CN113692513A - Incineration device for solid material and method for replacing nozzle inserts thereof - Google Patents

Incineration device for solid material and method for replacing nozzle inserts thereof Download PDF

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Publication number
CN113692513A
CN113692513A CN202080031063.7A CN202080031063A CN113692513A CN 113692513 A CN113692513 A CN 113692513A CN 202080031063 A CN202080031063 A CN 202080031063A CN 113692513 A CN113692513 A CN 113692513A
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CN
China
Prior art keywords
nozzle
combustion chamber
solid material
combustion
outlet insert
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
Application number
CN202080031063.7A
Other languages
Chinese (zh)
Inventor
F·克鲁尔
A·卡尔平斯基
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Doosan Lentjes GmbH
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Doosan Lentjes GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Doosan Lentjes GmbH filed Critical Doosan Lentjes GmbH
Publication of CN113692513A publication Critical patent/CN113692513A/en
Pending 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
    • 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
    • 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
    • F23G7/10—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of field or garden waste or biomasses
    • 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
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M9/00—Baffles or deflectors for air or combustion products; Flame shields
    • F23M9/02—Baffles or deflectors for air or combustion products; Flame shields in air inlets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2202/00—Combustion
    • F23G2202/10—Combustion in two or more stages
    • 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
    • F23L1/00—Passages or apertures for delivering primary air for combustion 
    • F23L1/02—Passages or apertures for delivering primary air for combustion  by discharging the air below the fire

Abstract

The invention relates to an incineration plant for solid materials, having: a combustion material inlet (1) through which solid material can be introduced (1); a combustion chamber (2), into which the solid material is introduced and in which the solid material is combusted (2); -a combustion grate (3), by means of which combustion grate (3) the solid material and the combusted solid material can be transported through the combustion chamber (2); a primary air supply below the top of the combustion grate (3); at least one nozzle arranged above the combustion grate (3), by means of which nozzle a gaseous medium can be supplied, the nozzle having a gas inlet and a gas outlet.

Description

Incineration device for solid material and method for replacing nozzle inserts thereof
Technical Field
The present invention relates to an incineration device for solid material, such as waste or biomass, having: a combustion material inlet through which the solid material is introduced; a combustion chamber into which the solid material is introduced and in which the solid material is combusted, thereby producing flue gas; a combustion grate by means of which the solid material and combusted solid material can be transported through the combustion chamber; a primary air supply below a top of the combustion grate; at least one nozzle arranged above the combustion grate, by means of which nozzle a gaseous medium, such as secondary air, tertiary air and/or an oxygen-depleted carrier gas, can be supplied, the nozzle having a gas inlet and a gas outlet.
Background
The incineration plant usually comprises a combustion grate arranged in the lower section of the combustion chamber, by means of which combustion grate solid material and burned solid material can be transported through the combustion chamber from the combustion material inlet to the slag container. Primary air is typically supplied to the solid material disposed on the combustion grate from below the combustion grate so that the solid material disposed on the combustion grate is combusted with the primary air.
In addition, nozzles are provided above the combustion grate, by means of which nozzles secondary air, tertiary air for secondary combustion or oxygen-depleted carrier gas can be supplied to the flue gases.
At least one empty passage (empty pass) may be arranged downstream of the vertically or horizontally extending combustion chamber, wherein flue gas flows through the at least one empty passage from the combustion chamber to the heat recovery steam generator. In particular, two, three or more parallel empty passages may be implemented.
The heat recovery steam generator downstream of the empty passage may be arranged vertically and/or horizontally (in sections), wherein an inclined orientation is also possible.
The combustion chamber, the air passage and the walls of the heat generator are usually equipped with heat exchangers (i.e. tubes), the heat exchange medium of which is supplied in particular to one common boiler drum.
The flue gas cleaning device downstream of the heat recovery steam generator may comprise elements for dedusting, scrubbing and/or desulphurisation of the flue gas, such as SCR or SNCR. The chimney may be arranged downstream of the flue gas cleaning device.
Typically, a plurality of nozzles are arranged above the combustion grate for providing secondary air, tertiary air and/or oxygen-depleted carrier gas, wherein the nozzles for a specific gaseous medium are connected with their inlets to a common supply. The nozzle is also fixed to the wall of the combustion chamber. If the nozzle is to be replaced due to wear or in order to provide different flow behavior to the supplied gaseous medium, the entire nozzle needs to be disconnected from the central supply and the wall. Therefore, a great effort is required to replace the respective nozzles.
An incineration plant for solid material with the features of the preamble of claim 1 is known from EP 0498014 a 1. GB 795252 a discloses an oven chamber with an ignition device for burning ash-containing fuel, wherein the oven chamber has a nozzle for supplying secondary air. The nozzle comprises a secondary air discharge duct, wherein the circular air discharge channel ends at the inner surface of the wall of the oven chamber. A nozzle insert is mounted at the outlet end of the air discharge passage. The nozzle insert is connected to the air discharge channel by means of a weld arranged at an inner wall surface of the air discharge channel.
Disclosure of Invention
In view of this, it is an object of the invention to provide an incineration apparatus in which the effort for maintenance or replacement of the nozzles is reduced.
This object is achieved by an incineration device having the features of the independent claim and by a method for maintaining the incineration device. Preferred embodiments of the invention are described in the dependent claims and throughout the description, wherein the individual features of the preferred embodiments can be combined with one another in a technically meaningful manner.
The object is achieved in particular in that the gas inlet is realized by a nozzle pipe, which is preferably connected to a common supply line for the gaseous medium and to the wall of the combustion chamber, and the gas outlet is realized by a (separate) outlet insert, which is at least partially inserted into the nozzle pipe, wherein the outlet insert is connected to the nozzle pipe by means of a welded joint. For easy access to the weld joint, it is arranged on the outside of the nozzle pipe.
The invention also proposes a method for replacing an outlet insert of a nozzle in an incineration device, in particular in an incineration device according to the invention, comprising the following steps:
breaking a weld joint between a used outlet insert of the nozzle and the nozzle pipe, said weld joint being arranged on the outside of the nozzle pipe,
-removing the used outlet insert from the nozzle tube,
-inserting a new outlet insert into the nozzle tube,
-welding the new outlet insert to the nozzle tube.
In other words, the invention proposes to provide nozzles in an incineration plant, which are made of multiple parts, wherein in particular nozzle pipes with constant (inner and/or outer) diameter connect the nozzles to a common supply for gaseous medium and to the wall of the combustion chamber, and wherein outlet inserts comprising elements for providing the gaseous medium with the desired flow properties are arranged at least partly and interchangeably in the nozzle pipes. Furthermore, a welded connection is provided between the nozzle pipe and the outlet insert, which welded connection is provided in particular at a location: the welded connection can be broken at least when the incineration device is closed. In this way, the outlet insert can be easily replaced, wherein a new outlet insert can be connected to the nozzle pipe by welding. Thus, not only may outlet inserts be provided that provide the same flow properties to the gaseous medium, but also outlet inserts that provide different flow properties than used outlet inserts may be provided.
The outer diameter of the section of the outlet insert inserted into the nozzle pipe is of the same size/dimension as the inner diameter of the nozzle pipe.
Although it is in principle sufficient that the outlet insert has a constant inner diameter which is smaller than the inner diameter of the nozzle pipe, it is preferred that the outlet insert comprises at least one element providing the desired flow properties to the gaseous medium.
For example, the inner diameter of the outlet insert may decrease along its extension from the inlet side to the outlet side, and may optionally increase after reaching a minimum diameter.
The outlet insert may also comprise a swirl portion (such as a helically extending guide portion in its internal flow cross-section) by means of which a swirl can be provided to the gaseous medium.
The outlet insert may further comprise a deflecting portion by means of which the flow of the gaseous medium is at least partially deflected such that the main direction of the flow of the gaseous medium exiting the outlet insert is inclined with respect to the axial direction of the nozzle pipe.
The outlet insert may also comprise a flow dividing element by means of which the flow of the gaseous medium is divided into two, three or more sub-flows, wherein the main directions of the sub-flows are inclined to each other.
Preferably, the weld joint is accessible from the combustion chamber, so that the weld joint can be broken manually during maintenance of the incineration device when the incineration device is shut down.
In one embodiment it is provided that the outlet insert has a flange which abuts against an end face of the nozzle pipe, wherein the weld joint is provided between the flange and an outer circumference of the end face of the nozzle pipe. In this way, the weld joint is easily accessible, but does not affect the flow properties provided from the outlet insert to the gaseous medium.
In order to fix the nozzle pipes to the wall of the incineration device, it is proposed that the nozzle pipes are arranged partly in an inner wall delimiting the combustion chamber, wherein the nozzle pipes project into the combustion chamber, and wherein the weld joints are arranged on sections of the nozzle pipes extending into the combustion chamber.
Drawings
The present invention and technical background will now be explained with reference to the accompanying drawings showing exemplary embodiments of the present invention. The figures show schematically:
FIG. 1 is a side view of a part of an incineration apparatus, an
Figure 2 is a nozzle of an incineration device with a nozzle tube and an outlet insert.
Detailed Description
The incineration apparatus comprises a combustion chamber 2 with a combustion material inlet 1, through which combustion material (such as waste) can be introduced into the combustion chamber 2. A combustion grate 3 is realized at the bottom of the combustion chamber 2, by means of which combustion grate 3 solid material and combusted material (i.e. ash) can be transported towards a slag outlet 4.
Primary air for combustion of the solid material is provided from below the combustion grate 3. The flue gases generated in the combustion chamber 2 are supplied to a vertically extending empty passage 5. A horizontally extending heat recovery steam generator 6 is arranged downstream of the empty passage 5.
Arranged in the heat recovery steam generator 6 are a superheater heat exchanger 7, an evaporator heat exchanger 8 and an economizer heat exchanger 9, all of which are connected to a common boiler drum 10.
In fig. 2, a nozzle for providing a gaseous medium, such as secondary air, tertiary air and/or an oxygen-depleted carrier gas, into the combustion chamber 2 is depicted.
The combustion chamber 2 is delimited by a wall 15. The nozzle comprises a nozzle tube 11 and an outlet insert 12. The nozzle pipes 11 are connected on the left side to a common supply (not shown) of gaseous medium. The nozzle pipe 11 extends through the wall 15 into the combustion chamber 2.
An outlet insert 12 is inserted into the nozzle pipe 11, wherein the outlet insert 12 comprises a flange 13 abutting against an end face of the nozzle pipe 11.
The outlet insert 12 is connected to the nozzle pipe 11 by a weld joint 13, the weld joint 13 being arranged at the outer circumference of the nozzle pipe 11 and behind a flange 14.
The outlet insert 12 can be easily replaced by breaking the weld joint 13, so that thereafter the outlet insert 12 can be removed from the nozzle pipe 11. After the new outlet insert 12 is inserted, the new outlet insert 12 may be connected to the nozzle pipe 11 by welding.
Although the depicted embodiment of the outlet insert 12 has only a slightly smaller inner diameter than the inner diameter of the nozzle pipe 11, the outlet insert 12 may also have different elements, such as a flow divider, a swirler or the like, in order to influence the flow properties of the provided gaseous medium.
Reference numerals:
1 inlet for combustion material
2 combustion chamber
3 combustion grate
4 slag outlet
5-air passage
6 heat recovery steam generator
7 superheater heat exchanger
8 evaporator heat exchanger
9 economizer heat exchanger
10 boiler steam drum
11 nozzle pipe
12 outlet insert
13 welded joint
14 flange
15 walls.

Claims (8)

1. An incineration apparatus for solid material, having:
-a combustion material inlet (1) through which solid material can be introduced (1),
-a combustion chamber (2), into which combustion chamber (2) the solid material is introduced and which is combusted in the combustion chamber (2),
-a combustion grate (3), by means of which combustion grate (3) the solid material and the combusted solid material can be transported through the combustion chamber (2),
-a primary air supply below the top of the combustion grate (3),
-at least one nozzle arranged above the combustion grate (3), by means of which nozzle a gaseous medium can be supplied, the nozzle having a gas inlet and a gas outlet,
it is characterized in that the preparation method is characterized in that,
the gas inlet is realized by a nozzle pipe (11) and the gas outlet is realized by an outlet insert (12), the outlet insert (12) being at least partially inserted into the nozzle pipe (11), wherein the outlet insert (12) is connected to the nozzle pipe (11) by a welded joint (13), the welded joint (13) being arranged on the outside of the nozzle pipe (11).
2. An incineration apparatus according to claim 1, wherein the weld joint (13) is accessible from the combustion chamber (2).
3. Incineration device according to one of the preceding claims, wherein the outlet insert (12) has a flange (14) abutting against an end face of the nozzle pipe (11), wherein the weld joint (13) is provided between the flange (14) and an outer circumference of the end face of the nozzle pipe (11).
4. Incineration device according to one of the preceding claims, wherein the nozzle pipes (11) are arranged in a wall (15) delimiting the combustion chamber (2), wherein the nozzle pipes (11) project into the combustion chamber (2) and the weld joints (13) are arranged on sections of the nozzle pipes (11) extending into the combustion chamber (2).
5. Incineration device according to one of the preceding claims, wherein the weld joint (13) is realized by at least one of the following:
-a continuous weld seam,
-a plurality of welding passes,
-a plurality of welding points.
6. Incineration device according to one of the preceding claims, wherein the outlet insert (12) comprises at least one of the following:
-a multi-outlet portion having a plurality of outlets,
-a deflection section for deflecting the beam of light,
-a screwing part.
7. Incineration apparatus according to one of the preceding claims, further having:
-an empty passage (5), said empty passage (5) being downstream of said combustion chamber (2),
-a heat recovery steam generator (6), said heat recovery steam generator (6) being downstream of said empty passage (5),
-a flue gas cleaning device downstream of the heat recovery steam generator (6).
8. A method for replacing an outlet insert (12) of a nozzle in an incineration device, the method comprising the steps of:
-breaking a weld joint (13) between a used outlet insert (12) of the nozzle and a nozzle pipe (11), the weld joint (13) being arranged on the outside of the nozzle pipe (11),
-removing the used outlet insert (12) from the nozzle pipe (11),
-inserting a new outlet insert (12) into the nozzle tube (11),
-welding the new outlet insert (12) to the nozzle tube (11).
CN202080031063.7A 2019-05-13 2020-05-07 Incineration device for solid material and method for replacing nozzle inserts thereof Pending CN113692513A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP19174199.0 2019-05-13
EP19174199.0A EP3739264B1 (en) 2019-05-13 2019-05-13 Incineration plant for solid material and method for replacing its nozzle insert
PCT/EP2020/062665 WO2020229285A1 (en) 2019-05-13 2020-05-07 Incineration plant for solid material and method for replacing its nozzle insert

Publications (1)

Publication Number Publication Date
CN113692513A true CN113692513A (en) 2021-11-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202080031063.7A Pending CN113692513A (en) 2019-05-13 2020-05-07 Incineration device for solid material and method for replacing nozzle inserts thereof

Country Status (9)

Country Link
US (1) US20220228742A1 (en)
EP (1) EP3739264B1 (en)
JP (1) JP2022532299A (en)
KR (1) KR20220007594A (en)
CN (1) CN113692513A (en)
DK (1) DK3739264T3 (en)
ES (1) ES2886229T3 (en)
PL (1) PL3739264T3 (en)
WO (1) WO2020229285A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021002508A1 (en) * 2021-05-12 2022-11-17 Martin GmbH für Umwelt- und Energietechnik Nozzle for injecting gas into an incinerator with a tube and a swirler, flue with such a nozzle and method for using such a nozzle

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB795252A (en) * 1955-07-07 1958-05-21 Babcock & Wilcox Ltd Improvements relating to furnace chambers with secondary air supplies
US2956527A (en) * 1955-07-07 1960-10-18 Babcock & Wilcox Co Combustion apparatus for ash containing fuel
GB2077892B (en) * 1980-06-12 1984-04-26 Towler & Son Ltd Refuse incinerator
JPS611910A (en) * 1984-06-13 1986-01-07 Fujihiro Kogyo Kk Water cooling type incinerator
US4911744A (en) * 1987-07-09 1990-03-27 Aga A.B. Methods and apparatus for enhancing combustion and operational efficiency in a glass melting furnace
DE59101576D1 (en) * 1991-02-07 1994-06-09 Martin Umwelt & Energietech Combustion air supply method and furnace.
JPH0933017A (en) * 1995-07-18 1997-02-07 Kubota Corp Refuse incinerator
CA2231278C (en) * 1997-03-12 2002-01-08 Ahlstrom Machinery Oy Protection of the air ports of a recovery boiler
FR2914986B1 (en) * 2007-04-12 2015-04-10 Saint Gobain Isover INTERNAL COMBUSTION BURNER
US7665458B2 (en) * 2007-05-16 2010-02-23 General Electric Company Overfire air tube damper for boiler and method for regulating overfire air
US8714094B2 (en) * 2008-07-25 2014-05-06 Alstom Technology Ltd Fuel fluidizing nozzle assembly
DE102021002508A1 (en) * 2021-05-12 2022-11-17 Martin GmbH für Umwelt- und Energietechnik Nozzle for injecting gas into an incinerator with a tube and a swirler, flue with such a nozzle and method for using such a nozzle

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Publication number Publication date
KR20220007594A (en) 2022-01-18
JP2022532299A (en) 2022-07-14
EP3739264B1 (en) 2021-06-02
ES2886229T3 (en) 2021-12-16
PL3739264T3 (en) 2021-12-13
EP3739264A1 (en) 2020-11-18
US20220228742A1 (en) 2022-07-21
DK3739264T3 (en) 2021-08-30
WO2020229285A1 (en) 2020-11-19

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Application publication date: 20211123