CN1460166A - Regenerative thermal waste incineration system - Google Patents

Regenerative thermal waste incineration system Download PDF

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Publication number
CN1460166A
CN1460166A CN02800887A CN02800887A CN1460166A CN 1460166 A CN1460166 A CN 1460166A CN 02800887 A CN02800887 A CN 02800887A CN 02800887 A CN02800887 A CN 02800887A CN 1460166 A CN1460166 A CN 1460166A
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CN
China
Prior art keywords
ceramic layer
refuse
air
heat
accumulating type
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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.)
Pending
Application number
CN02800887A
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Chinese (zh)
Inventor
吴硕仁
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KEY ENGINEERING Co Ltd
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KEY ENGINEERING Co Ltd
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Filing date
Publication date
Application filed by KEY ENGINEERING Co Ltd filed Critical KEY ENGINEERING Co Ltd
Publication of CN1460166A publication Critical patent/CN1460166A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
    • F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00—Pretreatment
    • F23G2201/10—Drying by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2203/00—Furnace arrangements
    • F23G2203/40—Stationary bed furnace
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chimneys And Flues (AREA)
  • Treatment Of Sludge (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Air Supply (AREA)

Abstract

Provided is a regenerative thermal waste incineration system for incinerating waste using a regenerative thermal material. The regenerative thermal waste incineration system includes first and second ceramic layers for accumulating heat from high-temperature gas in backward operation and regenerating accumulated heat to low temperature gas in forward operation, a third ceramic layer and a fourth ceramic layer for accumulating heat from high-temperature gas in forward operation and regenerating accumulated heat to low temperature gas in backward operation, a first waste inlet valve located between the first ceramic layer and the second ceramic layer for introducing waste in forward operation, a second waste inlet valve located between the third ceramic layer and the fourth ceramic layer for introducing waste in backward operation, a burner located between the second ceramic layer and the third ceramic layer for supplying heat for incinerating, a first air valve for introducing air into the system through the first ceramic layer in forward operation, and a second air valve for introducing air into the system through the fourth ceramic layer in backward operation.

Description

Heat accumulating type incineration of waste system
Technical field
The present invention relates to a kind ofly can burn refuse at lower cost and the heat accumulating type incineration of waste system that does not produce secondary pollution, particularly a kind of heat accumulating type incineration of waste system that uses heat-storing material to burn industrial waste sludge, urban waste, food refuse and be derived from the waste sludge of final byproduct in chemical plant or sewage treatment plant with high moisture content.
Background technology
Usually, industrial waste sludge, urban waste, food refuse and mud slurry are disposed by landfill and/or burning.Particularly burning is adopted in the processing of mud more, by burning, the amount of refuse can reduce significantly and the secondary pollution that produces is less.
Since 1962, in common incineration of waste system, fluidized bed incinerator is used to burn the refuse from the municipal sewage plant always, as wet refuse or mud.Fluidized bed incinerator is made of a cylindrical refractory wall, and the sand as flow media is equipped with in its underpart.Use air to make refuse material to be burned floating flowing in flow media., by an outlet of supporting the plate of this sand bed air is introduced husky bed herein, make husky bed accessory that flowability be arranged, the pressure of this air is about 20 to 34kPa.At the incinerator duration of work, husky bed keeps 800 ℃ or higher temperature.Fluidised husky amount is increased to about 30 to 60%.Refuse imports from the bottom of incinerator.If the air rate height, some the unburned refuses on incinerator top just may be discharged in the atmosphere with combustion gas.Therefore, must the careful flow rate of controlling air.The fluidization effect makes between air and refuse and contacts maximization, causes burning completely.Because a large amount of sand as fluid media (medium) can be used as heat-storage medium, fluidized bed incinerator is applicable to the burning with high moisture content refuse.Yet, in some cases,, make to be difficult for reclaiming heat from refuse because the grains of sand can be formed piece under the trash burning state, cause additionally having increased operating cost and having made the processing cost costliness.
When incinerating solid waste or mud, also use a kind of rotary kiln incineration system, it is widely used in waste disposal mostly.The rotary kiln incineration stove has an inwall that has a refractory liner, and around trunnion axis about 2 to 3% rotations of tilting.When kiln rotates, in the kiln refuse constantly with air-flow in heat contact with oxygen and finish burning.The rotary speed of kiln is in 0.25 to 1.5rpm scope, and the movement velocity of incinerator outer wall is in 0.3 to 1.5m/min scope.Directly introducing refuse in the kiln when kiln rotates is burned and is become ashes.Ashes are collected by the container of an end of being located at kiln.Herein, heat is that a stove by the outlet that is positioned at kiln provides.The rotary kiln incineration system has multiple advantages: the firing rate of refuse is easy to control, needn't forces preliminary treatment, various refuse to be burned simultaneously and refuse retention time in system is easy to control etc. to burning.Yet, in the rotary kiln incineration system, need an independent after-burner and be used to the volatile material that burns, and be difficult to keep burning under the homogeneous condition.And, be difficult to form good sealing.Further, because a large amount of heat will be provided in the combustion chamber, make operating cost quite high.
For overcoming the high defective of operating cost that fluidized bed incinerator or rotary kiln incineration stove exist, a kind of multibed type stove or incinerator have occurred, and be widely used in burning from sludge of sewage treatment plants.Mud is introduced in the stove by a upper entrance of stove.The multibed type stove and accessory has the whole columniform internal face that is, a plurality of one of siege by refractory brick system are folded on another and arranged.Need to be introduced into the siege of last layer, and be moved down into nethermost siege continuously by the mud that stove is handled.The multibed type stove comprises that an injection axis is stirred with the promotion burning mud, and a drive unit that makes the injection axis rotation.Between at the bottom of central shaft and each layer, have aperture at the bottom of the stove layer of the odd number that from the top to the bottom, is provided with, at the bottom of furnace wall and each layer, have aperture at the bottom of the stove layer of even number, make mud pass these holes and move by jet-action.And, owing to passing these holes, the gas that produces of burning mud discharges by next-door neighbour's last layer siege.The stirring of injection axis and move downward and make the new one side of mud be exposed in the burning gases.Thereby on the siege of the upper strata of incinerator, the moisture that is contained in the mud of a great deal of is evaporated by high-temperature combustion gas, and the combustion gas that contains transpiring moisture from mud that enters in the atmosphere is known from experience the generation niff.
Summary of the invention
For addressing the above problem, the invention provides a kind of heat accumulating type incineration of waste system, it can burn with low cost have the mud of high moisture content, and can prevent that generation from can cause the imperfect combustion thing of secondary pollution, as niff or carbon monoxide.
Brief Description Of Drawings
Figure 1 shows that according to heat accumulating type incineration of waste of the present invention system;
Figure 2 shows that according to heat accumulating type incineration of waste of the present invention system to have an air blast in its back-end;
Figure 3 shows that it has the automatic open valve of threeway according to heat accumulating type incineration of waste of the present invention system; And
Figure 4 shows that it has an automatic open valve of four-way according to heat accumulating type incineration of waste of the present invention system.
The specific embodiment
Fig. 1 and Fig. 2 show according to heat accumulating type incineration of waste of the present invention system.This heat accumulating type incineration of waste system comprises: one or two (two-bed) thermal accumulating incinerator, this incinerator has first and second ceramic layers 105,106, in order to from high-temperature gas, to reclaim heat energy, and third and fourth ceramic layer 107,108, be used for that the rapid reduction to the refuse temperature compensates when dry refuse, make incineration temperature remain on a constant scope and after burning, gather high temperature heat, be installed on ceramic layer 105, between 107 and ceramic layer 106, the first and second refuse inlet valves 109 between 108,110, these two regenerative furnaces 113 have enough spaces in order to the combustible between ceramic layer 107 and 108 is carried out completing combustion, and by automatic Open valve 101,102,103 and 104 operations are so that can gather and accumulation of heat; One provides the air blast 100 of combustion air; And a cyclone cluster 111 and a bag filter 112 that is used to collect incinerating residue.Air blast 100 can be installed in the front end of CIU as shown in Figure 1, perhaps is installed in the rear end of CIU as shown in Figure 2.Automatically Open valve 101,102,103 and 104 can be replaced by triple valve 114 and 115 as shown in Figure 3, is perhaps replaced by cross valve 116 as shown in Figure 4.
The operating process of heat accumulating type incineration of waste system with structure shown in Figure 1 is as follows.
Combustion air is provided to thermal storage ceramic layer 105 by air blast 100 by valve 101, and is preheating to 800 to 1200 ℃ high temperature.At this moment, valve 101 and 104 be open and valve 102 and 103 cuts out.Humid waste with high moisture content is provided in the space between ceramic layer 105 and the ceramic layer 107 by the first refuse inlet valve 109.At this moment, the valve 110 that is used to import refuse is in closed condition.This humid waste is separated into steam and dry refuse by the hot-air by ceramic layer 105.Though the temperature of combustion air sharply descends because evaporation heat is provided, yet when by accumulation of heat, refractory ceramics layer 107, the temperature of combustion air, steam and refuse rises once more.Dry refuse is burned, and compares with by ceramic layer 107 time, and the combustion heat makes the temperature of discharging gas further raise.
When by ceramic layer 108 with 106 the time, discharging gas forward in the once-through operation chilled ceramic layer 108 and 106 discharge the heat of the overwhelming majority.The temperature of discharging gas changes with the ratio of contained humidity in the refuse.Like this, regenerative furnace 113 provides heat, makes ceramic layer 108 and 106 have enough heats and carries out subsequent operation.
After moving a scheduled time in the manner described above, the first refuse inlet valve 109 cuts out, and the hot-air completing combustion of ceramic layer 105 is passed through in the twice laid of being untreated between ceramic layer 105 and ceramic layer 107 in the space, and discharges the ashes that stay after the burning.This operation is called positive operation.Behind positive operation, valve 101 and 104 close and valve 102 and 103 open with the conversion air-flow.Then, the second refuse inlet valve 110 is opened so that refuse is imported in the space between ceramic layer 106 and the ceramic layer 108.At this moment, the first refuse inlet valve 109 cuts out and carries out reverse operating in the mode identical with positive operation.Repeated forward operation and reverse operating.
When positive operation, pass valve 104 in cyclone cluster 111 filtrations via ceramic layer 107,108 and 106 by burning the ashes that produce.When reverse operating, ashes pass valve 103 via ceramic layer 108,107 and 105 and filter at cyclone cluster 111.The remaining ashes that do not filter out in cyclone cluster are collected by bag filter 112.Discharging gas diffuses in the atmosphere after purifying.
By utilizing the direct heating ceramic filler of high temperature discharge gas, air at room temperature is contacted and accumulation of heat, dry and burn the refuse with high moisture content with high temperature air then with high temperature air, heat accumulating type incineration of waste of the present invention system has very high heat recovery efficiency.Therefore, need be used for burning the extra fuel cost with high moisture content refuse can reduce significantly.And, directly do not contact owing to burn back discharging gas, so can from discharge gas, not give out and make us uncomfortable smell and owing to the imperfect combustion secondary pollution that produces with waste material.
Calculated examples according to the heat accumulating type incineration of waste system of the present invention and the required fuel quantity of fluidized bed incinerator of routine is described as follows.
Example 1
Importing according to the wet feed mud drum of heat accumulating type incineration of waste of the present invention system draw together 87% moisture, 3% ash and 10% by C 8H 8O 2CI 0.1N 1S 0.1The organic matter of expression.Burn standard conditions and comprise the rate of feed of 1 ton/hr, 850 ℃ ignition temperature and 5% radiation loss.The total amount of heat of distributing from wet feed mud is 5,880kcal/kg.
The air capacity that imports in this heat accumulating type incineration of waste system is 5,000Nm 3/ hr, the temperature difference (Δ T) between the inlet of this heat accumulating type incineration of waste system and the outlet is 80 ℃, and discharging gas total amount is 6,149Nm 3/ hr.In the case, the total thermal capacity that needs is 754, and 000kcal/hr therefrom deducts the autoradiolysis of pug, promptly 588, and 000kcal/hr can draw actual required thermal capacity, and promptly 166,000kcal/hr.
The computational methods of extra heat capacity are as follows in the fluidized bed incinerator of routine.Be that the air capacity that imports conventional fluidized bed incinerator is 1,600Nm under 1.3 the situation at the air admission rate 3/ hr, and discharging gas total amount is 2,793Nm 3/ hr.When the combustion air that imports conventional fluidized bed incinerator was preheating to 350 ℃ with discharging gas, required total thermal capacity was 1,125,000kcal/hr, therefrom deduct the autoradiolysis of pug, promptly 588,000kcal/hr, can draw actual required thermal capacity, promptly 537,000kcal/hr.Industrial applicability
Use is compared with the situation of using conventional fluidized bed incinerator according to heat accumulating type incineration of waste of the present invention system, has increased energy-saving effect.

Claims (9)

1. heat accumulating type incineration of waste system comprises:
First and second ceramic layers are used for gathering heat and will gather heat positive operation from high-temperature gas at reverse operating reaching cryogenic gas;
One the 3rd ceramic layer and one the 4th ceramic layer are used for gathering heat and will gather heat reverse operating from high-temperature gas at positive operation reaching cryogenic gas;
One first refuse inlet valve is between described first ceramic layer and described second ceramic layer, in order to import refuse in positive operation;
One second refuse inlet valve is between described the 3rd ceramic layer and described the 4th ceramic layer, in order to import refuse in reverse operating;
One burner between described second ceramic layer and described the 3rd ceramic layer, is used to the heat that provides burning required;
One first air valve is used for introducing air by described first ceramic layer at positive operation in described system; And
One second air valve is used for introducing air by described the 4th ceramic layer at reverse operating in described system.
2. heat accumulating type incineration of waste according to claim 1 system, wherein the ashes that produce during burning pass through between corresponding ceramic layer.
3. heat accumulating type incineration of waste according to claim 1 system comprises that further one is used to provide the air blast of combustion air, and described air blast is installed in the front end of described system.
4. heat accumulating type incineration of waste according to claim 1 system comprises that further one is used to provide the air blast of combustion air, and described air blast is installed in the rear end of described system.
5. heat accumulating type incineration of waste according to claim 1 system, wherein said first and second air valves are triple valve.
6. heat accumulating type incineration of waste according to claim 1 system, wherein said first and second air valves are cross valve.
7. heat accumulating type incineration of waste according to claim 1 system comprises that further one is used to collect the cyclone cluster of incinerating residue.
8. heat accumulating type incineration of waste according to claim 1 system comprises that further one is used to collect the bag filter of incinerating residue.
9. incineration of waste method of using heat accumulating type incineration of waste according to claim 1 system, described method comprises and repeats a positive operation and a reverse operating, wherein in positive operation, refuse only imports by the described first refuse inlet valve, the described first refuse inlet valve is installed in the position of introducing combustion air, after a scheduled time, interrupt the importing of refuse, being retained in the described intrasystem refuse that is untreated is burned fully, and from described system, discharge ashes, in reverse operating, airflow direction conversion and refuse with described positive operation in identical step burned.
CN02800887A 2001-05-30 2002-05-30 Regenerative thermal waste incineration system Pending CN1460166A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR200129953 2001-05-30
KR1020010029953A KR20010070670A (en) 2001-05-30 2001-05-30 Regenerative Thermal Waste Incineration System

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CN1460166A true CN1460166A (en) 2003-12-03

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US (1) US20040020415A1 (en)
EP (1) EP1390666A1 (en)
JP (1) JP2004520565A (en)
KR (1) KR20010070670A (en)
CN (1) CN1460166A (en)
CA (1) CA2410719A1 (en)
WO (1) WO2002097328A1 (en)

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BRPI0510530A (en) * 2004-05-18 2007-10-30 Kuniomi Araki smoke reduction / flare treatment method and apparatus
WO2006136105A1 (en) * 2005-06-21 2006-12-28 Institute Of Engineering Thermophysics, Chinese Academy Of Sciences A combined dryer and a method and an equipment for incinerating the wet sludge with the combined dryer
KR100771667B1 (en) * 2006-05-10 2007-11-01 김일동 Movable collector system
US9657989B2 (en) * 2008-04-07 2017-05-23 Wastedry, Llc Systems and methods for processing municipal wastewater treatment sewage sludge
CN105327589A (en) * 2015-11-13 2016-02-17 惠州市环发环保科技有限公司 Waste gas treatment system
CN106051790A (en) * 2016-05-24 2016-10-26 杨峥雄 Regenerative thermal oxidizer (RTO) with waste solvent as auxiliary fuel and burning method
CN106348371B (en) * 2016-11-17 2019-04-12 山东大学 The minimizing technology of volatile organic matter in a kind of water difficult to degrade
EP3859207A1 (en) * 2020-01-29 2021-08-04 Steinmüller Engineering GmbH Combustion installation with heat accumulator
CN115405941A (en) * 2022-08-30 2022-11-29 江苏乾宏环保科技有限公司 Double-tower alternate heat accumulation type RTO waste gas incineration device and incineration method thereof

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Publication number Publication date
EP1390666A1 (en) 2004-02-25
WO2002097328A1 (en) 2002-12-05
JP2004520565A (en) 2004-07-08
US20040020415A1 (en) 2004-02-05
KR20010070670A (en) 2001-07-27
CA2410719A1 (en) 2002-12-05

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