-03-21 Ogden Environmental Services, Inc. Verfahren und Vorrichtung zur Kühlung von Hochtemperaturprozessen
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0823590A1 (de) * 1996-02-29 1998-02-11 Mitsubishi Heavy Industries, Ltd. Verfahren und vorrichtung zur erzeugung von überhitztem dampf mittels wärme von abfallverbrennung
EP0823590A4 (de) * 1996-02-29 2001-03-21 Mitsubishi Heavy Ind Ltd Verfahren und vorrichtung zur erzeugung von überhitztem dampf mittels wärme von abfallverbrennung
US6168425B1 (en) 1996-06-25 2001-01-02 Ebara Corporation Method for fusion treating a solid waste for gasification
WO2000032988A1 (en) * 1998-11-18 2000-06-08 Bernardini, Mario Reactor for afterburning of gases resulting from combustion

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EP0601584B1 (de) 1997-08-27
DE69313415D1 (de) 1997-10-02
DE69313415T2 (de) 1998-02-19
KR0131745B1 (ko) 1998-04-15
KR940015366A (ko) 1994-07-20

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