EP3899370A1 - Verfahren und vorrichtung zur nachverbrennung von in einer mono-klärschlammverbrennungsanlage anfallender klärschlammasche - Google Patents
Verfahren und vorrichtung zur nachverbrennung von in einer mono-klärschlammverbrennungsanlage anfallender klärschlammascheInfo
- Publication number
- EP3899370A1 EP3899370A1 EP19832038.4A EP19832038A EP3899370A1 EP 3899370 A1 EP3899370 A1 EP 3899370A1 EP 19832038 A EP19832038 A EP 19832038A EP 3899370 A1 EP3899370 A1 EP 3899370A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sewage sludge
- flue gas
- sludge ash
- gas
- line
- 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.)
- Pending
Links
- 239000010801 sewage sludge Substances 0.000 title claims abstract description 225
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000003546 flue gas Substances 0.000 claims abstract description 176
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 171
- 239000007789 gas Substances 0.000 claims abstract description 132
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000001301 oxygen Substances 0.000 claims abstract description 46
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 46
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 40
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 38
- 230000003647 oxidation Effects 0.000 claims abstract description 23
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 23
- 239000002956 ash Substances 0.000 claims description 120
- 238000006243 chemical reaction Methods 0.000 claims description 79
- 239000000203 mixture Substances 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 28
- 238000004056 waste incineration Methods 0.000 claims description 12
- 230000001413 cellular effect Effects 0.000 claims description 8
- 238000012432 intermediate storage Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 8
- 238000000605 extraction Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 11
- 229910052698 phosphorus Inorganic materials 0.000 description 7
- 239000011574 phosphorus Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- F23G5/006—General arrangement of incineration plant, e.g. flow sheets
-
- 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
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
-
- 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
- F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
-
- 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
- F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
-
- 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
- F23G2209/00—Specific waste
- F23G2209/30—Solid combustion residues, e.g. bottom or flyash
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2900/00—Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
- F23J2900/01002—Cooling of ashes from the combustion chamber by indirect heat exchangers
Definitions
- the invention is directed to a method for the post-combustion of sewage sludge ash obtained in a mono sewage sludge incineration in a rotary kiln and an apparatus for carrying out this method.
- the invention is therefore based on the object of providing a solution which allows the discharge of at most such a small proportion of unburned
- Carbon-containing sewage sludge ash from a mono sewage sludge incineration plant enables the sewage sludge ash obtained to be used without problems for phosphorus extraction.
- the object is achieved by a method for the afterburning of a
- Mono sewage sludge incineration in a rotary kiln using a hot and a low oxygen content, in particular an oxygen content of 6 - 10 vol Combustion chamber is removed from a combustion system assigned to the rotary kiln or from a power plant assigned to the rotary kiln and, if desired, is set to the low oxygen content required for the afterburning, and is supplied by it
- a sufficiently hot gas or flue gas stream causes an oxidation or afterburning of unburned carbon contained in the sewage sludge ash.
- a device for carrying out the method according to one of claims 1-10 which is characterized by a mono sewage sludge incineration plant comprising a rotary kiln for sewage sludge combustion with a connected sewage sludge supply and a first sewage sludge ash discharge with a connected sewage sludge ash line, which leads into a gas or Flue gas line opens into which a gas or flue gas stream branched off from a fired combustion chamber is fed to a combustion system assigned to the rotary kiln or from a power plant assigned to the rotary kiln.
- the step in the sewage sludge ash is oxidized by means of a sufficiently tempered and oxygen-containing gas or flue gas stream and is subsequently burned.
- the content of unburned carbon in the sewage sludge finally discharged finally from the mono sewage sludge incineration plant can thus be significantly reduced and, in particular, reduced to such a proportion that the sewage sludge ash obtained can be processed further in subsequent steps, in particular for the phosphorus recovery of the phosphorus contained in the sewage sludge ash.
- Flue gas flows from the combustion chambers of incineration plants have proven to be advantageous in that they have a sufficiently high temperature and, on the one hand, a sufficiently low but, on the other hand, a sufficiently high oxygen content required for the afterburning of the unburned carbon particles contained in the sewage sludge ash.
- the afterburning advantageously takes place after the sewage sludge ash has been fed into the gas or flue gas stream by this sewage sludge ash / gas flow mixture or sewage sludge ash.
- Flue gas flow mixture is fed to a reaction chamber or a reaction space, the flow cross section of this sewage sludge ash gas flow mixture or sewage sludge ash
- Flue gas flow mixture leading flue gas line as such
- Reaction chamber or such a reaction space can be formed.
- the process according to the invention is therefore characterized in a further embodiment in that the mixture of hot gas or flue gas stream and supplied sewage sludge ash is fed to a reaction space, in particular a reaction chamber, in which the unburned carbon contained in the sewage sludge ash is oxidized or afterburned
- the conditions for the post-combustion of the unburned carbon fraction contained in the sewage sludge ash are set such that, on the one hand, the temperature is sufficiently high to ensure post-combustion of the carbon, but on the other hand it is low enough to cause slagging of the sewage sludge gas stream or flue gas stream mixture to prevent leading flue gas pipe.
- the invention therefore further provides in an embodiment of the method that the temperature of the hot gas or flue gas stream is set such that it is high enough to cause the oxidation or afterburning of the unburned carbon contained in the sewage sludge ash and low on the other hand is enough that the increase in temperature of the sewage sludge-gas flow mixture or sewage sludge-flue gas flow mixture resulting from the oxidation or afterburning of the unburned carbon contained in the sewage sludge ash does not result in slagging of the reaction chamber or the reaction space or the sludge ash-gas flow mixture or sewage sludge ash-
- Flue gas flow mixture leading gas or flue gas line is effected.
- the quality of combustion is determined, inter alia, by the mixing of the ash particles with the oxidizing hot flue gas in the reaction space or in the reaction chamber.
- a "cold" flue gas flow can be used, which is connected to the reaction chamber or the reaction chamber at one or more points. This "cold” flue gas flow additionally prevents temperature peaks and thus further reduces the possible slagging of the reaction chamber and subsequent system components.
- “cold” flue gas flow is understood to mean a, preferably recirculated, flue gas in the temperature range from 100 ° C. to 250 ° C., in particular 120 ° C. to 200 ° C., which is, for example, after an electric filter of a / the incineration plant or from one of the assigned power plants.
- a "cold" flow of flue gas is introduced into the reaction space or the reaction chamber.
- the invention is finally characterized in that cold flue gas, preferably at a temperature in the temperature range from 100 ° C. to 250 ° C., in particular 120 ° C. to 200 ° C., is fed to the reaction chamber or the reaction chamber.
- the method therefore further provides that the sewage sludge ash is ground in a mill, which is preferably designed as a ball mill, before being fed to the gas or flue gas stream.
- Ball mills have proven to be particularly advantageous for grinding the sewage sludge ash.
- the invention provides that the sewage sludge ash is fed to a first cooling conveyor designed as a cooling screw and then, in particular before entering the mill, to a cellular wheel sluice after it leaves the rotary kiln.
- the method according to the invention is further characterized in that the sewage sludge ash / gas flow mixture or sewage sludge ash / flue gas flow mixture is fed downstream of the reaction chamber or the reaction chamber to a centrifugal separator, in particular a cyclone is and in the centrifugal separator, in particular cyclone, the sewage sludge ash and the gas or flue gas stream are separated from one another.
- An energetically particularly favorable further use of the gas or flue gas stream separated in the centrifugal separator is to feed it to the rotary kiln of the mono sewage sludge incineration plant.
- the invention therefore further provides that the gas or flue gas stream is fed to the rotary kiln downstream of the centrifugal separator, in particular the cyclone.
- the method according to the invention is suitable for the continuous sewage sludge incineration and treatment of sewage sludge ash obtained, so that the invention is further characterized in that the feeding of the sewage sludge ash into the gas or flue gas stream and the oxidation or afterburning of the unburned carbon content contained in the sewage sludge ash is carried out continuously and without intermediate storage become. It is also provided in an embodiment of the invention that the supply of the centrifugal separator, in particular cyclone, from the Sewage sludge ash separated gas or flue gas flow to the rotary kiln is carried out continuously and without intermediate storage.
- the device according to the invention is characterized in that at least one oxygen supply device or oxygen introduction device is arranged in the gas or flue gas line upstream of the mouth of the sewage sludge ash line, by means of which oxygen can be supplied to the flue gas flow conducted in the gas or flue gas line .
- a reaction space or a reaction chamber is formed in the gas or flue gas line downstream of the junction of the sewage sludge ash line, in which the oxidation or afterburning of the in the operation of the mono sewage sludge incineration plant and the fired combustion chamber Sewage sludge ash contains unburned carbon, wherein the flow cross section of the gas or flue gas line is preferably designed to form the reaction space or the reaction chamber, which the invention also provides.
- the device according to the invention is further characterized in that the sewage sludge ash line in the flow direction of the sewage sludge ash before it flows into the gas or flue gas line a first cooling conveyor designed as a cooling screw, a cellular wheel sluice and a mill, which is preferably designed as a ball mill, are arranged, which are integrated in the sewage sludge ash line and through which the sewage sludge ash can flow.
- a first cooling conveyor designed as a cooling screw
- a cellular wheel sluice and a mill which is preferably designed as a ball mill
- the invention provides for the arrangement or design of a centrifugal separator.
- the invention is also characterized in that in the gas or flue gas line in Flow direction of sewage sludge ash gas flow or
- a centrifugal separator for separating sewage sludge ash and gas or flue gas stream is arranged downstream of the confluence of the sewage sludge ash line and the reaction chamber or the reaction chamber.
- the device is further developed in such a way that the centrifugal separator, in particular a cyclone, has an exhaust pipe opening into the rotary kiln and another into a cooling screw Cooling conveyor has discharging sewage sludge ash discharge line.
- the centrifugal separator in particular a cyclone
- Cooling conveyor has discharging sewage sludge ash discharge line.
- the invention also provides in an expedient development that the gas or flue gas line at least in the flow direction of the gas or flue gas stream upstream of the mouth of the sewage sludge ash line has an oxygen supply device or oxygen introduction device.
- the hot flue gas can thus be adjusted to the oxygen content required for the combustion or post-combustion of the sewage sludge ash, in particular raised, and the required, oxidizing hot flue gas can be generated if the oxygen content of the flue gas removed from the incinerator is otherwise insufficient.
- mono sewage sludge incineration can be combined with a waste incineration plant or a waste incineration plant, from which the hot flue gas stream causing the afterburning of the sewage sludge ash originates.
- the invention is therefore also characterized in that the associated Incinerator is a waste incineration plant or the assigned power plant is a waste-to-energy plant.
- the device in a further development is characterized in that at least one flue gas introduction device for supplying cold flue gas with a temperature of preferably 100 ° C. to 250 ° C., in particular 120 ° C. to 200 ° C., opens into the reaction chamber or the reaction chamber.
- the single figure shows a schematic representation of a mono sewage sludge incineration plant 1 with an assigned waste incineration plant 2.
- the mono sewage sludge incineration plant 1 comprises a rotary kiln 3 with connected sewage sludge feed 4.
- sewage sludge feed 4 designed in the form of a pipe
- sewage sludge 3 for example from a sewage treatment plant
- the rotary kiln 3 has a first sewage sludge ash discharge 5.
- sewage sludge ash line 6 which opens into a gas or flue gas line 7.
- sewage sludge ash line 6 sewage sludge ash discharged from the rotary kiln 3 is fed to a gas or flue gas stream 7 flowing in the gas or flue gas line 7 and mixed during operation of the mono sewage sludge incineration plant 1.
- the sewage sludge ash discharged from the rotary kiln 3 is first fed in the flow direction of the sewage sludge ash to a first cooling conveyor 8 designed as a cooling screw, then through a cellular wheel sluice 9 and subsequently through a mill 10, which is preferably designed as a ball mill, before it then is supplied to the gas or flue gas line.
- the first cooling conveyor 8 designed as a cooling screw
- the cellular wheel sluice 9 and the mill 10 are arranged, which are integrated into the sewage sludge ash line 6 and through which the sewage sludge ash can flow.
- the mono sewage sludge incineration plant 1, in particular the rotary kiln 3, is assigned as the associated incineration plant 2a the waste incineration plant 2, which has a fired combustion chamber 11.
- the gas or flue gas line 7 branches off from the boiler 12 of the incineration plant 2a and thus from the boiler 12 assigned to the combustion chamber 11, so that flue gas originating from this gas or flue gas line from the combustion chamber 11 leads to the junction where the sewage sludge ash line 6 enters the gas or flue gas line 7 flows out, is feedable.
- an oxygen supply device or oxygen introduction device 13 is arranged, by means of which the gas or flue gas flow carried in the gas or flue gas line 7 can be metered with the oxygen that may be required to set the desired, lowest possible oxygen content.
- Air serves as an oxygen carrier.
- the gas or flue gas line 7 is assigned a plurality of so-called “blow guns” or compressed air introduction devices 13 a, by means of which compressed air can be blown into the gas or flue gas line 7.
- the blow guns 13a are arranged at structurally suitable locations and keep the gas or flue gas line 7 or this flow channel free of deposits by blowing in compressed air under increased pressure.
- the hot gas or flue gas flow 7 carried in the gas or flue gas line 7 and the sewage sludge ashes fed into the gas or flue gas line 7 by means of the sewage sludge ash line 6 mix to a sewage sludge / gas stream or flue gas stream mixture which has a reaction space 20 (not shown) or a reaction chamber 20 (not shown in detail), which is also a corresponding configuration of the flow cross section of the gas or flue gas line 7 can be formed, is supplied.
- This reaction chamber 20 or this reaction chamber 20 is thus formed in the flow direction of the sewage sludge-gas flow or flue gas flow mixture downstream of the confluence of the sewage sludge ash line 6 in the gas or flue gas line 7 and is indicated in the figure by dashed lines.
- this reaction chamber 20 or in this reaction chamber 20 when the mono sewage sludge incineration plant 1 and the fired combustion chamber 11 are operating, the oxidation or afterburning of the unburned carbon contained in the sewage sludge ash takes place by means of the hot and having a suitable, as low as possible oxygen content and by the gas or Flue gas line 7 supplied gas or flue gas flow instead.
- Lines for supplying “cold” flue gas 19 are connected to the reaction space 20 or the reaction chamber 20 at one or more points.
- the supply of “cold” flue gas 19 brings about a thorough mixing of the sewage sludge-gas flow mixture or sewage sludge-flue gas flow mixture located in the reaction chamber 20 or the reaction chamber 20, increases the degree of conversion of the residual carbon to be burned in the sewage sludge-gas flow mixture or sewage sludge-flue gas flow mixture and prevents it from occurring of temperature peaks in the reaction space or the reaction chamber.
- Cold '' flue gas or "cold" flue gas flow is understood to mean, for example, branched off from the exhaust line 15 of the centrifugal separator, in particular cyclones 14, or recirculated flue gas from the incineration plant 2a or the waste incineration plant 2, which, if appropriate after appropriate cooling or in particular after a Electric filter of the incineration plant 2a or the waste incineration plant 2 is removed and has a temperature between 100 ° C and 250 ° C, in particular between 120 ° C and 200 ° C.
- a flue gas (re) circulation is advantageously formed.
- a centrifugal separator is located downstream of the confluence of the sewage sludge ash line 6 into the gas or flue gas line 7 and downstream of the reaction chamber 20 or the reaction space 20.
- cyclone 14 for separating the sewage sludge ash gas flow or flue gas flow mixture into a sewage sludge ash part and a gas flow or flue gas flow part.
- An exhaust pipe 15 branches off from the centrifugal separator, in particular cyclone 14, and opens into the rotary kiln 3 in the area of the first sewage sludge ash discharge 5.
- this exhaust gas line 15 the gas stream or flue gas stream separated from the sewage sludge ash / gas stream mixture or sewage sludge ash / flue gas stream mixture during operation of the mono sewage sludge incineration plant 1 and the incineration plant 2 a or the waste incineration plant 2 in the centrifugal separator, in particular cyclone 14, is introduced and used in the rotary kiln 3 there to support the combustion of the remaining volatile constituents of the sewage sludge.
- the exhaust gas from the rotary kiln 3 is passed at the end of the sewage sludge supply 4 via a further flue gas line 21 into the boiler 12 of the waste incineration plant 12.
- the centrifugal separator in particular cyclone 14, is connected to a sewage sludge discharge line 16 through which the afterburned or oxidized sewage sludge ash separated from the sewage sludge-gas stream or flue gas mixture in the centrifugal separator, in particular cyclone 14, is discharged from the centrifugal separator, in particular cyclone 14 a further cooling conveyor 17, designed as a cooling screw, is fed into which the sewage sludge discharge line 16 opens. At the opposite end of the further cooling conveyor 17 there is then a discharge line 18 which forms the final, second sewage sludge ash discharge 18a of the mono sewage sludge incineration plant 1.
- a mono sewage sludge incineration plant 1 shown in the figure with a combustion plant 2a for example a mono sewage sludge incineration plant 1 comprising a rotary kiln 3 and a combustion plant 2a designed as a waste incineration plant 2
- the sewage sludge obtained by combustion from the rotary kiln 3 is incinerated by means of a hot and as low as possible, suitable for the after-combustion of sewage sludge burned in the rotary kiln 3 or sewage sludge ash formed there, in particular an oxygen content of 6-10 vol.% oxygen, gas flow or flue gas flow of oxidation or afterburning in the sewage sludge ash contained unburned carbon.
- the sewage sludge ash emerging from the rotary kiln 3 is fed to a gas stream or flue gas stream carried in the gas or flue gas line 7 and is hot enough, in particular 750 ° C - 1100 ° C, preferably 800 ° C - 1000 ° C, then becomes gas stream or flue gas stream causes the oxidation and afterburning of the unburned carbon contained in the sewage sludge ash.
- the gas or flue gas stream withdrawn from the fired combustion chamber 11 of the associated incineration plant 2a is adjusted, if desired, to the low oxygen content required for the post-combustion of the sewage sludge by means of at least one oxygen supply device or oxygen introduction device 13 arranged on the gas or flue gas line 7.
- the proportions of unburned carbon in the mixture of hot gas or flue gas stream and supplied sewage sludge ash are oxidized and afterburned in the reaction space 20 or the reaction chamber 20.
- the hot gas or flue gas stream flowing in the gas or flue gas line 7 has a temperature which is high enough to cause the oxidation or afterburning of the unburned carbon contained in the sewage sludge ash and low enough, so that due to the oxidation or afterburning of the unburned carbon contained in the sewage sludge ash, the temperature increase of the sewage sludge gas-gas mixture or sewage sludge ash
- blow guns 13a are also arranged on this blow cannon with a flow outlet directed and acting in the flow cross section of the gas or flue gas line 7.
- the sewage sludge ash is fed into the gas or flue gas stream and the oxidation or afterburning of the unburned carbon content contained in the sewage sludge ash is carried out continuously and without intermediate storage.
- the gas or flue gas stream separated from the sewage sludge ash in the centrifugal separator, in particular cyclone 14, is fed continuously to the rotary kiln 3 without intermediate storage.
- the procedural measures and procedural steps set out above result in each case during the ongoing operation of the mono-sewage sludge incineration plant 1 and the incineration plant 2a.
- the mono sewage sludge incineration plant 1 comprises in particular the complex comprising the sewage sludge feeder 4, the rotary kiln 3, the first cooling conveyor 8, the cellular wheel sluice 9, the mill 10, the cyclone 14, the further cooling conveyor 17 and the lines 6, 15 connecting them in each case , 16 and the gas or flue gas line 7 with assigned oxygen introduction device 13 and assigned blow guns 13a and the discharge line 18 as well as the reaction chamber 20 or the reaction chamber 20 with assigned supply lines / flue gas entry devices 19 for supplying “cold” flue gas.
- the essential aspect of the device according to the invention and the method according to the invention is directed to the aftertreatment of the sewage sludge ash discharged from the rotary kiln 3 by appropriate oxidation and afterburning of the unburned carbon portions contained in the sewage sludge ash, so that a reduction in the unburned carbon content in the sewage sludge ash is achieved and a corresponding one Use of the discharged from the further cooling conveyor 17 aftertreated sewage sludge ash, especially for phosphorus recovery, is possible.
- the unburned carbon content is reduced by oxidation and afterburning.
- the process or the process runs in particular continuously and preferably without intermediate storage of the sewage sludge ashes and consists of the following, essential steps:
- the sewage sludge ash emerging from the rotary kiln 3 is conveyed by means of a cooling screw or the first cooling conveyor 8 and passed through the cellular wheel lock 9 with exclusion of air;
- the sewage sludge ash is then ground in order to enlarge the fine particle fraction contained therein in the mill 10;
- the milled sewage sludge ash emerging from the mill 10 is fed to the hot flue gas stream drawn off from the combustion chamber or combustion chamber 11 or the boiler 12 downstream thereof and guided in the gas or flue gas line 7.
- the temperature of the hot flue gas is both sufficiently high and low enough to initiate the oxidation or post-combustion, so that the temperature rise resulting from the oxidation or post-combustion does not lead to slagging of the downstream flue gas line in the gas following the reaction chamber 20 or the reaction chamber 20 - Or flue gas line 7 comes.
- the flue gas flow led from the incineration plant 2 to the confluence of the sewage sludge ash line 6 in the gas or flue gas line 7 has a reduced or reduced, ie a small, proportion of oxygen in relation to air.
- the oxygen content of this gas or flue gas stream can be reduced to one for the after-combustion of the in the Sewage sludge ash unburned carbon appropriate value are regulated;
- the desired oxidation or afterburning of the unburned residual carbon content contained in the sewage sludge ash takes place in the reaction chamber 20 or the reaction space 20 in order to reduce the unburned residual carbon content in the sewage sludge ash;
- Sewage sludge ash and flue gas flow mixture is passed into cyclone 14, where the separation of sewage sludge ash and gas or flue gas flow takes place.
- the sewage sludge ash discharged from the cyclone 14 is fed to a subsequent treatment by means of suitable conveying elements, for example the further cooling conveyor 17;
- Mono sewage sludge incineration means the combustion of at least essentially exclusively sewage sludge, i.e. only sewage sludge is burned without the intended addition of other fuels or fuel components.
- unintentional or insignificant additions of other fuels or fuel components especially in the sense of components contained in sewage sludge, are possible.
- methods and devices are to be excluded in which an intended and intended co-combustion of sewage sludge with other fuels, for example coal, takes place.
- the supply of sewage sludge ash and a gas or flue gas stream, in particular one from and to the boiler 12 of the incinerator 2a recirculating flue gas flow can take place directly into / the reaction space 20 or / the reaction chamber 20. That is, the sewage sludge ash line 6 and the gas or flue gas line 7 and possibly the flue gas entry device 19 for supplying “cold” flue gas can all open directly into the reaction space 20 or the reaction chamber 20.
- Flue gas entry device for supplying "cold” flue gas
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Gasification And Melting Of Waste (AREA)
- Treatment Of Sludge (AREA)
- Incineration Of Waste (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018133237 | 2018-12-20 | ||
DE102019107744.3A DE102019107744A1 (de) | 2018-12-20 | 2019-03-26 | Verfahren und Vorrichtung zur Nachverbrennung von in einer Mono-Klärschlammverbrennungsanlage anfallender Klärschlammasche |
PCT/EP2019/085369 WO2020127066A1 (de) | 2018-12-20 | 2019-12-16 | Verfahren und vorrichtung zur nachverbrennung von in einer mono-klärschlammverbrennungsanlage anfallender klärschlammasche |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3899370A1 true EP3899370A1 (de) | 2021-10-27 |
Family
ID=70969874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19832038.4A Pending EP3899370A1 (de) | 2018-12-20 | 2019-12-16 | Verfahren und vorrichtung zur nachverbrennung von in einer mono-klärschlammverbrennungsanlage anfallender klärschlammasche |
Country Status (8)
Country | Link |
---|---|
US (1) | US20220074588A1 (de) |
EP (1) | EP3899370A1 (de) |
JP (1) | JP2022514925A (de) |
KR (1) | KR20210107746A (de) |
AU (1) | AU2019409440A1 (de) |
CA (1) | CA3124429A1 (de) |
DE (1) | DE102019107744A1 (de) |
WO (1) | WO2020127066A1 (de) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4571175A (en) * | 1985-04-29 | 1986-02-18 | Roan Industries, Inc. | Process for a disposal of waste solutions |
DE4121968A1 (de) * | 1991-06-28 | 1993-01-14 | Noell K & K Abfalltech | Verfahren zur kombinierten klaerschlamm- und muellverbrennung |
US5555821A (en) * | 1994-12-02 | 1996-09-17 | Martinez; Morris P. | Apparatus and process for removing unburned carbon in fly ash |
ATE217699T1 (de) * | 1997-10-13 | 2002-06-15 | Alstom | Verfahren zur aufbereitung von schlacke und/oder asche aus der thermischen behandlung von müll |
DE19961384A1 (de) * | 1999-12-20 | 2001-06-21 | Abb Alstom Power Ch Ag | Verfahren zur thermischen Behandlung von Rostasche aus Müllverbrennungsanlagen |
WO2003025094A1 (de) * | 2001-09-19 | 2003-03-27 | Herhof Umwelttechnik Gmbh | Verfahren zur reduzierung der organischen stoffe einer mineralischen abfallfraktion |
DE102013103770A1 (de) * | 2013-04-15 | 2014-10-16 | Rwe Power Ag | Verfahren zur Gewinnung von phosphorhaltigen Verbindungen aus Klärschlamm |
-
2019
- 2019-03-26 DE DE102019107744.3A patent/DE102019107744A1/de not_active Ceased
- 2019-12-16 KR KR1020217022753A patent/KR20210107746A/ko unknown
- 2019-12-16 JP JP2021536222A patent/JP2022514925A/ja active Pending
- 2019-12-16 WO PCT/EP2019/085369 patent/WO2020127066A1/de unknown
- 2019-12-16 US US17/416,597 patent/US20220074588A1/en not_active Abandoned
- 2019-12-16 AU AU2019409440A patent/AU2019409440A1/en not_active Abandoned
- 2019-12-16 CA CA3124429A patent/CA3124429A1/en active Pending
- 2019-12-16 EP EP19832038.4A patent/EP3899370A1/de active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102019107744A1 (de) | 2020-06-25 |
US20220074588A1 (en) | 2022-03-10 |
AU2019409440A1 (en) | 2021-08-12 |
CA3124429A1 (en) | 2020-06-25 |
JP2022514925A (ja) | 2022-02-16 |
KR20210107746A (ko) | 2021-09-01 |
WO2020127066A1 (de) | 2020-06-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102007005782B3 (de) | Verfahren und Anlage zur Trocknung von staubförmigen, insbesondere einer Vergasung zuzuführenden Brennstoffen | |
EP0461305B1 (de) | Verfahren zur Reinigung der Abgase von Anlagen zur Herstellung von Zementklinker | |
EP2771302B1 (de) | Verfahren und vorrichtung zum aufarbeiten von nassen, organische komponenten enthaltenden abfallstoffen | |
EP0442902B1 (de) | Vorrichtung und verfahren zur behandlung kontaminierten bodens | |
EP0846917A2 (de) | Verfahren und Vorrichtung zur Erzeugung von nutsbarem Gas aus Abfallstoffen | |
EP3309240A1 (de) | Verfahren und vorrichtung zum vergasen von biomasse | |
EP2375152B1 (de) | Vorrichtung und Verfahren zur Heißgaserzeugung mit integrierter Erhitzung eines Wärmeträgermediums | |
DE202007005195U1 (de) | Heißgasbetriebene Trocknungsvorrichtung | |
EP3899370A1 (de) | Verfahren und vorrichtung zur nachverbrennung von in einer mono-klärschlammverbrennungsanlage anfallender klärschlammasche | |
EP1436366A1 (de) | Verfahren zur stromerzeugung aus kohlenstoffhaltigem material | |
EP0728713A2 (de) | Verfahren zur Verwertung von Reststoffen bei der Zementherstellung | |
DE19703197A1 (de) | Verfahren und Vorrichtung zur Verbrennung von Holz und/oder Biomassen | |
WO2019086511A1 (de) | Verfahren und anlage zur thermischen behandlung eines lithiumerzes | |
EP1244818B1 (de) | Verfahren und anlage zur reduktion von feinerzen in einem mehrstufigen schwebegasstrom mit zyklonabscheider | |
DE19925011C2 (de) | Verfahren zur thermischen Entsorgung von heizwertreichen Fraktionen aus sortiertem Müll und/oder Reststoffen in fossil gefeuerten Kraftwerksanlagen | |
WO2000071934A1 (de) | Verfahren zur thermischen entsorgung von heizwertreichen fraktionen aus müll in fossil gefeuerten kraftwerksanlagen | |
EP3244989B1 (de) | Verfahren zur reduzierung von stickoxiden im abgas einer flugstrombehandlungsanlage | |
LU103014B1 (de) | Ausschließliche Verwendung von Ersatzbrennstoffen zur thermischen Behandlung mineralischer Stoffe, insbesondere von Tonen | |
EP3446799A1 (de) | Verfahren zur rückgewinnung von wertstoffen aus recycling-objekten | |
DE102021134014A1 (de) | Prozessanlage für das Umsetzen eines feststoffförmigen Eingangsmaterials in ein feststoffförmiges Prozessprodukt | |
DE10139597B4 (de) | Verfahren zur Verbrennung von Klärschlamm in einem Wirbelschichtkessel | |
DE102022209877A1 (de) | Ausschließliche Verwendung von Ersatzbrennstoffen zur thermischen Behandlung mineralischer Stoffe, insbesondere von Tonen | |
EP2416068A2 (de) | Vorrichtung und Verfahren zum Nachverbrennen von heißem Material auf einem Förderer | |
EP0520977A2 (de) | Schwelverfahren und Vorrichtung zur Niedertemperaturverkokung von zumindest teilweise organischen Abfallstoffen | |
AT411705B (de) | Anlage und verfahren zur verfeuerung von biomasse |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20210706 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20231114 |