CN113834078A - Hazardous waste incineration anti-slagging disposal technology - Google Patents
Hazardous waste incineration anti-slagging disposal technology Download PDFInfo
- Publication number
- CN113834078A CN113834078A CN202111337413.5A CN202111337413A CN113834078A CN 113834078 A CN113834078 A CN 113834078A CN 202111337413 A CN202111337413 A CN 202111337413A CN 113834078 A CN113834078 A CN 113834078A
- Authority
- CN
- China
- Prior art keywords
- slagging
- incineration
- waste gas
- hazardous waste
- waste
- 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
- 239000002920 hazardous waste Substances 0.000 title claims abstract description 17
- 238000004056 waste incineration Methods 0.000 title claims abstract description 16
- 238000005516 engineering process Methods 0.000 title claims abstract description 12
- 239000002912 waste gas Substances 0.000 claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000446 fuel Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000003647 oxidation Effects 0.000 claims abstract description 6
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000002893 slag Substances 0.000 claims description 5
- 229910052580 B4C Inorganic materials 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- FFBGYFUYJVKRNV-UHFFFAOYSA-N boranylidynephosphane Chemical compound P#B FFBGYFUYJVKRNV-UHFFFAOYSA-N 0.000 claims description 3
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000002341 toxic gas Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 8
- 239000011819 refractory material Substances 0.000 description 3
- 239000002906 medical waste Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007306 turnover Effects 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
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
-
- 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
- F23G5/20—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
- 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
- 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
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
-
- 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
- F23L15/00—Heating of air supplied for combustion
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a hazardous waste incineration anti-slagging disposal technology, which is characterized in that sundries are added into a rotary kiln, and a port is sealed; the temperature of the rotary kiln is controlled at 800-850 ℃, the incineration materials slowly rotate through the spiral plate and are pushed forwards, and the combustion flame rotates along the main combustion cylinder of the furnace body at the speed of 2-3 m/s and moves axially along the furnace body at the speed of 2-3 m/s. The invention has reasonable flow, can burn by rotating and pushing, axially moves a heat source, uniformly heats the burning position, has stable temperature, can burn and melt waste residues after burning, can mechanically scrape the waste residues which can not be melted, can burn the waste gas at high temperature, can recover the heat of combustion oxidation, preheats the inlet gas and saves the fuel consumption of waste gas heating.
Description
Technical Field
The invention relates to the field of waste incineration, in particular to a hazardous waste incineration anti-slagging disposal technology.
Background
The rotary kiln for disposing the medical waste or other industrial waste generally has a slagging phenomenon (commonly called slag) after a period of continuous operation, the treatment capacity of the diameter reduction kiln is reduced until the diameter reduction kiln is closed, the production of enterprises is influenced, the slag inclusion removal process is difficult, and the damage caused by refractory materials is frequently caused. There are many reasons for rotary kiln waste disposal, which are related to the composition of medical waste and the rotary kiln combustion process.
When carrying out waste incineration, there is the insufficient phenomenon of burning, mainly because the long time stability's of heating temperature can't turn over keeps to the dregs after burning can't burn completely, and the waste gas of burning out still has the impurity of part suspension, and the environmental protection of direct exhaust waste gas is not up to standard, and has thermal waste.
Disclosure of Invention
The invention aims to provide a hazardous waste incineration anti-slagging disposal technology to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a hazardous waste incineration anti-slagging disposal technology comprises the following steps: the method comprises the following steps: adding sundries into the rotary kiln, and sealing the port;
step two: the temperature of the rotary kiln is controlled at 800-850 ℃, the incineration materials slowly rotate through the spiral plate and are pushed forwards, and the combustion flame rotates along the main combustion cylinder of the furnace body at the speed of 2-3 m/s and moves axially along the furnace body at the speed of 2-3 m/s;
step three: the residence time in the kiln reaches one hour, and the speed of the forced air is 2-3 m/s to form an interlaced closed fire power net, so that the flame vortex can be fully combusted, and the hazardous waste can be oxidized and incinerated;
step four: the primary waste gas generated during incineration flows through a ceramic heat accumulator and enters a secondary combustion chamber of a waste gas incineration box, and the waste gas is heated to over 1100 ℃ so that toxic gas in the waste gas is oxidized and decomposed into CO2 and H2O;
step five: high-temperature secondary waste gas generated by oxidation flows back from the outside of the ceramic heat accumulator to rotate around the specially-made ceramic heat accumulator for multiple circles and then is discharged, so that the ceramic body is heated to store heat, the heated ceramic heat accumulator heats the secondary waste gas at the residual temperature, and the fuel consumption of waste gas heating is saved.
As a still further scheme of the invention: the secondary combustion chamber is provided with chemical combustion equipment, can generate high temperature of over 1300 ℃ to melt slag, and fully burns ash entering the secondary combustion chamber through powder injection.
As a still further scheme of the invention: the furnace body cover adopts a high-temperature-resistant sealing gasket, and is compressed by matching with flange bolts to form a good sealing measure, and gas is prevented from leaking by negative pressure of high-temperature-resistant negative pressure equipment on the hearth.
As a still further scheme of the invention: the inner parts which can be contacted by high-temperature materials are provided with the furnace lining made of refractory materials, the furnace lining is convenient to replace, and the cost is low.
As a still further scheme of the invention: one or more of boron carbide, silicon carbide, boron nitride, silicon nitride, boron phosphide and silicon phosphide are coated to form the refractory lining.
As a further scheme of the invention: the system also has the function of automatically cleaning ash and preventing slagging, slagging and scraping are carried out on the inner wall through the axially moving arc-shaped shovel plate, and the driving device of the transmission mechanism is assembled on the shell of the kiln.
Compared with the prior art, the invention has the beneficial effects that:
the invention has reasonable flow, can burn by rotating and pushing, axially moves a heat source, uniformly heats the burning position, has stable temperature, can burn and melt waste residues after burning, can mechanically scrape the waste residues which can not be melted, can burn the waste gas at high temperature, can recover the heat of combustion oxidation, preheats the inlet gas and saves the fuel consumption of waste gas heating.
Detailed Description
In the embodiment of the invention, a hazardous waste incineration anti-slagging treatment technology comprises the following steps: the method comprises the following steps: adding sundries into the rotary kiln, and sealing the port;
step two: the temperature of the rotary kiln is controlled at 800-850 ℃, the incineration materials slowly rotate through the spiral plate and are pushed forwards, and the combustion flame rotates along the main combustion cylinder of the furnace body at the speed of 2-3 m/s and moves axially along the furnace body at the speed of 2-3 m/s;
step three: the residence time in the kiln reaches one hour, and the speed of the forced air is 2-3 m/s to form an interlaced closed fire power net, so that the flame vortex can be fully combusted, and the hazardous waste can be oxidized and incinerated;
step four: the primary waste gas generated during incineration flows through a ceramic heat accumulator and enters a secondary combustion chamber of a waste gas incineration box, and the waste gas is heated to over 1100 ℃ so that toxic gas in the waste gas is oxidized and decomposed into CO2 and H2O;
step five: high-temperature secondary waste gas generated by oxidation flows back from the outside of the ceramic heat accumulator to rotate around the specially-made ceramic heat accumulator for multiple circles and then is discharged, so that the ceramic body is heated to store heat, the heated ceramic heat accumulator heats the secondary waste gas at the residual temperature, and the fuel consumption of waste gas heating is saved.
The secondary combustion chamber is provided with chemical combustion equipment, can generate high temperature of over 1300 ℃ to melt slag, and fully burns ash entering the secondary combustion chamber through powder injection.
The furnace body cover adopts a high-temperature-resistant sealing gasket, and is compressed by matching with flange bolts to form a good sealing measure, and gas is prevented from leaking by negative pressure of high-temperature-resistant negative pressure equipment on the hearth.
The inner parts which can be contacted by high-temperature materials are provided with the furnace lining made of refractory materials, the furnace lining is convenient to replace, and the cost is low.
One or more of boron carbide, silicon carbide, boron nitride, silicon nitride, boron phosphide and silicon phosphide are coated to form the refractory lining.
The system also has the function of automatically cleaning ash and preventing slagging, slagging and scraping are carried out on the inner wall through the axially moving arc-shaped shovel plate, and the driving device of the transmission mechanism is assembled on the shell of the kiln.
The working principle of the invention is as follows:
the invention relates to a hazardous waste incineration anti-slagging disposal technology which can carry out rotary pushing incineration and axial movement of a heat source, wherein an incineration position is uniformly heated and has stable temperature, waste residues after incineration can be thermally burnt and melted, the waste residues which cannot be melted can be mechanically scraped, waste gas can be combusted at high temperature, the heat of combustion oxidation can be recovered, inlet air is preheated, and the fuel consumption of waste gas temperature rise is saved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A hazardous waste incineration anti-slagging disposal technology is characterized by comprising the following steps: the method comprises the following steps: adding sundries into the rotary kiln, and sealing the port;
step two: the temperature of the rotary kiln is controlled at 800-850 ℃, the incineration materials slowly rotate through the spiral plate and are pushed forwards, and the combustion flame rotates along the main combustion cylinder of the furnace body at the speed of 2-3 m/s and moves axially along the furnace body at the speed of 2-3 m/s;
step three: the residence time in the kiln reaches one hour, and the speed of the forced air is 2-3 m/s to form an interlaced closed fire power net, so that the flame vortex can be fully combusted, and the hazardous waste can be oxidized and incinerated;
step four: the primary waste gas generated during incineration flows through a ceramic heat accumulator and enters a secondary combustion chamber of a waste gas incineration box, and the waste gas is heated to over 1100 ℃ so that toxic gas in the waste gas is oxidized and decomposed into CO2 and H2O;
step five: high-temperature secondary waste gas generated by oxidation flows back from the outside of the ceramic heat accumulator to rotate around the specially-made ceramic heat accumulator for multiple circles and then is discharged, so that the ceramic body is heated to store heat, the heated ceramic heat accumulator heats the secondary waste gas at the residual temperature, and the fuel consumption of waste gas heating is saved.
2. The hazardous waste incineration anti-slagging disposal technology of claim 1, wherein the system further comprises an automatic ash cleaning and anti-slagging function, the inner wall is subjected to slagging scraping through an axially moving arc-shaped shovel plate, and the transmission mechanism driving device is assembled on the kiln shell.
3. The hazardous waste incineration anti-slagging disposal technique according to claim 1, wherein the secondary combustion chamber is provided with chemical combustion equipment capable of generating high temperature exceeding 1300 ℃ to melt the slag, and the ash entering the secondary combustion chamber is sufficiently combusted by powder injection.
4. The hazardous waste incineration anti-slagging disposal technology according to claim 1, wherein a high temperature resistant sealing gasket is adopted at the furnace body cover and is tightly pressed by matching with a flange bolt to form a good sealing measure, and gas is prevented from leaking by negative pressure of a high temperature resistant negative pressure device on the hearth.
5. The hazardous waste incineration anti-slagging disposal technique according to claim 1, wherein the inner parts that can be contacted by the high temperature material are provided with a refractory lining, which is convenient for changing the lining and low in cost.
6. The hazardous waste incineration anti-slagging disposal technique according to claim 1, wherein the refractory lining material is formed by coating one or more of boron carbide, silicon carbide, boron nitride, silicon nitride, boron phosphide and silicon phosphide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111337413.5A CN113834078A (en) | 2021-11-12 | 2021-11-12 | Hazardous waste incineration anti-slagging disposal technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111337413.5A CN113834078A (en) | 2021-11-12 | 2021-11-12 | Hazardous waste incineration anti-slagging disposal technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113834078A true CN113834078A (en) | 2021-12-24 |
Family
ID=78971059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111337413.5A Pending CN113834078A (en) | 2021-11-12 | 2021-11-12 | Hazardous waste incineration anti-slagging disposal technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113834078A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2804647Y (en) * | 2005-06-03 | 2006-08-09 | 中国有色工程设计研究总院 | Reverse return incinerator for dangerous refuse |
| CN101936534A (en) * | 2010-09-10 | 2011-01-05 | 上海市固体废物处置中心 | Hazardous waste burning method and device for preventing scorification |
| CN102840587A (en) * | 2012-09-03 | 2012-12-26 | 林秀梅 | Compound method and system for directly recovering heat inside and outside rotary kiln |
| CN202792039U (en) * | 2012-08-02 | 2013-03-13 | 上海中发环保(集团)有限公司 | Combined-type incinerator |
| CN204648253U (en) * | 2015-04-23 | 2015-09-16 | 光大环保技术研究院（深圳）有限公司 | A kind of dangerous waste incineration device |
| CN109899791A (en) * | 2017-12-11 | 2019-06-18 | 深圳佰思嘉科技有限公司 | Hazardous waste burn system based on flue gas recirculation |
| CN110762542A (en) * | 2019-11-04 | 2020-02-07 | 中国恩菲工程技术有限公司 | System and method for sludge and hazardous waste co-disposal |
| CN111306549A (en) * | 2020-02-25 | 2020-06-19 | 南京航空航天大学 | Green and efficient rotary kiln incineration treatment method for hazardous wastes based on oxygen-enriched air supply of secondary combustion chamber |
-
2021
- 2021-11-12 CN CN202111337413.5A patent/CN113834078A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2804647Y (en) * | 2005-06-03 | 2006-08-09 | 中国有色工程设计研究总院 | Reverse return incinerator for dangerous refuse |
| CN101936534A (en) * | 2010-09-10 | 2011-01-05 | 上海市固体废物处置中心 | Hazardous waste burning method and device for preventing scorification |
| CN202792039U (en) * | 2012-08-02 | 2013-03-13 | 上海中发环保(集团)有限公司 | Combined-type incinerator |
| CN102840587A (en) * | 2012-09-03 | 2012-12-26 | 林秀梅 | Compound method and system for directly recovering heat inside and outside rotary kiln |
| CN204648253U (en) * | 2015-04-23 | 2015-09-16 | 光大环保技术研究院（深圳）有限公司 | A kind of dangerous waste incineration device |
| CN109899791A (en) * | 2017-12-11 | 2019-06-18 | 深圳佰思嘉科技有限公司 | Hazardous waste burn system based on flue gas recirculation |
| CN110762542A (en) * | 2019-11-04 | 2020-02-07 | 中国恩菲工程技术有限公司 | System and method for sludge and hazardous waste co-disposal |
| CN111306549A (en) * | 2020-02-25 | 2020-06-19 | 南京航空航天大学 | Green and efficient rotary kiln incineration treatment method for hazardous wastes based on oxygen-enriched air supply of secondary combustion chamber |
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